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JP2023091331A |
To provide a production method of an isocyanate, which uses a carbamate as a raw material, in which a side reaction is suppressed and which has a high yield.A production method of an isocyanate is a method for producing an isocyanate by ...
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JP2023526598A |
The present invention continuously converts an isocyanate by converting a primary amine A with phosgene P in the liquid phase in the presence of a solvent L while maintaining a stoichiometric excess of phosgene to the amino groups of the...
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JP7285924B2 |
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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JP7276341B2 |
The invention is related to a composition excellent in stability during storage and excellent stability during utilization, and related to a method of producing the composition. The composition comprises a compound (A) represented by gen...
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JP7276342B2 |
A composition is provided including a compound (A) represented by Formula (1) and a compound (B) represented by Formula (2), wherein the compound (B) is contained in an amount of 0.00002 to 0.2 parts by mass with respect to 100 parts by ...
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JP7239953B2 |
The objective of the present invention is to provide a method for producing a carbonyl halide efficiently to the used halogenated methane. The method for producing a carbonyl halide according to the present invention is characterized in ...
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JP2023036548A |
To provide a xylylene diisocyanate composition and an optical polymerizable composition including the same that allow manufacture of an optical lens having high transmittance and improved optical uniformity.A xylylene diisocyanate (XDI) ...
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JP7227973B2 |
The present invention relates to a plant for preparing a purified isomeric monomer from a mixture of different isomeric monomers, wherein the plant comprises a distillation apparatus, which comprises:a) a distillation column including a ...
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JP7218311B2 |
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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JP2023500262A |
The present invention synthesizes phosgene (20) from at least carbon monoxide (21) and chlorine (22) (1); and hydrogen chloride (25); providing a carbon dioxide gas stream (31); and cleaning (4) the carbon dioxide gas stream (31) of addi...
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JP7199546B2 |
There are provided a method of producing a carbonyl compound by a flow type reaction, including introducing a triphosgene solution into a flow channel (I), bringing the triphosgene solution into contact with a solid catalyst immobilized ...
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JP7194822B2 |
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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JP2022550763A |
The present invention relates to a process for the distillative purification of crude isocyanates obtained by phosgenation of the corresponding isocyanates in a distillation apparatus under vacuum to obtain the corresponding isocyanates,...
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JP2022547814A |
The present invention is a process for producing isocyanates by using (A) an amine and a stoichiometric excess of phosgene (a) as a diluent during the reaction and/or (b) the reaction of the amine with phosgene. (referred to as quench) a...
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JP2022170318A |
To provide a method for producing an isocyanate in high purity and yield, while suppressing contamination by by-products in a purification step.The present invention discloses a method for obtaining an isocyanate represented by general f...
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JP7165508B2 |
To provide a production method of isocyanate for producing isocyanate continuously by suppressing a side reaction.A production method of isocyanate is a method for producing isocyanate by pyrolysis of carbamate. The method includes a pyr...
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JP7165509B2 |
To provide a method for producing isocyanate that suppresses a side reaction and continuously produces isocyanate.The present invention provides a method for producing isocyanate by pyrolysis of carbamate, the method including: a pyrolys...
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JP7157810B2 |
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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JP7155125B2 |
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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JP7144540B2 |
The present invention relates to a method for preparing aliphatic isocyanate. More specifically, the present invention relates to a high purity isocyanate preparation method that can effectively recover unreacted materials and recycle th...
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JP2022540452A |
The present invention relates to a process for producing polyisocyanates with low monomer content, said process comprising the steps of: (i) modifying at least one monomeric diisocyanate to contain at least one polyisocyanate and unreact...
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JP7126218B2 |
The diisocyanate composition according to an embodiment of the present invention comprises, in the composition, a benzyl isocyanate having a methyl group in an amount of 5 ppm to 200 ppm, an aromatic compound having a halogen group in an...
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JP7126217B2 |
The diamine composition according to an embodiment of the present invention comprises a benzylmonoamine having a methyl group in an amount of 10 ppm to 2,000 ppm in the composition. When it is used for the preparation of a diisocyanate c...
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JP7116733B2 |
The present invention relates to a distributor device (10000) for the even distribution of a fluid (10) into 2 or more fluid streams each containing gas (11) and liquid (12), with a falling film evaporator (100000), in which the distribu...
