SOLVENT REFINING METHOD FOR ISOCYANATE PREPARED BY PHOSGENE METHOD AND DEVICES USED IN SAME

A solvent refining method for isocyanate prepared by the phosgene method and multistage absorbing towers used in same. Solvent to be refined which contains water, iron, and/or phosgene, hydrogen chloride and other materials with color is dealt by the present method and multistage absorbing towers, w...

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Hauptverfasser:	Wang Yang, Shi Qile, Zhao Dongke, Shi Dekai, Zhang Hongke, Yao Yu, Hua Weiqi, Xu Dan, Chen Bin, Chen Qinglong
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS CHEMISTRY METALLURGY ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION TRANSPORTING
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creator	Wang Yang Shi Qile Zhao Dongke Shi Dekai Zhang Hongke Yao Yu Hua Weiqi Xu Dan Chen Bin Chen Qinglong
description	A solvent refining method for isocyanate prepared by the phosgene method and multistage absorbing towers used in same. Solvent to be refined which contains water, iron, and/or phosgene, hydrogen chloride and other materials with color is dealt by the present method and multistage absorbing towers, which can effectively prevent a drying agent from absorbing water and hardening, partial overheating in the tower and generating channeling. Meanwhile, the pressure drop is effectively lowered. In addition, the content of water is ≦50 ppm, the content of iron is ≦5 ppm, the content of phosgene and hydrogen chloride is ≦20 ppm, Pt-Co chroma is ≦20 in the refined solvent. Therefore, the refined solvent can be used as the solvent for preparing isocyanate in the phosgene method and remarkably improve an L color of isocyanate.
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Solvent to be refined which contains water, iron, and/or phosgene, hydrogen chloride and other materials with color is dealt by the present method and multistage absorbing towers, which can effectively prevent a drying agent from absorbing water and hardening, partial overheating in the tower and generating channeling. Meanwhile, the pressure drop is effectively lowered. In addition, the content of water is ≦50 ppm, the content of iron is ≦5 ppm, the content of phosgene and hydrogen chloride is ≦20 ppm, Pt-Co chroma is ≦20 in the refined solvent. Therefore, the refined solvent can be used as the solvent for preparing isocyanate in the phosgene method and remarkably improve an L color of isocyanate.</description><language>eng</language><subject>ACYCLIC OR CARBOCYCLIC COMPOUNDS ; CHEMISTRY ; METALLURGY ; ORGANIC CHEMISTRY ; PERFORMING OPERATIONS ; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL ; SEPARATION ; TRANSPORTING</subject><creationdate>2017</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20170126&DB=EPODOC&CC=US&NR=2017022152A1$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76547</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20170126&DB=EPODOC&CC=US&NR=2017022152A1$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>Wang Yang</creatorcontrib><creatorcontrib>Shi Qile</creatorcontrib><creatorcontrib>Zhao Dongke</creatorcontrib><creatorcontrib>Shi Dekai</creatorcontrib><creatorcontrib>Zhang Hongke</creatorcontrib><creatorcontrib>Yao Yu</creatorcontrib><creatorcontrib>Hua Weiqi</creatorcontrib><creatorcontrib>Xu Dan</creatorcontrib><creatorcontrib>Chen Bin</creatorcontrib><creatorcontrib>Chen Qinglong</creatorcontrib><title>SOLVENT REFINING METHOD FOR ISOCYANATE PREPARED BY PHOSGENE METHOD AND DEVICES USED IN SAME</title><description>A solvent refining method for isocyanate prepared by the phosgene method and multistage absorbing towers used in same. Solvent to be refined which contains water, iron, and/or phosgene, hydrogen chloride and other materials with color is dealt by the present method and multistage absorbing towers, which can effectively prevent a drying agent from absorbing water and hardening, partial overheating in the tower and generating channeling. Meanwhile, the pressure drop is effectively lowered. In addition, the content of water is ≦50 ppm, the content of iron is ≦5 ppm, the content of phosgene and hydrogen chloride is ≦20 ppm, Pt-Co chroma is ≦20 in the refined solvent. Therefore, the refined solvent can be used as the solvent for preparing isocyanate in the phosgene method and remarkably improve an L color of isocyanate.