A process for the manufacture of cellulose ethers

Cellulose ethers are prepared from material such as cotton, wood-cellulose, or sulphite-or sodium cellulose by subjecting the raw material to a short preliminary treatment with alkali lyes so as to remove oxycellulose, hemicellulose, pentoses, mannan, and xylan, washing with water till neutral, repeating this preliminary treatment if desired, drying, preparing alkali cellulose without introducing any ripening process, and etherifying with an ester of an inorganic acid. The alkali lye for the preparation of the alkali cellulose, and the etherifying agent are used in about or slightly above the theoretical amount. An example is given of the preparation of ethyl cellulose, the preliminary treatment with the caustic soda of 20-25 DEG B<\>e being repeated 4 to 5 times. The ethyl cellulose possesses a high viscosity and may be used in the preparation of films, insulating materials, lacquers, and plastic masses. Specifications 229,678, 249,173, 278,767 and 288,997, [all in Class 2 (ii), Cellulose ...

Dispersing feedstocks and processing materials

DISPERSING FEEDSTOCKS AND PROCESSING MATERIALS

DISPERSING FEEDSTOCKS AND PROCESSING MATERIALS

Dispersing feedstocks and processing materials

Biomass feedstocks (e.g., plant biomass, animal biomass, and municipal waste biomass) are processed to produce useful products, such as fuels. For example, systems are described that can convert feedstock materials to a sugar solution, which can then be fermented to produce ethanol. Biomass feedstock is dispersed in a liquid medium and then saccharified.

Dispersing Feedstocks And Processing Materials

Biomass feedstocks (e.g., plant biomass, animal biomass, and municipal waste biomass) are processed to produce useful products, such as fuels. For example, systems are described that can convert feedstock materials to a sugar solution, which can then be fermented to produce 5 ethanol. Biomass feedstock is dispersed in a liquid medium and then saccharified.

Method for producing cellulose derivatives

METHOD OF PREPARING POLYSACCHARIDE ETHERS AND APPARATUS

ENVIRONMENTALLY FRIENDLY PROCESS FOR THE PREPARATION OF NANOCELLULOSE AND DERIVATIVES THEREOF

The present disclosure relates to the environmentally preparation of nanocellulose and derivatives thereof. The invention further relates to the preparation of cellulose derivatives.

Wood pulp treatment

Prodn. of cellulose pulp comprises treating lignin in an unbleached sulphite pulp so as to render at least half of lignin soluble to the extent of >=1-5 wt. % soln. of NaOH, heating pulp at 60 degrees C for >=15 mins. in NaOH contg. at least 8 wt. % NaOH or equivalent amount of an other hydroxide and >=1 wt. % of a salt of M2B4O7 (where M is alkali metal or at least the amount of borate, perborate or metaborate which is equivalent in foams of B content, to 1 wt. % of Na2B4O7), and then filtering, washing and bleaching the pulp the prepd. pulp is suitable in manufacture of cellulose esters of good colours and clarity.

Verfahren zur Behandlung von Zellulosematerial zur Verbesserung seiner Massbeständigkeit

Procédé de préparation d'une alcalicellulose

TREATMENT OF REDUCING AGENT MIXTURE, CONTAINING CELLULOSE

METHOD OF PROCESSING MATERIAL CONTAINING LIGNOCELLULOSE

METHOD FOR PRODUCING CELLULOSE DERIVATIVES

METHOD OF TREATING CELLULOSIC MATERIAL TO IMPROVE ITS DIMENSIONAL STABILITY

Method for producing cationized cellulose and method for producing cationized hydroxyalkyl cellulose

A production method of a cationized cellulose or a cationized hydroxyalkylcellulose, including step 1 for adding a cationizing agent to cellulose and mechanically decrystallizing the cellulose and step 2 for adding a basic compound to the mixture obtained in step 1 and mechanically decrystallizing the cellulose, or a production method of a cationized cellulose or a cationized hydroxyalkylcellulose, including a step 3 for adding a basic compound to cellulose and mechanically decrystallizing the cellulose and step 4 for adding a cationizing agent to the mixture obtained in step 3 and mechanically decrystallizing the cellulose. The cellulose and the cationizing agent are allowed to react with each other in step 2 or step 4.

ПРОИЗВОДНЫЕ ЦЕЛЛЮЛОЗЫ

Improvements in or relating to the production of cellulose and organic derivatives of cellulose

Cotton is purified and rendered particularly suitable for the production of cellulose acetate and other cellulose derivatives, by subjecting it, in any order, to a treatment with a weak aqueous caustic alkali solution of a concentration of 2-5 per cent at a temperature of 120-180 DEG C. under pressure, a treatment with a strong aqueous caustic alkali solution of concentration 15-25 per cent at a temperature at least 5 DEG C. above but not more than 30 DEG C. above the highest temperature at which the solution is capable of completely mercerizing cotton, and a bleaching treatment. Cellulose derivatives obtained from the treated cotton show less tendency to discoloration on moulding than those obtained from cotton which has not been treated in this manner. Preferably, the treatment with the more dilute alkali is first given and is followed by the bleach and then by the more concentrated alkali treatment. The bleach may be effected with chlorine, sodium chlorite, or sodium or calcium hypochlorite ...

DISPERSING FEEDSTOCKS AND PROCESSING MATERIALS

Biomass feedstocks (e.g., plant biomass, animal biomass, and municipal waste biomass) are processed to produce useful products, such as fuels. For example, systems are described that can convert feedstock materials to a sugar solution, which can then be fermented to produce ethanol. Biomass feedstock is dispersed in a liquid medium and then saccharified.

PROCESS FOR ACTIVATING POLYSACCHARIDES, POLYSACCHARIDES MADE BY THIS PROCESS AND THEIR USE

The invention concerns a process for activating polysaccharides, wherein the polysaccharide starting material is brought into contact with liquid ammonia at an initial pressure which is higher than atmospheric pressure and at a temperature of at least approximately 25 ~C, the amount of liquid ammonia being sufficient at least for wetting the surface of the polysaccharide starting material which is then expanded. The volume available for the polysaccharide/liquid ammonia system is enlarged in the manner of an explosion by lowering the pressure by at least 5 bar. The process is particularly suitable for activating cellulose, guar gum, starch and chitin. The process enables cellulose to be modified in a novel manner. The activated polysaccharides display higher reactivity and improved elimination of reagents during acylation, alkylation, silylation, xanthogenation and carbomoylation with largely homogeneous reaction processes.

СПОСОБ АКТИВАЦИИ ПОЛИСАХАРИДОВ, ПОЛУЧАЕМЫЕ СОГЛАСНО ЭТОМУ СПОСОБУ ПОЛИСАХАРИДЫ И ИХ ПРИМЕНЕНИЕ

Aqueous hair cleanser

METHOD FOR PRODUCING CELLULOSE ETHER DERIVATIVE

Disclosed is a method for selectively producing a cellulose ether derivative, which is extremely high in reaction efficiency of an organic halide compound. Specifically disclosed is a method for producing a cellulose ether derivative such as a carboxymethyl cellulose or a hydroxyethyl cellulose, wherein a low-crystalline powder cellulose having a crystallinity of not more than 50% is reacted with an organic halide compound such as ethylenechlorohydrine, a monohaloacetic acid or a salt thereof, in the presence of a base. COPYRIGHT KIPO & WIPO 2010 ...

CLEANING AGENT COMPOSITION

A cleaning agent composition containing the following components (A), (B) and (C): 1 to 20 weight % of a polyoxyethylene alkyl ether carboxylate (A) in which the average number of additional moles in the polyoxyethylene is 3.5 or less and the number of carbons in the alkyl group is between 10 and 18; 0.02 to 10 weight % of a cationized hydroxypropyl cellulose (B) represented by general formula (1); and water (C). (In the formula, R1, R2 and R3 each independently represent a substituent having a cationized ethylene oxy group and a propylene oxy group, and n represents a number between 20 and 5000 which is a number representing the average polymerization degree of anhydroglucose. The substitution degree of the cationized ethylene oxy group is between 0.01 and 3 and the substitution degree of the propylene oxy group is between 0.01 and 5.) ...

High-viscosity lithium carboxymethyl cellulose and preparation method therefor and application thereof

The present application belongs to a technical field of modifying natural polymer materials, provides a high-viscosity lithium carboxymethyl cellulose and preparation method therefor and application thereof. Raw materials are fed into a reactor, and the high-viscosity lithium carboxymethyl cellulose is prepared through an alkalization reaction, an etherification reaction, an acidification reaction and a substitution reaction. The prepared high-viscosity lithium carboxymethyl cellulose can be used for preparing a negative electrode plate of a lithium-ion battery. Compared with the existing lithium carboxymethyl cellulose, the high-viscosity lithium carboxymethyl cellulose provided by the present application can not only reduce an application amount in preparing a negative electrode plate of a lithium-ion battery so as to save a using cost, but also promote an electrochemical performance of the material in combination with a sodium lignin sulfonate.

METHOD FOR PRODUCING CATIONIZED CELLULOSE AND METHOD FOR PRODUCING CATIONIZED HYDROXYALKYL CELLULOSE

A production method of a cationized cellulose or a cationized hydroxyalkylcellulose, including step 1 for adding a cationizing agent to cellulose and mechanically decrystallizing the cellulose and step 2 for adding a basic compound to the mixture obtained in step 1 and mechanically decrystallizing the cellulose, or a production method of a cationized cellulose or a cationized hydroxyalkylcellulose, including a step 3 for adding a basic compound to cellulose and mechanically decrystallizing the cellulose and step 4 for adding a cationizing agent to the mixture obtained in step 3 and mechanically decrystallizing the cellulose. The cellulose and the cationizing agent are allowed to react with each other in step 2 or step 4.

VERFAHREN ZUR AKTIVIERUNG VON POLYSACCHARIDEN, DANACH HERGESTELLTE POLYSACCHARIDE UND DEREN VERWENDUNG

PROCEDURE FOR THE PRODUCTION OF CELLULOSE DERIVATIVES

Procedure for the treatment from cellulose material to the improvement of its measure stability

TREATMENT OF A CELLULOSEHALTIGEN MIXTURE WITH A REDUCING MEANS

Dispersing Feedstocks And Processing Materials

Biomass feedstocks (e.g., plant biomass, animal biomass, and municipal waste biomass) are processed to produce useful products, such as fuels. For example, systems are described that can convert feedstock materials to a sugar solution, which can then be fermented to produce 5 ethanol. Biomass feedstock is dispersed in a liquid medium and then saccharified.

Products of reaction of cellulose crystallite aggregates and applications

HAIR COSMETIC

METHOD FOR PRODUCING CELLULOSE ETHER DERIVATIVE

Disclosed is a method for selectively producing a cellulose ether derivative, which is extremely high in reaction efficiency of an organic halide compound. Specifically disclosed is a method for producing a cellulose ether derivative such as a carboxymethyl cellulose or a hydroxyethyl cellulose, wherein a low-crystalline powder cellulose having a crystallinity of not more than 50% is reacted with an organic halide compound such as ethylenechlorohydrine, a monohaloacetic acid or a salt thereof, in the presence of a base.

Molar mass controlled cellulose

According to an example aspect of the present invention, there is provided a method of improving the reactivity and processability of cellulose in order to utilize cheap and easily available raw material and obtain excellent performance for biomaterial manufacturing. 1. A method of improving the reactivity of cellulose and preparing a transportable form of the previous for preparation of thermoplastic , dispersion able or dissolving derivatives , wherein molar mass and molar mass distribution of the cellulose is controlled uniformly to a range between 30 and 300 kDa providing reactive and processable cellulose.2. The method of claim 1 , further comprising controlling molar mass of cellulose raw material via hydrolysis claim 1 , excluding total hydrolysis.3. The method of claim 1 , further comprising selecting cellulose raw material from native softwood pulp claim 1 , native hardwood pulp claim 1 , annual plant pulp claim 1 , softwood sulphite dissolving grade pulp claim 1 , hardwood sulphite dissolving grade pulp claim 1 , ozone treated hydrolyzed pulp or enzyme treated pulp4. The method of claim 1 , further comprising controlling hydrolysis in such manner that after the hydrolysis molar mass and molar mass distribution of the cellulose is in a range between 40 and 200 kDa.5. The method of claim 1 , wherein the cellulose is hydrolyzed by enzymatic treatment claim 1 , ozone treatment claim 1 , hydrogen peroxide treatment claim 1 , alkaline treatment or other chemical treatment claim 1 , before performing a long chain fatty acid modification.6. The method of claim 1 , wherein a long chain fatty acid modification comprises heterogeneous or homogenous esterification of the molar mass controlled cellulose.7. The method of claim 1 , wherein a long chain fatty acid modification comprises heterogeneous etherification of the molar mass controlled cellulose.8. A molar mass controlled cellulose ester having chain length between C6 and C18 and a total degree of substitution (DS ...