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JP7114109B2 |
The present invention is directed to processes for producing isocyanates and isocyanate derivatives from epoxide and carbon monoxide reagents. In preferred embodiments, the processes include a step for providing carbonylation of an epoxi...
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JP7111505B2 |
To provide a method for producing pentane diisocyanate, capable of suppressing generation of a chlorine derivative, and improving yield of pentane diisocyanate.The method for producing pentane diisocyanate comprises: supplying pentane di...
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JP7111749B2 |
The present invention relates to a method for producing purified phosgene vapor, comprising the following steps: 1) providing a gas flow obtainable from the reaction of chlorine with carbon monoxide and comprising phosgene and carbon mon...
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JP2022532067A |
The present invention comprises a method for purifying at least one isocyanate selected from the group consisting of aliphatic, alicyclic and aromatic aliphatic isocyanates and mixtures thereof, from aliphatic, alicyclic and aromatic ali...
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JP7098653B2 |
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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JP7093183B2 |
Methods for the preparation of diisocyanates by the reaction of the corresponding primary diamines with phosgene in the gas phase are described, wherein the pressure in the diamine evaporation chamber during the transfer of the diamine i...
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JP2022526915A |
The present invention comprises a drying device that evaporates volatile components from the starting material to be dried, a process for producing isocyanate using this drying device, distillation residual distribution, oil-impregnated ...
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JP2022078234A |
To provide a method of producing carbamate, and a method of producing isocyanate.A method for producing carbamate includes the following process (1) and process (2): (1) the process of producing a compound (A) having an urea bond at a te...
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JP7071280B2 |
Disclosed is to a method for producing xylylene diisocyanate (XDI), in particular meta-xylylene diisocyanate (mXDI), including the following steps: a) phosgenation of xylylene-diamine (XDA), in particular m-xylylene-diamine (mXDA) in the...
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JP7060697B2 |
Disclosed is a light colored modified isocyanate mixture and a preparation method thereof. The method comprises the following steps: a) reacting isocyanate groups of a raw material isocyanate under the action of a phospholenecatalyst, an...
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JP2022519285A |
The phenylisocyanate is removed from the solvent stream obtained from the MDI and / or PMDI production process by reaction in the presence of a carbodiimidization catalyst to form the corresponding N, N'-diphenylcarbodiimide. The N, N'-d...
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JP7022113B2 |
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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JP7013372B2 |
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 least one separating wall. ...
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JP6980949B1 |
A method for producing a polyamine compound, which comprises a first step of reacting a thiourethane resin with an amine compound A to produce a polyurea compound, and a second step of reacting a polyurea compound with an amine compound ...
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JP6968160B6 |
The present invention relates to a new process for preparing polyisocyanates containing isocyanurate groups and being flocculation-stable in solvents from (cyclo)aliphatic diisocyanates.
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JP6952026B2 |
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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JP6951455B2 |
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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JP6940694B2 |
The present invention relates to a method for preparing an aliphatic isocyanate capable of suppressing the occurrence of side reactions and the production of by-products. The method for preparing an aliphatic isocyanate comprises a step ...
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JP6937847B2 |
A method is provided for collecting a compound of formula (III) (in which R31 is a monovalent to trivalent organic group and n31 is an integer of 1 to 3) from a liquid phase component that is formed as a by-product in a method for produc...
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JP6932768B2 |
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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JP6913081B2 |
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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JP6913083B2 |
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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JP2021095357A |
To provide a method for producing a useful carbon dioxide derivative from carbon dioxide with low energy.An amine is caused to absorb carbon dioxide, and without separating the carbon dioxide, it is then reacted with an acid catalyst and...
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JP6893927B2 |
The invention relates to the production of isocyanates by means of phosgenation of the corresponding primary amines in the gas phase, wherein the reactant flows of amine and phosgene are fed separately to a reactor through a pre-heated i...
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JP6876803B2 |
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 column during toluene diisocyanat...
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JP6856756B2 |
Provided is a method capable of preparing high-purity aliphatic isocyanate, particularly, xylylene isocyanate in a high yield in a simple manner without an additional separate process, wherein when aliphatic isocyanate is prepared using ...
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