</description><subject>ACYCLIC OR CARBOCYCLIC COMPOUNDS</subject><subject>CHEMISTRY</subject><subject>METALLURGY</subject><subject>ORGANIC CHEMISTRY</subject><subject>PERFORMING OPERATIONS</subject><subject>PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL</subject><subject>SEPARATION</subject><subject>TRANSPORTING</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2017</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNqNyrEKwjAQANAsDqL-w4Gz0ETEOTbXJmAvIZcWikMpEifRQv1_dNDd6S1vKS7szx1SgoiVI0c1NJisN1D5CI592WvSCSFEDDqigVMPwXqukfBXNRkw2LkSGVr-HEfAusG1WNzG-5w3X1diW2Eq7S5PzyHP03jNj_waWlaFPBZKyYPScv_fegM3sjKj</recordid><startdate>20170126</startdate><enddate>20170126</enddate><creator>Wang Yang</creator><creator>Shi Qile</creator><creator>Zhao Dongke</creator><creator>Shi Dekai</creator><creator>Zhang Hongke</creator><creator>Yao Yu</creator><creator>Hua Weiqi</creator><creator>Xu Dan</creator><creator>Chen Bin</creator><creator>Chen Qinglong</creator><scope>EVB</scope></search><sort><creationdate>20170126</creationdate><title>SOLVENT REFINING METHOD FOR ISOCYANATE PREPARED BY PHOSGENE METHOD AND DEVICES USED IN SAME</title><author>Wang Yang ; Shi Qile ; Zhao Dongke ; Shi Dekai ; Zhang Hongke ; Yao Yu ; Hua Weiqi ; Xu Dan ; Chen Bin ; Chen Qinglong</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_US2017022152A13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2017</creationdate><topic>ACYCLIC OR CARBOCYCLIC COMPOUNDS</topic><topic>CHEMISTRY</topic><topic>METALLURGY</topic><topic>ORGANIC CHEMISTRY</topic><topic>PERFORMING OPERATIONS</topic><topic>PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL</topic><topic>SEPARATION</topic><topic>TRANSPORTING</topic><toplevel>online_resources</toplevel><creatorcontrib>Wang Yang</creatorcontrib><creatorcontrib>Shi Qile</creatorcontrib><creatorcontrib>Zhao Dongke</creatorcontrib><creatorcontrib>Shi Dekai</creatorcontrib><creatorcontrib>Zhang Hongke</creatorcontrib><creatorcontrib>Yao Yu</creatorcontrib><creatorcontrib>Hua Weiqi</creatorcontrib><creatorcontrib>Xu Dan</creatorcontrib><creatorcontrib>Chen Bin</creatorcontrib><creatorcontrib>Chen Qinglong</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Wang Yang</au><au>Shi Qile</au><au>Zhao Dongke</au><au>Shi Dekai</au><au>Zhang Hongke</au><au>Yao Yu</au><au>Hua Weiqi</au><au>Xu Dan</au><au>Chen Bin</au><au>Chen Qinglong</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>SOLVENT REFINING METHOD FOR ISOCYANATE PREPARED BY PHOSGENE METHOD AND DEVICES USED IN SAME</title><date>2017-01-26</date><risdate>2017</risdate><abstract>A solvent refining method for isocyanate prepared by the phosgene method and multistage absorbing towers used in same. Solvent to be refined which contains water, iron, and/or phosgene, hydrogen chloride and other materials with color is dealt by the present method and multistage absorbing towers, which can effectively prevent a drying agent from absorbing water and hardening, partial overheating in the tower and generating channeling. Meanwhile, the pressure drop is effectively lowered. In addition, the content of water is ≦50 ppm, the content of iron is ≦5 ppm, the content of phosgene and hydrogen chloride is ≦20 ppm, Pt-Co chroma is ≦20 in the refined solvent. Therefore, the refined solvent can be used as the solvent for preparing isocyanate in the phosgene method and remarkably improve an L color of isocyanate.</abstract><oa>free_for_read</oa></addata></record>
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subjects	ACYCLIC OR CARBOCYCLIC COMPOUNDS CHEMISTRY METALLURGY ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION TRANSPORTING
title	SOLVENT REFINING METHOD FOR ISOCYANATE PREPARED BY PHOSGENE METHOD AND DEVICES USED IN SAME
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