Invention Grant
- Patent Title: Hydrocarboxylation of formaldehyde in the presence of a higher order carboxylic acid and a homogeneous catalyst
- Patent Title (中): 在较高级羧酸和均相催化剂存在下甲醛的氢化羧化
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Application No.: US13431369Application Date: 2012-03-27
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Publication No.: US08765999B2Publication Date: 2014-07-01
- Inventor: Scott Donald Barnicki , Robert Thomas Hembre , Stephen Neal Falling , Andrew James Vetter
- Applicant: Scott Donald Barnicki , Robert Thomas Hembre , Stephen Neal Falling , Andrew James Vetter
- Applicant Address: US TN Kingsport
- Assignee: Eastman Chemical Company
- Current Assignee: Eastman Chemical Company
- Current Assignee Address: US TN Kingsport
- Agent Jennifer R. Knight
- Main IPC: C07C51/10
- IPC: C07C51/10
Abstract:
Disclosed is a process for the production and purification of glycolic acid or glycolic acid derivatives by the carbonylation of formaldehyde in the presence of a homogeneous acid catalyst and a carboxylic 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 carboxylic acid is readily removed from the glycolic acid and the carboxylic acid is recycled.
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