Liquid preparation containing copolymers containing halogen atoms and phosphonate groups

The copolymers containing halogen atoms and phosphonate groups present in the liquid preparations and comprising components (a), (b) and (c) have good flame-inhibiting properties. Components (a), (b) and (c) are defined precisely in Claim 1. The copolymers are employed in the form of aqueous dispersions or in organic solvents for coating and impregnating non-textile substrates.

Process for preparing cyclic acetals, and detergents and cleaners containing the same

Process for the preparation of aliphatic diesters of diaminoalkylphosphonic acid.

PESTICIDE.

Procedure for the production of 1,4-Dicyanbuten (2)

Process for preparing 3-aminomethyl-3,5,5-trimethyl-cyclohexylamine

HYDRATION CATALYSTS FOR THE PRODUCTION OF PROPANDIOLES AND METHOD FOR THE PRODUCTION OF PROPANDIOLES WITH SUCH CATALYSTS

METHOD FOR PRODUCING POLYOXYALKYLENE GLYCOLES

Procedure for the preparation of polyoxyalkyleneglycols

Process for the regulation of the average molecular weight distribution of polyoxyalkyleneglycols and derivatives of polyoxyalkylenes during the ringopening polymerisation of cyclic ethers and/or acetals catalysed by heteropolyacids

METHOD FOR PRODUCING (ALPHA) ALKYLACROLEINS

METHOD FOR PRODUCING (ALPHA) ALKYLACROLEINS

MEASURE THE GENERAL FORMULA MO (DOWN ARROW) 1 (DOWN ARROW) (DOWN ARROW) 2 (DOWN ARROW) (UP ARROW) P (UP ARROW) (DOWN ARROW) A (UP ARROW) V (UP ARROW) V (UP ARROW) (DOWN ARROW) B (DOWN ARROW) (UP ARROW) X (UP ARROW) (UP ARROW) 1 (UP ARROW) (DOWN ARROW) C (DOWN ARROW) (UP ARROW) X (UP ARROW) (UP ARROW) 2 (UP ARROW) (DOWN ARROW) D (DOWN ARROW) (UP ARROW) X (UP ARROW) (UP ARROW) 3 (UP ARROW) (DOWN ARROW) E (DOWN ARROW) (UP ARROW) S (UP ARROW) ( UP ARROW) B (UP ARROW) (DOWN ARROW) F (DOWN ARROW) (UP ARROW) R (UP ARROW) (UP ARROW) E (UP ARROW) (DOWN ARROW) G (DOWN ARROW) (UP ARROW) S ( UP ARROW) (DOWN ARROW) H (DOWN ARROW) (UP ARROW) O (UP ARROW) (DOWN ARROW) N (DOWN ARROW)

MOISTURE-HARDENING, STORAGE-STABLE, 1-COMPONENT POLYURETHANE SYSTEMS AND THEIR USE

PROCESS FOR REPRESENTING METHYL-TERT.-BUTYLAETHER

Process for the preparation of 2-methyl-2-alkenals

Prepn. of ethylene cyanohydrin from acrylonitrile and water - in presence of quat. ammonium hydroxide catalyst and formaldehyde, for use in prepn. of pharmaceuticals, plant protection agents, dyes, etc.

Prepn. of ethylene cyanhydrin comprises reacting water with acrylonitrile in the presence of quat. ammonium hydroxides as catalyst and HCHO. The resulting reaction mixt. can be hydrogenated with H2 in the presence of ammonia and hydrogenation catalysts without sepg. the ethylene cyanhydrin, to give 3-aminopropanol-(1) in good yields. Ethylene cyanhydrin, is an important intermediate in the prepn. of solvents, e.g. for cellulose lacquers, dyestuffs plant protection agents, pharmaceuticals and plastics. It is also a starting material for the prepn. of plasticisers for PVC or the extraction of aromatics from crude oil.

New 2,2-di:substd. pentane-1,5-di:amine(s), prepn. - by reaction of 2,2-di:substd. 4-cyano-butanal in two separate zones, first with ammonia then with hydrogen

Prepn. of 2,2-disubstd. pentane-1,5-diamines of formula (I) is claimed, some of which are claimed as novel cpds.. The prepn. of (I) is from 2,2-disubstd.-4-cyano-butanals of formula (II) by reaction in two separate zones such that (i) (II) is treated at 20-150 deg.C/15-500 bar with an excess of ammonia in presence of an acidic heterogeneous catalyst in a first reaction zone; and (ii) the prod. of step (i) is treated in a second reaction zone at 60-150 deg.C/50-500 bar with H2 in presence of an excess of ammonia using a Co-, Ni-, Ru and/or other noble metal-contg. catalyst opt. with basic components or on a basic or neutral carrier. In the formulae, R1 and R2 = are each. 1-10C alkyl or 2-10C alkenyl or together form a 4-7C alkylene chain opt. substd. by one to five 1-4C alkyl gps.. The novel claimed cpds. are of formula (I) with the proviso that R1 and R2 are not simultaneously Me, specifically claimed novel cpds. being 2-Me-2-n-propylpentane-1,5-diamine; and 2-nBu-2-ethylpentane- 1,5-diamine. USE/ADVANTAGE - On account of their high degree of substn., (I) are distinguished by (a) their reduced volatility in comparison to 2-Me- and 2,2-di-Me-pentanediamines and (b) their asymmetric amine functionality. (I) show low odour and can be converted to diisocyanates. (8pp Dwg.No.0/0)

Process for obtaining isobutene from mixtures of C4-hydrocarbons containing isobutene

Die vorliegende Erfindung betrifft ein Verfahren zur Gewinnung von Isobuten aus Isobuten enthaltenden C4-Kohlenwasserstoffgemischen durch Umsetzung des Gemisches mit einem primären Alkohol in Gegenwart eines sauren Kondensationsmittels und Zerlegung des gebildeten tertiären Äthers in Gegenwart eines sauren Katalysators bei erhöhten Temperaturen, bei dem man einen primären C3- oder C4-Alkohol verwendet. The present invention relates to a process for the recovery of isobutene from isobutene-containing C4-hydrocarbon mixtures by reacting the mixture with a primary alcohol in the presence of an acidic condensing agent and decomposing the tertiary ether formed in the presence of an acidic catalyst at elevated temperatures, in which a primary C3 - or C4 alcohol used.

