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JP5525500B2 |
The present invention relates to 1H-Quinazoline-2,4-diones of formula (I) wherein R 1 and R 2 are as defined in the specification, their preparation, their use as pharmaceuticals, and pharmaceutical compositions containing them. Further,...
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JP5518726B2 |
This invention relates to novel compounds with ester linkage(s) capped with either electron deficient olefinic linkage(s) or group(s) or reactive functional groups (termed herein as "active methylene reagents"), and curable compositions ...
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JP5518056B2 |
Procedure for preparing carbamates comprising reaction between at least: an amine or polyamines, an organic carbonate of formula (OR)(OR')C=O, a catalyst formed at least by a support selected from among at least a metal oxide, a micropor...
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JP5518605B2 |
A method for producing toluenedicarbamate includes a carbamate production process of producing toluenedicarbamate by reaction between toluenediamine, urea, and/or N-unsubstituted carbamic acid ester, and alcohol; and a benzoyleneurea red...
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JP5519942B2 |
Producing methylene diphenyl diisocyanates, comprises: (a) reacting aniline with formaldehyde in the presence of hydrochloric acid as catalyst to a mixture of di- and polyamines of diphenylmethane and subsequently at least partially neut...
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JP5502286B2 |
Preparing chlorine comprises subjecting a hydrogen chloride stream having a sulfur content of less than 100 ppm, based on weight of the hydrogen chloride stream, to catalytic oxidation. An independent claim is included for preparing an i...
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JP5499023B2 |
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JP5499022B2 |
A method for producing urethane compounds includes allowing a primary amine, a urea and/or an N-unsubstituted carbamate, and an alcohol to react in the presence of a compound containing a noncoordinating anion and a metal atom as a catal...
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JP5487303B2 |
A method for producing carbamate including a urea production step; a carbamate-forming step; an ammonia separation step of absorbing the gas with water in the presence of carbonate to produce a gas absorption water, and separating ammoni...
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JP5479675B2 |
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JP5466658B2 |
Compounds having isocyanate groups with or without blocking, allophanate groups and free-radically polymerizable C-C double bonds, the C-C double bonds being in activated form by virtue of a carbonyl group attached directly to them or by...
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JP5460321B2 |
The invention relates to a multistage process for the continuous preparation of organic, distillable isocyanates, preferably diisocyanates, particularly preferably aliphatic or cycloaliphatic diisocyanates, by reaction of the correspondi...
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JP5460327B2 |
The present invention relates to a process for preparing isocyanates.
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JP5449082B2 |
The production of methylene-di-phenylamine from aniline (A) and formaldehyde (F) with an acid catalyst (C) comprises placing (A) and possibly (C) in a reactor, feeding (F) and possibly (C) through a mixer into a circulation loop containi...
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JP5443487B2 |
The invention relates to a process for preparing isocyanates by reacting the corresponding amines with phosgene in the liquid phase, if appropriate in the presence of at least one inert medium, in which the amine and the phosgene are fir...
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JP5441460B2 |
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JP5433213B2 |
Preparation of primary aromatic diisocyanate comprises reacting the corresponding primary aromatic diamine with phosgene in gas phase within an average time period of 0.05-15 seconds, where the used primary aromatic diamine contains less...
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JP5424895B2 |
Producing diisocyanate comprises reacting corresponding diamines with stoichiometric excess of phosgene in at least a reaction zone, where: the reaction condition is selected in such a way that at least the reaction components diamine, d...
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JP5419327B2 |
Crude aniline is produced by hydrogenating nitrobenzene in the presence of a catalyst to produce crude aniline, and purifying the crude aniline by single- or multi-stage distillation. An aqueous alkali metal hydroxide solution is added t...
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JP5416830B2 |
The invention relates to a process for preparing methylenediphenyldiamine (MDA) by reacting formaldehyde and aniline in the presence of an acidic catalyst, wherein the oxygen content in the process for preparing MDA is <10 000 ppm, based...
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JP5416387B2 |
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JP5414522B2 |
The invention provides a process for preparing isocyanates by reacting amines with phosgene, wherein the amine or a mixture of amine and a solvent is mixed in the form of an aerosol with gaseous phosgene and the amine is subsequently rea...
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JP5404598B2 |
The present invention describes a process for preparing water-emusifiable polyisocyanate.
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JP5404627B2 |
The present invention relates to a process for preparing diisocyanates from diamines and phosgene in the gas phase.
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JP5398714B2 |
The invention provides a process for preparing polyisocyanates, comprising the steps of a) reacting amines with phosgene, b) removing hydrogen chloride, excess phosgene and, if appropriate, the solvent from the reaction mixture, c) separ...
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JP2014500878A |
The invention relates to a process for purifying mixtures comprising 4,4'-methylene diphenyl diisocyanate, comprising the distillative purification of a mixture I comprising 4,4'-methylene diphenyl diisocyanate by means of a column K1, w...
