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JP6843977B2 |
An isocyanate production method is characterized by having: a carbamation step in which a carbonic acid ester, an inorganic acid salt of an amino acid derivative, and a basic compound are reacted to obtain a reaction mixture containing a...
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JP6804512B2 |
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 reaction. particular a method f...
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JP2020535150A |
In the present invention, the corresponding diamine precursors, urea and hydroxy compounds are converted to diurethane monomers, these diurethanes are converted to diurethane, which is a high boiling point hydroxy compound, and finally t...
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JP2020535153A |
The present invention relates to a method for producing an organic diisocyanate, wherein a diisocyanate is obtained as a distillate by cleaving the corresponding diurethane into a diisocyanate and a hydroxy compound and separating the di...
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JP6770415B2 |
To provide a method for producing a pentamethylene diisocyanate capable of preventing pentamethylenediamine hydrochloride from adhering to a stirring vessel by suppressing deterioration of the fluidity of a salt-forming mixture containin...
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JP6757468B2 |
An isocyanate production method according to the present invention is a method in which an isocyanate is produced by subjecting a carbamate to thermal decomposition, and includes: a step of preparing a mixture liquid containing the carba...
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JP6743069B2 |
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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JP6744808B2 |
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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JP6731929B2 |
The polyphenyl polymethylene polyisocyanates can further be prepared according to the invention, prior to the thermal cleavage, by removing compounds having free amino groups or urea groups present in the carbamate crude mixture from the...
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JP6728054B2 |
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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JP6710159B2 |
The invention relates to a method for producing the isomers 1,3- and/or 1,4-xylylene diisocyanates by reacting the corresponding 1,3- and/or 1,4-xylylene diamines with phosgene in the gaseous phase.
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JP6707078B2 |
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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JP6705461B2 |
The present invention provides a process for producing an isocyanate compound such as 3-methyl-2-methoxymethyl-1-isocyanate benzene and the like. By reacting 3-Methyl-2-methoxymethyl aniline and the like with phosgene in the presence of ...
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JP6705905B2 |
An isocyanate composition according to the present invention contains: a difunctional or more-functional isocyanate compound; and 1.0 ppm by mass to 1.0 × 10ppm by mass, based on the isocyanate compound, of a compound having at least on...
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JP6700336B2 |
The xylylene diisocyanate composition according to the embodiments has a chlorine content of 100 to 1,000 ppm to improve the stability, so that the degradation of the reactivity can be prevented even when it is stored for a long period o...
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JP6693669B2 |
The invention relates to a method for producing a spectacle lens, comprising the steps of:(1) mixing an iso(thio)cyanate compound having two or more iso(thio)cyanate groups in a molecule (and comprising bis(isocyanatomethyl)benzene and/o...
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JP6675497B2 |
The method for producing pentamethylene diisocyanate includes a reaction step, in which carbonyl chloride is allowed to react with pentamethylenediamine to produce a reaction mixture containing pentamethylene diisocyanate and a tar compo...
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JP6640274B2 |
An isocyanate composition is prepared from an amine composition, which comprises (a) 99% to less than 100% by weight of m-xylylenediamine; (b) greater than 0% to 0.5% by weight of p- xylylenediamine; and (c) greater than 0% to 0.5% by we...
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JP6633218B2 |
The present invention provides a polyisocyanate composition that exhibits excellent water dispersibility and excellent external appearance and hardness of the resulting coating film. This polyisocyanate composition contains a polyisocyan...
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JP6632895B2 |
To provide a method for producing a biuret type polyisocyanate product which prevents coloring at the time of production of a polyisocyanate body, and has a small amount of a diisocyanate monomer immediately after production and during l...
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JP6621760B2 |
This invention relates to a process for operating a gas phase phosgenation plant (100) to form an isocyanate (4) by reacting an amine (2) with phosgene (1), in which the gas phase phosgenation plant is started up by first charging the pl...
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JP6621759B2 |
This invention relates to a process for operating a gas phase phosgenation plant (100) to form an isocyanate (4) by reacting an amine (2) with phosgene (1), in which the gas phase phosgenation plant is shut down by first stopping the ami...
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JP2019199421A |
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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JP2019199428A |
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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JP2019199419A |
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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JP2019199430A |
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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JP2019199422A |
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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JP2019199431A |
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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JP2019199423A |
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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JP2019199427A |
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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JP2019199420A |
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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JP2019199425A |
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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JP2019199429A |
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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JP2019199417A |
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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JP2019199418A |
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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JP6602794B2 |
in which R1, R2 and R3 are identical or different radicals and are each a saturated or unsaturated, linear or branched, aliphatic or cycloaliphatic radical or an optionally substituted aromatic or araliphatic radical having up to 18 carb...
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JP6581581B2 |
The present invention relates to a process for obtaining organic isocyanate from a phosgenation product comprising the isocyanate, comprising the following steps: a) workup to the phosgenation product, the workup comprising at least one ...
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JP2019154313A |
To provide catalysts capable of accumulating 1,5-pentamethylene diisocyanate at a higher concentration in a shorter period of time with a lesser amount of enzyme or catalytic resting cells, or a lesser amount of the processed product the...
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JP6542794B2 |
Disclosed herein are compounds of the general Formula (I), and methods of synthesizing a substituted bicyclo[1.1.1]pentane using a Group VII or Group IX transition metal compound.
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JP6535542B2 |
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JP6529156B2 |
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JP6523856B2 |
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JP6519594B2 |
By reacting 3-methyl-2-methoxymethylaniline, etc. with a phosgene compound in the presence of a tertiary amine at 10°C to 14°C in at least one kind of solvent selected from a group consisting of chlorobenzene and ortho-dichlorobenzene,...
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JP6509870B2 |
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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JP6507024B2 |
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JP6494629B2 |
The present invention relates to 2-N,N-(bis-2-aminoalkyl)-1,2-alkyldiamine derivatives of formula (I) as such, to a process for preparing the 2-N,N-(bis-2-aminoalkyl)-1,2-alkyldiamine derivatives, to the use of the 2-N,N-(bis-2-aminoalky...
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JP6475301B2 |
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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JP6416204B2 |
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 animal a...
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JP6402202B2 |
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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JP6372484B2 |
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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