发明授权
- 专利标题: Preparation of E,Z-butenedial bis(dialkyl acetals)
- 专利标题(中): 制备E,Z-丁二烯双(二烷基缩醛)
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申请号: US086028申请日: 1993-07-06
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公开(公告)号: US5338888A公开(公告)日: 1994-08-16
- 发明人: Joachim Paust , Wolfgang Krause
- 申请人: Joachim Paust , Wolfgang Krause
- 申请人地址: DEX Ludwigshafen
- 专利权人: BASF Aktiengesellschaft
- 当前专利权人: BASF Aktiengesellschaft
- 当前专利权人地址: DEX Ludwigshafen
- 优先权: DEX4223889 19920721
- 主分类号: B01J31/02
- IPC分类号: B01J31/02 ; C07B61/00 ; C07C41/50 ; C07C43/303 ; C07C41/01 ; C07C41/28
摘要:
An improved process for preparing E,Z-butenedial bis(dialkyl acetals) by reacting the corresponding 2,5-dialkoxy-2,5-dihydrofurans with the corresponding lower alkanols in the presence of an acid at elevated temperature entails carrying out the reaction in the presence of approximately equimolar amounts of a trialkyl orthoformate and in the presence of catalytic amounts of a strong mineral acid or of a strong organic acid.
公开/授权文献
- USD262823S Surgical tool 公开/授权日:1982-01-26
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