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JP5586624B2 |
The present invention relates to a process for manufacturing isocyanates from an amine compound. The process comprises the steps of a) Providing chlorine; b) Providing carbon monoxide; c) Reacting said chlorine and said carbon monoxide f...
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JP5583879B1 |
The purification method of an aldehyde compound of the present invention includes a step of neutralizing a reaction solution containing an aldehyde compound by adding water and a base compound to the reaction solution, and a step of dist...
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JP2014520086A |
The present invention relates to a process for preparing polyisocyanates from natural raw material sources by starting from a biomass material and preparing a composition which comprises low molecular mass aromatics that contain per mole...
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JP5574684B2 |
Preparing aromatic isocyanates, comprises reacting aromatic primary amines with phosgene in the gas phase, above the boiling temperature of the amines, in a reactor comprising a reaction chamber which is essentially rotationally symmetri...
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JP5574603B2 |
Low-viscosity preparations of isocyanate compounds in solvents, and their use.
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JP5576390B2 |
The invention relates to a process for preparing isocyanates by reacting the corresponding amines with phosgene in the gas phase, optionally in the presence of an inert medium, in which the amine and the phosgene are first mixed and conv...
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JP5574691B2 |
Preparing meta-toluene diisocyanate comprises reacting meta-toluenediamine with phosgene in the gas phase, where: the meta-toluenediamine and phosgene are separately added into a reactor, and a gaseous meta-toluenediamine is produced by ...
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JP5567477B2 |
Disclosed are a process suited to large scale synthesis with high yield for producing oseltamivir phosphate, in which a preparation of oseltamivir phosphate which is highly safe as a pharmaceutical product can be produced, and an interme...
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JP5566149B2 |
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JP5563887B2 |
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JP5563886B2 |
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JP5563816B2 |
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JP5557841B2 |
The present disclosure relates, according to some embodiments, to apparatus, systems, and/or methods for fractionating a feed mixture comprising, for example, one or more isocyanates, light components, solvents and/or heavier components....
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JP5548684B2 |
The invention relates to a process for preparing isocyanates by reacting the corresponding amines with phosgene in the gas phase, if appropriate in the presence of at least one inert medium, the phosgene being passed into a reactor (21) ...
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JP5543474B2 |
The present disclosure relates, according to some embodiments, to apparatus, systems, and/or methods for fractionating a feed mixture comprising, for example, one or more isocyanates, light components, solvents and/or heavier components....
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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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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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