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WO/2017/093215A1 |
The invention relates to the production of isocyanates by means of phosgenation of the corresponding primary amines in the gas phase, wherein the educt flows of amine and phosgene are fed separately to a reactor through a pre-heated iner...
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WO/2017/076551A1 |
The invention relates to a distillation column for separating a multicomponent mixture into at least three fractions. The distillation column has at least one separating wall and at least one material exchange element (1) above the at le...
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WO/2017/063883A1 |
The invention relates to a method for preparing an aromatic polyisocyanate in an isocyanate plant comprising a reaction section for a phosgenation reaction, wherein a primary aromatic amine is reacted with phosgene compounds in a reactio...
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WO/2017/055311A1 |
The invention relates to a continuously operated method for producing isocyanates by reacting the corresponding amines with phosgene. When changing the target production capacity starting from a starting state with a specified production...
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WO/2017/050776A1 |
The invention relates to a method for an economically and technically improved embodiment of a production interruption in a production method for isocyanates by phosgenation of the corresponding amines, in which the entire production pla...
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WO/2017/013154A1 |
The invention relates to a method for producing a cyclic isocyanate (B) on the basis of a composition (Z) which has at least one component (A) that has at least one cycloalkane ring with at least four ring carbon atoms. The cycloalkane r...
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WO/2017/009311A1 |
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 reacti...
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WO/2017/001320A1 |
The invention relates to an improved process for making available, for an intended downstream application (i.e. for a chemical reaction), the hydrogen chloride by-product that is produced during production of an isocyanate by phosgenatio...
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WO/2017/001322A1 |
The present invention relates to a continuous process for preparing a polyisocyanate, in which a polyamine and phosgene are first converted predominantly to carbamoyl chloride and amine hydrochloride and only in minor proportions to poly...
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WO/2016/198404A1 |
The invention relates to a method for the preparation of diisocyanates by the reaction of the corresponding primary diamines with phosgene in the gas phase, wherein the pressure in the diamine evaporation chamber during the transfer of t...
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WO/2016/193245A1 |
The present invention relates to an isocyanate composition, comprising: a1) a toluene diisocyanate residue, wherein the toluene diisocyanate residue is selected from the distillation residue of toluene diisocyanate prepared by phosgene m...
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WO/2016/177761A1 |
The present invention relates to a process for the preparation of an isocyanate compound comprising the steps of: a) Reacting an amine compound A having at least one primary amino group with CO2 and an organotin compound S having at leas...
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WO/2016/156188A1 |
The invention relates to a process for preparing isocyanates by carbamate dissociation, in which liquid carbamate (3) and a gaseous auxiliary (11) are introduced into a reactor (1) so that a continuous liquid phase in which the gaseous a...
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WO/2016/142475A1 |
The invention relates to a method for separating a phosgene- and hydrogen chloride-containing material flow (5), wherein the hydrogen chloride- and phosgene-containing material flow (5) is supplied to a distillation column (1), a phosgen...
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WO/2016/120167A1 |
The invention relates to polyphenylene polymethylene polyisocyanates having an NCO number of at least 29% and containing less than 2 wt% of carbamides, less than 8 wt% of carbodiimides or uretonimines, and less than 1000 ppm of organic c...
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WO/2016/103283A1 |
The present invention provides bio-based aromatic diisocyanate of formula (I). [Formula should be inserted here] wherein X is –OCH3, Y is selected from -H or –OCH3, and m = 0-12. The present invention further provides a method for pr...
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WO/2016/098561A1 |
By reacting 3-methyl-2-methoxymethyl aniline, etc. with a phosgene compound in the presence of a tertiary amine at 10°C-14°C in at least one kind of solvent selected from a group consisting of chlorobenzene and ortho-dichlorobenzene, a...
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WO/2016/048695A1 |
A compound for imparting water repellency and optionally stain release to substrates wherein the compound is prepared by reacting (a) at least one isocyanate group-containing compound, (b) at least one isocyanate-reactive compound and (c...
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WO/2016/042124A1 |
The invention relates to a method for producing isocyanates by reacting the corresponding primary amines with phosgene in the gas phase, wherein the phosgene is injected into the gaseous amine flow in the interior of a flow tube via an o...
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WO/2016/042125A1 |
The invention relates to a method for producing 1,5-pentanediisocyanate (PDI) by reacting 1,5-pentanediamine (PDA) with phosgene in the gas phase.
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WO/2015/188389A1 |
A heater for heating and vaporizing droplets in gas stream, comprising a heater housing and a heater body located inside the heater housing, wherein the heater housing is provided with an airflow inlet and an airflow outlet, the airflow ...
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WO/2015/162106A1 |
The invention relates to a method for producing isocyanates by reacting primary amines with phosgene in a solvent, the solvent containing a dialkyl carbonate.
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WO/2015/155367A1 |
The invention relates to a composition for producing transparent polythiourethane bodies, containing or consisting of A) a polyisocyanate component that contains at least one polyisocyanate having an isocyanate group functionality of at ...
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WO/2015/155366A1 |
The invention relates to a composition for producing transparent polythiourethane bodies containing or consisting of A) a polyisocyanate component containing at least one polyisocyanate with a functionality of isocyanate groups of at lea...
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WO/2015/149381A1 |
Disclosed are a solvent refining method for isocyanate prepared by the phosgene method and multistage absorbing towers used in same. Solvent to be refined which contains water, iron, and/or phosgene , hydrogen chloride and other material...
