Method for preparing high-purity cyclopentadiene
The invention discloses a method for preparing high-purity cyclopentadiene (CPD) from crude dicyclopentadiene (DCPD). According to the method, crude dicyclopentadiene is taken as a raw material, a diluent is added in depolymerization, dicyclopentadiene and the diluent are mixed by a mass ratio of (1...
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| creator | HUA JIANYING LIU WEILIAN ZHOU FEI WU ZHUO HUANG CAIFENG HUANG YONG GUO SHIZHUO |
| description | The invention discloses a method for preparing high-purity cyclopentadiene (CPD) from crude dicyclopentadiene (DCPD). According to the method, crude dicyclopentadiene is taken as a raw material, a diluent is added in depolymerization, dicyclopentadiene and the diluent are mixed by a mass ratio of (1-4):1 and then put into a depolymerization kettle, under the conditions of normal pressure, depolymerization temperature of 160 DEG C-200 DEG C and reflux ratio of 0.5-5, the yield of cyclopentadiene is 90%, and finally, cyclopentadiene with purity more than 99% can be obtained. The method has obvious positive effects that polymerization of crude dicyclopentadiene can be effectively reduced, and the yield of dicyclopentadiene is improved; furthermore, the diluent can guarantee impurities such as isopropenyl norbornene not to be depolymerized so as to guarantee the purity of cyclopentadiene; the method is particularly suitable for preparing high-purity cyclopentadiene from raw material crude dicyclopentadiene obtain |
| format | Patent |
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According to the method, crude dicyclopentadiene is taken as a raw material, a diluent is added in depolymerization, dicyclopentadiene and the diluent are mixed by a mass ratio of (1-4):1 and then put into a depolymerization kettle, under the conditions of normal pressure, depolymerization temperature of 160 DEG C-200 DEG C and reflux ratio of 0.5-5, the yield of cyclopentadiene is 90%, and finally, cyclopentadiene with purity more than 99% can be obtained. The method has obvious positive effects that polymerization of crude dicyclopentadiene can be effectively reduced, and the yield of dicyclopentadiene is improved; furthermore, the diluent can guarantee impurities such as isopropenyl norbornene not to be depolymerized so as to guarantee the purity of cyclopentadiene; the method is particularly suitable for preparing high-purity cyclopentadiene from raw material crude dicyclopentadiene obtain</description><language>chi ; eng</language><subject>ACYCLIC OR CARBOCYCLIC COMPOUNDS ; CHEMISTRY ; METALLURGY ; ORGANIC CHEMISTRY</subject><creationdate>2014</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=20140326&DB=EPODOC&CC=CN&NR=103664466A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76289</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20140326&DB=EPODOC&CC=CN&NR=103664466A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>HUA JIANYING</creatorcontrib><creatorcontrib>LIU WEILIAN</creatorcontrib><creatorcontrib>ZHOU FEI</creatorcontrib><creatorcontrib>WU ZHUO</creatorcontrib><creatorcontrib>HUANG CAIFENG</creatorcontrib><creatorcontrib>HUANG YONG</creatorcontrib><creatorcontrib>GUO SHIZHUO</creatorcontrib><title>Method for preparing high-purity cyclopentadiene</title><description>The invention discloses a method for preparing high-purity cyclopentadiene (CPD) from crude dicyclopentadiene (DCPD). 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| title | Method for preparing high-purity cyclopentadiene |
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