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WO/2022/146090A1 |
The present invention relates to an isocyanate compound preparation method. The objective of the present invention is to provide an isocyanate compound preparation method, which enables the recovery and reuse of materials used in a react...
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WO/2022/146088A1 |
The present invention relates to an isocyanate compound preparation method. The objective of the present invention is to provide an isocyanate compound preparation method, which enables the recovery and reuse of materials used in a react...
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WO/2022/146092A1 |
The present invention relates to a method for preparing an isocyanate compound. According to the present invention, provided is a method for preparing an isocyanate compound, the method capable of, when preparing an isocyanate compound u...
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WO/2022/136069A1 |
The present invention relates to a method for stably storing an isocyanate composition, the stably stored isocyanate composition, and a polyurethane resin prepared from the isocyanate composition.
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WO/2022/122906A1 |
The present invention relates to a process for preparing a polyisocyanate, namely a isocyanate group-terminated polyol polyanthranilic acid ester. The process comprises the step of reacting an anthranilic acid derivated selected from ant...
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WO/2022/106716A1 |
The present invention concerns a process for the preparation of isocyanates and/or polyisocyanates by reacting the corresponding amines with phosgene in a reactor, where isocyanates are obtained from a mixture of amines in gaseous or liq...
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WO/2022/106685A1 |
The invention relates to a distillation unit (100 000) which is designed for a continuous distillation process and to a method for a continuous operation for separating a liquid substance mixture (10) into two to six liquid product flows...
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WO/2022/077429A1 |
The present invention relates to the technical field of impurity separation in a phosgenation reaction process, and specifically relates to a cyclic solvent in phosgenation reaction production and an impurity removal method therefor. The...
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WO/2022/073506A1 |
An improved process for producing 1, 5-pentamethylene diisocyanate (PDI) from a cadaverine salt is described herein. The process generally comprises providing a solution comprising a cadaverine salt dissolved in an inert solvent in the p...
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WO/2022/059820A1 |
The present invention relates to a method for producing isocyanate comprising a non-chlorinated derivative that is obtained by transforming a chlorinated derivative, generated in a xylene diisocyanate production step, into a non-chlorina...
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WO/2022/047681A1 |
The present invention provides a method for preparing MDI and a method for preparing phosgene. The method for preparing MDI provided by the present invention comprises: in the presence of a solvent, subjecting a phosgene feedstock and MD...
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WO/2022/048930A1 |
The invention relates to a process for producing isocyanates by reacting the corresponding amines with phosgene in the liquid phase, comprising: (a) mixing an amine comprising feed stream, a phosgene comprising feed stream and optionally...
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WO/2022/043291A1 |
The invention relates to a production process for preparing isocyanates, during which production residues, in particular those resulting from distillation, are converted to recovery products, for example syngas, by thermal oxidative trea...
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WO/2022/041502A1 |
Disclosed herein is a method for preparing 1,5-pentane diisocyanate, comprising the following steps: (1) mixing 1,5-pentanediamine, a carbonylation agent, a first solvent and a catalyst for a carbonylation reaction, performing solid-liqu...
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WO/2022/013077A1 |
The invention relates to a method for recovering at least one aliphatic, araliphatic or cycloaliphatic diamine from a mixture containing at least 35 wt.% water and 0.2 to 60 wt.% of the at least one aliphatic, araliphatic or cycloaliphat...
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WO/2021/228977A1 |
The present invention relates to a method for operating a plant for continuous production of an isocyanate by converting a primary amine A with phosgene P whilst maintaining, based on the amino groups of the primary amine, a stoichiometr...
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WO/2021/228301A1 |
The invention relates to a process for preparing isocyanates. According to this method, (i) a first organosilicon compound that has at least one silicon atom Si1 and an entity of the formula G-I bonded thereto is, by silylation of the NH...
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WO/2021/185732A1 |
The present invention relates to a method for purifying a product flow from isocyanate synthesis, wherein the isocyanate which has passed from the product flow into the gas phase is continuously precipitated on a rotating, cooled roller ...
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WO/2021/157701A1 |
Provided are: a thiourethane resin starting material production method comprising a step in which a thiourethane resin and an active hydrogen compound are reacted to produce a thiourethane resin starting material; and a use for the thiou...
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WO/2021/157702A1 |
A polyamine compound production method comprising: a first step in which a thiourethane resin and an amine compound A are reacted to produce a polyurea compound; and a second step in which the polyurea compound and an amine compound B ar...
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WO/2021/148419A1 |
The invention relates to a method for recovering a diisocyanate that is solid at room temperature from a distillation residue originating from a production process of the diisocyanate, comprising the following steps: (i) mixing the disti...
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WO/2021/141002A1 |
The purpose of the present invention is to reduce the dialkylcarbamoyl chloride content of a (meth)acrylic acid ester compound having an isocyanate group. The present invention includes a method for producing a (meth)acrylic acid ester...
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WO/2021/122625A1 |
The invention relates to a method for producing di- and polyisocyanates of the diphenylmethane series, in which (i) the liquid product flow created in the phosgenation, (ii) the reaction mixture present in an optionally provided reactor ...
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WO/2021/119606A1 |
The disclosure provides, inter alia, safe and environmentally-friendly methods, such as flow chemistry, to synthesize isocyanates, such as methylene diphenyl diisocyanate, toluene diisocyanate, hexamethylene diisocyanate, isophorone diis...
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WO/2021/103550A1 |
Disclosed is a 1,3-bisisocyanatomethylcyclohexane composition and an optical resin prepared therefrom. The composition comprises, based on the weight of 1,3-bisisocyanatomethylcyclohexane, a) 65%-95wt% of trans-1,3-bisisocyanatomethylcyc...
