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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 33. Отображено 33.
12-05-2023 дата публикации

Preparation method of printed carpet adhesive

Номер: CN116102994A
Автор: SHI XIAODAN, ZHANG FANGFANG, YIN DONGHUA
Принадлежит:

The invention provides a preparation method of a printed carpet adhesive, which comprises the following steps: adding an aqueous solution of an emulsifier A, an emulsifier B and an initiator and a mixed solution of a crosslinking monomer, an acrylate monomer and a carboxylic acid monomer into a first tubular reactor to prepare a homogeneous emulsion; and adding the homogeneous emulsion into a second tubular reactor to carry out polymerization reaction, cooling the material obtained after the reaction is finished, adjusting the pH value to 6-9 by using an alkaline substance, and filtering to obtain the printed carpet adhesive. According to the invention, the materials are premixed at a high speed under a certain motor frequency by adopting a continuous feeding and discharging mode to prepare a homogeneous emulsion, and then the homogeneous emulsion reacts in the tubular reactor. The material retention time is short, the obtained product is high in conversion rate, fine in granularity, lower ...

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Номер записи: 1
04-07-2023 дата публикации

Modified full-biodegradable mulching film with fertilizer effect and preparation method of modified full-biodegradable mulching film

Номер: CN116376242A
Автор: SHI XIAODAN, ZHEN XIAOYU, JIN XIACHAO
Принадлежит:

The modified full-biodegradable mulching film with the fertilizer effect is characterized in that the raw materials comprise the following components in parts by weight: 60-100 parts of biodegradable resin, 5-30 parts of modified lignin, 0-10 parts of mineral powder and 2-15 parts of auxiliaries, wherein the modified lignin is phosphonic acid compound ethylenediamine lignin. The preparation method comprises the following steps: mixing the raw materials, carrying out extrusion granulation, and carrying out co-extrusion film blowing molding on particles to obtain the modified full-biodegradable mulching film with the fertilizer effect. The modified full-biodegradable mulching film with the fertilizer effect, which is prepared by the method, has the following advantages that lignin which is wide in source, low in price and easy to obtain is added, so that efficient utilization of resources is realized; and the modified mulching film has the advantages of good toughness, good tensile property ...

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Номер записи: 2
16-05-2023 дата публикации

Biodegradable master batch and preparation method thereof

Номер: CN116120720A
Автор: SHI XIAODAN, XU LI, JIN XIACHAO
Принадлежит:

The invention discloses a biodegradable master batch and a preparation method thereof, and is characterized in that the biodegradable master batch comprises the following raw materials by weight: 20-80 parts of biodegradable resin PBAT, 0-40 parts of biodegradable resin PLA, 0.5-50 parts of lignin, 0.5-10 parts of a modified monomer, 0.2-5 parts of a cross-linking agent, and 1-10 parts of a processing aid; the specific preparation method comprises the following steps: 1, adding the degradable resin PBAT, the degradable resin PLA, the lignin, the modified monomer, the cross-linking agent and the processing aid into a high-speed mixer according to a ratio, and uniformly mixing to obtain a primary mixed material; and 2, adding the primarily mixed material into a parallel twin-screw extruder, and shearing and plasticizing to obtain the biodegradable master batch. The lignin and the degradable resin PBAT and PLA are modified in the melt blending process by using the cross-linking agent and the ...

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Номер записи: 3
18-07-2023 дата публикации

Beta-nicotinamide mononucleotide and preparation method thereof

Номер: CN116444581A
Автор: SHI XIAODAN, JIN XIACHAO
Принадлежит:

The invention provides a beta-nicotinamide mononucleotide and a preparation method thereof. The beta-nicotinamide mononucleotide is prepared from the following raw materials: a first solvent, a solid superacid catalyst, nicotinate, tetraacetyl-D-ribose, a second solvent, liquid ammonia, a third solvent and a phosphate esterification auxiliary agent, the first solvent comprises one or a combination of several of dichloromethane, 1, 2-dichloroethane, chloroform, tetrahydrofuran, acetonitrile and 1, 4-dioxane; the second solvent comprises one or a combination of more of methanol, ethanol, tetrahydrofuran and dimethylformamide; the third solvent is prepared from one or a combination of more of trimethyl phosphate, triethyl phosphate, tripropyl phosphate, tributyl phosphate, tetrahydrofuran, acetonitrile and 1, 4-dioxane. According to the beta-nicotinamide mononucleotide and the preparation method thereof disclosed by the invention, the reaction time can be effectively shortened, the production ...