CARBOXYMETHYLATED CELLULOSE NANOFIBERS

Carboxymethylated cellulose nanofibers in which the cellulose type I crystallinity is 60% or higher, the aspect ratio is 350 or lower, and the transmittance of light having a wavelength of 660 nm when the carboxymethylated cellulose nanofibers are made into an aqueous dispersion having a solids fraction of 1% (w/v) is 60% or higher.

Patent RU2019136162A3

ВУ“? 2019136162” АЗ Дата публикации: 23.11.2021 Форма № 18 ИЗПМ-2011 Федеральная служба по интеллектуальной собственности Федеральное государственное бюджетное учреждение ж 5 «Федеральный институт промышленной собственности» (ФИПС) ОТЧЕТ О ПОИСКЕ 1. . ИДЕНТИФИКАЦИЯ ЗАЯВКИ Регистрационный номер Дата подачи 2019136162/05(071348) 04.05.2018 РСТ/Е12018/050328 04.05.2018 Приоритет установлен по дате: [ ] подачи заявки [ ] поступления дополнительных материалов от к ранее поданной заявке № [ ] приоритета по первоначальной заявке № из которой данная заявка выделена [ ] подачи первоначальной заявки № из которой данная заявка выделена [ ] подачи ранее поданной заявки № [Х] подачи первой(ых) заявки(ок) в государстве-участнике Парижской конвенции (31) Номер первой(ых) заявки(ок) (32) Дата подачи первой(ых) заявки(ок) (33) Код страны 1. 20175394 05.05.2017 В Название изобретения (полезной модели): [Х] - как заявлено; [ ] - уточненное (см. Примечания) ПРОИЗВОДНЫЕ ЦЕЛЛЮЛОЗЫ Заявитель: БЕТУЛИУМ ОЙ, Е 2. ЕДИНСТВО ИЗОБРЕТЕНИЯ [Х] соблюдено [ ] не соблюдено. Пояснения: см. Примечания 3. ФОРМУЛА ИЗОБРЕТЕНИЯ: [Х] приняты во внимание все пункты см. п см. Примечания [ ] приняты во внимание следующие пункты: р [ ] принята во внимание измененная формула изобретения (см. Примечания) 4. КЛАССИФИКАЦИЯ ОБЪЕКТА ИЗОБРЕТЕНИЯ (ПОЛЕЗНОЙ МОДЕЛИ) (Указываются индексы МПК и индикатор текущей версии) СОЗВ 3/00 (2006.01) СОЗВ 5/00 (2006.01) СОЗВ 5/14 (2006.01) СОЗВ 15/00 (2006.01) 5. ОБЛАСТЬ ПОИСКА 5.1 Проверенный минимум документации РСТ (указывается индексами МПК) СОЗВ 3/00-3/30, 5/00-5/14, 7/00, 15/00-15/06 5.2 Другая проверенная документация в той мере, в какой она включена в поисковые подборки: 5.3 Электронные базы данных, использованные при поиске (название базы, и если, возможно, поисковые термины): РУ\У/Р1, Ебрасепес, Рабеагсь, КОРТО, ИЗРТО 6. ДОКУМЕНТЫ, ОТНОСЯЩИЕСЯ К ПРЕДМЕТУ ПОИСКА Кате- Наименование документа с указанием (где необходимо) частей, Относится к гория* относящихся к предмету ...

PROCEDURE FOR THE ACTIVATION OF POLYSACCHARIDEN, THEREAFTER MANUFACTURED POLYSACCHARIDE AND THEIR USE

Method of preparation of alcalicellulose and ethers of this one

Ethers of oellulose

Powdering Method of Pulp and Process for Preparing Cellulose Ether

DISPERSING FEEDSTOCKS AND PROCESSING MATERIALS

DECOLORIZED RAW COTTON LINTERS AND PREPARATION OF ETHER DERIVATIVES THEREFROM

A process for decolorizing cut raw cotton linters (RCL) through the removal of color bodies contained in the cut RCL mass is disclosed as well as a process for using the resultant decolorized RCL in the production of cellulose ether derivatives.

Treatment of cellulose during bleaching with agent capable of reducing carbonyl groups

The present invention relates to a method for treating a mixture containing cellulose, comprising at least one step of adding at least one agent capable of reducing carbonyl groups. The invention further relates to a specialty cellulose pulp, obtained by a method comprising treatment. Furthermore, the invention relates to the use of the specialty cellulose pulp according to the invention or the specialty cellulose pulp obtained by a method according to the invention for the production of cellulose derivatives or materials containing cellulose molecules, including but not limited to, cellulose ethers or cellulose esters. Cellulose derivatives obtained from the specialty cellulose pulp according to the invention display increased viscosity and/or improved brightness over cellulose derivatives obtained from specialty cellulose pulp not subjected to the inventive treatment.

DISPERSING FEEDSTOCKS AND PROCESSING MATERIALS

Biomass feedstocks (e.g., plant biomass, animal biomass, and municipal waste biomass) are processed to produce useful products, such as fuels. For example, systems are described that can convert feedstock materials to a sugar solution, which can then be fermented to produce ethanol. Biomass feedstock is dispersed in a liquid medium and then saccharified.

METHOD FOR PRODUCING ALKALI CELLULOSE

The present invention relates to a method for producing an alkali cellulose with suppressed decrease in the degree of polymerization as well as with small use amount of a basic compound, and to a method for producing a cellulose ether by using the alkali cellulose thus obtained. Provided by the present invention are: (A) a method for producing an alkali cellulose, comprising Step 1 wherein a cellulose-containing raw material (I) is treated by a pulverizing machine thereby obtaining a cellulose-containing raw material (II) which contains a cellulose having crystallinity in the range of 10 to 55% and Step 2 wherein the cellulose-containing raw material (II) obtained in Step 1 is added by a basic compound with the amount thereof being in the range of 0.6 to 1.5 mol relative to 1 mol of an anhydroglucose unit that constitutes the said cellulose as well as by water with the amount thereof being in the range of 20 to 100% by mass relative to the said cellulose thereby obtaining the alkali cellulose ...

Способ активации целлюлозы методом парового взрыва в щелочной среде

FIELD: pulp industry.SUBSTANCE: invention relates to a method of activating cellulose by steam explosion in an alkaline medium. Method for activation of cellulose by steam explosion involves the following steps: mixing cellulose-containing material in an alkaline solution, blowing with nitrogen, heating to required temperature for 20–30 minutes, holding under excess pressure, complete depressurisation during 10 s, washing with water and drying. Pressure is released via drain valve with safety net. Cellulose ethers can be obtained from cellulose obtained using said method: methylhydroxypropyl cellulose, oxypropyl cellulose, ethyl cellulose, methyl cellulose, cyanoethyl cellulose. Cellulose ethers serve as thickeners, stabilizers and precursors and can be used in chemical, pharmaceutical, food, cosmetic, printing and other industries. During treatment of cellulose material, due to sharp opening of drain valve, pressure in device performing thermal exposure sharply decreases, due to which instantaneous effervescence of liquid phase throughout the volume, including inside plant fibers, with formation of steam. Hydrolysis liquid in form of steam is ejected via drain valve, and cellulose fibers remain in the device performing thermal exposure under pressure, due to available safety net. Formed inside the fiber pairs has volume approximately 1,200 times greater than volume of water.EFFECT: due to sharp boiling, additional physical action takes place in the form of cellulose fiber breakage by steam bubbles, which results in loosening of their supramolecular structure, which further facilitates access of reagents and removal of reaction products both during preparatory operations, and during further production of cellulose esters.1 cl, 3 tbl РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 684 020 C1 (51) МПК C08B 11/06 (2006.01) D21C 9/08 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК C08B 1/06 (2018.08); C08B 11/02 (2018 ...

VERFAHREN ZUR HERSTELLUNG VON CELLULOSEDERIVATEN

Improvements in or relating to alkali cellulose and preparation of cellulose ethers therefrom which give smooth solutions

Cellulosic material is contacted with aqueous alkali in the presence of an inert organic diluent at temperatures of from 0 DEG to 30 DEG C. for 1 to 3 hours, the weight ratio of diluent to cellulosic material being from 6 to 19 parts diluent to one part cellulosic material, said diluent comprising by volume (a) 70-96% of a water miscible inert organic compound selected from aliphatic alcohols having 2-5 carbon atoms, dioxane, tetrahydrofuran, and acetone, (b) 0-16% of a second water miscible inert organic compound different from (a) and consisting of methyl alcohol, ethyl alcohol, or acetone, and (c) 4-15% water, the resulting alkali cellulose being etherified if desired to form the ether. A preferred diluent composition consists of isopropyl alcohol or tertiary butyl alcohol or a mixture of either of these alcohols with methyl or ethyl alcohol. The aqueous alkaline solution may be added to the cellulose and diluent in one or two stages. Thus all the caustic alkali may be added at the start ...

Process for activating polysaccharides, polysaccharides produced by this process, and use thereof

PROCESS FOR PRODUCING CELLULOSE DERIVATIVES

Disclosed is a method for producing cellulose derivatives wherein cellulose is impregnated with an alkali solution, the impregnated cellulose is selectably pressed out, and the cellulose undergoes a substitution or addition reaction, whereby the cellulose derivative is obtained with a degree of substitution DS. The applied cellulose is an ammonia activated cellulose. The molar ratio of the alkali to the AHG (anhydro glucose unit) in the cellulose at the beginning of the substitution or addition reaction does not exceed twice the valve of the desired DS. For the swelling of cellulose, no excess of alkali is required, which does not react to produce alkali cellulose but only adheres to the cellulose as a loose association product. Reagent consumption in the substitution or addition reaction is lower. Fewer secondary products are formed.

CELLULOSE ETHERS AND METHOD OF PREPARING THE SAME

The present invention have discovered that the solution rheology of cellulose ethers prepared from cellulose pulp is altered by mercerizing and recovering cellulose pulp before preparing the cellulose ethers. For example, the solution viscosity of carboxymethyl cellulose (CMC) produced from mercerized and recovered cellulose pulp is significantly greater than that produced from mercerized and recovered cellulose pulp is significantly greater than that produced from non-mercerized cellulosed pulp. The present invention provides a method of preparing cellulose ethers comprising the steps of (a) obtaining mercerized and recovered cellulose pulp, and (b) recovered cellulose pulp into the cellulose ethers. According to one embodiment, the cellulose pulp is southern softwood kraft and the mercerized cellulose pulp has a TAPPI 230 om- 89 viscosity of at most 12 cP. This method, however, may be applied to all cellulose pulps, regardless of their viscosities, including those which, when mercerized ...

Process of production of cellulose ethers

PROCESS FOR IMPROVING THE PROCESSABILITY OF REFINED CELLULOSE PULP

TREATMENT OF A MIXTURE CONTAINING CELLULOSE WITH A REDUCING AGENT

The present invention relates to a method for treating a mixture containing cellulose, comprising at least one step of adding at least one agent capable of reducing carbonyl groups. The invention further relates to a specialty cellulose pulp, obtained by a method comprising said treatment. Furthermore, the invention relates to the use of the specialty cellulose pulp according to the invention or the specialty cellulose pulp obtained by a method according to the invention for the production of cellulose derivatives or materials containing cellulose molecules, including but not limited to, cellulose ethers or cellulose esters. Cellulose derivatives obtained from the specialty cellulose pulp according to the invention display increased viscosity and/or improved brightness over cellulose derivatives obtained from specialty cellulose pulp not subjected to the inventive treatment.

Method for the preparation of cellulose ethers

Aqueous hair cleaning agent

Provided is an aqueous hair cleansing composition, including the following components (A) to (D) and water, in which the aqueous hair cleansing composition has a pH of from 2 to 5 when diluted 20-fold: (A) an anionic surfactant; (B) a cationized hydroxypropyl cellulose having a main chain derived from an anhydroglucose, and having a degree of substitution with cationized ethyleneoxy groups of from 0.01 to 2.9 and a degree of substitution with propyleneoxy groups of from 0.1 to 4.0; (C) an organic solvent selected from (C1) and (C2): (Cl) an aromatic alcohol; and (C2) a polypropylene glycol having a molecular weight of from 200 to 1,000; and (D) a hydroxy monocarboxylic acid or a dicarboxylic acid.

Process for activating polysaccharides, polysaccharides produced by this process, and use thereof

PCT No. PCT/EP96/01274 Sec. 371 Date Nov. 6, 1997 Sec. 102(e) Date Nov. 6, 1997 PCT Filed Mar. 22, 1996 PCT Pub. No. WO96/30411 PCT Pub. Date Oct. 3, 1996The process for activating polysaccharides consists of contacting the polysaccharide with liquid ammonia at an initial pressure which is higher than atmospheric pressure and at a temperature of at least approximately 25 DEG C., the amount of liquid ammonia being sufficient at least for wetting the surface of the polysaccharide starting material which is then expanded. The volume available for the polysaccharide/liquid ammonia system is enlarged in the manner of an explosion by lowering the pressure by at least 5 bar. The process is particularly suitable for activating cellulose, guar gum, starch and chitin. The process enables cellulose to be modified in a novel manner. The activated polysaccharides display higher reactivity and improved elimination of reagents during acylation, alkylation, silylation, xanthogenation and carbomoylation ...