Use of hydrogenation catalysts for the production of propanediols and process for the production of propanediols with such catalysts

METHOD FOR PRODUCING ALIPHATIC AND CYCLOALIPHATIC DI- AND POLYURETHANES

Process for the preparation of methylisobutylketone and isoprene

Process for the preparation of butanediol (1,3) -1-mono- (3'-hydroxybutyrates) and some of these butanediol- (1,3) -1-mono- (3'-hydroxybutyrates)

Process for the preparation of carbamates

1. A process for the preparation of a carbamate of the formula see diagramm : EP0083764,P5,F1 where R**1 is an aliphatic, cycloaliphatic or araliphatic radical or R**3-(OR**2)n -, R**2 is an aliphatic radical of not less than 2 carbon atoms, R**3 is an aliphatic, cycloaliphatic or araliphatic radical, and n is an integer, by reacting urea with an alcohol, wherein urea is reacted with an alcohol of the formula R**1-OH where R**1 has the above meaning, at not less than 140 degrees C and under not less than 2 bar, an inert gas being passed through the reaction mixture and the pressure during the reaction being so set that the reaction mixture boils.

Process for obtaining 2-alkyl-branched alkanals from alkanal mixtures

2-Alkyl-branched alkanals are obtained from mixtures which contain the 2-alkyl-branched alkanals besides n-alkanals, 3-alkylalkanals and/or other isomers, by… a) reacting the alkanal mixture with an aqueous formaldehyde solution in the presence of a secondary amine and of a carboxylic acid as catalyst,… b) separating off the aqueous phase with the catalyst and, where appropriate, unreacted excess formaldehyde, and… c) separating off the 2-alkyl-branched alkanals by distillation from the condensation products of the other alkanals with formaldehyde.

Process for the preparation of hexamethylene diisocyanate-1,6 and/or of the isomeric diisocyanates with 6 carbon atoms in the alkyl group

Process and catalyst for preparing methacrylic acid

Process for the preparation of p-alkylphenols

Process for the production of caprolactam.

Storage-stable polyisocyanate compositions obtainable by phosgene-free processes, a process for their preparation and their use

Process for the preparation of alpha-alkyl acroleins

Oximino phosphoric-acid derivatives, process for their preparation and their use as pesticides

Process for the preparation of mixtures of 3-aminopropionitrile and ethylene cyanhydrine

Process for the preparation of mixtures of 3-aminopropionitrile, of the formula I, H2N-CH2-CH2-CN (I> and ethylene cyanohydrin, of the formula II, HO-CH2-CH2-CN (II> by reacting bis(2-cyanoethyl) ether, of the formula III, NC-CH2-CH2-O-CH2-CH2-CN (III> with ammonia at temperatures from 50 to 200@C and pressures from 1 to 500 bar.

Process for the preparation of hexamethylene 1,6-diisocyanate by thermal cleavage of hexamethylene dialkyl urethanes

Method for the simultanous preparation of nitriles and acryl amide or methacryl amide

Method for the production of 5-formyl valeric acid esters

The preparation of 5-formylvaleric esters comprises the following steps… a) hydroformylation of pentenoic esters by reaction with carbon monoxide and hydrogen at elevated temperature and pressure in the presence of carbonyl complexes of metals from Group VIII of the Periodic Table with the formation of a mixture of 5-, 4- and 3-formylvaleric esters… b) separation of 5-formylvaleric esters from the mixture thus obtained of 5-, 4- and 3-formylvaleric esters, leaving a mixture substantially comprising 4- and 3-formylvaleric esters behind… c) cleavage of the mixture substantially comprising 4- and 3-formylvaleric esters to give pentenoic esters at a temperature of 50 to 400 DEG C in the presence of catalysts and… d) recycling of the pentenoic esters into step a.

METHOD FOR PRODUCING 3-AMINOMETHYL-3,5,5-TRIMETHYL-CYCLOHEXYLAMINE

Chlorinated phenol molecular cpd

The molecular cpd. of 1 mol. of 2,6-dimethyl-3,5-dichloro-benzoquinone and 2 mol of 2,6-dimethyl-3,4,5-trichlorophenol is produced in good yield and purity by reacting 2,6-dimethyl-4-t-butyl-phenol with SO2Cl2 at >50 degrees C. The product has fungicidal and insecticidal activity and can be used as a bactericide fungicide and wood-preservative.

3,4-DIHYDRO-2H-PYRANE

METHOD FOR THE PRODUCTION OF PENTENIC ACID ESTERS

PROCEDURE FOR THE ADJUSTMENT OF THE AVERAGE MOLECULAR WEIGHT OF POLYOXYALKYLENE GLYCOLS AND DERIVATIVES OF POLYOXYALKYLENE IN THE RING OPENING OF CYCLIC ETHERS AND / OR ACETALS CATALYZED WITH HETEROPOLIACIDES.