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Номер записи: 4
09-06-2023 дата публикации

Hemicellulose-based PVA (polyvinyl alcohol) bobbin adhesive and preparation method thereof

Номер: CN116239969A
Автор: SHI XIAODAN, LI YAN, JIN XIACHAO
Принадлежит:

The hemicellulose-based PVA bobbin adhesive is prepared from the following raw materials in parts by mass: 0.04 to 0.1 part of hemicellulose, 0.02 to 0.05 part of polyvinyl alcohol, 0.01 to 0.03 part of a catalyst, 0.12 to 0.20 part of kaolin, 0.0005 to 0.002 part of a cross-linking agent, 0.01 to 0.03 part of pulping waste liquid, 0.0001 to 0.0005 part of a de-foaming agent and 0.7 to 0.8 part of water. The invention also provides a preparation method of the hemicellulose-based PVA bobbin glue. According to the invention, renewable non-toxic and harmless hemicellulose is used for replacing a part of PVA, so that the adhesion force of the PVA adhesive in paper tube adhesion is improved, and meanwhile, the adhesive has proper water retention and viscosity; the color of the bobbin glue is closer to the color of pre-bobbin body paper by utilizing the alkalinity of the pulping waste liquid and the composition characteristics of the raw materials, and the non-toxic and harmless bobbin glue with ...

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Номер записи: 5
02-06-2023 дата публикации

Preparation method of alkenyl succinic anhydride

Номер: CN116199653A
Автор: SHI XIAODAN, WU GUOLING, YIN DONGHUA
Принадлежит:

The invention discloses a preparation method of alkenyl succinic anhydride, which comprises the following steps: pumping olefin in a raw material into a synthetic reaction kettle through a metering pump, introducing nitrogen for protection, adding a catalyst and an antioxidant, starting stirring, and heating to 180-220 DEG C; adding maleic anhydride into the hot melting kettle, introducing steam, heating to 70 DEG C, and stirring for later use after the materials are completely melted; dropwise adding the maleic anhydride melted in the step 2) into the synthetic reaction kettle, wherein the dropwise adding temperature is 180-220 DEG C; after dropwise adding, reacting at the reaction temperature of 180-250 DEG C; the reaction product is put into a short-path molecular distiller, light components are removed, the reaction product is recycled as a raw material, and the remaining fraction is alkenyl succinic anhydride. According to the preparation method of the alkenyl succinic anhydride, by ...

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Номер записи: 6
03-01-2014 дата публикации

STYRENE-ACRYLIC EMULSION AND PREPARATION METHOD AND USE THEREOF

Номер: WO2014000655A1
Автор: SHI, Xiaodan, ZHOU, Haibo
Принадлежит:

Disclosed are a styrene-acrylic emulsion, and the preparation method and use thereof; the preparation process comprises the following steps (1): mixing an initiator at 10-50% of the total weight, an emulsifier at 10-40% of the total weight, and water at 5-30% of the total weight to uniformity, then adding a mixed monomer at 50-80% of the total weight, so as to obtain a homogenous emulsion A; the mixed monomer consisting of (meth)acrylate, (methyl)styrene and (meth)acrylic acid; (2) reacting an acrylic acid resin, the remaining initiator, the remaining emulsifier, the remaining mixed monomer, and the remaining water for 0.5-1.0 hour, then dropwise adding an epoxy functional monomer and the homogenous emulsion A, reacting, and neutralizing with a basic material so as to obtain the styrene-acrylic emulsion. The weight solid content of the prepared styrene-acrylic emulsion is 30-50%; the pH value is 6-9; and the average particle size is 110-200 nm.

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Номер записи: 7
06-06-2023 дата публикации

Surface sizing agent with core-shell structure and preparation method thereof

Номер: CN116217814A
Автор: SHI XIAODAN, XIE ZHONGYI, YIN DONGHUA
Принадлежит:

The invention provides a preparation method of a core-shell structure surface sizing agent, which comprises the following steps: mixing a polymer emulsifier, water and a part of mixed monomer consisting of (methyl) styrene and (methyl) acrylate monomers, heating to 80-90 DEG C, adding a part of initiator, and reacting for 1-2 hours to synthesize a core emulsion; continuously dropwise adding the rest of the mixed monomer, the initiator, the organic siloxane and the functional monomer for 2-3 hours, continuously reacting for 1-2 hours after dropwise adding is completed, cooling and discharging; the organosiloxane does not contain vinyl organosiloxane, and the functional monomer is selected from at least one of propionic acid, acrylic acid-2-hydroxyethyl ester, acrylic acid-2-hydroxypropyl ester, methacrylic acid, acrylamide and N-hydroxymethyl acrylamide. The latex particles with the core-shell structure can give consideration to film forming and water resistance of the surface sizing agent ...