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JP5388427B2 |
Isocyanates are produced by reacting an organic amine with phosgene in process which includes at least three stages. The first stage is carried out in a dynamic mixer. The second stage is carried out in at least one reactor. The third st...
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JP5386038B2 |
The invention relates to a method of measuring entry of water and resulting corrosion in plants for producing isocyanates by reacting phosgene with one or more primary amines in a solvent. The invention further relates to an apparatus fo...
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JP5380931B2 |
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JP5377660B2 |
The invention relates to an improved multistage process for the continuous preparation of diisocyanates by reaction of the corresponding diamines with carbonic acid derivatives and alcohols to form low molecular weight monomeric urethane...
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JP5366393B2 |
Producing isocyanates by reacting primary amines with phosgene, comprises (a) reacting phosgene and amines at above the boiling temperature of the amine and within an average contact time of 0.05-15 seconds in a reaction area, (b) coolin...
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JP5366580B2 |
Preparing isocyanate comprises: (a) reacting amine with phosgene in the presence of solvent to form liquid stream; (b) separating a gaseous stream containing e.g. phosgene to form liquid phase and gaseous phase; (c) separating the liquid...
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JP5361178B2 |
Preparation of isocyanate comprises adiabatically reacting a corresponding primary amine with phosgene at the boiling temperature of the amine with an average contact value of 0.05-15 seconds.
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JP5354851B2 |
A method for the production of 4,4'-diphenylmethanedi-isocyanate (4,4'-MDI) by reacting aniline with formaldehyde and then reacting the amine mixture with phosgene, involves separating the resulting mixture by distillation and/or crystal...
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JP5336828B2 |
To provide a method and apparatus for producing carbonyl chloride in which a supply amount of chlorine is kept equal to or less than a supply amount of carbon monoxide in terms of molar ratio so that a polyisocyanate can be prevented fro...
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JP5334558B2 |
In a rotor-stator mixer comprising a rotationally symmetrical housing (1) with a frontal plate (23) and a mixing chamber (2) having separate material inlets and an outlet (13), where an inlet (5) for first material is in the chamber rota...
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JP2013540101A |
Proposed is a process for preparing isocyanates by dissociating the corresponding carbamates, which comprises dissociating the carbamates in the presence of a heterogeneous Lewis-acidic catalyst.
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JP5322183B2 |
Disclosed is a method for efficiently producing an isocyanate compound at a low reaction temperature at a low reaction pressure without using a highly toxic phosgene and without going through a complicated process. Specifically, an isocy...
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JP5313164B2 |
The present invention is directed towards a carbamic acid ester compound which can can be used for the production of isocyanate and aromatic hydroxy compounds via a thermal decomposition reaction.
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JP5300182B2 |
Toluenediamine is produced and separated from by-products of the reaction by: a) hydrogenating dinitrotoluene in the presence of a catalyst, b) separating the catalyst, water and optionally solvent from the hydrogenation reaction mixture...
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JP5299457B2 |
The present invention relates to an uracil compound of the formula ÄIÜ: wherein W represents oxygen, sulfur, imino or C1 to C3 alkylimino; Y represents oxygen, sulfur, imino or C1 to C3 alkylimino; R<1> represents C1 to C3 alkyl or C1 ...
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JP2013173784A |
To provide a multistage method for continuously producing organic polyisocyanates, in particular diisocyanates.In a multistage method for continuously producing organic diisocyanates or polyisocyanates, the corresponding diisocyanates or...
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JP5274454B2 |
To provide a method for producing an ethylenically unsaturated group-containing isocyanate compound having an ether bond under such conditions that the ether bond is unlikely to be cleaved and the polymerization of an unsaturated group c...
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JP5264489B2 |
The present invention relates to a process for preparing isocyanates and an apparatus suitable for this purpose, and also its use. In the process, an amine and phosgene, both in the gas phase, react in the presence of an inert medium. A ...
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JP5258327B2 |
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JP5254234B2 |
The present invention relates to a hole-jetting type reactor and its applications, in particular to a process for the production of isocyanates by the phosgenation of aliphatic or aromatic diamines or triamines in the gas phase using thi...
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JP5254020B2 |
The present invention comprises a process for purifying isocyanate-comprising residues.
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JP5242678B2 |
An object of the present invention is to provide a process that enables isocyanate to be produced stably over a long period of time and at high yield without encountering problems of the prior art during production of isocyanate without ...
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JP5231241B2 |
Process for preparing diamino diphenyl methane and poly-(diamino diphenyl methane) comprising reacting aniline with formaldehyde in the presence of hydrogen chloride added in the gaseous form wherein the aniline contains 0.1 to 7 wt %, p...
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JP5226940B2 |
Preparation of isocyanates comprises phosgenation of an amine in a gas phase, where for liquid heating, evaporation and/or gas overheating of the amine one or more heat exchanger with a volume specific heat exchange area of at least 1 m ...
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