PROCEDIMIENTO PARA EL AJUSTE DEL PESO MEDIO MOLECULAR DE POLIOXIALQUILENOGLICOLES Y DERIVADOS DE POLIOXIALQUILENO EN LA POLIMERIZACION DE APERTURA DE ANILLO CATALIZADA POR HETEROPOLIACIDOS DE ETERES Y/O ACETATOS CICLICOS EN PRESENCIA DE COMPUESTOS QUE LIBERAN PROTONES, REGULANDO LA CANTIDAD QUE SE ENCUENTRA EN EL SISTEMA REACTIVO EN EL COMPUESTO CORRESPONDIENTE LIBERADOR DE PROTONES DURANTE EL CURSO DE LA TRANSFORMACION MEDIANTE LA MEDICION DE LA CONDUCTIVIDAD ELECTRICA. PROCEDURE FOR THE ADJUSTMENT OF THE AVERAGE MOLECULAR WEIGHT OF POLYOXYALKYLENE GLYCOLS AND DERIVATIVES OF POLYOXYALKYLENE IN THE ROLL OPENING POLYMERIZATION OF ETERES AND / OR CYCLIC ACETATES IN THE PRESENT OF COMPUTERS, PRESENT THE CORRESPONDING PROTON-RELEASING COMPOUND DURING THE COURSE OF TRANSFORMATION THROUGH THE MEASUREMENT OF ELECTRICAL CONDUCTIVITY.

METHOD FOR PRODUCING ARYLISOCYANATES BY THERMAL CLEAVING OF ARYLURETHANES

Process for preparing 2-substituted 4-acyloxy-2-butenals

Process for the preparation of methacrylic acid

Methacrylic acid is prepared by gas-phase oxidation of methacrolein, which is obtained by reaction of propanal with formaldehyde, with oxygen-containing gases in the presence of water vapour over catalysts containing molybdenum and phosphorus in oxidic form, in which the gas mixture contains less than 0.2% by weight of oxygen-containing and/or unsaturated organic compounds having more than 4 carbon atoms, relative to the methacrolein.

METHOD FOR THE COMMUNITY PRODUCTION OF 3-DIALKYLAMINOPROPIONITRILES, BIS- (2-CYANOETHYL) ETHER AND IF REQUIRED ETHYLENCYANHYDRINE

Catalytically active salt mixtures comprising a quaternary alkylammonium alkylcarbonate

Catalytically active salt mixtures in aprotic dipolar media contain a) a quaternary alkylammonium alkylcarbonate of the general formula I <IMAGE> in which the radicals R<1> to R<5> are an alkyl or cycloalkyl radical having 1 to 10 carbon atoms, it being possible for the radicals R<1> to R<5> to be identical or different, b) 1.0 to 1.5 molar equivalents, relative to component a, of an alkali metal hydrogen difluoride of the formula II MF . HF II, M being an alkali metal cation, and c) 0 to 15 molar equivalents, relative to component a), of an alkali metal fluoride MF, M being a cation of an alkali metal.

Process for making butyrolactones

PROCEDURE FOR OBTAINING ESTERS OF 6-AMINOCHAPRONIC ACID.

PROCEDIMIENTO PARA LA PRODUCCION DE ESFERES ACIDOS DE 6-AMINOCAPRONIOS MEDIANTE EL TRATAMIENTO DE ESFERES ALQUILOS DE ACIDOS 5-FORMILORDERIANIAS EN AMONIACO EN EXCESO E HIDROGENO, EN PRESENCIA DE CATALIZADORES DE HIDROGENACION A TEMPERATURA Y PRESION ELEVADA, SE CARACTERIZA PORQUE LA TRANSFORMACION EN AMONIACO LIQUIDO SE REALIZA EN PRESENCIA DE CATALIZADORES DE VOLENIO. PROCEDURE FOR THE PRODUCTION OF 6-AMINOCHAPRONIA ACID SPHERES THROUGH THE TREATMENT OF ALKYL SPHERES ACIDOS 5-FORMILORDERIANIAS IN AMMONIA IN EXCESS AND HYDROGEN, PORACIAI, LAURA, AND EASTATURA CARRIED OUT IN THE PRESENCE OF VOLENIUM CATALYSTS.

Process for the preparation of aminopropionitriles

Process for the preparation of aminopropionitriles of the general formula I <IMAGE> in which R denotes hydrogen or methyl, by reacting ammonia with acrylonitriles of the general formula II <IMAGE> in which the substituents have the abovementioned meanings, in a molar ratio of 1:1 to 500:1 on heterogeneous catalysts at temperatures from 40 to 180 DEG C and pressures from 10 to 350 bar.

Process for the preparation of 2,2-dimethyl-13-propanediolhydroxypivalic acid monoester

Transformation of 1,3-dioxanes into 4-oxa-aldehydes

4-Oxa-aldehydes of the formula …<IMAGE>… are prepared by catalytic isomerisation of 1,3-dioxanes by isomerising 1,3-dioxanes of the formula …<IMAGE>… in which the radicals R<1>, R<2>, R<4> and R<5> are identical to or different from one another and represent hydrogen, straight-chain or branched alkyl, alkenyl or alkynyl radicals having up to 18 carbon atoms, cycloalkyl or cycloalkenyl radicals having 5 to 8 carbon atoms, aryl, alkylaryl, aralkyl, aralkenyl or alkenylaryl radicals having 5 to 16 carbon atoms or represent heterocyclic radicals and furthermore the radicals R<1> and R<2> and/or R<4> and R<5> together with the carbon atoms to which they are bound can each form a cycloalkane, cycloalkene or a heterocycle, it being possible for the radicals mentioned to carry additional substituents which are inert under the reaction conditions and the radical R<3> denoting hydrogen or a straight-chain or branched alkyl radical, with the use of metal oxide catalysts which have been treated with acids and/or of silica phases having a zeolite structure.