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Номер записи: 8
23-06-2023 дата публикации

Bio-based surface sizing agent and preparation method thereof

Номер: CN116289312A
Автор: SHI XIAODAN, LI YAN, JIN XIACHAO
Принадлежит:

The bio-based surface sizing agent is characterized by being prepared from the following components in parts by weight: 1 part of hemicellulose, 0.1 to 0.2 part of a chain extender, 0.05 to 0.2 part of a cross-linking agent, 0.1 to 0.2 part of hydrophobic small molecules, 0.015 to 0.05 part of polyvinyl alcohol, 0.2 to 0.5 part of isocyanate and 1.5 to 5 parts of water. The surface sizing aid disclosed by the invention is good in water resistance, and can effectively improve the ring crush compression resistance of the corrugating base paper.

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Номер записи: 9
30-12-2021 дата публикации

BIODEGRADABLE MATERIAL, AND RAW MATERIAL COMPOSITION, PREPARATION METHOD, AND APPLICATION OF BIODEGRADABLE MATERIAL

Номер: WO2021258760A1
Автор: SHI, Quentin, ZHAI, Yanrong, JIN, Xiazhao
Принадлежит:

Disclosed are a biodegradable material, and a raw material composition, a preparation method, and an application of the biodegradable material. The raw material composition of the biodegradable material comprises the following components in parts by weight: 100 parts of poly(butylene-adipate-co-terephthalate), 14.2-100 parts of polylactic acid, 14.2-100 parts of hemicellulose, 14.3-50 parts of starch, and 2.8-37.5 parts of an additive, wherein the additive comprises one or more of 0.7-5 parts of a cross-linking agent, 1.4-20 parts of a plasticizer, and 0.7-7.5 parts of a lubricant, and the cross-linking agent is one or more of dicumyl peroxide, benzoyl peroxide, and 2,5-dimethyl-2,5-di-(tert-butylperoxy)hexane. The biodegradable material and a product thereof can be completely degraded in nature, without polluting the environment; hemicellulose and starch are added into a biodegradable resin, and thus, the cost is reduced, and the mechanical properties of the product are improved; the application ...

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Номер записи: 10
06-06-2023 дата публикации

Preparation method of carboxylic butadiene-acrylonitrile latex

Номер: CN116217821A
Автор: SHI XIAODAN, ZHANG FANGFANG, YIN DONGHUA
Принадлежит:

The invention provides a preparation method of carboxylic butadiene-acrylonitrile latex, which comprises the following steps: adding an aqueous solution of an emulsifier, an initiator, a reaction aid and a polybutadiene emulsion and a mixed solution of an acrylate monomer, acrylonitrile and a carboxylic acid monomer into a first tubular reactor to prepare a homogeneous emulsion; the homogeneous emulsion sequentially passes through a second tubular reactor and a third tubular reactor to be subjected to polymerization reaction, the temperature of the second tubular reactor is set to be 30-60 DEG C, the material retention time is set to be 30-90 min, the motor power is set to be 5-15 Hz, the temperature of the third tubular reactor is set to be 60-70 DEG C, the material retention time is set to be 5 min, and the motor power is set to be 5-15 Hz; and after the reaction is finished, cooling the obtained material, adjusting the pH value to 6-9 by using an alkaline substance, and filtering to ...

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Номер записи: 11
04-07-2023 дата публикации

Preparation method of pulping auxiliary agent

Номер: CN116377751A
Автор: SHI XIAODAN, LI MINGLONG, JIN XIACHAO
Принадлежит:

The invention provides a pulping auxiliary agent, and a preparation method thereof comprises the following steps: adding amino-terminated polyether D-230, phosphorous acid and water into a reactor, and uniformly stirring; adding inorganic acid into the reactor, and heating to 100-110 DEG C; continuously adding formaldehyde into the reactor, refluxing for 3-5 hours, and cooling to normal temperature; and adding a chelating agent and a scale inhibitor into the reactor, adjusting the pH value, uniformly stirring, and discharging. The pulping auxiliary agent provided by the invention is safe, environment-friendly and low in production cost, can effectively inhibit too fast decomposition of hydrogen peroxide in the pulping and bleaching process so as to reduce the use amount of hydrogen peroxide, can be matched with hydrogen peroxide for use to achieve the purpose of synergistically enhancing the bleaching effect, and can effectively delay the scaling problem of production pipeline equipment ...

