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WO/2020/040050A1 |
Provided are: a composition that has excellent stability during storage and excellent stability during use; and a production method for the composition. The composition according to the present invention includes a compound (A) represent...
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WO/2020/040045A1 |
Provided are: a composition that has excellent stability during storage and excellent stability during use; and a production method for the composition. This composition includes a compound (A) represented by general formula (1), and a c...
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WO/2020/027977A1 |
Phosgene is mixed with an organic polyamine to produce polyisocyanate compounds. A phosgene flow is established in a conduit (15), and the organic polyamine is injected into the phosgene flow. A constricted region (4) of the conduit (15)...
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WO/2020/016118A1 |
The present invention relates to a method for producing oligomeric polyisocyanates with subsequent fractional liquid-liquid extraction, wherein a solvent pair which forms two phases in the extraction and comprises a first solvent system ...
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WO/2020/016142A1 |
The invention relates to a method for recovering a diisocyanate which is solid at room temperature from a distillation residue from a process for producing the diisocyanate, comprising the following steps: (i) mixing the distillation res...
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WO/2019/245192A1 |
The present invention relates to a method for preparing aliphatic isocyanates. More particularly, the present invention relates to a method for preparing isocyanates with high purity that can efficiently recover unreacted materials and r...
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WO/2019/235862A1 |
Provided is a method for manufacturing diisocyanate and an optical lens in which, during the manufacture of diisocyanate from diamine via diamine hydrochloride, use is made of an aqueous hydrochloric acid solution and an organic solvent ...
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WO/2019/221210A1 |
Provided are a method for producing a carbamate, said method comprising the following steps (1) and (2), etc.: (1) a step for producing compound (A) having a urea bond by using an organic primary amine having at least one primary amino g...
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WO/2019/207494A1 |
Disclosed is a process for the synthesis of pimavanserin base with a high yield and purity, which comprises: a) converting tert-butyl-N-[(4-propan-2-yloxyphenyl)methyl]carbamate (Formula (I)) to 1-(isocyanatomethyl)-4-propan-2-yloxybenze...
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WO/2019/193073A1 |
The invention relates to a method for recovering monomer diisocyanates, which are solid at room temperature, from a distillation residue, said method comprising the following steps: (i) preparing at least one residue which contains diiso...
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WO/2019/185608A1 |
The present invention relates to a catalyst for preparing carbamates, in particular aromatic carbamates, comprising a binary oxide having the formula Li_xMx02, wherein 1. is a metal selected from the lanthanoid series and M is a metal se...
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WO/2019/145380A1 |
The invention relates to a process for the preparation of aliphatic, cycloaliphatic or araliphatic isocyanates by reacting at least one primary organic amine with a stoichiometric excess of phosgene in the gas phase, comprising the steps...
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WO/2019/134909A1 |
The invention relates to a method for producing methylene-diphenylene-diisocyanate and optionally a mixture of methylene-diphenylene-diisocyanate and polymethylene-polyphenylene-polyisocyanate, wherein, in a step α), a fraction (142) co...
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WO/2019/131855A1 |
Provided is a method for collecting a compound represented by general formula (III) (in the formula, R31 is a monovalent to trivalent organic group and n31 is an integer 1-3) from a liquid phase component that is formed as a by-product i...
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WO/2019/132491A1 |
An embodiment relates to an isocyanate composition with improved stability and reactivity and a plastic optical lens using the same. The isocyanate composition has improved stability since the content of chlorine in the composition is ad...
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WO/2019/115213A1 |
The present invention relates to a plant for preparing a purified isomeric methylene diphenyl diisocyanate monomer from a mixture of different isomeric monomers, wherein the plant comprises a distillation apparatus, which comprises: a) a...
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WO/2019/104888A1 |
Disclosed is an imine-type quaternary ammonium salt catalyst, wherein the catalyst has a general structure formula shown by formula I below; in the formula, R1 and R2, respectively, are independently selected from C1-C20 linear alkyl or ...
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WO/2019/076099A1 |
Disclosed are a light color modified isocyanate mixture and a preparation method therefor. The method comprises the following steps: a) reacting isocyanate groups of a raw material isocyanate under the action of a phosphorus heterocyclic...
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WO/2019/063295A1 |
The present invention relates to a process for the preparation of organic diisocyanates by cleaving the corresponding diurethanes into the diisocyanate and a hydroxy compound and separating the diisocyanate from the hydroxy compound by d...
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WO/2019/063296A1 |
The present invention relates to a multistep process for the preparation of organic diisocyanates by converting the corresponding diamine precursors, urea and hydroxy compounds into monomeric diurethanes, converting these diurethanes int...
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WO/2019/048371A1 |
The invention relates to a method for cleaning a phosgene-conducting apparatus by pressurization with ammonia gas to constant pressure. In this way, phosgene residues in the apparatus to be cleaned are decomposed effectively.
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WO/2019/048644A1 |
The present invention provides a process for quenching, in a quenching zone, a gaseous reaction mixture comprising a diisocyanate, phosgene and hydrogen chloride that is obtained in a reaction zone upstream of the quenching zone by phosg...
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WO/2019/050236A1 |
The present invention relates to a method for preparing a high-purity aliphatic isocyanate comprising an aliphatic polyisocyanate, wherein in the method, the occurrence of side reactions or the production of byproducts can be suppressed....
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WO/2019/048386A1 |
The invention relates to a method for cleaning a phosgene conducting apparatus, comprising: washing the apparatus with hot inert gas, followed by washing the apparatus with cold inert gas; conveying gaseous ammonia for breaking down phos...