DIALKYLTHIONOPHOSPHORIC ACID ESTER

Method for the production of methacrylic acid

Methacrylsäure kann durch Gasphasenoxidation von Methacrolein oder Isobutyraldehyd an Mo- und P-enthaltenden Katalysatoren bei 250 bis 400°C unter Abkühlen des heißen Reaktionsgases unter 100°C, Absorbieren der Methacrylsäure in einer mit Wasser betriebenen Absorptionskolonne bei Temperaturen unter 100°C und teilweisem Rückführen in den Oxidationsreaktor nach Zumischen von Methacrolein oder Isobutyraldehyd und Sauerstoff, mit Vorteil hergestellt werden, wenn man dem Reaktionsabgas in den unteren zwei Dritteln der Absorptionskolonne eine Menge an Methacrolein oder Isobutraldehyd, die der Menge des in der Reaktion verbrauchten Menge des Methacroleins oder Isobutyraldehyd gleich ist, zusammen mit Polymerisationsinhibitoren in flüssiger Form zufügt und aus dem Reaktionsabgas unterhalb der Zuführungsstelle des frischen Methacroleins bzw. Isobutyraldehyds oder nach der Absorptionskolonne einen Sitenstrom abzweigt, aus dem in einer mit Wasser bei Temperaturen unter 10°C betriebenen Waschkolonne das nicht umgesetzte Methacrolein bzw. Isobutyraldehyd ausgewaschen und als wäßrige Lösung auf den Kopf der Absorptionskolonne gegeben wird. Methacrylic acid can by gas phase oxidation of methacrolein or isobutyraldehyde over Mo- and P-containing catalysts at 250 to 400 ° C with cooling of the hot reaction gas below 100 ° C, absorption of the methacrylic acid in a water-operated absorption column at temperatures below 100 ° C and partial recycling in the oxidation reactor after admixing methacrolein or isobutyraldehyde and oxygen, can be produced with advantage if the amount of methacrolein or isobutaldehyde in the lower two thirds of the absorption column is equal to the amount of methacrolein or isobutyraldehyde consumed in the reaction , together with polymerization inhibitors in liquid form and branches off a site stream from the reaction exhaust gas below the feed point of the fresh methacrolein or isobutyraldehyde or after the absorption column, from which in a wash column ...

Process for the preparation of polyamine mixtures with a big portion of 4,4'-diamino-diphenyl methane

1. A process for the preparation of a polyamine mixture which contains not less than 50% by weight of diaminodiphenylmethanes, which in turn contain not less than 90% by weight of 4,4'-diaminodiphenylmethane of the formula I see diagramm : EP0043933,P6,F2 where the R's may be identical or different and each is hydrogen, halogen or an aliphatic radical, by reacting an aromatic amine with formaldehyde in the presence of a cation exchanger based on a styrene/divinylbenzene copolymer and prossessing sulfonic acid groups, wherein an aromatic amine of the formula II see diagramm : EP0043933,P6,F1 where R has the above meanings, is reacted in the presence of a styrene/divinylbenzene copolymer which is crosslinked with from 4 to 14% by weight, based on the copolymer, of divinylbenzene and has a particle size of from 10 to 200 micrometers, a specific surface area of from 2 to 40 square meters/gram and a pore with of from 0,5 to 40 nanometers.

Process for the preparation of 3- (hydroxyphenyl) propionaldehydes and optionally the production of 3- (hydroxyphenyl) propanols

CATALYTICALLY EFFECTIVE SALT MIXTURES

Process for the regulation of the intermediate molecular weight distribution of polyoxyalkyleneglycols and derivatives of polyoxyalkylenes during the ringopening polymerisation of cyclic ethers and/or acetals catalysed by heteropolyacids

Catalytically active salt mixtures containing a quaternary alkyl ammonium alkyl carbonate.

Process for the preparation of methylisobutylketone and isoprene

Process for the preparation of 2,2-bis-hydroxymethyl-butanediol- (1,4).

1,1'-BIS- (3-AMINOPROPIL) -2,2'-DIIMIDAZOLE.

DIIMIDAZOL 1,1''-BIS(3-AMINOPROPILO)-2,2'' DE LA FORMULA I ASI COMO UN NUEVO PROCESO PARA LA FABRICACION DE DIIMIDAZOL 1,1''-BIS(3-AMINOPROPILO)-2,2''DE LA FORMULA I, PARA LO CUAL EL DIIMIDAZOL 2,2'' DE LA FORMULA II, SE CONVIERTE CON ACRILONITRILO DE LA FORMULA III EN PRESENCIA DE CATALIZADORES BASICOS A TEMPERATURAS DESDE 80 HASTA 150 (GRADOS) C Y SE HIDRATA CON HIDROGENO EN EXCESO EN PRESENCIA DE AMONIACO CON CATALIZADORES QUE CONTIENEN COBALTO, NIQUEL, RUTENIO Y/O METALES NOBLES A TEMPERATURAS DESDE 40 HASTA 200 (GRADOS) C Y PRESIONES DESDE 10 HASTA 200 BAR. DIIMIDAZOLE 1,1 '' - BIS (3-AMINOPROPYL) -2,2 '' OF FORMULA I AS WELL AS A NEW PROCESS FOR THE MANUFACTURE OF DIIMIDAZOLE 1,1 '' - BIS (3-AMINOPROPYL) -2,2 ' 'OF FORMULA I, FOR WHICH DIIMIDAZOLE 2.2' 'OF FORMULA II, BECOMES WITH FORMULA III ACRYLONITRILE IN THE PRESENCE OF BASIC CATALYSTS AT TEMPERATURES FROM 80 TO 150 (DEGREES) C AND HYDRATES WITH EXCESS HYDROGEN IN THE PRESENCE OF AMMONIA WITH CATALYSTS CONTAINING COBALT, NICKEL, RUTHENIUM AND / OR NOBLE METALS AT TEMPERATURES FROM 40 TO 200 (DEGREES) AND PRESSURES FROM 10 TO 200 BAR.