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Номер записи: 12
30-03-2017 дата публикации

METHOD FOR PREPARING FOUR-ARM STAR-SHAPED STRUCTURE HIGH EFFICIENCY HEAVY CALCIUM CARBONATE GRINDING DISPERSANT, PRODUCT AND USE THEREOF

Номер: WO2017049750A1
Автор: SHI, Xiaodan, SHAO, Wei, JIN, Xiazhao
Принадлежит:

The present invention discloses a method for preparing a four-arm star-shaped structure high efficiency heavy calcium carbonate grinding dispersant, comprising the following steps: (1) adding pentaerythritol and 4-cyano-4-dithiobenzoyloxypentanoic acid to a solvent, then adding DCC as the water absorbent and DMAP as the catalyst, and after the reaction, obtaining a four-arm RAFT chain transfer agent pentaerythritol tetra(4-cyano-4-dithiobenzoyloxyvalerate) by means of concentrating and separating; (2) adding a vinyl carboxylic acid monomer, pentaerythritol tetra(4-cyano-4-dithiobenzoyloxyvalerate) and an initiator, purging with nitrogen at a low temperature for a certain period of time, and sealing; (3) heating to start a reaction; (4) removing the solvent by distillation after the reaction is finished; (5) adding one or more alkali solutions for neutralization to adjust the PH of the system to 5~8, adding water to adjust the solid content to 20%~50%, to obtain the high efficiency heavy ...

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Номер записи: 13
23-06-2023 дата публикации

Fulvic acid modified furan resin and preparation method thereof

Номер: CN116284637A
Автор: SHI XIAODAN, FU KE, JIN XIACHAO
Принадлежит:

The invention provides fulvic acid modified furan resin and a preparation method thereof. The fulvic acid modified furan resin is prepared from the following raw material components: furfuryl alcohol, urea, formaldehyde and fulvic acid. The preparation method of the fulvic acid modified furan resin comprises the following steps: adjusting the pH value of formaldehyde to 8-10 by using alkali, and adding a first part of urea for reaction to obtain a first reaction solution; mixing the first reaction solution, fulvic acid and a first part of furfuryl alcohol, adjusting the pH value of the mixed solution to 3-5.5 with acid, carrying out a primary reaction, and adding a second part of furfuryl alcohol for a reaction to obtain a second reaction solution; and carrying out vacuum dehydration on the second reaction liquid, reducing the temperature, adding the balance of furfuryl alcohol and the balance of urea, and carrying out hot mixing to prepare the fulvic acid modified furan resin. The content ...

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Номер записи: 14
25-08-2023 дата публикации

Intercalated hydrotalcite stable AKD emulsion and preparation method thereof

Номер: CN116641256A
Автор: SHI XIAODAN, QIAO PENG, YIN DONGHUA
Принадлежит:

The invention provides an intercalated hydrotalcite-stabilized AKD (Alkyl Ketene Dimer) emulsion, which consists of AKD wax powder, an intercalated hydrotalcite aqueous solution, zirconium oxychloride and an iron-free aluminum sulfate aqueous solution, the mass ratio of the AKD wax powder to the intercalated hydrotalcite is (10-20): 1, the mass ratio of the AKD wax powder to the zirconium oxychloride is (50-65): 1, the mass ratio of the AKD wax powder to the iron-free aluminum sulfate is (10-30): 1, and the mass ratio of the iron-free aluminum sulfate aqueous solution to the intercalated hydrotalcite aqueous solution is (10-20): 1. The intercalated hydrotalcite is selected from sodium lignin sulfonate intercalated hydrotalcite or sodium dinaphthyl methane disulfonate intercalated hydrotalcite. The preparation method of the intercalated hydrotalcite-stabilized AKD emulsion comprises the following steps: adding zirconium oxychloride and molten AKD into an intercalated hydrotalcite aqueous ...

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Номер записи: 15
18-06-2020 дата публикации

BIODEGRADABLE PRODUCT AND PREPARATION METHOD THEREFOR

Номер: WO2020119158A1
Автор: SHI, Xiaodan, HAO, Lufeng, ZHENG, Lu
Принадлежит:

A biodegradable product and a preparation method therefor, the composition in parts by weight being as follows: 40-90 parts of a biodegradable resin; 5-50 parts of papermaking waste; 0-40 parts of starch; 0-5 parts of inorganic mineral; 2-15 parts of additive.

