Preparation method for methyl isocyanate

Preparation method for methyl isocyanate

The invention discloses a preparation method for methyl isocyanate (iso-ester for short), comprising the following steps of: mixing methylaminoformyl chloride with a non-ozone-depleting substance (ODS) trichloromethane solvent to form a 15-25% methylaminoformyl/trichloromethane organic solution; con...

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Hauptverfasser: XIONG QIANZHENG, XIAO XUHUI, ZANG YANGLING, WANG XIAOGUANG, LIAO LANGUI
Format: Patent
Sprache:chi ; eng
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ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
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creator XIONG QIANZHENG
XIAO XUHUI
ZANG YANGLING
WANG XIAOGUANG
LIAO LANGUI
description The invention discloses a preparation method for methyl isocyanate (iso-ester for short), comprising the following steps of: mixing methylaminoformyl chloride with a non-ozone-depleting substance (ODS) trichloromethane solvent to form a 15-25% methylaminoformyl/trichloromethane organic solution; continuously decomposing via a decomposer; performing product and solvent separation on the decomposition solution via a cyclone-type steam-liquid separator; and rectifying via a coarse esterification tower and a fine esterification tower to obtain methyl isocyanate having a purity of greater than 99%. The reaction equation is shown in the specification; and in the preparation method disclosed by the invention, with the adoption of a process taking the non-ODS substance, namely, trichloromethane, as the solvent of the decomposition reaction, and with the adoption of the cyclone-type steam-liquid separator, ODS substances with damages on environment, such as benzene, methylbenzene and chlorobenzene, are replaced, and t
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The reaction equation is shown in the specification; and in the preparation method disclosed by the invention, with the adoption of a process taking the non-ODS substance, namely, trichloromethane, as the solvent of the decomposition reaction, and with the adoption of the cyclone-type steam-liquid separator, ODS substances with damages on environment, such as benzene, methylbenzene and chlorobenzene, are replaced, and t</description><subject>ACYCLIC OR CARBOCYCLIC COMPOUNDS</subject><subject>CHEMISTRY</subject><subject>METALLURGY</subject><subject>ORGANIC CHEMISTRY</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2013</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZNAIKEotSCxKLMnMz1PITS3JyE9RSMsvAjMrcxQyi_OTKxPzEktSeRhY0xJzilN5oTQ3g6Kba4izh25qQX58anFBYnJqXmpJvLOfoYGRpbkZEDkaE6MGAPZDKL0</recordid><startdate>20130320</startdate><enddate>20130320</enddate><creator>XIONG QIANZHENG</creator><creator>XIAO XUHUI</creator><creator>ZANG YANGLING</creator><creator>WANG XIAOGUANG</creator><creator>LIAO LANGUI</creator><scope>EVB</scope></search><sort><creationdate>20130320</creationdate><title>Preparation method for methyl isocyanate</title><author>XIONG QIANZHENG ; XIAO XUHUI ; ZANG YANGLING ; WANG XIAOGUANG ; LIAO LANGUI</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_CN102976976A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>chi ; eng</language><creationdate>2013</creationdate><topic>ACYCLIC OR CARBOCYCLIC COMPOUNDS</topic><topic>CHEMISTRY</topic><topic>METALLURGY</topic><topic>ORGANIC CHEMISTRY</topic><toplevel>online_resources</toplevel><creatorcontrib>XIONG QIANZHENG</creatorcontrib><creatorcontrib>XIAO XUHUI</creatorcontrib><creatorcontrib>ZANG YANGLING</creatorcontrib><creatorcontrib>WANG XIAOGUANG</creatorcontrib><creatorcontrib>LIAO LANGUI</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>XIONG QIANZHENG</au><au>XIAO XUHUI</au><au>ZANG YANGLING</au><au>WANG XIAOGUANG</au><au>LIAO LANGUI</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Preparation method for methyl isocyanate</title><date>2013-03-20</date><risdate>2013</risdate><abstract>The invention discloses a preparation method for methyl isocyanate (iso-ester for short), comprising the following steps of: mixing methylaminoformyl chloride with a non-ozone-depleting substance (ODS) trichloromethane solvent to form a 15-25% methylaminoformyl/trichloromethane organic solution; continuously decomposing via a decomposer; performing product and solvent separation on the decomposition solution via a cyclone-type steam-liquid separator; and rectifying via a coarse esterification tower and a fine esterification tower to obtain methyl isocyanate having a purity of greater than 99%. 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subjects ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
title Preparation method for methyl isocyanate
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