Process for the preparation of carbonates

Herstellung von Carbonaten durch Umsetzung von Carbamidsäureestern mit Alkoholen bei einer Temperatur oberhalb 140°C wobei man während der Umsetzung den gebildeten Ammoniak abtrennt. Die nach dem Verfahren der Erfindung herstellbaren Carbonate sind wertvolle Ausgangsstoffe für die Herstellung von Farbstoffen, Pflanzenschutzmitteln und Kunststoffen. Production of carbonates by reaction of carbamic acid esters with alcohols at a temperature above 140 ° C., the ammonia formed being separated off during the reaction. The carbonates which can be prepared by the process of the invention are valuable starting materials for the production of dyes, crop protection agents and plastics.

Process for obtaining trialkylamines and methyle formiate in the preparation of trimethylolalkanes

Trialkylamines and methyl formate are recovered from reaction mixtures obtained in the preparation of trimethylolalkanes by reaction of n-alkanals with from 2.2 to 4.5 moles of formaldehyde in aqueous solution in the presence of from 0.6 to 3 mole of trialkylamine, each quantity based on 1 mole of alkanal, and subsequent hydrogenation in a process wherein the crude reaction mixture a) is heated to from 100 DEG to 200 DEG C., the water present in the reaction mixture is substantially separated off by distillation, together with any excess free trialkylamine, the trialkylamine present in the form of a trialkylammonium formate is freed to form a trimethylolalkane formate, the trialkylamine is distilled off and the trimethylolalkane formate is transesterified with methanol to trimethylolalkane and methyl formate in the presence or absence of a catalytic amount of an alkali metal alkoxide or alkaline earth metal alkoxide, or b) is substantially dewatered, any excess free trialkylamine being removed at the same time, the trialkylamine present in the form of a trialkylammonium formate is separated off by admixing the remaining mixture with methanol and heating the admixture to from 100 DEG to 200 DEG C. to form methyl formate and trialkylamine.

Process and catalyst for the preparation of methacrylic acid

Process for the preparation of 4-acetals of 1,4-butene dial, and acetals of 1,4-butene dial

Process for the production of esters of 6-aminocaproic acid

Verfahren zur Herstellung von 6-Aminocapronsäureestern durch Umsetzen von 5-Formylvaleriansäureestern mit Ammoniak und Wasserstoff unter Mitverwendung von Alkanolen als Lösungsmittel in Gegenwart von Hydrierkatalysatoren bei erhöhter Temperatur und unter erhöhtem Druck, dadurch gekennzeichnet, daß man die Umsetzung bei einer Temperatur von 40 bis 95°C durchführt. Process for the preparation of 6-aminocaproic acid esters by reacting 5-formylvaleric acid esters with ammonia and hydrogen with the use of alkanols as solvents in the presence of hydrogenation catalysts at elevated temperature and under elevated pressure, characterized in that the reaction is carried out at a temperature of 40 to 95 ° C performs.

Process for the recovery of isobutene from mixtures of C4-hydrocarbons containing isobutene

Process for isolating isobutene from isobutene-containing C4-hydrocarbon mixtures by reacting the mixture with a primary alcohol in the presence of an acidic condensing agent and separating the tertiary ether formed in the presence of an acid catalyst at elevated temperatures, wherein the primary alcohol used is a primary C3- or C4-alcohol and the acidic condensing agent used for ether formation is an ion exchanger in the hydrogen form, the primary C3- or C4-alcohol and the C4-hydrocarbon mixture, with or without prior mixing, first being introduced into the reaction zone (4) for the etherification, where the ion exchanger is located, then subjecting the reaction mixture obtained from the etherification zone (4) to a distillation in a first distillation zone (6), withdrawing as head product, without inclusion of a scrub with water, a C4-hydrocarbon mixture which contains the unconverted hydrocarbons and which has a primary C3- or C4-alcohol content of not more than 1000 ppm by weight and as bottom product the C3- or C4-alkyl tert-butyl ether formed which may still contain the primary C3- or C4-alcohol added in excess, then passing the bottom product into a second reaction zone (11) which contains an acid catalyst and in which the C3- or C4-alkyl tert-butyl ether is separated at elevated temperature into isobutene and primary C3- or C4-alcohol, passing the mixture of isobutene and primary C3- or C4-alcohol into a second distillation zone (13) in which is withdrawn as head product, without inclusion of a scrub with water, isobutene containing not more than 500 ppm by weight of primary C3- or C4-alcohol and as bottom product the primary C3- or C4-alcohol, and recycling the primary C3- or C4-alcohol into the etherification zone (4). <IMAGE>

Process for preparing 2-(3-aminopropyl)-cycloalkylamines

Method for the preparation of isocyanates by thermal decomposition of urethanes

A process for the pyrolysis of mono-, di-, and polyurethanes to the corresponding mono-, di-, and polyisocyanates wherein the urethane to be cleaved is heated under pressure and sprayed through a nozzle into a pyrolysis chamber maintained at reduced pressure. The isocyanate and alcohol cleavage products are separated by fractional condensation.