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Номер записи: 16
04-04-2023 дата публикации

Preparation method of modified lignin

Номер: CN115895288A
Автор: SHI XIAODAN, SUN HAIQIANG, JIN XIACHAO
Принадлежит:

The invention relates to a method for modifying lignin, which is characterized by specifically comprising the following steps: (1) adding lignin/lignin derivative with a certain particle size and montmorillonite into ultramicro equipment, and stirring for a certain time at a certain rotating speed and temperature; (2) slowly dropwise adding a silane coupling agent, and continuously reacting for a certain time to obtain modified lignin; the lignin/lignin derivative composite material is prepared from the following components in parts by mass: 100 parts of lignin/lignin derivative, 70 to 90 parts of montmorillonite and 8 to 16 parts of silane coupling agent. According to the scheme, the lignin agglomeration phenomenon is solved, more groups of the lignin are exposed, the dispersing performance of the lignin in rubber is improved, and meanwhile, when the modified lignin is applied to a rubber additive, the strength of the rubber can be remarkably improved.

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Номер записи: 17
07-04-2023 дата публикации

Chlorine-free cation dispersed rosin size and preparation method thereof

Номер: CN115928491A
Автор: SHI XIAODAN, TIAN JIAN, YIN DONGHUA
Принадлежит:

The invention provides a preparation method of chloride-free cation dispersed rosin size. The preparation method comprises the following steps: fully pre-emulsifying modified rosin liquid and a compound emulsifier, homogenizing at high pressure by a homogenizer, cooling, adding aluminum salt and a defoaming agent, and uniformly mixing to obtain the chloride-free cation dispersed rosin size, the compound emulsifier comprises an emulsifier A and an emulsifier B. The emulsifier A is formed by copolymerization of dimethyl diallyl ammonium chloride, acrylamide, dimethylamino ethyl methacrylate and diallyl amine acetate. And the emulsifier B is selected from at least one of nonylphenol polyoxyethylene ether, iso-tridecanol polyoxyethylene ether, polyoxyethylene sorbitan monooleate and polyoxyethylene sorbitan monostearate. The cationic dispersed rosin size prepared by compounding the polymer emulsifier synthesized by the microchannel reactor with other emulsifiers has good chemical stability, ...

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Номер записи: 18
11-07-2023 дата публикации

Styrene-butadiene emulsion and preparation method thereof

Номер: CN116410386A
Автор: SHI XIAODAN, YIN DONGHUA
Принадлежит:

The method comprises the following steps: weighing raw materials in proportion, preparing an aqueous solution of a mixture, enabling the aqueous solution to enter a microchannel reactor at the temperature of 80-120 DEG C, carrying out free radical emulsion copolymerization for 10-120 seconds, adjusting the pH value of a reaction product to 6-9 by using an alkaline substance, and filtering to obtain the styrene-butadiene emulsion, the raw materials comprise a seed emulsion, a carboxylic acid monomer, butadiene, (methyl) styrene, a molecular weight regulator, an anionic emulsifier, a nonionic emulsifier and an initiator. The invention also provides the styrene-butadiene emulsion prepared by the method. The micro-channel reactor is used for emulsion polymerization, and compared with a kettle type reaction, the micro-channel reactor has the advantages of being high in reaction speed, high in production efficiency and high in safety coefficient; when the obtained product is used in papermaking ...

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Номер записи: 19
07-04-2023 дата публикации

Full-biodegradable filling master batch as well as preparation method and application thereof

Номер: CN115926392A
Автор: SHI XIAODAN, ZHEN XIAOYU, JIN XIACHAO
Принадлежит:

The invention provides a full-biodegradable filling master batch which comprises the following components in parts by weight: 20-40 parts of biodegradable resin, 20-60 parts of modified lignin, 10-20 parts of carbon black, 5-15 parts of mineral powder and 2-15 parts of an auxiliary agent, and the modified lignin is a lignin polymer modified by copolymerization of lignin and acrylate. The preparation method comprises the following steps: fully and uniformly mixing the components, blending and banburying by a double-rotor internal mixer, and then conveying an uncooled semi-finished product to a double-screw extruder for extrusion and granulation to obtain the full-biodegradable filling master batch. The full-biodegradable filling master batch is applied to preparation of a mulching film, can effectively improve the tensile strength and elongation of the mulching film, improves the smoothness of the mulching film, reduces the crystal point of the mulching film, and prolongs the service life ...

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Номер записи: 20
30-05-2023 дата публикации

Preparation method of modified lignin and application of modified lignin in natural rubber

Номер: CN116178976A
Автор: SHI XIAODAN, SUN HAIQIANG, JIN XIACHAO
Принадлежит:

The invention relates to a method for improving dispersion of lignin in natural rubber, which is characterized by comprising the following specific steps: (1) crushing the lignin and then controlling the particle size D50 of the lignin to be less than 10 mu m and the particle size D100 to be 70 mu m; (2) mixing a certain amount of rubber additive process oil with a certain amount of lignin at a certain temperature for a certain time until the rubber additive process oil and the lignin are in a uniform paste state to obtain modified lignin; wherein the mass parts of the lignin and the process oil are as follows: 10 to 40 parts of the lignin and 10 to 30 parts of the process oil. The method provided by the invention can overcome the difficulty of poor dispersion effect of lignin series products in natural rubber, is simple and easy to obtain, and makes full use of the physical and chemical properties among the materials to result the difficulty in the processing process.

