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JP2018087168A |
To provide a method for producing pentamethylene diisocyanate which can suppress decrease in flowability of a salt-forming mixture containing pentamethylenediamine hydrochloride in a salt-forming step and suppress adhesion of pentamethyl...
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JP6316491B2 |
A method for producing an isocyanate, comprising: a carbamation step of generating an N-substituted carbamate from an organic primary amine, urea and an organic hydroxy compound according to a carbamation reaction, and then recovering a ...
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JP6312214B2 |
The present invention relates to a process for preparing mixtures of diphenylmethane diisocyanates and polyphenyl polymethylene polyisocyanates by sequential reaction of benzene to nitrobenzene to aniline to polyphenyl polymethylene poly...
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JP6302838B2 |
The present invention relates to a polyisocyanate composition comprising, on the basis of the total mass of the polyisocyanate composition, 97 weight % or more of a polyisocyanate, and 2.0 mass ppm or more and 1.0×10mass ppm or less of ...
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JP6297602B2 |
The present invention relates to a process for separating an isocyanate prepared by reaction of a primary amine with an excess of phosgene in the gas phase from the gaseous crude product obtained in the reaction, wherein (i) the gaseous ...
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JP6279710B2 |
The invention relates to a method for producing diamines and polyamines of the diphenylmethane series in which, by using a coalescence auxiliary in the phase separation of the process product obtained in the scrubbing of the neutralized ...
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JP6274268B2 |
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JP6225190B2 |
The invention relates to a method for producing organic diisocyanates by reacting the corresponding diamines with phosgene in inert solvents. High-melting diamines from the series of 1,5-naphthalenediamine, tetralindiamine, 1,4-phenylene...
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JP6212187B2 |
The present invention relates to a polyisocyanate composition comprising, on the basis of the total mass of the polyisocyanate composition, 97 weight % or more of a polyisocyanate, and 2.0 mass ppm or more and 1.0×10mass ppm or less of ...
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JP6207707B2 |
A method for producing an isocyanate, comprising: a carbamation step of generating an N-substituted carbamate from an organic primary amine, urea and an organic hydroxy compound according to a carbamation reaction, and then recovering a ...
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JP2017527596A |
The present invention is a method for producing an isocyanate by reacting a corresponding primary amine with phosgene in a gas phase, via an outer cyclic flow path and then a plurality of radial flow paths. Phosgene that has passed throu...
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JP6191739B2 |
Provided is a method for producing an isocyanate compound from an amine compound and a carbonate compound directly or continuously without requiring the isolation/purification of a carbamate compound that is generated as an intermediate....
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JP6166706B2 |
Method of fractionating a mixture ofpolyisocyanates in the liquid phase, optionally in the presence of a suitable solvent or mixture of two or more solvents, by means of a selectively permeable membrane into a permeate stream and a reten...
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JP6159801B2 |
The present invention relates to a reaction method comprising a step of supplying a liquid containing at least one raw material compound and a low-boiling compound having a standard boiling point lower than a standard boiling point of th...
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JP6153525B2 |
A process according to the invention is a process to separate an initial fluid stream comprising phosgene and hydrogen chloride in at least a first and a second fluid stream, said first fluid stream being a hydrogen chloride enriched and...
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JP6149115B2 |
The present invention relates to a method for producing isocyanates by reacting amines with phosgene in liquid phase, involving the following method steps: (a) mixing a liquid amine-containing reactant flow (1) and a liquid phosgene-cont...
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JP6138253B2 |
The present invention relates to a method for working up distillation, residues from isocyanate production in which monomeric isocyanate present in distillation residues is recovered by means of a spray-dry method and the overall yield o...
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JP6140768B2 |
A method for producing a carbonyl compound of the present invention comprises a step (X) of reacting a specific compound having a urea bond with a carbonic acid derivative having a carbonyl group (-C(=O)-) under heating at a temperature ...
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JP6113824B2 |
The invention relates to a method for preparing isocyanates by phosgenating the corresponding amines, wherein low-boiling secondary components, excess phosgene, and the co-product hydrogen chloride are separated from the crude liquid iso...
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JP6087946B2 |
The present invention includes a process and apparatus for the production of methylene diphenyl diisocyanate (MDI) isomer mixtures with a low 2,2′-MDI isomer content and a high 2,4′-MDI isomer content. The resulting mixtures have an ...
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JP6078158B2 |
A method for producing trans-bis(aminomethyl)cyclohexane includes a trans-isomerization step in which cis-dicyanocyclohexane is isomerized into trans-dicyanocyclohexane by heating dicyanocyclohexane containing cis-dicyanocyclohexane in t...
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JP6072061B2 |
Proposed is a method for producing isocyanates by means of phosgenation of the respective amines in a fluidised bed reactor (R), characterised in that a gas flow (1) containing the phosgene is used as a swirl gas and keeps an inert solid...