2,2-Dialkylpentane-1,5-diisocyanates, -diurethanes, and -dicarbamic acid chlorides, process for their preparation and their use

The invention relates to novel 2,2-dialkylpentane 1,5-diisocyanates, 2,2-dialkylpentane-1,5-diurethanes and 2,2-dialkylpentane-1,5-dicarbamoyl chlorides of the formula <IMAGE> in which R<1>, R<2> denote identical or different linear C1- to C12-alkyl radicals, branched C3- to C12-alkyl radicals, branched C2- to C12-alkenyl radicals, branched C4- to C12-alkenyl radicals or the radicals R<1> and R<2> together denote an alkylene group having 4 to 7 C atoms which is unsubstituted or substituted by one to 5 C1- to C4-alkyl groups and X denotes an NCO-, NH-CO2R<3>-, NHCO2R<4>- or NHCOCl- group, in which R<3> and R<4> are identical or different and denote a linear C1- to C20-alkyl radical, a branched C3- to C20-alkyl radical or a C5- to C12-cycloalkyl radical. The 2,2-dialkylpentane-1,5-diurethanes are, for example, pest control agents and are suitable, as are the 2,2-dialkylpentane-1,5-dicarbamoyl chlorides, for example, for the preparation of 2,2-dialkylpentane 1,5-diisocyanates, which in turn are used for the preparation of compact or cellular plastics by the polyisocyanate polyaddition process.

Use of hydrogenation catalysts for the production of propanediols and process for the production of propanediols with such catalysts

METHOD FOR SEPARATING METHANOL FROM WATER-CONTAINING MIXTURES OF METHYL METHACRYLATE AND METHANOL

Patent DE2802199C3

PROCESS FOR THE PRODUCTION OF ISOCYANATES BY THERMAL CLEAVAGE OF URETHANES.

Organic isocyanates, preferably alkyl, mono-, di- and/or polyisocyanates or aryl-mono-, di- and/or polyisocyanates, are prepared by thermally cleaving the corresponding urethanes at temperatures of 175 DEG C. to 600 DEG C. in the presence of carbon, preferably in an agitated carbon bed or in a fluidized bed containing carbon.

New 2,2-dialkylpentane-1,5-diisocyanates, diurethanes and dicarbamic acid chlorides, processes for their preparation and their use

Process for the preparation of n-omega-hydroxyalkyl, n-omega-hydroxy-oxa-alkyl and n-omega-hydroxy-polyoxa-alkyl carbamates

Herstellung von N-ω-Hydroxialkyl-, N-ω-Hydroxi-oxa-alkyl- und N-ω-Hydroxi-­ polyoxa-alkyl-carbaminsäureestern durch Umsetzen von ω-Aminoalkanolen, ω-Amino-oxa-alkanolen oder ω-Amino-polyoxa-alkanolen mit Harnstoff und einem Alkohol. Preparation of N-ω-Hydroxykyl-, N-ω-Hydroxy-oxa-alkyl- and N-ω-Hydroxy polyoxa-alkyl-carbamic acid esters by reacting ω-aminoalkanols, ω-amino-oxa-alkanols or ω-amino-polyoxa-alkanols with urea and an alcohol.

Conversion of 1,3-dioxanes into 4-oxa-aldehydes

Alkoxyalkyl-aminotriazine-transetherifying products and their use

Alkoxyalkylaminotriazine trans-etherification products are obtained by reacting an alkoxyalkylaminotriazine of the general formula <IMAGE> (I) where X is hydrogen, alkyl, phenyl, alkylphenyl or <IMAGE> A and B are hydrogen, alkyl, alkenyl or <IMAGE> and R and R' are hydrogen or alkyl, with from 0.1 to 6 moles, per mole of alkoxyalkylaminotriazine, of a beta -hydroxyaldehyde of the general formula <IMAGE> where R'', R''' and R'''' are identical or different and each is hydrogen or alkyl or R''' and R'''' together with the alpha -carbon atom form a cyclopentane or cyclohexane ring, and R''' and/or R'''' can also be hydroxyalkyl and R'''' can also be phenyl, in the presence of an acidic catalyst, and removing the alcohol resulting from the trans-etherification. The alkoxyalkylaminotriazine trans-etherification products may be used in baking finishes and acid-hardening surface coatings.

Process for the preparation of n-aryl-oxazolidine-2,4-diones

Process for the production of 6-aminocaproic acid

Verfahren zur Herstellung von 6-Aminocapronsäure, dadurch gekennzeichnet , daß man a) 5-Formylvaleriansäureester mit Wasser in Gegenwart von sauren Mitteln bei einer Temperatur von 30 bis 200°C umsetzt und b) die so erhaltene 5-Formylvaleriansäure mit überschüssigem Ammoniak und Wasserstoff in Gegenwart von Hydrierkatalysatoren und unter Re­aktionsbedingungen inerten Lösungsmitteln bei einer Temperatur von 50 bis 150°C unter erhöhtem Druck umsetzt. Process for the preparation of 6-aminocaproic acid, characterized in that a) 5-formylvalerate with water in the presence of acidic agents at a temperature of 30 to 200 ° C and b) the 5-formylvaleric acid thus obtained is reacted with excess ammonia and hydrogen in the presence of hydrogenation catalysts and solvents which are inert under the reaction conditions at a temperature of 50 to 150 ° C. under elevated pressure.