Stabilization of alkali polysaccharides

Improved basic polysaccharides are prepared by contacting a polysaccharide with a tetravalent onium salt such as tetramethylammonium chloride prior to contacting it with a strong base such as sodium hydroxide. Polysaccharide derivatives having a greater degree and uniformity of substitution are prepared from such improved basic polysaccharides.

Verfahren zur Herstellung von in Wasser und/oder Alkali loeslichen Celluloseaethern

TREATMENT OF A MIXTURE CONTAINING CELLULOSE WITH A REDUCING AGENT

TREATMENT OF A MIXTURE CONTAINING CELLULOSE WITH A REDUCING AGENT

The present invention relates to a method for treating a mixture containing cellulose, comprising at least one step of adding at least one agent capable of reducing carbonyl groups. The invention further relates to a specialty cellulose pulp, obtained by a method comprising said treatment. Furthermore, the invention relates to the use of the specialty cellulose pulp according to the invention or the specialty cellulose pulp obtained by a method according to the invention for the production of cellulose derivatives or materials containing cellulose molecules, including but not limited to, cellulose ethers or cellulose esters. Cellulose derivatives obtained from the specialty cellulose pulp according to the invention display increased viscosity and/or improved brightness over cellulose derivatives obtained from specialty cellulose pulp not subjected to the inventive treatment.

CELLULOSE DERIVATIVES

The present description is related to methods for derivatizing cellulose pulp, and to products obtainable using said method.

NOVEL METHOD FOR PROCESSING LIGNOCELLULOSE CONTAINING MATERIAL

The invention is related to a method for processing biomass derived from plants or animals, comprising the steps of : a. pre treating said material with an aqueous solution of acid or base; b. subsequently passaging saturated or super heated steam through said material, wherein the water activity of the process is controlled by means of temperature and pressure of the super heated steam to be less than 1, preferably less than 0.8, more preferably in the range of 0.4-0.8. With such a process it is possible to disintegrate or make more accessible for subsequent treatments the lignocellulose from lignocellulose- containing materials, like wood or other plant material, chitin from exoskeletons from Crustacea like crabs and shrimps, and proteins such as keratin from pig hair or chicken feather, for further derivation, like acylation, oxidation, etherif ication, carboxymethylation or esterif ication, or further enzymatic hydrolysis, and/or for production of chemicals, e.g. as sugars from carbohydrates for fermentation processes such as the production of (bio-) ethanol or as keratine hydrolysates for applications in paper or cosmetics.

PROCESS FOR ACTIVATING POLYSACCHARIDES, POLYSACCHARIDES MADE BY THIS PROCESS AND THEIR USE

The invention concerns a process for activating polysaccharides, wherein the polysaccharide starting material is brought into contact with liquid ammonia at an initial pressure which is higher than atmospheric pressure and at a temperature of at least approximately 25 ~C, the amount of liquid ammonia being sufficient at least for wetting the surface of the polysaccharide starting material which is then expanded. The volume available for the polysaccharide/liquid ammonia system is enlarged in the manner of an explosi on by lowering the pressure by at least 5 bar. The process is particularly suitable for activating cellulose, guar gum, starch and chitin. The process enables cellulose to be modified in a novel manner. The activated polysaccharides display higher reactivity and improved elimination of reagen ts during acylation, alkylation, silylation, xanthogenation and carbomoylation with largely homogeneous reaction processes.

모발 화장료

처리 건조 후의 모발에, 양호한 손가락 통과성과 모발 기름기감의 없음, 정돈감을 부여할 수 있는 모발 화장료, 및 그 제조 방법에 관한 것이다. 카티온화 하이드록시프로필셀룰로오스 (A), 20 ℃ 에 있어서의 물 100 g 에 대한 용해량이 0 ∼ 1 g 인 유제 (B), 및 계면 활성제 (C) 를 함유하는 모발 화장료로서, 카티온화 하이드록시프로필셀룰로오스 (A) 가 안하이드로글루코오스 유래의 주사슬을 갖고, 또한 카티온화 에틸렌옥시기의 치환도가 0.01 ∼ 2.9 이며, 프로필렌옥시기의 치환도가 0.1 ∼ 4.0 인 모발 화장료 및 그 제조 방법이다. The present invention relates to a hair cosmetic composition capable of imparting good fingers, good feeling of hair, and feeling of tidiness to hair after treatment and drying, and a method for producing the same. As the hair cosmetic composition containing the cationic hydroxypropylcellulose (A), the emulsion (B) having a solubility of 0 to 1 g in 100 g of water at 20 캜, and the surfactant (C), cationic hydroxypropyl Wherein the cellulose (A) has an anhydroglucose-derived main chain, the degree of substitution of the cationized ethyleneoxy group is from 0.01 to 2.9, and the degree of substitution of the propyleneoxy group is from 0.1 to 4.0, and a process for producing the same.

Process for obtaining carboxymethyl cellulose from agro-industrial residues and carboxymethyl cellulose and use thereof

The present invention describes an advantageous and effective process for obtaining carboxymethyl cellulose (CMC) from agro-industrial residues, comprising the steps of a) Preparing the raw material, wherein the raw material is washed, dried, grounded and washed again; b) a pumping step, wherein the product obtained from the step a) is reacted with sodium hydroxide; c) a synthesis step, wherein consists in grounding the pulp; adding a solution of isopropanol and distilled water under stirring at room temperature; adding NaOH aqueous solution up to the alkalization of the mixture; adding monochloroacetic acid in isopropanol; filtrating; suspending in methanol solution and neutralizing with acetic acid. The present invention also relates to the CMC obtained from the said process which can be employed in a several industrial processes.

NOVEL METHOD FOR PROCESSING LIGNOCELLULOSE CONTAINING MATERIAL

The invention is related to a method for processing biomass derived from plants or animals, comprising the steps of : a. pre treating said material with an aqueous solution of acid or base; b. subsequently passaging saturated or super heated steam through said material, wherein the water activity of the process is controlled by means of temperature and pressure of the super heated steam to be less than 1, preferably less than 0.8, more preferably in the range of 0.4-0.8. With such a process it is possible to disintegrate or make more accessible for subsequent treatments the lignocellulose from lignocellulose- containing materials, like wood or other plant material, chitin from exoskeletons from Crustacea like crabs and shrimps, and proteins such as keratin from pig hair or chicken feather, for further derivation, like acylation, oxidation, etherif ication, carboxymethylation or esterif ication, or further enzymatic hydrolysis, and/or for production of chemicals, e.g. as sugars from carbohydrates ...

CLEANING AGENT COMPOSITION

A cleaning agent composition containing an anion surfactant (A), glyceryl ether (B) having a C4-12 alkyl group or alkenyl group, a cationized hydroxypropyl cellulose (C) represented by general formula (1), and water (D). (In the formula, R1, R2 and R3 each independently represent a substituent having a cationized ethylene oxy group and a propylene oxy group, and n represents a number between 20 and 5000 which is a number representing the average polymerization degree of anhydroglucose. The substitution degree of the cationized ethylene oxy group is between 0.01 and 3 and the substitution degree of the propylene oxy group is between 0.01 and 5.) ...

Treatment of cellulose during bleaching with agent capable of reducing carbonyl groups

The present invention relates to a method for treating a mixture containing cellulose, comprising at least one step of adding at least one agent capable of reducing carbonyl groups. The invention further relates to a specialty cellulose pulp, obtained by a method comprising treatment. Furthermore, the invention relates to the use of the specialty cellulose pulp according to the invention or the specialty cellulose pulp obtained by a method according to the invention for the production of cellulose derivatives or materials containing cellulose molecules, including but not limited to, cellulose ethers or cellulose esters. Cellulose derivatives obtained from the specialty cellulose pulp according to the invention display increased viscosity and/or improved brightness over cellulose derivatives obtained from specialty cellulose pulp not subjected to the inventive treatment.

Environmentally friendly process for the preparation of nanocellulose and derivatives thereof

The present disclosure relates to the environmentally preparation of nanocellulose and derivatives thereof. The invention further relates to the preparation of cellulose derivatives.

Method of preparing polysaccharide ethers and apparatus

Polysaccharide ethers are prepared in a novel continuous process in which a slurry of a polysaccharide, an alkali metal hydroxide, and an etherifying agent, with or without an inert diluent, are mixed in the substantial absence of molecular or free oxygen and fed through a sinuous tubular reactor under pressure, so that the etherification reaction is continuous. The apparatus for preparing the reaction mixture is also novel.

Stabilization of alkali polysaccharides

Improved basic polysaccharides are prepared by contacting a polysaccharide with a tetravalent onium salt such as tetramethylammonium chloride prior to contacting it with a strong base such as sodium hydroxide. Polysaccharide derivatives having a greater degree and uniformity of substitution are prepared from such improved basic polysaccharides.

METHOD FOR PRODUCING ALKALI CELLULOSE

The present invention relates to a method for producing an alkali cellulose with suppressed decrease in the degree of polymerization as well as with small use amount of a basic compound, and to a method for producing a cellulose ether by using the alkali cellulose thus obtained. Provided by the present invention are: (A) a method for producing an alkali cellulose, comprising Step 1 wherein a cellulose-containing raw material (I) is treated by a pulverizing machine thereby obtaining a cellulose-containing raw material (II) which contains a cellulose having crystallinity in the range of 10 to 55% and Step 2 wherein the cellulose-containing raw material (II) obtained in Step 1 is added by a basic compound with the amount thereof being in the range of 0.6 to 1.5 mol relative to 1 mol of an anhydroglucose unit that constitutes the said cellulose as well as by water with the amount thereof being in the range of 20 to 100% by mass relative to the said cellulose thereby obtaining the alkali cellulose ...

METHOD FOR PRE-TREATING AND DYING CELLULOSE

AN IMPROVED PROCESS FOR THE PRODUCTION OF COMPOSITIONS OF ALKYL POLYGLUCOSIDES FROM LIGNOCELLULOSIC BIOMASS

Procédé amélioré de préparation de compositions à base de polyglucosides d'alkyle qui consiste : 1) mettre un ou plusieurs matériaux végétaux lignocellulosiques constituant l'essentiel des plantes annuelles et pérennes et comportant au moins de la cellulose en contact avec un acide et à réaliser un broyage, 2)puis, à mettre en contact les matériaux végétaux ainsi prétraités en contact avec au moins un alcool pour obtenir une compostion à base de polyglucosides d'alkyle. An improved process for the preparation of compositions based on alkyl polyglucosides which consists in: 1) placing one or more lignocellulosic plant materials constituting most of the annual and perennial plants and comprising at least cellulose in contact with an acid and producing a grinding, 2) then to contact the plant materials thus pretreated in contact with at least one alcohol to obtain a composition based on alkyl polyglucosides.

METHOD TO ACTIVATE POLISSACARÍDIOS, POLISSACARÍDIO BLOWN UP IN THE FORM OF CRYSTALLINE CELLULOSE AND APPLICATION OF CELLULOSE

method for processing lignocellulose-containing material

método para processamento de material contendo lignocelulose. a invenção está relacionada a um método para processamento de biomassa derivada de plantas ou animais, compreendendo as etapas de: a. pré tratamento do referido material com uma solução aquosa de ácido ou base; b. subsequentemente passar vapor saturado ou superaquecido através do referido material, em que a tividade da água do processo é controlada por meio da temperatura e da pressão do vapor superaquecido para ser inferior a 1, de preferência inferior a 0,8, mais preferecialmente na faixa de 0,4-0,8. com tal processo é possível a desintegrar ou tornar mais acessível para os tratamentos subsequentes a lignocelulose a partir dos materiais contendop lignocelulose, com a madeira ou outros materiais vegetais, quitina a partir de exoesqueletos de crustáceos como caranguejos e camarões, e proteínas tais como a queratina do cabelo de porco ou pena de galinha, para derivação adiconal, tal como a acilação, oxidação, eterificação, carboximetilação ou esterificação, ou adicionalmentehidrólise enzimática, e/ou para a produção de produtos químicos, por exemplo, como açúcares a partir de carboidratas para os processos de fermentação, tais como a produção de (bio-) etanol ou como hidrolisados de queratina para aplicações em papel ou cosméticos. method for processing lignocellulose containing material. The invention relates to a method for processing plant or animal derived biomass comprising the steps of: a. pretreatment of said material with an aqueous acid or base solution; B. subsequently passing saturated or superheated steam through said material, wherein the process water activity is controlled by means of the temperature and pressure of the superheated steam to be less than 1, preferably less than 0.8, more preferably in the range. 0.4-0.8. by such a process it is possible to disintegrate or make more accessible for subsequent lignocellulose treatments from lignocellulose containing materials, wood or other ...

