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1.
公开(公告)号:US5710328A
公开(公告)日:1998-01-20
申请号:US562860
申请日:1995-11-27
IPC分类号: B01J27/198 , C07C51/083 , C07C51/567 , C07C51/00
CPC分类号: B01J23/002 , B01J27/198 , C07C51/083 , C07C51/567 , B01J2523/00
摘要: Disclosed is a process for the preparation of .alpha.,.beta.-unsaturated carboxylic acids and anhydrides thereof which comprises contacting formaldehyde or a source of formaldehyde with a carboxylic anhydride in the presence of a catalyst comprising mixed oxides of vanadium, phosphorus and, optionally, a third component selected from titanium, aluminum or, preferably silicon.
摘要翻译: 公开了一种制备α,β-不饱和羧酸及其酸酐的方法,其包括使甲醛或甲醛源与羧酸酐在催化剂存在下接触,所述催化剂包含钒,磷和任选的第三 组分选自钛,铝或优选硅。
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2.
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。
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