Process for the purification of 2,2-dimethyl-1,3-propanediol-monohydroxypivalic acid ester

Process for the simultaneous preparation of ethylene cyanohydrine and its ethers

Process for the preparation of 6-aminocaproic acid esters

Process for the preparation of 6-aminocaproic acid esters by reacting 5-formylvaleric acid alkyl esters with ammonia in excess and with hydrogen in the presence of hydrogenation catalysts at elevated temperature and at elevated pressure, characterised in that the reaction is carried out in the presence of ruthenium catalysts in liquid ammonia as the reaction medium.

Process for the preparation of aryl-mono-,-di-and/or polyurethanes-

Propylene oxide prodn. from propylene glycol mono-acetates - produced from allyl acetate and acetic acid on sulphonated cation exchanger

In the prodn. of propylene oxide (1) from propylene glycol 1,2-monoacetates (II) in the gas phase in the presence of basic materials (III), allyl acetate (IV) is reacted with excess acetic acid (V) in the presence of an organic sulphonated cation exchanger (VI) with a particle size of 10-200 mu m., which is suspended in the liquid reaction mixt. After removing the excess (V) from the mixt. of propylene glycol 1,2-diacetate (VII) and (V) formed, (VII) is hydrolysed to a mixt. of (VII) and (II) in 2:1 to 1:3 molar ratio with 50-200 mole % water in the presence of (VI). The unreacted water and (V) formed are removed, and the mixt. of (VII) and (II) is converted to (I) in the gas phase at 350-425 degrees C, in the presence of (III) and the (V) formed is recycled, whilst the unchanged (VII) and (II) are also recycled. The process avoids the use of dissolved noble metal catalysts and associated catalyst losses or very corrosive catalysts requiring cost appts. for corrosion prevention and recovery. (IV) is prepd. by reacting propylene with (V) and O2 in the gas phase on catalysts contg. Pd, giving a crude mixt. of (IV), (V) and water, which is dehydrated by azeotropic distn. with (IV) as reflux.

Process for the preparation of aminopropionitriles

Dialkoxy-1,1-dialkyl-3-phosphono propanes prodn - by reacting trialkyl phosphites, with acrolein in the presence of an alkanol

Dialkoxy-1, 1-dialkyl-3-phosphonopropanes (R1O)2POCH2CH2CH(OR2)2 (I) (where R1 and R2 are aliphatic gps) are made by reacting a phosphite ester (R1O)3P (II) with acrolein in the presence of an alkanol R2OH (III), using >1.5 mols (II) per mol (III). Pref. (I) is hydrolysed without intermediate isolation using an acid and water to give a dialkyl-3-phosphono-propanol of formula (R1O)2POCH2CH2CHO (IV). The cpds. (IV) are solvents and useful inters. for the prepn. of plastics, fire retardant agents and dyes. Process is simpler and more efficient than prior art and gives higher yields of (I) without the formation of tarry deposits.

PROCEDURE FOR THE MANUFACTURE OF 3-AMINOMETIL-3,5,5-TRIMETIL-CICLOHEXILAMINA.

LA INVENCION TRATA DE UN PROCEDIMIENTO: QUE SE UTILIZA PARA OBTENER A (A) Y CONSISTE EN; TRATAR AL 3-CIANO-3,5,5-TRIMETILCICLOHEXANONA CON AMONIACO EN EXCESO, EN PRESENCIA DE CATALIZADORES DE OXIDOS METALICOS ACIDOS, ENTRE 20 Y 150 C Y A UNA PRESION ENTRE 15 Y 500 BAR E HIDROGENAR AL PRODUCTO RESULTANTE CON HIDROGENO, EN PRESENCIA DE AMONIACO EN EXCESO Y DE CATALIZADORES METALICOS CONTENIENDO METALES NOBLES Y OTROS METALES COMO COBALTO, NIQUEL Y RUTENIO Y OTROS PORTADORES BASICOS Y NEUTROS, ENTRE 60 Y 150 C Y A UNA PRESENTE 50 Y 300 BAR. SIENDO A EL 3-AMINOMETILO-3,5,5 -TRIMETILO-CICLOHEXILAMINO. THE INVENTION IS ABOUT A PROCEDURE: WHICH IS USED TO OBTAIN A (A) AND CONSISTS OF; TREAT 3-CIANO-3,5,5-TRIMETILCICLOHEXANONA WITH EXCESS AMMONIA, IN THE PRESENCE OF ACID METAL OXIDE CATALYSTS, BETWEEN 20 AND 150 C AND A PRESSURE BETWEEN 15 AND 500 BAR AND HYDROGEN THE RESULTING PRODUCT WITH HYDROGEN, AMMONIA IN EXCESS AND METALLIC CATALYSTS CONTAINING NOBLE METALS AND OTHER METALS SUCH AS COBALT, NICKEL AND RUTHENIUM AND OTHER BASIC AND NEUTRAL CARRIERS, BETWEEN 60 AND 150 C AND A PRESENT 50 AND 300 BAR. BEING 3-AMINOMETHYL-3,5,5-TRIMETHYL-CYCLOHEXYLAMINE.

Process for the preparation of methacrylic acid

1. A process for the preparation of methacrylic acid by oxidizing methacrolein by means of a gas mixture containing oxygen and steam, at from 200 to 340 degrees C over a catalyst which contains molybdenum, tungsten, antimony and phosphorus, and isolating the methacrylic acid from the reaction gases in a conventional manner, wherein the oxidation is carried out over a catalyst of the general formula Mo12 Pa Wb Sbc Asd Cue Xf Yg Ox where X is Nb, Fe, Mn, Sn and/or Cr, Y is an alkali metal, a is 0.1-3, b is 0.1-4, c is > 0-2, d is 0-1, e is 0-1, d + e is > 0-2, f is 0-1.5, e + f is 0-2, g is 0 to < 0.1, and x is the number of oxygen atoms formally required to saturate the valencies of the catalyst components.