POROUS WATER-SOLUBLE NONIONIC CELLULOSE ETHER HAVING EXCELLENT SOLUBILITY AND METHOD FOR PRODUCING THE SAME

There are provided a porous water-soluble nonionic cellulose ether having an average pore size of 36 μm or smaller and an average particle size of from 30 to 300 μm; and a method for continuously producing said cellulose ether comprising the steps of: pulverizing a first water-soluble nonionic cellulose ether to obtain a first pulverized product, and sieving the pulverized product through a sieve having an opening of from 40 to 400 μm to obtain a first residue-on-sieve and a first sieve-passing fraction, wherein a portion or all of the first residue-on-sieve containing particles having particle sizes smaller than and greater than the opening of the sieve is re-pulverized together with a second water-soluble nonionic cellulose ether in the step of pulverizing to obtain a second pulverized product, which is pulverized to obtain the cellulose ether as a second sieve-passing fraction containing the re-pulverized particles.

METHOD OF TREATING CELLULOSIC MATERIAL TO IMPROVE THE USEFULNESS THEREOF AS AN INSULATOR IN ELECTRICAL APPARATUS

METHOD FOR PRODUCING CELLULOSE DERIVATIVES

Disclosed is a method for producing cellulose derivatives wherein cellulose is impregnated with an alkali solution, the impregnated cellulose is selectably pressed out, and the cellulose undergoes a substitution or addition reaction, whereby the cellulose derivative is obtained with a degree of substitution DS. The applied cellulose is an ammonia activated cellulose. The molar ratio of the alkali to the AHG (anhydro glucose unit) in the cellulose at the beginning of the substitution or addition reaction does not exceed twice the valve of the desired DS. For the swelling of cellulose, no excess of alkali is required, which does not react to produce alkali cellulose but only adheres to the cellulose as a loose association product. Reagent consumption in the substitution or addition reaction is lower. Fewer secondary products are formed.

Method for producing cellulose derivatives

METHOD FOR PRODUCTION OF NATURAL SUPER-ABSORBENT MATERIALS

The present disclosure relates to a superabsorbent polymer gel derived from renewable and biodegradable materials such as carboxyalkyl cellulose (CAC). The CAC had a degree of substitution (DS) of 0.5 < DS < 1. The carboxyalkyl cellulose was partially or fully solubilized in alkaline solution and crosslinked with a crosslinker to yield a crosslinked polycarboxy-material with high Water Retention Value (WRV) of at least 118 g/g saline water (0.9 % sodium chloride solution) and Centrifuge Retention Capacity (CRC) of at least 90 g saline water/g superabsorbent material.

TREATMENT OF A MIXTURE CONTAINING CELLULOSE WITH A REDUCING AGENT

The present invention relates to a method for treating a mixture containing cellulose, comprising at least one step of adding at least one agent capable of reducing carbonyl groups. The invention further relates to a specialty cellulose pulp, obtained by a method comprising said treatment. Furthermore, the invention relates to the use of the specialty cellulose pulp according to the invention or the specialty cellulose pulp obtained by a method according to the invention for the production of cellulose derivatives or materials containing cellulose molecules, including but not limited to, cellulose ethers or cellulose esters. Cellulose derivatives obtained from the specialty cellulose pulp according to the invention display increased viscosity and/or improved brightness over cellulose derivatives obtained from specialty cellulose pulp not subjected to the inventive treatment.

Manufactoring process of paper and improved paper obtained

Improvements brought to the preparation of cellulose ethers

AN IMPROVED PROCESS FOR PRODUCTION OF COMPOSITIONS BASED ON ALKYL POLYGLUCOSIDES FROM LIGNOCELLULOSIC BIOMASS

processo para obtenção de carboximetilcelulose a partir de resíduos agroindustriais, uso da carboximetilcelulose, composição de ligante e uso de uma composição de ligante

PROCESS FOR ACTIVATING POLYSACCHARIDES, POLYSACCHARIDES PRODUCED BY THIS PROCESS, AND USE THEREOF

The invention concerns a process for activating polysaccharides, wherein the polysaccharide starting material is brought into contact with liquid ammonia at an initial pressure which is higher than atmospheric pressure and at a temperature of at least approximately 25 °C, the amount of liquid ammonia being sufficient at least for wetting the surface of the polysaccharide starting material which is then expanded. The volume available for the polysaccharide/liquid ammonia system is enlarged in the manner of an explosion by lowering the pressure by at least 5 bar. The process is particularly suitable for activating cellulose, guar gum, starch and chitin. The process enables cellulose to be modified in a novel manner. The activated polysaccharides display higher reactivity and improved elimination of reagents during acylation, alkylation, silylation, xanthogenation and carbomoylation with largely homogeneous reaction processes.

METHOD AND A SYSTEM FOR MANUFACTURING CELLULOSE MATERIAL

The invention relates to a method for manufacturing cellulose material, the method comprising introducing cellulose fibers as raw material pulp (1) to a system, adding an alkalizing agent into the system in order to absorb the alkalizing agent into the cellulose fibers (1), adding an anionic agent into the system in order to absorb said agent into the cellulose 2, 2a, 2b fibers (1), feeding the cellulose fibers (1) to a sieve plate press (6), performing a reaction between the cellulose fibers and the anionic agent at least partly in the sieve plate press (6) in order to produce anionized cellulose fibers having a degree of substitution between 0.05 and 0.35, wherein the reaction is performed at least partly at a consistency of at least 50%. In addition, the invention relates to a system for manufacturing cellulose material and to fibril cellulose produced from anionized cellulose fibers.

Novel method for processing lignocellulose containing material

The invention is related to a method for processing biomass derived from plants or animals, comprising the steps of: a. pre treating said material with an aqueous solution of acid or base; b. subsequently passaging saturated or super heated steam through said material. With such a process it is possible to disintegrate or make more accessible for subsequent treatments the lignocellulose from lignocellulose containing materials, like wood or other plant material, chitin from exoskeletons from Crustacea like crabs and shrimps, and proteins such as keratin from pig hair or chicken feather for production of chemicals, e.g. as sugars from carbohydrates for fermentation processes such as the production of (bio-) ethanol or as keratine hydrolysates for applications in paper or cosmetics.

The production with low degree of polymerization of the water-soluble cellulose ether and containing the water-soluble cellulose ether film coating composition

DISPERSING FEEDSTOCKS AND PROCESSING MATERIALS

Biomass feedstocks (e.g., plant biomass, animal biomass, and municipal waste biomass) are processed to produce useful products, such as fuels. For example, systems are described that can convert feedstock materials to a sugar solution, which can then be fermented to produce ethanol. Biomass feedstock is dispersed in a liquid medium and then saccharified.

POROUS WATER-SOLUBLE NONIONIC CELLULOSE ETHER HAVING EXCELLENT SOLUBILITY AND METHOD FOR PRODUCING THE SAME

There are provided a porous water-soluble nonionic cellulose ether having an average pore size of 36 μm or smaller and an average particle size of from 30 to 300 μm; and a method for continuously producing said cellulose ether comprising the steps of: pulverizing a first water-soluble nonionic cellulose ether to obtain a first pulverized product, and sieving the pulverized product through a sieve having an opening of from 40 to 400 μm to obtain a first residue-on-sieve and a first sieve-passing fraction, wherein a portion or all of the first residue-on-sieve containing particles having particle sizes smaller than and greater than the opening of the sieve is re-pulverized together with a second water-soluble nonionic cellulose ether in the step of pulverizing to obtain a second pulverized product, which is pulverized to obtain the cellulose ether as a second sieve-passing fraction containing the re-pulverized particles.

METHOD FOR PRODUCING CATIONIZED CELLULOSE AND METHOD FOR PRODUCING CATIONIZED HYDROXYALKYL CELLULOSE

A production method of a cationized cellulose or a cationized hydroxyalkylcellulose, including step 1 for adding a cationizing agent to cellulose and mechanically decrystallizing the cellulose and step 2 for adding a basic compound to the mixture obtained in step 1 and mechanically decrystallizing the cellulose, or a production method of a cationized cellulose or a cationized hydroxyalkylcellulose, including a step 3 for adding a basic compound to cellulose and mechanically decrystallizing the cellulose and step 4 for adding a cationizing agent to the mixture obtained in step 3 and mechanically decrystallizing the cellulose. The cellulose and the cationizing agent are allowed to react with each other in step 2 or step 4.

Process for the derivatization of cellulose

There is disclosed a process for the derivatization of cellulose comprising the sequential steps: a) mixing cellulose with a viscosity below 900 ml/g with an aqueous solution to obtain a liquid, wherein particles comprising cellulose in said liquid have a diameter of maximum 200 nm, wherein the temperature of the aqueous solution is below 20° C., and wherein the pH of the aqueous solution is above 12, b) subjecting the liquid to at least one of the steps: i) decreasing the pH of the liquid with at least 1 pH unit, ii) increasing the temperature by at least 20° C., and c) derivatization of the cellulose. Advantages include that there is provided the possibility to derivatize cellulose faster and to a greater extent after the treatment. Further the yield is improved. The product quality is improved and the manufacture is cheaper and easier.

Cellulose Derivatives

The present description is related to methods for derivatizing cellulose pulp, and to products obtainable using said method.

Hydroxyalkylalkyl cellulose for tableting and solid preparation comprising the same

Provided are a hydroxyalkylalkyl cellulose excellent in formability and not causing marked delay in disintegration when added even in a small amount; a solid preparation including the hydroxyalkylalkyl cellulose; and a method for producing the solid preparation. More specifically, provided are a hydroxyalkylalkyl cellulose for tableting having a specific surface area of from 0.5 to 5.0 m 2 /g as measured by BET and a solid preparation including the hydroxyalkylalkyl cellulose. Also provided is a method for producing the hydroxyalkylalkyl cellulose for tableting, including the steps of: bringing pulp into contact with an alkali metal hydroxide solution to obtain an alkali cellulose, reacting the alkali cellulose with an etherifying agent to obtain a first hydroxyalkylalkyl cellulose, grinding the first hydroxyalkylalkyl cellulose, and subjecting the ground first hydroxyalkylalkyl cellulose to hydrolysis in the presence of an acid catalyst or oxidative degradation in the presence of an oxidant to obtain a second hydroxyalkylalkyl cellulose.

Process for producing hydroxyalkyl celluloses

The present invention relates to (1) a process for producing a hydroxyalkyl cellulose having an excellent water-solubility while maintaining a high reaction selectivity by adding a basic compound and an alkyleneoxide to a cellulose to conduct a reaction therebetween in which the basic compound is added in a total amount of from 0.3 to 1.5 mol per 1 mol of an anhydroglucose unit in the cellulose, and the alkyleneoxide is added in a total amount of from 1.0 to 3.0 mol per 1 mol of an anhydroglucose unit in the cellulose, the process including a step of adding the basic compound in an amount of from 50 to 95% of the total amount of the basic compound to be added during the process, and then adding the alkyleneoxide in an amount of from 30 to 80% of the total amount of the alkyleneoxide to be added during the process to react the compounds with the cellulose, thereby obtaining a reaction mixture; and a step of adding a remaining amount of the basic compound and a remaining amount of the alkyleneoxide to the reaction mixture obtained in the previous step to conduct a reaction therebetween; (2) a hydroxyalkyl cellulose produced by the process; and (3) a process for producing a cationized hydroxyalkyl cellulose using the resulting hydroxyalkyl cellulose.

Dispersing feedstocks and processing materials

Biomass feedstocks (e.g., plant biomass, animal biomass, and municipal waste biomass) are processed to produce useful products, such as fuels. For example, systems are described that can convert feedstock materials to a sugar solution, which can then be fermented to produce ethanol. Biomass feedstock is dispersed in a liquid medium and then saccharified.