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Номер записи: 21
02-06-2023 дата публикации

Additive for formaldehyde-free floor adhesive and preparation method thereof

Номер: CN116200142A
Автор: SHI XIAODAN, ZHANG YING, JIN XIACHAO
Принадлежит:

The invention discloses an additive for a formaldehyde-free floor adhesive, which comprises the following components in parts by weight: 100-150 parts of dry powder of papermaking waste; 1-30 parts of a cross-linking agent; 1-6 parts of a catalyst; 200 to 500 parts of water; the catalyst is an alkaline compound. The papermaking waste can be used after being modified and processed to replace flour and the formaldehyde-free adhesive to be mixed, the cost can be reduced, the purpose of efficient utilization of biomass resources is achieved, and the produced formaldehyde-free floor is high in bonding strength, low in formaldehyde emission, safe and environmentally friendly.

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Номер записи: 22
14-04-2023 дата публикации

Maleic anhydride-acrylic acid copolymer papermaking chelating agent and preparation method thereof

Номер: CN115960292A
Автор: SHI XIAODAN, LI MINGLONG, JIN XIACHAO
Принадлежит:

The raw materials of the maleic anhydride-acrylic acid copolymer papermaking chelating agent mainly comprise the following components in parts by mass: 10-50 parts of maleic anhydride, 60-120 parts of water, 30-70 parts of acrylic acid, 0.1-0.5 part of an initiator, 1-10 parts of a chelating agent and 0.5-5 parts of a builder. The invention also provides a preparation method of the maleic anhydride-acrylic acid copolymer papermaking chelating agent. The use amount of the hydrogen peroxide in the pulping and bleaching process of the papermaking chemi-mechanical pulp can be effectively reduced, the bleaching effect can be synergistically enhanced by matching with the hydrogen peroxide, and meanwhile, the scaling problem of production pipeline equipment is effectively delayed.

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Номер записи: 23
11-04-2023 дата публикации

Pulping and bleaching aid and preparation method thereof

Номер: CN115947900A
Автор: SHI XIAODAN, LI MINGLONG, JIN XIACHAO
Принадлежит:

A preparation method of the pulping and bleaching aid comprises the following steps: adding sodium polyepoxysuccinate and a proper amount of water into a reactor, stirring and heating to 75-85 DEG C; adding an initiator into the reactor, stirring and preserving heat for 0.5-1 hour; adding a mixed solution of acrylic acid and sodium allyloxy hydroxypropyl sulfonate; stirring for 4 to 6 hours; and cooling to room temperature, adding a proper amount of chelating agent and stabilizing agent, and adjusting the pH value to obtain the pulping and bleaching auxiliary agent. The novel pulping and bleaching aid is safe, environmentally friendly and low in production cost, ineffective decomposition of hydrogen peroxide in the pulping and bleaching process can be effectively inhibited, the use amount of the hydrogen peroxide is reduced, and the bleaching effect can be synergistically enhanced when the novel pulping and bleaching aid is used in cooperation with the hydrogen peroxide.

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Номер записи: 24
07-04-2023 дата публикации

Method for preparing lignin asphalt emulsifier from sulfate pulping waste liquid

Номер: CN115926191A
Автор: SHI XIAODAN, ZHAO JI, JIN XIACHAO
Принадлежит:

The invention discloses a method for preparing a lignin asphalt emulsifier by using sulfate pulping waste liquid, which is characterized by specifically comprising the following steps: (1) filtering the sulfate pulping waste liquid by using a filter membrane to obtain a concentrated solution rich in lignin, and recording the concentrated solution as a material A; (2) adding the material A, a trimethylamine solution, epoxy chloropropane and inorganic acid into a first tubular reactor, reacting at 60-100 DEG C for 30 seconds to 5 minutes, and recording a reaction product as a material B; and (3) adding the material B, a methylation reagent and an organic tin additive into a second tubular reactor, and continuously reacting at 100-150 DEG C for 30 seconds to 5 minutes to prepare the lignin asphalt emulsifier C. The tubular reactor is adopted, the mass transfer process is enhanced, the lignin amination time is greatly shortened, the reaction efficiency is improved, meanwhile, the volume of ...