Process for preparing nitriles of aminopropionic acid

Process for the preparation of aminopropionitriles of the general formula I <IMAGE> in which R denotes hydrogen or methyl, by reacting ammonia with acrylonitriles of the general formula II <IMAGE> in which the substituents have the abovementioned meanings, in a molar ratio of 1:1 to 500:1 on heterogeneous catalysts at temperatures from 40 to 180 DEG C and pressures from 10 to 350 bar.

Patent DE1568090C3

PROCESS FOR THE PREPARATION OF METHYLENE BIS-(4-PHENYL CARBAMINATE).

A process for the preparation of methylene-bis-(4-phenylcarbamic acid esters), wherein an N-phenylcarbamic acid ester is reacted with a formaldehyde-acetal in the presence of an acid at up to 200 DEG C.

1,1'-bis-(3-aminopropyl)-2,2'-diimidazole

1,1'-Bis-(3-aminopropyl)-2,2'-diimidazole of the formula I, <IMAGE> and a novel process for the preparation of 1,1'-bis-(3-aminopropyl)-2,2'-diimidazole of the formula I, in which 2,2'-diimidazole of the formula II, <IMAGE> is reacted with acrylonitrile of the formula III, <IMAGE> in the presence of basic catalysts at temperatures from 80 to 150 DEG C, and the product is hydrogenated with an excess of hydrogen on cobalt-, nickel-, ruthenium- and/or noble-metal-containing catalysts in the presence of ammonia, at temperatures from 40 to 200 DEG C and under pressures from 10 to 200 bar.

Patent DE1568090B2

Process for obtaining isobutene from mixtures of c4-hydrocarbons containing isobutene

CONVERSION OF 1,3-DIOXANES TO 4-OXA ALDEHYDES

Process for the preparation of hexamethylene diisocyanate-1,6 and/or of the isomeric diisocyanates with 6 carbon atoms in the alkyl group

Die Erfindung betrifft ein Verfahren zur Herstellung von Hexamethylen-diisocyanat-1,6 und/oder isomeren aliphatischen Diisocyanaten mit 6 Kohlenstoffatomen im Alkylenrest, vorzugsweise 2-Methyl-pentamethylen-diisocyanat-1,5 und/oder 2-Ethyl-tetramethylen-diisocyanat-1,4, durch unzersetztes Verdampfen, zweckmäßigerweise unter vermindertem Druck, der entsprechenden Dialkylurethane bei Temperaturen von 220 bis 300°C, thermisches Spalten der Dialkylurethan-Dämpfe in der Gasphase unter vermindertem Druck, vorzugsweise 0,1 bis 200 mbar, bei Temperaturen über 300°C, vorzugsweise 310 bis 480°C, insbesondere in Gegenwart von Halogenwasserstoffen und/oder Halogenwasserstoff-Donatoren, die unter den Reaktionsbedingungen Halogenwasserstoff bilden, so daß die Halogenwasserstoff-Konzentration bei der Spaltung von 0,001 bis 1,0 Mol-%, bezogen auf Dialkylurethane, beträgt und fraktioniertes Kondensieren der Spaltprodukte, wobei in der 1. Kondensationsstufe überwiegend die Diisocyanate und in der 2. Kondensationsstufe der Alkohol erhalten wird. The invention relates to a process for the preparation of 1,6-hexamethylene diisocyanate and / or isomeric aliphatic diisocyanates having 6 carbon atoms in the alkylene radical, preferably 2-methyl-pentamethylene-1,5-diisocyanate and / or 2-ethyl-tetramethylene-diisocyanate. 1.4, by undecomposed evaporation, expediently under reduced pressure, of the corresponding dialkyl urethanes at temperatures from 220 to 300 ° C., thermal splitting of the dialkyl urethane vapors in the gas phase under reduced pressure, preferably 0.1 to 200 mbar, at temperatures above 300 ° C, preferably 310 to 480 ° C, especially in the presence of hydrogen halide and / or hydrogen halide donors, which form hydrogen halide under the reaction conditions, so that the hydrogen halide concentration during the cleavage of 0.001 to 1.0 mol%, based on Dialkylurethane, and fractional condensation of the cleavage products, the diisocyanates predominantly in the first ...

Patent DE2233357B2

DIAMINO ALKYLPHOSPHONIC ACID DIAL KYLESTERS AND THE PROCESS FOR THEIR PRODUCTION

METHOD FOR PRODUCING ISOCYANATES BY THERMAL CLEAVING OF URETHANES

A process for the pyrolysis of mono-, di-, and polyurethanes to the corresponding mono-, di-, and polyisocyanates wherein the urethane to be cleaved is heated under pressure and sprayed through a nozzle into a pyrolysis chamber maintained at reduced pressure. The isocyanate and alcohol cleavage products are separated by fractional condensation.

Process for the production of 1-carbamoyl-pyrazoles

Process for the production of 1-carbamoylpyrazole and its derivatives by reacting pyrazole or its derivatives, characterised in that pyrazole or its derivatives are reacted with urea at temperatures above 30 DEG C.

METHOD FOR PRODUCING AROMATIC DI- AND / OR POLYISOCYANATES

Mehrstufiges verfahren zur kontinuierlichen herstellung von organischen polyisocyanaten

Verfahren zur thermischen spaltung von carbamidsäureestern