Environmentally Friendly Process For The Preparation Of Nanocellulose And Derivatives Thereof

The present disclosure relates to the environmentally preparation of nanocellulose and derivatives thereof. The invention further relates to the preparation of cellulose derivatives. 137-. (canceled)40. The process according to claim 39 , wherein the silanes in step viii are selected from mercaptopropyltrimethoxysilane claim 39 , allyltrimethoxysilane claim 39 , triethoxyvinylsilane claim 39 , hexadecyltrimethoxysilane and (3-aminopropyl)trimethoxysilane).41. The process according to claim 38 , wherein the reaction in step viii is carried out in the presence of an organic catalyst claim 38 , and wherein the organic catalyst is preferably an organic acid claim 38 , preferably selected from tartaric acid claim 38 , malic acid claim 38 , citric acid claim 38 , lactic acid and p-toluenesulfonic acid.42. The process according to claim 38 , wherein the organic catalyst is tartaric acid claim 38 , or (S)-tartaric acid claim 38 , or 5%-10% (S)-tartaric acid.43. The process according to claim 38 , wherein the reaction in step viii is carried out for at least 0.5 hour claim 38 , preferably for 1-14 hours claim 38 , and the reaction is carried out an elevated temperature claim 38 , preferably at 60-90° C.46. The process according to claim 38 , wherein the reaction is carried out in UV-light.47. The process of derivatising cellulosic material according to claim 38 , wherein the cellulosic material is prepared according to a process for the preparation of nanocellulose and derivatives thereof claim 38 , comprising the steps of:i. providing a cellulosic material,ii. mixing the cellulosic material with formic acid,iii. heating the reaction mixture to 80-110° C., preferably 90° C.iv. mechanically treating the reaction mixture by (i) mechanically stirring the reaction mixture, and/or (ii) sonication,v. diluting the reaction mixture with a solvent, and optionally neutralizing the reaction mixture to pH 6-8, and optionally separation and recovery of the formic acid by centrifugation ...

Pulverized Pulp and Method of Producing Cellulose Ether Using the Same

An object of the present invention is to provide a pulverized pulp in which the viscosity reduction caused by pulverization is mitigated and a method for producing cellulose ethers using such pulverized pulp. The above object is achieved by a pulverized pulp of being a pulverized product of a raw material pulp having a pH of 7.5 to 10.5 when measured by dispersing the raw material pulp in water, and having a percent decrease of 30% or less in viscosity caused by pulverization; and a method of producing a cellulose ether including reacting an alkali cellulose obtained from the pulverized pulp and an alkali metal hydroxide solution with an etherifying agent to obtain the cellulose ether. 1. A pulverized pulp , comprising a pulverized product of a raw material pulp having a pH of 7.5 to 10.5 when measured by dispersing the raw material pulp in water , and wherein the pulverized pulp is 30% or less viscous than the raw material pulp.2. The pulverized pulp according to claim 1 , wherein the raw material pulp is provided in the form of sheet or chips.3. The pulverized pulp according to claim 1 , wherein the weight of the raw material pulp per unit area is in the range of 650 g/mto 1 claim 1 ,200 g/m.4. The pulverized pulp according to claim 1 , wherein the viscosity of the raw material pulp is in the range of 500 ml/g to 3 claim 1 ,000 ml/g.5. A method of producing a cellulose ether claim 1 , comprising reacting an alkali cellulose obtained from the pulverized pulp according to and an alkali metal hydroxide solution with an etherifying agent to obtain the cellulose ether.6. The method according to claim 5 , wherein the raw material pulp is provided in the form of sheet or chips.7. The method according to claim 5 , wherein the weight of the raw material pulp per unit area is in the range of 650 g/m2 to 1 claim 5 ,200 g/m2.8. The method according to claim 5 , wherein the viscosity of the raw material pulp is in the range of 500 ml/g to 3 claim 5 ,000 ml/g. Benefit is ...

Method for Production of Natural Super-Absorbent Materials

The present disclosure relates to a superabsorbent polymer gel derived from renewable and biodegradable materials such as carboxyalkyl cellulose (CAC). The CAC had a degree of substitution (DS) of 0.5 Подробнее

具有优异溶解性的多孔水溶性非离子型纤维素醚及其生产方法

提供了具有36μm或更小的平均孔径和30μm至300μm的平均粒度的多孔水溶性非离子型纤维素醚；以及提供了连续生产所述纤维素醚的方法，所述方法包括以下步骤：粉碎第一水溶性非离子型纤维素醚以获得第一粉碎产物，以及通过具有40μm至400μm的开孔的筛将所述粉碎产物进行筛分以获得第一筛上残余物和第一过筛部分，其中在粉碎步骤中将一部分或全部的包含粒度小于和大于所述筛的开孔的颗粒的第一筛上残余物与第二水溶性非离子型纤维素醚一起再粉碎以获得第二粉碎产物，将其粉碎以获得作为包含再粉碎颗粒的第二过筛部分的纤维素醚。

Method for producing hydroxyalkyl cellulose

High-viscosity lithium carboxymethyl cellulose and preparation method and application thereof

本申请属于天然高分子材料改性技术领域，提供了一种高黏度羧甲基纤维素锂以及其制备方法和应用。将原料送入反应釜中经碱化反应、醚化反应、酸化反应以及取代反应后制得高黏度羧甲基纤维素锂，制得的高黏度羧甲基纤维素锂能够用于制备锂离子电池负极极片。本申请提供的高黏度羧甲基纤维素锂相较于现有羧甲基纤维素锂不仅能够减少在制备锂离子电池负极极片中的使用量节约使用成本，搭配木质素磺酸钠后还能够提升材料的电化学性能。

Method for producing cellulose ether derivative

The present invention relates to a method for producing an industrially simple and efficient cellulose ether derivative in which a low-crystalline powdery cellulose is reacted with an epoxy compound in the presence of a catalyst.

Method for producing hydroxyalkyl cellulose

【課題】セルロースから、高い反応選択率を維持しつつ、水溶性の優れたヒドロキシアルキルセルロースを製造する方法、その方法により得られるヒドロキシアルキルセルロース、及び得られるヒドロキシアルキルセルロースを用いるカチオン化ヒドロキシアルキルセルロースの製造方法を提供する。 【解決手段】（１）セルロースに塩基化合物とアルキレンオキシドを添加して反応させるヒドロキシアルキルセルロースの製造方法であって、塩基化合物の総添加量が、セルロースのアンヒドログルコース単位１モルあたり０．３〜１．５モルであり、アルキレンオキシドの総添加量が、セルロースのアンヒドログルコース単位１モルあたり１．０〜３．０モルであり、塩基化合物の総添加量の５０〜９５％を添加した後、アルキレンオキシドの総添加量の３０〜８０％を添加し、反応させて、反応混合物を得る工程、該工程で得られた反応混合物に塩基化合物の残余量を添加した後、アルキレンオキシドの残余量を添加して反応させる工程を有する方法、（２）その方法により得られるヒドロキシアルキルセルロース、及び（３）得られるヒドロキシアルキルセルロースを用いるカチオン化ヒドロキシアルキルセルロースの製造方法である。 【選択図】なし

Method for producing cellulose ether derivative

本发明涉及一种纤维素醚衍生物的制造方法，其是在催化剂的存在下，使低结晶性粉末纤维素与环氧化合物反应，工业上简便且高效地制造纤维素醚衍生物的制造方法。

A method and a system for manufacturing cellulose material

The invention relates to a method for manufacturing cellulose material, the method comprising introducing cellulose fibers as raw material pulp (1) to a system, adding an alkalizing agent into the system in order to absorb the alkalizing agent into the cellulose fibers (1), adding an anionic agent into the system in order to absorb said agent into the cellulose fibers (1),feeding the cellulose fibers (1) to a sieve plate press (6), performing a reaction between the cellulose fibers and the anionic agent at least partly in the sieve plate press (6) in order to produce anionized cellulose fibers having a degree of substitution between 0.05 and 0.35, wherein the reaction is performed at least partly at a consistency of at least 50 %. In addition, the invention relates to a system for manufacturing cellulose material and to fibril cellulose produced from anionized cellulose fibers.

Cellulose derivatives

本说明书涉及纤维素浆的衍生化方法，并涉及使用所述方法能够获得的产品。

The manufacture method of alkali cellulose

本发明提供一种纤维素的聚合度的降低少、并且碱的使用量少的碱纤维素的制造方法，以及使用所得的碱纤维素的纤维素醚的制造方法。本发明提供[1]一种碱纤维素的制造方法，其具有：对含纤维素的原料(I)进行粉碎机处理而得到含有结晶度为10～55％的纤维素的含纤维素的原料(II)的工序1，以及在所得的含纤维素的原料(II)中添加相对于构成该纤维素的葡糖酐单元1摩尔为0.6～1.5摩尔的碱化合物、以及相对于该纤维素为20～100质量％的水而得到碱纤维素的工序2；并提供[2]一种纤维素醚的制造方法，其包括使利用上述制造方法制造而得的碱纤维素与醚化剂反应的工序。

Methods and apparatus to analyze and adjust age demographic information.

Se proporciona un éter de celulosa porosa no iónico soluble en agua que tiene un tamaño de poro promedio de 36 µm o menor y un tamaño de partícula promedio de desde 30 hasta 300 µm; y un método para producir continuamente dicho éter de celulosa que comprende las etapas de: pulverizar un primer éter de celulosa no iónico soluble en agua para obtener un primer producto pulverizado, y cribar el producto pulverizado a través de una criba que tiene una abertura de desde 40 hasta 400 µm para obtener un primer un residuo en tamiz y una primera fracción pasante de tamiz, en donde una porción o todo el primer residuo en tamiz que contienen partículas que tienen tamaños de partícula más pequeños y mayores a la abertura de la criba se re-pulverizan juntos con un segundo éter de celulosa no iónico soluble en agua e la etapa de pulverización para obtener un segundo producto pulverizado que se pulveriza para obtener el éter de celulosa como una segunda fracción pasante de tamiz que contiene las partículas re-pulverizadas.

Method for preparing cellulose ether having low degree of polymerization and cellulose ether prepared thereby

提供一种用于制备具有低聚合度并且经受较少黄化的纤维素醚的方法以及由其制备的纤维素醚。更具体地说，提供一种用于制备具有低聚合度的纤维素醚的方法，该方法包含：使浆料和碱金属氢氧化物溶液彼此接触或将它们混合以获得对应碱纤维素的步骤，使所述碱纤维素与氧反应以将所述碱纤维素的粘度减小百分比调整为10至95%的第一解聚步骤，使所述解聚的碱纤维素与醚化剂反应的步骤，洗涤和干燥所述反应产物以获得纤维素醚的步骤，和使所述纤维素醚与盐酸接触以将所述纤维素醚的粘度减小百分比调整为40至99.9%的第二解聚步骤。

Process for improving the processability of refined cellulose pulp

1,271,118. Improving the processability of refined cellulose pulp. MO OCH DOMSJO A.B. 22 Sept., 1969 [3 Oct., 1968], No. 46684/69. Heading C3A. A process for the conversion of cellulose to cellulose acetate or xanthate, or to hydroxyethyl cellulose in which before and/or during the conversion there is added to the cellulose and/or cellulose derivative a mixture of (a) an ethylene oxide adduct having little or no surfactant activity and having the general formula RO(C 2 H 4 O) n H wherein R is phenyl or tolyl and n is an integer from 5-30; and (b) an alkylpolyglycol ether having little or no surfactant activity and having the general formula R 2 O(C 2 H 4 O) m H wherein R 2 is methyl, ethyl, propyl or butyl and m is an integer from 5 to 25, the weight ratio of (a) to (b) being from 50:50 to 95:5. Preferably (a) and (b) are so chosen that the surface tension of an aqueous solution containing 0À2 gram per litre of both (a) and (b) is not lower than 55 dynes/cm. The mixture may be added to cellulose pulp before, during or after the drying thereof in an amount of from 0À2 to 4À0 grams per kg. of dry cellulose.

Process for producing hydroxyalkyl celluloses

The present invention relates to (1) a process for producing a hydroxyalkyl cellulose having an excellent water-solubility while maintaining a high reaction selectivity by adding a basic compound and an alkyleneoxide to a cellulose to conduct a reaction therebetween in which the basic compound is added in a total amount of from 0.3 to 1.5 mol per 1 mol of an anhydroglucose unit in the cellulose, and the alkyleneoxide is added in a total amount of from 1.0 to 3.0 mol per 1 mol of an anhydroglucose unit in the cellulose, the process including a step of adding the basic compound in an amount of from 50 to 95% of the total amount of the basic compound to be added during the process, and then adding the alkyleneoxide in an amount of from 30 to 80% of the total amount of the alkyleneoxide to be added during the process to react the compounds with the cellulose, thereby obtaining a reaction mixture; and a step of adding a remaining amount of the basic compound and a remaining amount of the alkyleneoxide to the reaction mixture obtained in the previous step to conduct a reaction therebetween; (2) a hydroxyalkyl cellulose produced by the process; and (3) a process for producing a cationized hydroxyalkyl cellulose using the resulting hydroxyalkyl cellulose.

Process for the derivatization of cellulose

There is disclosed a process for the derivatization of cellulose comprising the sequential steps: a) mixing cellulose with a viscosity below 900 ml/g with an aqueous solution to obtain a liquid, wherein particles comprising cellulose in said liquid have a diameter of maximum 200 nm, wherein the temperature of the aqueous solution is below 20°C, and wherein the pH of the aqueous solution is above 12, b) subjecting the liquid to at least one of the steps: i) decreasing the pH of the liquid with at least 1 pH unit, ii) increasing the temperature by at least 20°C, and c) derivatization of the cellulose. Advantages include that there is provided the possibility to derivatize cellulose faster and to a greater extent after the treatment. Further the yield is improved. The product quality is improved and the manufacture is cheaper and easier.