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WO/2021/100131A1 |
This isocyanate production method, for continuously producing an isocyanate while suppressing side reactions, is a method for producing an isocyanate through the thermal decomposition of carbamate, and comprises: a thermal decomposition ...
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WO/2021/089737A1 |
The invention relates to a method for producing isocyanates and optionally polyurethanes by at least: synthesising (1) phosgene (20) from carbon monoxide (21) and chlorine (22); reacting (2) phosgene (20) with diamines (23) to form diiso...
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WO/2021/083459A1 |
The invention relates to a process for the synthesis of DOPA comprising a photolabile protective group and to intermediates for preparing same (I), R being selected from the group that consists of 2-nitrobenzyl,1-(2-nitrophenyl)ethyl, 7-...
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WO/2021/063760A1 |
The invention relates to a process for the distillative purification of a crude isocyanate that is obtained by the phosgenation of a corresponding amine in a distillation apparatus under vacuum, in order to obtain the corresponding isocy...
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WO/2021/052894A1 |
The present invention concerns a method for producing an isocyanate, comprising the steps of (A) reacting an amine with a stoichiometric excess of phosgene, using an aromatic solvent of the formula C6H6–XClX, where X = 1 or 2, (a) as a...
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WO/2021/042251A1 |
The present invention belongs to the technical field of waterborne polyurethane resins, and in particular relates to a method for preparation of a polyisocyanate by a photochemical reaction and a method for preparing a waterborne polyure...
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WO/2021/039660A1 |
The present specification discloses a method for producing an isocyanate compound. The present invention relates to a method for producing a compound represented by formula (2), wherein in the presence of a water-immiscible solvent and w...
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WO/2021/033504A1 |
A method for producing a carbonyl compound by means of a flow reaction, wherein: a triphosgene solution is introduced into a flow path (I); the triphosgene solution comes into contact with a solid catalyst, which is affixed to at least a...
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WO/2021/033505A1 |
A method for producing a carbonyl compound by means of a flow reaction, wherein: a triphosgene solution, a tertiary amine solution and an active hydrogen-containing compound solution are introduced into different flow paths and are cause...
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WO/2021/027953A1 |
Disclosed is a preparation method for preparing diphenylmethane diisocyanate. The preparation method comprises: under a catalyst condition, performing a pyrolysis reaction on diphenylmethane dicarbamate in an inert solvent having a boili...
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WO/2021/028300A1 |
The present invention relates to a urethane group-containing polyisocyanate prepared by reacting a system containing organic polyhydroxy compounds and excess toluene diisocyanate and, a process for preparing the same, a product containin...
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WO/2021/008908A1 |
The invention relates to a method for producing polyisocyanates having a low monomer content, said method comprising the following steps: (i) modifying at least one monomeric diisocyanate to obtain a mixture containing at least one polyi...
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WO/2020/239716A1 |
The invention relates to a method for recycling polyurethane material waste (18a) for producing chemical feedstock for the production of isocyanates (10a) and then polyurethanes (16a), in which method, proceeding from polyurethane materi...
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WO/2020/225088A1 |
The invention relates to a method for the purification of at least one isocyanate selected from the group consisting of aliphatic, cycloaliphatic and araliphatic isocyanates and mixtures thereof, to a method for preparing at least one is...
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WO/2020/212510A1 |
The present invention is directed to methods for the asymmetric synthesis of esketamine. The present invention is further directed to key intermediates in the asymmetric esketamine synthesis. In one embodiment, the invention is an asymme...
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WO/2020/201277A1 |
The present invention relates to a drying apparatus for evaporating volatile constituents from a starting material to be dried, to a process for producing an isocyanate using this drying apparatus and to the use of the drying apparatus f...
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WO/2020/196553A1 |
The purpose of the present invention is to provide a method that enables efficient and safe production of an N-substituted trihaloacetamide which also serves as a synthetic intermediate for isocyanate compounds, carbamate compounds, urea...
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WO/2020/163092A1 |
Phenyl isocyanates are removed from a solvent stream obtained from an MDI and/or PMDI manufacturing process by reaction in the presence of a carbodiimidization catalyst to form the corresponding N,N-diphenylcarbodiimides. The N,N-dipheny...
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WO/2020/132936A1 |
Disclosed is a method for preparing an isocyanate in a gaseous phase, comprising feeding, in the presence or absence of an inert gas, an amine-containing gas stream and a phosgene-containing gas stream into a reaction region, allowing th...
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WO/2020/124622A1 |
Disclosed is a method for preparing isophorone diisocyanate. The method comprises the following steps: (1) reacting isophorone with hydrogen cyanide in the presence of a catalyst to obtain isophorone nitrile; (2) reacting the isophorone ...
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WO/2020/126716A1 |
A method for manufacturing an isocyanate compound represented by formula (2) (2) wherein R1 represents a methyl group,an ethyl group,a cyclopropyl group, a chlorine atom, a bromine atom, or a methoxy group; and R2 represents an alkyl gro...
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WO/2020/100971A1 |
The purpose of the present invention is to provide a method that makes it possible to safely and efficiently produce an isocyanate compound. This production method for an isocyanate compound is characterized by including: a step for irra...
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WO/2020/091867A1 |
Monoisocyanate impurities are removed from a process stream obtained when solvent is separated from a polyisocyanate product. The monoisocyanates are reacted with amine compounds at specific molar ratios to produce ureas. The ureas can b...
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WO/2020/083830A1 |
The invention relates to a method for the thermal separation of a mixture comprising a first main component and a second main component, the boiling point of the first main component being lower than the boiling point of the second main ...
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WO/2020/040049A1 |
This composition includes a compound (A) represented by general formula (1) and a compound (B) represented by general formula (2), wherein the contained amount of the compound (B) is 0.00002-2.0 parts by mass with respect to 100 parts by...
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