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Номер записи: 25
05-05-2023 дата публикации

Modified papermaking lubricant and preparation method thereof

Номер: CN116065420A
Автор: SHI XIAODAN, SHEN ANCHENG, YIN DONGHUA
Принадлежит:

The invention provides a modified papermaking lubricant which is prepared by mixing fatty acid, epichlorohydrin, a catalyst, an inorganic modifier, a silk fibroin derivative, a glidant, alkali, a bactericide and water and then carrying out polymerization reaction, the invention relates to a silk fibroin finishing agent which comprises the following components in parts by weight: 100 parts of fatty acid, 15-25 parts of epichlorohydrin, 0.2-0.4 part of a catalyst, 15-25 parts of an inorganic modifier, 5-20 parts of a silk fibroin derivative, 1-2 parts of a flow aid, 5-20 parts of alkali, 0.1-0.2 part of a bactericide and a proper amount of water, wherein the silk fibroin derivative is cross-linking agent modified silk fibroin. According to the invention, epichlorohydrin is adopted to graft and polymerize fatty acid, and a small amount of inorganic modifier and silk fibroin derivative are added into the system to prepare the lubricant, and the lubricant is applied to paper coating, can significantly ...

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Номер записи: 26
04-07-2023 дата публикации

Coal water slurry additive taking papermaking black liquor as raw material and preparation method of coal water slurry additive

Номер: CN116376608A
Автор: SHI XIAODAN, ZHANG YING, JIN XIACHAO
Принадлежит:

The preparation method comprises the following specific steps: (1) heating 100 parts by mass (dry weight) of the papermaking black liquid to 30-70 DEG C, adding 10-20 parts by mass of a sulfonating agent, uniformly stirring, then continuously heating to 70-100 DEG C, and keeping the temperature for 30-120 minutes; (2) cooling to 40-80 DEG C, adding 5-10 parts by mass of a catalyst and 5-10 parts by mass of a cross-linking agent, heating to 80-110 DEG C, and keeping the temperature for 10-90 minutes; and (3) cooling to 20-50 DEG C, adding 5-10 parts by mass of a catalyst, and drying the feed liquid to prepare the coal water slurry additive with the solid content of 85-100%. The additive is applied to the coal water slurry industry, the concentration and stability of the coal water slurry can be effectively improved, the transportation cost of the coal water slurry is reduced, and then the production efficiency is improved. In addition, the product mainly uses papermaking waste liquid, energy ...

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Номер записи: 27
07-04-2023 дата публикации

Preparation method of efficient coal water slurry additive

Номер: CN115926861A
Автор: SHI XIAODAN, ZHANG YING, JIN XIACHAO
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A preparation method of an efficient coal water slurry additive is characterized by comprising the following specific steps: (1) preheating 100 parts by mass (dry weight) of papermaking waste liquid to 70-90 DEG C, adding 10-15 parts by mass of a cross-linking agent, and keeping the temperature for 30-60 minutes; (2) adding 1-5 parts by mass of a catalyst, heating to 90-120 DEG C, and keeping the temperature for 30-60 minutes; (3) cooling to 60 DEG C, adding 20-40 parts by mass of naphthalene sulfonate formaldehyde polymer and 1-5 parts by mass of catalyst, and keeping the temperature for 30-60 minutes; (4) adding 10-15 parts by mass of hydroxymethyl cellulose, and adjusting the pH value to 12-13; and carrying out spray drying on the feed liquid to obtain the efficient coal water slurry additive. The coal water slurry additive prepared by the method disclosed by the invention has the characteristics of wide single use range, small addition amount, good stability of a coal water slurry product ...

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Номер записи: 28
14-04-2023 дата публикации

Special full-biodegradable double-layer mulching film for rice and preparation method thereof

Номер: CN115958865A
Автор: SHI XIAODAN, ZHEN XIAOYU, JIN XIACHAO
Принадлежит:

A full-biodegradable double-layer mulching film special for rice is characterized in that the mulching film comprises an inner-layer film and an outer-layer film, and the outer-layer film is prepared from, by weight, 85-100 parts of biodegradable resin and 5-15 parts of lignin; the inner-layer film is prepared from the following raw materials in parts by weight: 50 to 90 parts of biodegradable resin, 5 to 40 parts of lignin and 5 to 10 parts of calcium carbonate; wherein the raw material of the outer-layer film further comprises an auxiliary agent 1, and the raw material of the inner-layer film further comprises an auxiliary agent 2. The invention further provides a preparation method of the full-biodegradable mulching film special for rice. The full-biodegradable mulching film special for rice prepared by the method is wide in raw material source, green, environment-friendly, capable of being completely biodegraded and excellent in mechanical property; the product can effectively remove ...