Process for activating polysaccharides, polysaccharides produced by this process, and use thereof

High-viscosity lithium carboxymethyl cellulose and preparation method therefor and application thereof

The present application belongs to a technical field of modifying natural polymer materials, provides a high-viscosity lithium carboxymethyl cellulose and preparation method therefor and application thereof. Raw materials are fed into a reactor, and the high-viscosity lithium carboxymethyl cellulose is prepared through an alkalization reaction, an etherification reaction, an acidification reaction and a substitution reaction. The prepared high-viscosity lithium carboxymethyl cellulose can be used for preparing a negative electrode plate of a lithium-ion battery. Compared with the existing lithium carboxymethyl cellulose, the high-viscosity lithium carboxymethyl cellulose provided by the present application can not only reduce an application amount in preparing a negative electrode plate of a lithium-ion battery so as to save a using cost, but also promote an electrochemical performance of the material in combination with a sodium lignin sulfonate.

Aqueous hair cleaning agent

An aqueous hair cleansing agent which contains components (A)-(D) and water, and has a pH of 2-5 when diluted 20 times. (A) an anionic surfactant (B) a cationized hydroxypropyl cellulose which has a main chain derived from anhydroglucose, a degree of substitution by cationized ethyleneoxy groups of 0.01-2.9 and a degree of substitution by propyleneoxy groups of 0.1-4.0 (C) an organic solvent which is selected from among (C1) and (C2) (C1) aromatic alcohols (C2) polypropylene glycols, each of which has a molecular weight of 200-1,000 (D) hydroxy monocarboxylic acids or dicarboxylic acids

Process for obtaining carboxymethyl cellulose from agro-industrial residues and carboxymethyl cellulose and use thereof

본 발명은 농업 잔류물로부터 카복시메틸 셀룰로스(CMC)를 획득하는 유리하고 효과적인 발명을 설명하고, 이는 다음 단계를 포함한다: a) 원료 준비 단계, 여기서 원료가 세척되고, 건조되고, 분쇄되고, 다시 세척됨; b) 펄프화 단계, 여기서 단계 a)로부터 획득한 생성물이 소듐 하이드록사이드와 반응됨; c) 합성 단계, 여기서 펄프 분쇄; 교반하에 실온에서 아이소프로판올 및 증류수의 용액 첨가; 혼합물의 알칼리화까지 NaOH 수용액 첨가; 아이소프로판올 중의 모노클로로아세트산 첨가; 여과; 메탄올 용액 중에 현탁 및 아세트산으로 중화로 이루어짐. 본 발명은 또한, 여러 공업적 공정에서 사용될 수 있는 상기 방법으로부터 획득한 CMC에 관한 것이다.

Process for the derivatization of cellulose

Dispersing feedstocks and processing materials

Biomass feedstocks (e.g., plant biomass, animal biomass, and municipal waste biomass) are processed to produce useful products, such as fuels. For example, systems are described that can convert feedstock materials to a sugar solution, which can then be fermented to produce ethanol. Biomass feedstock is dispersed in a liquid medium and then saccharified.

Process for the production of cellulose derivatives

Improvements in and relating to the production of cellulose ethers

Cellulose ethers are prepared by acting on cellulose with a compound of copper in the presence of an alkali to form an alkali copper cellulose, and treating this with an alkylating or aralkylating agent in the presence of free alkali. The alkli copper cellulose, e.g. sodium cupric cellulose may be obtained by the action of caustic alkali and copper hydroxide on cellulose, by causing cellulose to absorb caustic alkali in excess and working up with finely powdered copper salt, or by impregnating cellulose with a copper salt solution and treating the mixture with caustic alkali. The product, with or without partial separation of the excess caustic alkali is treated with the alkylating agent, and the cellulose ether separated by treatment either with hydrochloric acid or a solution of alkali bisulphate. Separation of the ether in flakes may be assisted by using the hydrochloric acid or bisulphate solution hot, or by adding also salts such as magnesium or alkali sulphate. The cellulose ethers may be used for the manufacture of films, lacquers, filaments, glue-like liquids, or as starting materials for the manufacture of nitro, acetyl, and similar compounds. The following examples are given: (1) sulphite wood pulp is mixed with powdered cupric chloride and introduced into caustic soda solution. The sodium cupric cellulose formed is alkylated with methyl sulphate; (2) the cellulose is separated into fibres, treated with caustic soda solution and worked with cupric chloride. The sodium cupric cellulose is treated with methyl sulphate and the product separated by means of alcohol containing hydrochloric acid; (3) sodium cupric cellulose is treated with methyl sulphate in toluene and the product separated by means of dilute sulphuric acid or a solution of sodium bisulphate and magnesium sulphate; (4) sodium cupric cellulose is treated with methyl sulphate in small portions and the methyl cellulose separated by filtering and treating with methanol containing hydrochloric acid. ...

Method for producing cellulose ether derivative

Process for obtaining activated polysaccharides, polysaccharides made by this process and methods of using them

Making of low viscosity cellulose ethers

ETERES OF CELLULOSE AND METHODS TO PREPARE THEM

Los presentes inventores han descubierto que la reología de solucion de los éteres de celulosa preparados a partir de la pulpa de celulosa está alterada por la mercerizacion y recuperacion de pulpa de celulosa antes de preparar los éteres de celulosa. Por ejemplo, la viscosidad de solucion de celulosa de carboximetilo (CMC) producidos de la pulpa de celulosa mercerizada y recuperada es significativamente más grande que aquella producida a partir de pulpa de celulosa no mercerizada. La presente proporciona un método para preparar éteres de celulosas que comprenden los pasos de a) obtener pulpa de celulosa mercerizada y recuperada y b) convertir la pulpa de celulosa mercerizada y recuperada en éteres de celulosa. De acuerdo con una realizacion la pulpa de celulosa es de kraft de madera blanda austral y la pulpa de celulosa mercerizada posee una viscosidad TAPPI 230 om-89 de a lo sumo 12 cP. Este método, sin embargo, pueden aplicarse a todas las pulpas de celulosa, sin importar su viscosidad, incluyendo aquellas que, una vez mercerizadas tienen una viscosidad superior a 12 cP. La pulpa de celulosa mercerizada está típicamente libre de celulosa III. La pulpa de celulosa mercerizada preparada por este método tiene un mayor porcentaje de celulosa cristalina II y un área cristalina inferior que aquella de pulpa de celulosa no mercerizada. La presente también proporciona un método para preparar una masa de flocosa de celulosa que comprende los pasos de a) obtener pulpa de celulosa mercerizada y recuperada y b) tratar la pulpa mercerizada para formar la masa de flocosa de celulosa. De modo alternativo, el método comprende mercerizar y recuperar una masa de flocosa de celulosa. La masa de flocosa de celulosa preparada por este método tiene una densidad de volumen mayor que la masa de flocosa de celulosa preparada a partir de pulpa de celulosa no mercerizada similar. Además, la ganancia de densidad de volumen es mayor que la esperada de la ganancia de aspereza (peso por unidad ...

Making low viscosity cellulose ethers

Novel method for processing lignocellulose containing material

Method for producing cellulose ether derivative

本发明涉及有机卤化物的反应效率极高、且有选择性地制造纤维素醚衍生物的方法。所述纤维素醚衍生物的制造方法是在碱的存在下，使结晶度为50％以下的低结晶性粉末纤维素与氯乙醇、一卤代乙酸及其盐等有机卤化物反应，从而制造羧甲基纤维素或羟乙基纤维素等纤维素醚衍生物。

Polysacharide activated as crystaline cellulose and process for preparing the same

Invenţia se referă la o polizaharidă activată sub formă de celuloză cristalină şi la un procedeu pentru obţinerea acesteia, în care materialul de pornire - polizaharida - este adus în contact cu amoniac lichid, la o presiune iniţială mai mare ca presiunea atmosferică şi la o temperatură de cel puţin 25°C, cantitatea de amoniac lichid fiind suficientă, cel puţin pentru udarea suprafeţei materialului de pornire - polizaharida - care este apoi expandat. Volumul disponibil pentru sistemul polizaharidă/amoniac lichid este mărit în maniera unei explozii, prin scăderea presiunii cu cel puţin 5bari. Procedeul este potrivit, în special, pentru activarea celulozei, guar-gumei, amidonului şi chitinei. Procedeul face posibilă modificarea celulozei într-un mod nou. Polizaharidele activate prezintă o reactivitate mai mare şi o eliminare îmbunătăţită a reactivilor în timpul acilării, sililării, xantogenării şi carbamilării, cu o omogenitate mărită a proceselor de reacţie. The invention relates to an activated polysaccharide in the form of crystalline cellulose and to a process for preparing it, wherein the starting material - polysaccharide - is contacted with liquid ammonia at an initial pressure higher than the atmospheric pressure and at a temperature of at least 25 ° C, the amount of liquid ammonia being sufficient, at least to water the surface of the starting material - polysaccharide - which is then expanded. The volume available for the polysaccharide / liquid ammonia system is increased in the manner of an explosion by lowering the pressure by at least 5 bar. The process is particularly suitable for the activation of cellulose, guar gum, starch and chitin. The process makes it possible to change the pulp in a new way. Activated polysaccharides exhibit greater reactivity and improved elimination of reagents during acylation, silylation, xanthogenation and carbamylation, with increased homogeneity of the reaction processes.

Novel method for processing lignocellulose containing material

The invention is related to a method for processing biomass derived from plants or animals, comprising the steps of : a. pre treating said material with an aqueous solution of acid or base; b. subsequently passaging saturated or super heated steam through said material, wherein the water activity of the process is controlled by means of temperature and pressure of the super heated steam to be less than 1, preferably less than 0.8, more preferably in the range of 0.4-0.8. With such a process it is possible to disintegrate or make more accessible for subsequent treatments the lignocellulose from lignocellulose- containing materials, like wood or other plant material, chitin from exoskeletons from Crustacea like crabs and shrimps, and proteins such as keratin from pig hair or chicken feather, for further derivation, like acylation, oxidation, etherif ication, carboxymethylation or esterif ication, or further enzymatic hydrolysis, and/or for production of chemicals, e.g. as sugars from carbohydrates for fermentation processes such as the production of (bio-) ethanol or as keratine hydrolysates for applications in paper or cosmetics.

A kind of preparation method of low viscosity pharmaceutic adjuvant plant capsule hydroxypropyl methylcellulose

本发明公开了一种低粘度药用辅料植物胶囊用羟丙甲纤维素的制备方法，包括以下步骤：将精制棉粉碎后投入甲苯、异丙醇和水的混合溶剂中，加入固体氢氧化钠进行纤维素的碱化处理，整个过程6‑8小时；投入环氧丙烷和氯甲烷，开始阶段升温醚化反应；将醚化反应后的物料打入脱溶釜进行，中和后开始升温脱溶，时间总计2.5‑3.5小时，保持100℃以上进行离心分离，分离到降粘釜进行降粘；降粘时间3‑4小时，温度维持在95℃以上，降粘完毕调节pH在5‑6之间；降粘后将物料离心至有8‑10吨95℃以上软化水的洗涤釜中，离心完毕后保持温度出料、干燥；并进行粉碎、过筛、包装，即可。

Method for producing alkali cellulose

The present invention relates to a method for producing an alkali cellulose with suppressed decrease in the degree of polymerization as well as with small use amount of a basic compound, and to a method for producing a cellulose ether by using the alkali cellulose thus obtained. Provided by the present invention are: (A) a method for producing an alkali cellulose, comprising Step 1 wherein a cellulose-containing raw material (I) is treated by a pulverizing machine thereby obtaining a cellulose-containing raw material (II) which contains a cellulose having crystallinity in the range of 10 to 55% and Step 2 wherein the cellulose-containing raw material (II) obtained in Step 1 is added by a basic compound with the amount thereof being in the range of 0.6 to 1.5 mol relative to 1 mol of an anhydroglucose unit that constitutes the said cellulose as well as by water with the amount thereof being in the range of 20 to 100% by mass relative to the said cellulose thereby obtaining the alkali cellulose; and (B) a method for producing a cellulose ether by reacting the alkali cellulose produced by the foregoing production method with an etherification agent.

