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公开(公告)号:US3809724A
公开(公告)日:1974-05-07
申请号:US17858771
申请日:1971-09-08
发明人: GOLDEN R
CPC分类号: C07C29/82 , C07C67/54 , Y02P20/52 , Y10S203/06 , C07C69/16 , C07C31/202 , C07C31/205
摘要: ETHYLENE GLYCOL OR 1,2-PROPYLENE GLYCOL CONTAINED IN MIXTURES WITH LOWER CARBOXYLATE ESTERS OF THE GLYCOL IS RECOVERED BY AZEOTROPIC DISTILLATION OF THE MIXTURES WITH AH AZEOTROPING AGENT FORMING A MINIMUM BOILING AZEOTROPE WITH THE ETHYLENE GLYCOL OR 1,2-PROPYLENE GLYCOL.
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公开(公告)号:US3725207A
公开(公告)日:1973-04-03
申请号:US3725207D
申请日:1970-05-27
发明人: GOLDEN R
IPC分类号: B01D3/34 , C07C20060101 , C07C121/06
CPC分类号: C07C17/386
摘要: Alkylene nitriles having the formula X-CH2-CHR-CN may be purified by distillation by maintaining a concentration of 1 to 5 mol percent of CH2 CRCN in the distillation zone during the distillation. R may be hydrogen or a lower alkyl and X a chloro-, iodo- or bromo-group.
摘要翻译: 具有式X-CH 2 -CHR-CN的亚烷基腈可以在蒸馏期间通过蒸馏在蒸馏区中保持1至5mol%的CH 2 = CRCN的浓度进行蒸馏来纯化。 R可以是氢或低级烷基,X是氯,碘或溴基。
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