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Номер записи: 29
06-06-2023 дата публикации

Biomass modified flocculant and preparation method thereof

Номер: CN116216890A
Автор: SHI XIAODAN, LI YAN, JIN XIACHAO
Принадлежит:

The invention provides a biomass modified flocculant and a preparation method thereof. The biomass modified flocculant comprises the following raw materials in parts by weight: 50-150 parts of a dissolving pulp hydrolysate concentrated solution, 10-20 parts of a cationic etherifying agent, 1-5 parts of an alkaline substance, 1-2 parts of an acidic substance, 0.5-2 parts of an initiator, 10-20 parts of acrylamide, 5-10 parts of a crosslinking monomer, 1-2 parts of a surfactant and 10-20 parts of an inorganic flocculant. The biomass modified flocculant provided by the invention is simple in formula and simple to prepare, integrates the advantages of an organic flocculant, an inorganic flocculant and a demulsifier, and has the advantages of small dosage, high flocculation efficiency, complete flocculation, low cost, no secondary pollution and the like.

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Номер записи: 30
07-04-2023 дата публикации

Natural polymer modified interlayer bonding glue and preparation method thereof

Номер: CN115926680A
Автор: SHI XIAODAN, YUAN CAN, JIN XIACHAO
Принадлежит:

The invention discloses a preparation method of natural polymer modified interlayer bonding glue. The natural polymer modified interlayer bonding glue is prepared from the following raw materials in parts by weight: 1 part of an oligosaccharide and monosaccharide mixture, 0.25 to 0.58 part of starch, 0.00019 to 0.012 part of an alkaline substance, 0.0092 to 0.0208 part of an oxidizing agent, 0.7308 to 1.2308 part of water and 0.0108 to 0.0138 part of guar gum. The invention also provides a preparation method of the natural polymer modified interlayer bonding glue. The interlayer bonding glue disclosed by the invention is simple in process, does not contain synthetic macromolecules and is low in cost, the main raw materials are renewable macromolecules which widely exist in the nature and are not staple food of human, the interlayer bonding glue has sustainability and degradability, and after the interlayer bonding glue is used for spraying paper, the interlayer bonding strength, ring crush ...

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Номер записи: 31
02-06-2023 дата публикации

Method for preparing modified lignin from papermaking waste liquid

Номер: CN116199904A
Автор: SHI XIAODAN, SUN HAIQIANG, JIN XIACHAO
Принадлежит:

The invention discloses a method for preparing modified lignin from papermaking waste liquid, which comprises the following steps: adding weighed papermaking waste liquid into a reaction kettle, heating to 60-80 DEG C, adding formaldehyde, and reacting for 40-100 minutes; raising the temperature to 80 DEG C to 100 DEG C, adding phenol, and reacting for 80 minutes to 160 minutes; after the reaction is completed, washing, suction filtration and drying are performed to prepare the modified lignin. The molecular weight of the modified lignin is relatively reduced, and the dispersion effect of the modified lignin in a rubber matrix is improved; the density of benzene rings of the modified lignin is increased, so that the modified lignin has a relatively strong reinforcing function and relatively good reaction activity in a rubber matrix, and the toughness is improved to a certain extent; the modified lignin replaces part of carbon black to serve as a filling material of the tire, so that the ...

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Номер записи: 32
21-07-2023 дата публикации

Method for simultaneously determining cellulose, hemicellulose and lignin in straw

Номер: CN116465785A
Автор: SHI XIAODAN, LI MINGMING, JIN XIACHAO
Принадлежит:

A method for simultaneously determining cellulose, hemicellulose and lignin in straw comprises the following steps: (1) crushing the straw, sieving, adding into a G3 sand core funnel, pickling, and filtering to obtain a first product; (2) washing the first product, drying, hydrolyzing with a sulfuric acid solution, and filtering to obtain supernate and filter residues; (3) washing the filter residue, and drying to obtain a first residue with the mass of m1; (4) ashing the first residue to obtain a second residue with the mass of m2; (5) preparing a phloroglucinol color developing agent to obtain an absorbance standard curve of total sugar and xylose; (6) determining the contents of glucose and xylose in the supernate by adopting a dual-wavelength visible spectrum method so as to obtain the contents of cellulose and hemicellulose; and (7) obtaining the amount of lignin according to (m1-m2). The method is simple in pretreatment, accurate in result and short in analysis time, can be used for ...

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Номер записи: 33