Dispersing feedstocks and processing materials for saccharification

BIOMASS FEEDSTOCKS (E.G., PLANT BIOMASS, ANIMAL BIOMASS, AND MUNICIPAL WASTE BIOMASS) ARE PROCESSED TO PRODUCE USEFUL PRODUCTS, SUCH AS FUELS. FOR EXAMPLE, SYSTEMS ARE DESCRIBED THAT CAN CONVERT FEEDSTOCK IS DISPERSED IN A LIQUID MEDIUM AND THE SACCHARIFIED. (FIGURE 2A)

Cleaning agent composition

一种清洁剂组合物，所述清洁剂组合物含有（A）阴离子表面活性剂、（B）具有碳原子数为4～12的烷基或者烯基的甘油基醚、（C）下述通式（1）所表示的阳离子化羟丙基纤维素（式中，R 1 、R 2 和R 3 分别独立地表示具有阳离子化乙烯氧基和丙烯氧基的取代基，n表示葡萄糖酐的平均聚合度并且为20～5000的数。阳离子化乙烯氧基的取代度为0.01～3，丙烯氧基的取代度为0.01～5）、以及（D）水。

The manufacture method of soda cellulose

本发明提供一种纤维素的聚合度的降低少、并且碱的使用量少的碱纤维素的制造方法，以及使用所得的碱纤维素的纤维素醚的制造方法。本发明提供[1]一种碱纤维素的制造方法，其具有：在相对于含纤维素的原料中的构成纤维素的葡糖酐单元1摩尔为0.6～1.5摩尔的碱化合物的存在下、以及在相对于该含纤维素的原料中的纤维素而言的水分量为10质量％以下的条件下，将该含纤维素的原料粉碎，得到中值粒径为150μm以下的纤维素粉末混合物的工序1；以及向该纤维素粉末混合物中添加水，将水分量相对于纤维素调整为30～100质量％，得到粉末状的碱纤维素的工序2。此外，还提供[2]一种纤维素醚的制造方法，其是使利用上述制造方法制造出的碱纤维素与醚化剂反应。

Cellulose derivatives

The present description is related to methods for derivatizing cellulose pulp, and to products obtainable using said method.

非イオン性水溶性セルロースエーテルの製造方法

Activation process of polysaccharides, and polysaccharides prepared in such a manner

Je popsán způsob aktivace polysacharidů, při kterém se výchozí polysacharidový materiál uvádí do styku s kapalným amoniakem za výchozího tlaku, který je vyšší než atmosférický tlak a při teplotě nejméně 25.sup.o.n.C, přičemž množství kapalného amoniaku je dostatečné alespoň ke zvlhčení povrchu výchozího polysacharidového materiálu, a nakonec se tlak sníží, přičemž se objem, který je k dispozici systému polysacharid-kapalný amoniak, explozivně zvětší za poklesu tlaku nejméně o 50 MPa. Způsob je vhodný zejména k aktivaci celulozy, guarové gumy, škrobu a chitinu. Tímto způsobem lze získat novou modifikaci celulozy. Aktivované polysacharidy vykazují vyšší reaktivitu a využití reagencií při acylaci, alkylaci, silylaci, xantogenaci a karbamoylaci, přičemž je průběh reakce velmi homogenní.ŕ Disclosed is a method for activating polysaccharides, wherein the starting polysaccharide material is contacted with liquid ammonia at an initial pressure above atmospheric pressure and at a temperature of at least 25 ° C, wherein the amount of liquid ammonia is sufficient to at least wet the surface of the starting polysaccharide finally, the pressure is reduced, and the volume available to the polysaccharide-liquid ammonia system is explosively increased at a pressure drop of at least 50 MPa. The method is particularly suitable for activating cellulose, guar gum, starch and chitin. In this way, a new cellulose modification can be obtained. The activated polysaccharides show a higher reactivity and use of the reagents in acylation, alkylation, silylation, xanthation and carbamoylation, the reaction being very homogeneous.

Co-production method of microcrystalline cellulose and polyol in terms of cellulose hydrolysis and lignocellulose liquefaction

본 발명은 리그노셀루로식 바이오매스(A)에서 리그닌과 헤미셀루로스를 제거한 펄프제조공정(A)에서 제조된 셀루로오스를 산가수분해하여 주로 MCC(A)를 제조하고, MCC(A) 제조에서 발생한 residue(A)를 산업폐기물로 배출하는 것 대신에 리그노셀루로식 바이오매스(B)로 순환하고, 펄프제조공정(A)에서 제거된 리그닌과 헤미셀루로스를 바이오매스액화공정(B)으로 순환하여 리그노셀루로식 바이오매스(B)로부터 액화바이오매스를 제조하고 액화바이오매스를 필터링하여 폴리올(B)를 분리하고 발생하는 residue(B)는 펄프제조공정(A)의 원료인 리그노셀루로식 바이오매스(A)로 순환시키고 제조된 폴리올(B)에서 MCC(B)를 분리하여, 펄프제조공정(A)에서 제조된 셀루로오스를 산가수분해하여 주로 MCC(A)를 제조하는 공정과 바이오매스액화공정(B)에서 주로 폴리올(B)을 제조하는 공정에서 산업폐기물을 최소화하고 폴리올과 MCC를 효율적으로 동시 제조하는 것에 관한 것이다. The present invention relates to a process for producing a cellulose acylate, which comprises lignin and hemicellulose removed from lignocellulosic biomass (A), acid hydrolysis of cellulose produced in the pulp manufacturing process (A) to produce MCC (A) ) Instead of discharging the residue (A) produced in the pulp manufacturing process (A) to industrial waste, lignin and hemicellulose removed in the pulp manufacturing process (A) are circulated to the lignocellulosic biomass (B) (B) from the lignocellulosic biomass (B), and the liquefied biomass is filtered to separate the polyol (B), and the resulting residue (B) MCC (B) is separated from the polyol (B) produced by circulating the raw material lignocellulosic biomass (A), and acid hydrolysis of cellulose produced in the pulp manufacturing process (A) (B) in the biomass liquefaction process (B) Minimize industrial waste in the manufacturing process, and that relates to the efficient co-produced by the polyol and the MCC.

Process for activating polysaccharides polysaccharides made by this process and their use

Raw material dispersion and material processing

Un procedimiento que comprende: sacarificar una materia prima de biomasa en un recipiente, habiéndose dispersado la materia prima de biomasa en un medio líquido usando un sistema dispersante que extrae la materia prima y el medio líquido del recipiente y recircula la materia prima y el medio líquido de vuelta al recipiente, donde el sistema dispersante comprende una cámara y, dentro de la cámara, un miembro giratorio que incorpora la materia prima y el medio líquido en la cámara axialmente y expulsa una dispersión de materia prima en el medio desde la cámara radialmente. A method comprising: saccharifying a biomass raw material in a container, the biomass raw material having been dispersed in a liquid medium using a dispersing system that extracts the raw material and the liquid medium from the container and recirculates the raw material and the liquid medium back to the container, where the dispersing system comprises a chamber and, within the chamber, a rotating member that incorporates the raw material and the liquid medium into the chamber axially and expels a dispersion of raw material in the medium from the chamber radially.

Method for preparing cellulose ether having low degree of polymerization and cellulose ether prepared thereby

Method for producing cellulose ether derivative

Method for producing cellulose ether derivative

The present invention relates to a process for selectively producing a cellulose ether derivative with a very high reaction efficiency of an organohalide compound. There is provided a process for producing a cellulose ether derivative such as carboxymethyl cellulose and hydroxyethyl cellulose in which a low-crystalline powdery cellulose having a crystallinity of 50% or less is reacted with an organohalide compound such as ethylene chlorohydrin, a monohaloacetic acid and a salt of the monohaloacetic acid in the presence of a base.

Dispersing feedstocks and processing materials.

Las materias primas de masa biológica (masa biológica de plantas, masa biológica de animales, y masa biológica de. residuos municipales) son procesadas para producir productos útiles, tales como combustibles. Por ejemplo, se describen sistemas que pueden convertir los materiales de materias primas a una solución de azúcar, que después puede ser fermentada para producir etanol. La materia prima de masa biológica es dispersada en un medio líquido y después sacarificada.

A method and a system for manufacturing cellulose material

Method for producing cellulose ether

Provided is a method for producing a cellulose ether having a high viscosity while keeping the same degree of polymerization as that in the production of a shaped pulp without changing a raw material or production facility. More specifically, provided is a method for producing a cellulose ether including steps of: cutting or pulverizing pulp to obtain sheet-like, chip-like, or powdery cellulose pulp, wherein the pulp is formed in a form of roll whose surface layer on at least one of the circumferential side and the ends is removed, or in a form of bale whose surface layer on at least one side is removed; bringing the obtained cellulose pulp into contact with an alkali metal hydroxide solution to obtain alkali cellulose; reacting the alkali cellulose with an alkylating agent to obtain a reaction product mixture; and subjecting the reaction product mixture to purification to obtain the cellulose ether.

A method and a system for manufacturing cellulose material

本发明涉及一种用于制造纤维素材料的方法，该方法包括将纤维素纤维作为原料浆液(1)引入系统，向系统中加入碱化剂以使碱化剂吸收到纤维素纤维(1)中，向系统中加入阴离子剂以使所述试剂吸收到纤维素纤维(1)中，将纤维素纤维(1)供给到筛板压机(6)，在筛板压机(6)中至少部分地进行纤维素纤维和阴离子剂之间的反应，从而生产取代度为0.05-0.35的阴离子化的纤维素纤维，其中该反应至少部分地在至少50％的稠度条件下进行。另外，本发明涉及一种用于制造纤维素材料的系统，还涉及由阴离子化的纤维素纤维生产的纤丝纤维素。

biomass raw material saccharification system

matérias-primas de biomassa (por exemplo, biomassa de plantas, biomassa animal e biomassa de resíduos municipais) são processadas para produzir produtos úteis, tais como combustíveis. por exemplo, sistemas são descritos que podem converter materiais de matéria-prima em uma solução de açúcar que pode, então, ser fermentada para produzir etanol. a matéria-prima de biomassa é dispersa em um meio líquido e, em seguida, sacarificada. Biomass raw materials (eg plant biomass, animal biomass and municipal waste biomass) are processed to produce useful products, such as fuels. for example, systems are described that can convert raw material materials into a sugar solution that can then be fermented to produce ethanol. the biomass raw material is dispersed in a liquid medium and then saccharified.

Process of refining hardwood pulp

Hair cosmetic

本发明涉及一种能够对处理干燥后的毛发赋予良好的手指通过性和没有发粘感、齐整性的毛发化妆品及其制造方法。所述毛发化妆品含有：阳离子化羟丙基纤维素（A）、在20℃下相对于100g水的溶解量为0～1g的油剂（B）、以及表面活性剂（C），阳离子化羟丙基纤维素（A）具有来自脱水葡萄糖的主链，并且阳离子化乙烯氧基的取代度为0.01～2.9，丙烯氧基的取代度为0.1～4.0。

DISPERSION OF INITIAL RAW MATERIALS AND MATERIAL PROCESSING

Сырье, представляющее собой биомассу (например, растительную биомассу, животную биомассу и биомассу из городских сточных вод), перерабатывают для получения полезных продуктов, таких как топлива. Например, описаны системы, которые могут превращать сырьевые материалы в сахаросодержащий раствор, который далее можно подвергнуть ферментации с получением этанола. Сырье из биомассы диспергируют в жидкой среде, а затем осахаривают. Raw materials representing biomass (for example, plant biomass, animal biomass, and biomass from municipal wastewater) are processed to produce useful products such as fuels. For example, systems have been described that can convert raw materials into a sugar-containing solution, which can then be fermented to produce ethanol. Biomass feedstock is dispersed in a liquid medium and then saccharified.

Process for the preparation of ethers of cellulose

Production of cellulose derivatives

DISPERSION OF INITIAL RAW MATERIALS AND MATERIAL PROCESSING

Сырье, представляющее собой биомассу (например, растительную биомассу, животную биомассу и биомассу из городских сточных вод), перерабатывают для получения полезных продуктов, таких как топлива. Например, описаны системы, которые могут превращать сырьевые материалы в сахаросодержащий раствор, который далее можно подвергнуть ферментации с получением этанола. Сырье из биомассы диспергируют в жидкой среде, а затем осахаривают. Raw materials representing biomass (for example, plant biomass, animal biomass, and biomass from municipal wastewater) are processed to produce useful products such as fuels. For example, systems have been described that can convert raw materials into a sugar-containing solution, which can then be fermented to produce ethanol. Biomass feedstock is dispersed in a liquid medium and then saccharified.

Treatment of a mixture containing cellulose with a reducing agent

The present invention relates to a method for treating a mixture containing cellulose, comprising at least one step of adding at least one agent capable of reducing carbonyl groups. The invention further relates to a specialty cellulose pulp, obtained by a method comprising treatment. Furthermore, the invention relates to the use of the specialty cellulose pulp according to the invention or the specialty cellulose pulp obtained by a method according to the invention for the production of cellulose derivatives or materials containing cellulose molecules, including but not limited to, cellulose ethers or cellulose esters. Cellulose derivatives obtained from the specialty cellulose pulp according to the invention display increased viscosity and/or improved brightness over cellulose derivatives obtained from specialty cellulose pulp not subjected to the inventive treatment.