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WO/2019/043180A1 |
The invention relates to a method for producing an isocyanate, wherein a carbamate or thiolcarbamate is converted, in the presence of a catalyst, with separation of an alcohol or thioalcohol, at a temperature of at least 150 °C, to the ...
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WO/2019/026425A1 |
Provided is a flow reactor with which safety can be ensured even if a leak occurs at a line connecting part. The flow reactor is provided with at least one line structure that comprises a feedstock supply line, a reactor section for reac...
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WO/2019/007834A1 |
The invention relates to a method for operating a production plant for producing a chemical product (1) by reacting a H-functional reactant (2) with phosgene (3) during an interruption in production when taking at least one plant part of...
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WO/2019/002121A1 |
The present invention relates to a method for producing purified phosgene vapour, comprising the following steps: 1) providing a gas flow obtainable from the reaction of chlorine with carbon monoxide and comprising phosgene and carbon mo...
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WO/2018/231843A1 |
A compound according to Formula (I):, wherein Z is: (II).
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WO/2018/224529A1 |
The invention relates to a method for producing isocyanates by phosgenating the corresponding primary amines in the gas phase, wherein the raw gaseous reaction product mixture is cooled and partially condensed by being brought into conta...
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WO/2018/224530A1 |
The invention relates to a method for producing an isocyanate by phosgenating the corresponding primary amine in the gas phase, wherein the gaseous reaction product mixture is cooled by being brought into contact with at least one flow o...
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WO/2018/212206A1 |
This isocyanate production method is characterized by having: a carbamation step for reacting a carbonic acid ester, an inorganic acid salt of an amino acid derivative, and a basic compound with one another, and obtaining a reaction mixt...
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WO/2018/210592A1 |
The present invention relates to a polyisocyanate (P) of general formula (I), the method for producing the polyisocyanate (P) of general formula (I), and the use of the polyisocyanate (P) of general formula (I) as a cross-linking reagent...
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WO/2018/212208A1 |
This isocyanate production method for producing an isocyanate by subjecting a carbamate to thermal decomposition has: a step for preparing a liquid mixture which includes a carbamate, an inert solvent, and a polyisocyanate compound; a st...
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WO/2018/184980A1 |
The invention relates to a cleaning device for separating an organic isocyanate produced by the reaction of an organic amine with a stoichiometric excess of phosgene in the gas phase from the gaseous raw product obtained in the reaction,...
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WO/2018/185168A1 |
A process for preparing an aromatic isocyanate by direct carbonylation of a nitro aromatic compound by reacting the nitro aromatic compound with carbon monoxide in the presence of a catalyst, characterized in that the catalyst contains a...
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WO/2018/164894A1 |
A process for preparing an isocyanate product includes providing a phosgene inlet stream and an amine in solvent inlet stream to a phosgenation mixer, the amine in-solvent inlet stream including one or more amines and one or more inert s...
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WO/2018/134238A1 |
The invention relates to a method for extracting diisocyanates that are solid at room temperature from a distillation residue, comprising the following steps: (i) providing at least one residue containing diisocyanates that are solid at ...
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WO/2018/124526A1 |
The present invention provides a production method which can produce high purity aliphatic isocyanates, especially xylene isocyanate, in a high yield through a simple method without adding a separate step by adding a side reaction inhibi...
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WO/2018/114846A1 |
The industrial scale preparation of isocyanates gives rise to distillation bottom streams that are in need of further workup. These distillation bottom streams still also contain, as well as a distillation residue consisting of compounds...
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WO/2018/110947A1 |
The present invention relates to a toluene diisocyanate purification method enabling acquisition of a product having a small amount of dimers in a final product by means of using a reactive dividing wall distillation column during toluen...
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WO/2018/087415A1 |
The invention relates to a method for obtaining polymers bearing isocyanate groups from amino polymers, with both aromatic and aliphatic amines, in a simple manner and under mild conditions. The polymers bearing isocyanate groups can be ...
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WO/2018/079502A1 |
This pentamethylene diisocyanate production method comprises: a reaction step for reacting carbonyl chloride and pentamethylene diamine with each other so as to obtain a reaction mixture containing pentamethylene diisocyanate and contain...
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WO/2018/046622A1 |
The invention relates to a process for preparing liquid, storage-stable isocyanate mixtures having carbodiimide (CD) and/or uretonimine (UI) groups or prepolymers derived therefrom, wherein (i) in a first step a starting isocyanate which...
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WO/2018/041799A1 |
The invention relates to a method for producing isocyanates, according to which exhaust flows provided for the combustion are guided through an adsorption device before being supplied into the exhaust gas combustion process, and are ther...
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WO/2018/033536A1 |
The present invention relates to a process for producing isocyanates in process chains, each of which produce an isocyanate end product via at least one intermediate product, wherein the heat energy liberated in a first production plant ...
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WO/2018/002342A1 |
The present invention relates to a method and a system for separating and treating impurities from a hydrogen chloride liquid mixture, and particularly relates to a method and a system for separating and treating impurities from a hydrog...
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WO/2017/174765A1 |
The invention relates to a method for producing xylylene diisocyanate (XDI), in particular meta-xylylene diisocyanate (mXDI), comprising the following steps: a) phosgenation of xylylene-diamine (XDA), in particular m-xylylene-diamine (mX...
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WO/2017/148795A1 |
The present invention relates to the use of isophthalic acid dichloride for increasing the storage stability of xylylene diisocyanate and to compositions containing xylylene diisocyanate and isophthalic acid dichloride.
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WO/2017/104709A1 |
Provided is a production method for an isocyanate compound such as a 3-methyl-2-methoxymethyl-1-isocyanate benzene. An isocyanate compound such as 3-methyl-2-methoxymethyl-1-isocyanate benzene can be produced at high yield as a result of...
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