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1.
公开(公告)号:US5808148A
公开(公告)日:1998-09-15
申请号:US775935
申请日:1997-01-03
IPC分类号: B01J23/20 , C07B61/00 , C07C51/353 , C07C57/04 , C07C57/045 , C07C67/343 , C07C69/54 , C07C51/00
CPC分类号: C07C51/353 , C07C67/343
摘要: Disclosed is a process for the preparation of .alpha.,.beta.-unsaturated carboxylic acids and esters thereof which comprises contacting formaldehyde or a source of formaldehyde with a carboxylic acid, ester or anhydride in the presence of a catalyst comprising an oxide of niobium.
摘要翻译: 公开了一种制备α,β-不饱和羧酸及其酯的方法,其包括在包含铌氧化物的催化剂存在下使甲醛或甲醛源与羧酸,酯或酸酐接触。