发明申请
- 专利标题： HYDROCARBOXYLATION OF METHYLENE DIPROPIONATE IN THE PRESENCE OF A PROPIONIC ACID AND A HOMOGENEOUS CATALYST
- 专利标题（中）： 丙酸与均相催化剂存在下亚甲基二苯甲酸的烷基化反应
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申请号： US13431402申请日： 2012-03-27
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公开(公告)号： US20130261329A1公开(公告)日： 2013-10-03
- 发明人: Scott Donald Barnicki , Robert Thomas Hembre , Stephen Neal Falling
- 申请人： Scott Donald Barnicki , Robert Thomas Hembre , Stephen Neal Falling
- 申请人地址： US TN Kingsport
- 专利权人： EASTMAN CHEMICAL COMPANY
- 当前专利权人： EASTMAN CHEMICAL COMPANY
- 当前专利权人地址： US TN Kingsport
- 主分类号： C07C67/36
- IPC分类号： C07C67/36 ; C07C29/149 ; C07C51/12
摘要：
Disclosed is a process for the production and purification of glycolic acid or glycolic acid derivatives by the carbonylation of methylene dipropionate in the presence of a homogeneous acid catalyst and propionic acid. This invention discloses hydrocarboxylations and corresponding homogeneous acid catalyst and glycolic acid separations. The homogeneous acid catalyst is readily separated from the hydrocarboxylation reaction effluent and recycled and the propionic acid is readily removed from the glycolic acid and the propionic acid is recycled
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