Method of treating cellulosic material to improve the usefulness thereof as an insulator in electrical apparatus

A method of increasing the dimensional stability of cellulosic material by impregnating the cellulose with a composition including a cellulose swelling agent and a compound capable of crosslinking with the cellulose molecules. The swelling agent is capable of swelling the cellulose beyond its full water swollen condition and the crosslinking compound crosslinks with the cellulose molecules to thereby reduce the number of potential water absorbing sites and render the cellulose more dimensionally stable. The cross-linking takes place at elevated temperatures in the absence of an acidic catalyst and the cross-linked cellulosic materials are useful as insulators in electrical apparatus. Aminoplasts may be used as cross-linkers and, among others, nitrogen containing compounds such as dimethyl formamide and various amines may be used as swelling agents.

Aqueous hair cleaning agent

Binder for nonaqueous electrolyte secondary batteries, electrode composition for nonaqueous electrolyte secondary batteries, electrode for nonaqueous electrolyte secondary batteries, nonaqueous electrolyte secondary battery and method for producing binder for nonaqueous electrolyte secondary batteries

A binder for nonaqueous electrolyte secondary batteries, said binder containing a carboxymethyl cellulose and/or a salt thereof, while being characterized in that the carboxymethyl cellulose and/or a salt thereof satisfies the conditions (A) and (B) described below. Condition (A): The degree of carboxymethyl substitution per glucose unit is from 0.5 to 1.5. Condition (B): The viscosity ratio of the viscosity Vb (30 rpm, 23°C) of an aqueous dispersion thereof having a solid content of 3% (w/v) to the viscosity Va (30 rpm, 23°C) of an aqueous dispersion thereof having a solid content of 2% (w/v), namely Vr1 = Vb/Va satisfies Vr1 > 3.

biomass raw material saccharification method and system

dispersão de estoques de alimentação e materiais de processamento estoques de alimentação de biomassa (por exemplo, biomassa de plantas, biomassa animal e biomassa de resíduos municipais) são processados para produzir produtos úteis, tais como combustíveis. por exemplo, sistemas são descritos que podem converter materiais de estoque de alimentação em uma solução de açúcar que pode, então, ser fermentada para produzir etanol. o estoque de alimentação de biomassa é disperso em um meio líquido e, em seguida, sacarificado. Disposal of feed stocks and processing materials Biomass feed stocks (eg plant biomass, animal biomass and municipal waste biomass) are processed to produce useful products such as fuels. For example, systems are described that can convert feedstock materials into a sugar solution that can then be fermented to produce ethanol. The biomass feed stock is dispersed in a liquid medium and then saccharified.

Porous water-soluble nonionic cellulose ether having excellent solubility and method for producing the same

提供了具有36μm或更小的平均孔径和30μm至300μm的平均粒度的多孔水溶性非离子型纤维素醚；以及提供了连续生产所述纤维素醚的方法，所述方法包括以下步骤：粉碎第一水溶性非离子型纤维素醚以获得第一粉碎产物，以及通过具有40μm至400μm的开孔的筛将所述粉碎产物进行筛分以获得第一筛上残余物和第一过筛部分，其中在粉碎步骤中将一部分或全部的包含粒度小于和大于所述筛的开孔的颗粒的第一筛上残余物与第二水溶性非离子型纤维素醚一起再粉碎以获得第二粉碎产物，将其粉碎以获得作为包含再粉碎颗粒的第二过筛部分的纤维素醚。

Method for Preparation of Very Low Viscosity Hydroxylalkyl Cellulose with Partial Neutralization

본 발명은 부분 중화법을 통한 초저점도 히드록시알킬 셀룰로오스의 제조방법에 관한 것으로, 상기 방법은 셀룰로오스를 알칼리화제와 반응시켜 알칼리화된 셀룰로오스를 얻는 단계; 알칼리화된 셀룰로오스를 에테르화제와 반응시켜 히드록시알킬 셀룰로오스를 얻는 단계; 상기 히드록시알킬 셀룰로오스를 1차 중화하는 단계; 상기 히드록시알킬 셀룰로오스를 과산화수소를 사용하여 분해하는 단계; 및 상기 히드록시알킬 셀룰로오스를 2차 중화하는 단계를 포함한다. 이와 같은 방법을 통해 산 처리를 통한 분해시 발생할 수 있는 팽윤 등의 공정상 문제점을 방지하면서 초저점도 히드록시알킬 셀룰로오스를 제조할 수 있다.

saccharification method of biomass raw material

matérias-primas de biomassa (por exemplo, biomassa de plantas, biomassa animal e biomassa de resíduos municipais) são processadas para produzir produtos úteis, tais como combustíveis. por exemplo, sistemas são descritos que podem converter materiais de matéria-prima em uma solução de açúcar que pode, então, ser fermentada para produzir etanol. a matéria-prima de biomassa é dispersa em um meio líquido e, em seguida, sacarificada. Biomass raw materials (eg plant biomass, animal biomass and municipal waste biomass) are processed to produce useful products such as fuels. For example, systems are described that can convert raw material materials into a sugar solution that can then be fermented to produce ethanol. The biomass feedstock is dispersed in a liquid medium and then saccharified.

Process for producing non-crystalline cellulose

The invention relates to a highly productive process for producing decrystallized cellulose which includes treating a cellulose-containing raw material by means of a mill, wherein the cellulose-containing raw material has a cellulose content of a residue obtained by removing water from the cellulose-containing raw material of 20 mass% or more, has a cellulose I-type crystallinity of cellulose more than 33% as calculated from the following formula (1): Cellulose I-type Crystallinity (%) = [(I22.6 - I18.5) /I22.6] x 100 (1), wherein I22.6 is a diffraction intensity of a lattice plane (002 plane) as measured at a diffraction angle 2.theta. of 22.6° in X-ray diffraction analysis; and I18.5 is a diffraction intensity of an amorphous moiety as measured at a diffraction angle 2.theta. of 18.5° in X-ray diffraction analysis, and has a water content of 1.8 mass% or less, to thereby reduce the cellulose I-type crystallinity to 33% or less.

Processo ecológico para a preparação de nanocelulose e derivados desta

Behandlung von einer cellulosehaltigen mischung mit einem reduzierenden mittel

Cleaning agent composition

A CLEANSING COMPOSITION COMPRISING THE FOLLOWING COMPONENTS (A), (B), AND (C): (A) FROM 1 TO 20% BY WEIGHT OF A POLYOXYETHYLENE ALKYL ETHER CARBOXYLATE IN WHICH THE AVERAGE ADDITION MOLE NUMBER OF THE POLYOXYETHYLENE IS 3.5 OR LESS AND THE NUMBER OF CARBONS IN THE ALKYL GROUP IS FROM 10 TO 18, (B) FROM 0.02 TO 10% BY WEIGHT OF CATIONIZED HYDROXYPROPYL CELLULOSE REPRESENTED BY THE FOLLOWING FORMULA (1), WHEREIN R1, R2 AND R3 EACH INDEPENDENTLY REPRESENT A SUBSTITUENT GROUP HAVING A CATIONIZED ETHYLENEOXY GROUP AND A PROPYLENEOXY GROUP, N REPRESENTS A NUMBER OF FROM 20 TO 5000 WHICH IS A NUMBER REPRESENTING THE AVERAGE POLYMERIZATION DEGREE OF ANHYDROGLUCOSE, AND THE SUBSTITUTION DEGREE OF THE CATIONIZED ETHYLENEOXY GROUP IS FROM 0.01 TO 3 AND THE SUBSTITUTION DEGREE OF THE PROPYLENEOXY GROUP IS FROM 0.01 TO 5, AND (C) WATER.

生物聚合物、生产生物聚合物的方法、生产纸的方法、生产纤维素的方法、生物聚合物的用途和产品

本发明涉及生物聚合物的生产，所述生物聚合物在造纸法中可作为添加剂应用，旨在改善其在生产纤维素的方法中的物理和机械特性，促进其干燥过程，同时当被加工时赋予和以上对纸生产所提到的相同特性。本发明还涉及生产所述生物聚合物的方法、造纸法、生产纤维素的方法、所述生物聚合物的用途和包含所述生物聚合物的产品。

一种提高阳离子纳米纤维素制备效率的方法

本发明涉及到一种提高阳离子纳米纤维素制备效率的方法，首先通过以提高纤维表面羧基含量为目的的预处理代替传统阳离子化法中的碱预处理制备阳离子纤维素，然后利用机械研磨法对所得到的阳离子纤维素进行纳纤化处理得到阳离子纳米纤维素。与碱预处理相比，提高羧基含量的预处理法有效提高了纤维的润胀性能并增加反应中羟基可及度，从而达到提高纤维素阳离子化反应效率目的，进而达到提高阳离子纳米纤维素制备效率目的。

一种聚阴离子纤维素的制备方法

本发明公开了一种聚阴离子纤维素的制备方法，涉及化学材料技术领域，步骤S1、纤维素的溶解：将木浆纤维素倒入反应器中进行搅拌，同时喷淋四丁基氢氧化铵‑硫单质水溶液，得到可溶性纤维素溶液；步骤S2、醚化：向可溶性纤维素溶液中分批加入一氯乙酸醇溶液，控制反应中pH值范围，反应温度和反应时间，得到醚化混合物；步骤S3、交联反应：先将醚化混合物pH调节至6.5‑8.0，然后加入2‑6％的钛酸钠交联溶液，钛酸钠与纤维素中的醇羟基发生微交联反应，得到微交联混合物；步骤S4、再生与洗涤：用盐酸溶液将微交联混合物调节至中性，再生后通过抽滤除去溶剂，烘干干燥、粉碎得到聚阴离子纤维素粉末。

高粘度のカルボキシメチルセルロースリチウムの調製方法および使用

Eljárás cellulózszármazékok előállítására

A találmány tárgya eljárás ammóniaexplózióval aktivált cellűlózelőállítására. Ebben az eljárásban a) a celűlózt alkáliőldattalimpregnálják; b) az impregnált cellűlózt tetszőleges mértékbenkipréselik; és c) a cellűlózt szűbsztitúciós vagy addíciós reakcióbaviszik, s így DS szűbsztitúciós főkú cellűlózszármazékőt kapnak. Azeljárásra jellemző, hőgy ammóniával aktivált cellűlózt alkalmaznak, ésa c) lépés kezdetén az alkálinak az AHG-hőz (anhidrőglükóz-egységhez)viszőnyítőtt mőláris aránya a cellűlózban a DS kétszeresét nem haladjameg. Az alkalmazőtt alkáliőldat kőncentrációja körülbelül 12 tömeg%vagy ennél kisebb. Az eljárás előnyei: az ammóniaexplóziókövetkeztében a cellűlóz szerkezete fellazűl, és az alkálilúg számárakönnyen hőzzáférhetővé válik, így az alkáli-cellűlóz képződése azeddiginél könnyebb és teljesebb, s így a cellűlóz-alkálisó képződésehőmőgénebb körülmények között megy végbe. Az eljárás különlegeselőnye, hőgy szűbsztöchiőmetrikűs arányban alkalmazőtt alkálilúggal ismegvalósítható. A fenti tényezők következtében a termék egységesebb, ahőzamők jőbbak, a gyártási költségek alacsőnyabbak. Ehhez járűlnak akörnyezetvédelmi szempőntők: a találmány példáűl lehetővé teszicsekélyebb mennyiségű szennyvíz képződését és tisztítását. ŕ

타정용 히드록시알킬알킬셀룰로오스 및 이것을 포함하는 고형 제제

본 발명은 저첨가량으로 성형성이 우수하고, 붕괴성을 현저하게 지연시키지 않는 히드록시알킬알킬셀룰로오스, 이것을 포함하는 고형 제제 및 고형 제제의 제조 방법을 제공한다. BET법으로 측정한 비표면적이 0.5 내지 5.0㎡/g인 타정용 히드록시알킬알킬셀룰로오스 및 이것을 적어도 포함하는 고형 제제를 제공한다. 또한, 펄프를 알칼리 금속 수산화물 용액과 접촉시켜 알칼리셀룰로오스를 얻는 공정과, 얻어진 알칼리셀룰로오스를 에테르화제와 반응시켜 제1 히드록시알킬알킬셀룰로오스를 얻는 공정과, 분쇄 공정과, 분쇄된 제1 히드록시알킬알킬셀룰로오스를, 산 촉매를 사용한 가수분해 또는 산화제를 사용한 산화 분해에 의해 해중합하여 제2 히드록시알킬알킬셀룰로오스를 얻는 공정을 적어도 포함하는 타정용 히드록시알킬알킬셀룰로오스의 제조 방법 등을 제공한다.