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Patent Searching and Data


Matches 51 - 100 out of 865

Document Document Title
WO/2012/020028
The invention relates to a method for producing urethanes or ureas or mixtures of urethanes and ureas by oxidative carbonylation of organic amines in the presence of carbon monoxide, oxygen and a catalyst, where the catalyst used is a tr...  
WO/2012/005059
A method of producing toluene dicarbamate is provided with: a carbamate production step in which toluenediamine, urea and/or an N-unsubstituted carbamic acid ester, and an alcohol are reacted to produce toluene dicarbamate; and a benzoyl...  
WO/2011/161029
Proposed is a process for preparing isocyanates by dissociating the corresponding carbamates, which is characterized in that the carbamates are dissociated in the presence of a heterogeneous Lewis-acidic catalyst.  
WO/2011/158598
The disclosed carbamate production method is provided with a urea-producing process, a carbamation process, an ammonia-separating process wherein gas is absorbed in water in the presence of carbonate salt to form water with absorbed gas ...  
WO/2011/138245
The invention relates to a method for producing isocyanates by reacting the corresponding amine with phosgene in the gas phase, wherein a thinning agent comprising between 90.0000% by mass and 99.9999% by mass of materials that are inert...  
WO/2011/130901
A jet reactor with dynamic spray nozzle comprises an inner feed pipe (2), an outer feed pipe (3), a gear box (6), a transmission shaft (1) and a transmission linking gear (4). The transmission shaft (1), the inner feed pipe (2) and the o...  
WO/2011/130907
A preparation method of isocyanate by interfacial phosgenation reaction is provided, which comprises the following steps: (a) allowing a solution stream of polyamine having the general formula (II) and a liquid stream of phosgene to flow...  
WO/2011/130032
The invention relates a process for producing isocyanates comprising the steps of a) providing an azolide and optionally a solvent, and b) adding an acid at a temperature below about 40C. The invention also relates to the isocyanate obta...  
WO/2011/125429
Disclosed is a method for producing a carbamate compound represented by formula (3), wherein a fluorine-containing carbonate diester compound represented by formula (1) and a non-aromatic diamine compound represented by formula (2) are c...  
WO/2011/115849
Excessive residence time in the conduits located between the outlet of a static mixer and a reactor/separator reservoir can lead to undesired by-products, formation of solids, and conduit fouling. This disclosure relates to an improved c...  
WO/2011/115848
This disclosure relates to a static phosgene mixer, and more generally, to an apparatus for mixing of fluid components such as phosgene and amine during an highly reactive, chemical reaction that is vulnerable to the creation of undesire...  
WO/2011/113737
The invention relates to a method for producing isocyanates, comprising (a) reacting at least one amine with phosgene in the gas phase in a reaction zone and (b) subsequently cooling the reaction gases in a cooling zone by means of indir...  
WO/2011/108473
Disclosed is a method for producing 1,5-pentamethylene diamine, wherein a processed lysine decarboxylase expressing microorganism is used.  
WO/2011/104264
The invention relates to a method for producing isocyanates by reacting the corresponding amines with phosgene in the gas phase, optionally in the presence of an inert medium, comprising the following steps: (a) evaporating the amine in ...  
WO/2011/089098
The invention relates to a method for producing isocyanates by thermally splitting carbamates, also known as carbamide acid ester or urethane. The carbamate splitting increases in significance as a phosgene-free method for producing isoc...  
WO/2011/078000
A method for treating an isocyanate residue, which comprises carrying out a thermal decomposition reaction of a carbamate that is produced by the reaction among an amine, urea and/or an N-unsubstituted carbamic acid ester and an alcohol ...  
WO/2011/072903
The invention relates to compounds made of (cyclo)aliphatic diisocyanates, produced according to a multi-stage method (phosgene-free production), which comprises the conversion of (cyclo)aliphatic diamines into the corresponding (cyclo)a...  
WO/2011/067369
The invention relates to a method for producing aromatic isocyanates by reacting the corresponding formamides with an oxygen-containing gas on noble metal catalysts at temperatures of 300 to 600ºC and a contact time of 1 to 1000 ms, cha...  
WO/2011/067242
The invention relates to a method for producing isocyanates by thermally splitting carbamates, a carbamate splitting gas comprising the corresponding isocyanate and the corresponding alcohol being obtained, the invention being characteri...  
WO/2011/051314
The invention relates to a method for the combined production of diisocyanates and/or polyisocyanates and glycols, comprising the process stages A, B, C, and E for producing glycols and the process stages A, C, D, E, F and G for producin...  
WO/2011/048124
The invention relates to a method for producing urethanes by reacting aromatic amines by with a dialkyl carbonate, characterized in that the alkyl radical of the organic dialkyl carbonate comprises 4-18 carbon atoms and is branched in th...  
WO/2011/049023
A process for producing an isocyanate compound, comprising a step of producing a compound represented by formula (2) from a compound represented by formula (1) by carrying out a trihalomethane removal reaction in the presence of at least...  
WO/2011/036062
The invention relates to a multi-stage method for the continuous production of organic, distillable polyisocyanates, preferably diisocyanates, especially preferably aliphatic or cycloaliphatic diisocyanates, by reacting the corresponding...  
WO/2011/037310
The present invention relates to a production method for a group 3 alkyl isocyanate, wherein the group 3 alkyl isocyanate is used as a solvent or dispersant in the presence of a Lewis acid catalyst when reacting a group 3 alkyl halide an...  
WO/2011/036062
The invention relates to a multi-stage method for the continuous production of organic, distillable polyisocyanates, preferably diisocyanates, especially preferably aliphatic or cycloaliphatic diisocyanates, by reacting the corresponding...  