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JP6067353B2 |
Producing isocyanates, comprises e.g. (a) reacting a stream containing a primary amine with a phosgene-containing stream to obtain a product stream comprising isocyanates, hydrogen chloride, unreacted phosgene and carbon oxides, (b) sepa...
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JP6060902B2 |
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JP2017501134A |
The present invention provides degradable isocyanate compounds having at least two isocyanate groups, methods of producing those compounds, and the use of those compounds for preparing degradable crosslinked polymers and composites. [Sel...
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JP6059799B2 |
Xylylene dicarbamate contains impurities represented by formulas (1) to (4) below at a ratio of less than 100 ppm as a total amount thereof on a mass basis. (In the above-described formulas (1) to (4), R represents a monovalent hydrocarb...
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JP6055084B2 |
A method for producing an isocyanate, comprising: a carbamation step of generating an N-substituted carbamate from an organic primary amine, urea and an organic hydroxy compound according to a carbamation reaction, and then recovering a ...
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JP6046043B2 |
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 having a content of hydrol...
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JP6025476B2 |
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JP6022039B2 |
A method for producing xylylene diisocyanate includes a thermal decomposition step of thermally decomposing xylylene dicarbamate; a first separation step of separating, from the thermal decomposition product obtained in the thermal decom...
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JP2016529239A |
Method for Producing Isocyanate The present invention phosgens the corresponding primary amine in a reactor (100) comprising at least one reaction zone (110) and a quenching zone (120) located beneath the reaction zone. With respect to t...
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JP5960680B2 |
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 40°C. The invention also relates to the isocyanate ob...
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JP2016135486A |
To provide a catalyst by which a carbamate compound can be decomposed at a fast thermal decomposition rate, an isocyanate compound can be produced at high selectivity and with a high yield, and a product material can easily be isolated.T...
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JP2016520038A |
The present invention converts aniline and formaldehyde under nonexistence of an acid catalyst, A friend knurl and water are formed, an aqueous phase is removed, and an organic friend knurl phase is further processed, It is use of a coal...
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JP5949563B2 |
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JP2016117674A |
To provide a method for producing isocyanate capable of reducing equipment cost.Primary amine, urea and/or Ni-unsubstituted carbamate and alcohol are reacted to by-produce ammonia, and further, to produce a reaction product containing a ...
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JP5931898B2 |
The invention relates to a process for preparing methylene diphenyl diisocyanate, comprising (a) the phosgenation of di- and/or polycyclic methylene diphenyl diamine, (b) the separation of the crude methylene diphenyl diisocyanate obtain...
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JP5928348B2 |
The present invention relates to a catalyst for isocyanate compound production wherein an alkali metal compound and/or an alkaline earth metal compound is supported upon a carrier, and to a method for producing the catalyst. The present ...
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JP5917794B2 |
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JP5883865B2 |
A process for the preparation of multifunctional polycarbodiimides, which are used as crosslinking agents, in which the polycarbodiimide is prepared by reacting mono- and polyisocyanates in the presence of a mono- or polyisocyanate that ...
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JP5883011B2 |
The invention relates to a method for producing isocyanates by reacting the corresponding amines with phosgene, comprising the following steps: (a) providing at least one amine-containing reactant flow and at least one phosgene-containin...
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JP5882216B2 |
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JP5877839B2 |
The present invention a process and apparatus for the production of methylene diphenyl diisocyanate (MDI) isomer mixtures with a low 2,2′-MDI isomer content and a high 2,4′-MDI isomer content. The resulting mixtures have an increased...
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JP5851488B2 |
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JP5850345B2 |
Disclosed is a rapid mixing reactor, comprising a first feed-in passage housing, a reactor housing, a second feed-in passage, a hollow blade-wheel feed distributor, a rotation shaft, and a first feed distributor, wherein the first feed-i...
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JP5848351B2 |
Embodiments of the present invention relate to a mixing apparatus. Particularly, embodiments of the present invention provide a mixing apparatus for mixing fluid components such as phosgene and amine during a highly reactive chemical rea...
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JP5849088B2 |
A Pentamethylene diisocyanate is obtained by phosgenating pentamethylenediamine or its salt obtained by a biochemical method, and contains 5 to 400 ppm of a compound represented by the general formula (1) below and a compound represented...
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JP5841676B2 |
A preparation method of an aldehyde compound of the present invention includes a step of reacting a compound represented by the following general formula (a1) with hydrogen and carbon monoxide in the presence of a metal compound includin...
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JP5840801B2 |
A preparation method of an aldehyde compound of the present invention includes a step of reacting the compound represented by the following general formula (a1) or (a2) with hydrogen and carbon monoxide in the presence of a metal compoun...
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JP5827469B2 |
Method of fractionating a mixture ofpolyisocyanates in the liquid phase, optionally in the presence of a suitable solvent or mixture of two or more solvents, by means of a selectively permeable membrane into a permeate stream and a reten...
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