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WO/2015/144658A1 |
The invention relates to a method for preparing isocyanates by the phosgenation of the corresponding amines in which problems resulting from the formation of deposits in apparatuses of the reaction segment during activation (starting) an...
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WO/2015/144681A1 |
The invention relates to a method for operating a gas-phase phosgenation plant (100) for reacting an amine (2) with phosgene (1) to give the corresponding isocyanate (4), wherein in order to start up the gas-phase phosgenation plant (100...
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WO/2015/144682A1 |
The invention relates to a process for operating a gas phase phosgenation plant (100) for reacting an amine (2) with phosgene (1) to give the corresponding isocyanate (4), in which the gas phase phosgenation plant (100) is shut down by f...
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WO/2015/121211A1 |
A process for extracting a phosgene compound, comprising providing a membrane extracting unit comprising at least one extracting cell that comprises at least one membrane contactor module having at least two sides, a gas side and a liqui...
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WO/2015/091807A1 |
The invention relates to a method for separating isocyanate monomers from isocyanate-containing mixtures by supplying the mixture in a solvent and dialyzing the dissolved mixture against the solvent by means of a permeable membrane havin...
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WO/2015/081610A1 |
Degradable isocyanate compounds, methods for making these compounds, and uses of these compounds for preparing degradable cross-linked polymers and composite materials are provided.
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WO/2015/024859A1 |
The present invention relates to a process for obtaining an organic isocyanate from a phosgenation product comprising the isocyanate, comprising the following steps: a) workup of the phosgenation product, the workup comprising at least o...
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WO/2015/025773A1 |
This method for producing an m-xylylene diisocyanate contains: a reaction step for generating a bisamide compound by reacting, in the presence of an acidic liquid, a monohalogenated benzene, formaldehyde, and an amide compound indicated ...
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WO/2015/016148A1 |
In the present invention, the method for producing trans-bis(aminomethyl)cyclohexane includes the following: a trans isomerization step of isomerizing cis-dicyanocyclohexane into trans-dicyanocyclohexane by heating dicyanocyclohexane, wh...
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WO/2015/016263A1 |
The present invention relates to a reaction method having a step for supplying a liquid including at least one species of a raw material compound and a low-boiling compound having a standard boiling point lower than the standard boiling ...
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WO/2014/189120A1 |
The purpose of the present invention is to provide, with a high degree of reproducibility, a catalyst which can be used to produce isocyanate compounds with a high degree of selectivity and at high yield, and which can be easily separate...
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WO/2014/173856A1 |
The present invention provides a process for preparing di- and polyamines from the diphenylmethane series by converting aniline and formaldehyde in the absence of an acid catalyst to give aminal and water, removing the aqueous phase and ...
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WO/2014/166977A1 |
The invention relates to a method for producing diamines and polyamines of the diphenylmethane series, wherein first aniline and formaldehyde are reacted in the absence of an acidic catalyst to form a reaction mixture containing aminal a...
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WO/2014/166901A1 |
The present invention relates to a process for the preparation of di- 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...
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WO/2014/163016A1 |
This xylylene dicarbamate contains impurities represented by formulas (1)-(4) in a ratio such that the total thereof constitutes less than 100ppm on a mass basis. (In formulas (1)-(4), R represents a monovalent hydrocarbon group.)
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WO/2014/163017A1 |
This method for producing xylylene diisocyanate is provided with: a pyrolytic decomposition step for pyrolytically decomposing xylylene dicarbamate; a first separation step for separating, from the pyrolytic decomposition product obtaine...
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WO/2014/157636A1 |
A method for producing isocyanate, said method comprising: a carbamation step for producing an N-substituted carbamate by a carbamation reaction using an organic primary amine, urea and an organic hydroxy compound, and then collecting fi...
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WO/2014/122180A1 |
The invention relates to a method for separating an isocyanate, which was produced by reacting a primary amine with an excess of phosgene in the gas phase, from the gaseous raw product obtained in the reaction, wherein (i) the gaseous ra...
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WO/2014/091011A1 |
The invention provides a method of a toluenediamine (TDA) phosgenation in a gaseous phase in a reactor of a specific design. The method, which, due to suitable mixing of reagents allows to obtain high selectivity of the course of the TDA...
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WO/2014/082910A1 |
The invention relates to a method, preferably a multistage method, for continuously producing organic polyisocyanates, preferably diisocyanates, particularly preferably aromatic, aliphatic, or cycloaliphatic diisocyanates, by reacting th...
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WO/2014/073672A1 |
This method for producing an aldehyde compound comprises a step for reacting a compound represented by general formula (a1) or general formula (a2) with hydrogen and carbon monoxide in the presence of a phosphorus compound and a metal co...
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WO/2014/073664A1 |
This method for producing an aldehyde compound comprises a step for reacting a compound represented by general formula (a1) with hydrogen and carbon monoxide in the presence of a phosphorus compound and a metal compound that contains 0.0...
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WO/2014/073663A1 |
This method for purifying an aldehyde compound comprises: a step for neutralizing a reaction solution, which contains an aldehyde compound that is obtained by reacting a compound represented by general formula (a1) or (a2) with hydrogen ...
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WO/2014/069605A1 |
The present invention relates to a polyisocyanate composition which comprises, based on the total mass of the polyisocyanate composition: 97 weight% or more of a polyisocyanate; 2.0 mass ppm to 1.0×104 mass ppm of a compound which is di...
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WO/2014/064128A1 |
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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