WO/2011/021258
Provided is a process for the preparation of an N-substituted carbamic acid O-aryl ester derived from a ureido-containing compound. The process comprises a step of preparing an N-substituted carbamic acid O-aryl ester from both a ureido ...  
WO/2011/021257
Provided is a method for producing an N-substituted carbamic acid ester derived from an organic amine from an organic amine, a carbonic acid derivative, and a hydroxy compound containing one or more hydroxy compounds. The method comprise...  
WO/2011/018443
The invention relates to a method for producing diisocyanates by gas-phase phosgenation, starting from an educt flow comprising the corresponding diamines and a phosgene, the educt flows each being separately converted to the gas phase a...  
WO/2011/018443
The invention relates to a method for producing diisocyanates by gas-phase phosgenation, starting from an educt flow comprising the corresponding diamines and a phosgene, the educt flows each being separately converted to the gas phase a...  
WO/2011/015541
The invention relates to an improved multi-step method for the continuous production of diisocyanates by the reaction of the corresponding diamines with carbonic acid derivatives and alcohols in low-molecular monomer urethanes and the th...  
WO/2011/006609
The invention relates to a method for producing isocyanates by reacting primary amines with carbonyl dichloride in the gaseous phase. According to said method, the amine is evaporated, superheated and transported to the reactor with a re...  
WO/2011/006970
The present invention accordingly provides a process for preparing light-coloured polyphenylene-polymethylene polyisocyanates comprising the steps (a) providing an amount of chlorine, (b) separating the chlorine provided in the step (a) ...  
WO/2011/006807
The present invention relates to a process for preparing light-coloured polyphenylene-polymethylene-polyisocyanate (PMDI), comprising the steps (a) providing carbon monoxide and chlorine, (b) reacting carbon monoxide with chlorine to for...  
WO/2011/003531
The invention relates to a method for the continuous production of isocyanates by reacting the corresponding amines with phosgene in a reactor in the gas phase in the presence of at least one inert material, wherein a stream containing p...  
WO/2011/003532
The invention relates to a method for producing isocyanates by reacting primary amines with phosgene in a stoichiometric excess in the gas phase, wherein the excess phosgene is subsequently recovered and recirculated back into the reaction.  
WO/2010/149544
The present invention relates to a process for the production of isocyanates, preferably diisocyanates and polyisocyanates of the diphenylmethane series (MDI), by reacting an amine with phosgene in the liquid phase or in the gas phase to...  
WO/2010/149544
The present invention relates to a process for the production of isocyanates, preferably diisocyanates and polyisocyanates of the diphenylmethane series (MDI), by reacting an amine with phosgene in the liquid phase or in the gas phase to...  
WO/2010/149701
The invention relates to a method for sensing water ingress and the resulting corrosion in systems for producing isocyanates by reacting phosgene with one or more primary amines in a solvent. The invention further relates to an apparatus...  
WO/2010/121997
The invention relates to a method for producing methylene diphenyl diamine (MDA) by reacting formaldehyde and aniline in the presence of an acidic catalyst, characterized in that in the production of MDA, the oxygen content in the proces...  
WO/2010/115908
The invention relates to a method for producing isocyanates by reacting the corresponding amines with phosgene, optionally in the presence of an inert medium, wherein phosgene and amine are first mixed and are converted in a reactor to f...  
WO/2010/116871
Disclosed is a process for producing an urethane compound, which comprises reacting a primary amine, urea and/or an N-unsubstituted carbamic acid ester and an alcohol with one another in the presence of a catalyst comprising a first meta...  
WO/2010/106131
The invention relates to a method for producing isocyanates by converting the corresponding amine with phosgene in the gas phase, in the presence of an inert medium as applicable, wherein phosgene and amine are first vaporized and then o...  
WO/2010/106131
The invention relates to a method for producing isocyanates by converting the corresponding amine with phosgene in the gas phase, in the presence of an inert medium as applicable, wherein phosgene and amine are first vaporized and then o...  
WO/2010/105768
The invention is directed to a process for preparing aromatic carbamates which comprises the reaction of an aromatic amine with an organic carbonate in the presence of a catalyst characterized in that Zn4O(OAc)6 is used as catalyst.  
WO/2010/105768
The invention is directed to a process for preparing aromatic carbamates which comprises the reaction of an aromatic amine with an organic carbonate in the presence of a catalyst characterized in that Zn4O(OAc)6 is used as catalyst.  
WO/2010/103155
The invention relates to the production of carbamates in a single reactor (one-pot) using solid catalysts, involving the reaction between at least one nitro compound, an organic carbonate of formula (OR)(OR’)C=O, a gas selected from hyd...  
WO/2010/100221
The invention relates to a method for producing isocyanates by reacting the corresponding amines with phosgene in the gas phase, optionally in the presence of an inert medium, wherein the amine is evaporated in an evaporator to form a ga...  
WO/2010/095927
The invention relates to a method for separating an isocyanate mixture which contains at least two isomers of the respective isocyanate and various additional impurities simultaneously into two product streams which are characterized by ...  
WO/2010/076515
The invention relates to a method for the continuous preparation of a (poly)isocyanate, including a step of the phosgenation reaction of an amine in a piston reactor with internal recycling.  
WO/2010/063665
The invention relates to a method for producing isocyanates by reacting the corresponding amines with phosgene in the gaseous phase, optionally in the presence of an inert medium. According to said method, the amine and the phosgene are ...  

Matches 51 - 100 out of 865