发明授权
- 专利标题: Process for the synthesis of (math)acrylic anhydrides
- 专利标题(中): (数学)丙烯酸酐的合成方法
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申请号: US188585申请日: 1988-04-29
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公开(公告)号: US4857239A公开(公告)日: 1989-08-15
- 发明人: Patrice Hurtel , Denis Laurent , Joseph Rondini
- 申请人: Patrice Hurtel , Denis Laurent , Joseph Rondini
- 申请人地址: FRX Paris Defense
- 专利权人: Norsolor
- 当前专利权人: Norsolor
- 当前专利权人地址: FRX Paris Defense
- 优先权: FRX8519116 19851224
- 主分类号: C07C51/56
- IPC分类号: C07C51/56 ; C07C51/567 ; C07C57/04
摘要:
The present invention relates to a process for the synthesis of (meth)acrylic anhydride, according to which (meth)acrylic acid is reacted with acetic anhydride in the presence of at least one polymerization inhibitor, in a reactor surmounted by a distillation column. This process is characterized in that the mole ratio of (meth)acrylic acid to acetic anhydride is chosen to be between 2 and 5, in that the reaction is performed in the absence of catalyst, and in that:the acetic acid formed during the reaction is drawn off, andat least one polymerization inhibitor is gradually introduced into the top of the distillation column during the reaction and the distillation enabling the (meth)acrylic anhydride formed to be separated.The (meth)acrylic anhydrides thereby obtained are used, in particular, as reagents in the preparation of (meth)acrylates.
公开/授权文献
- US6079930A Apparatus for tennis ball retrieval 公开/授权日:2000-06-27