Method of producing a glycolic acid ester
Patent 5455372 Issued on October 3, 1995. Estimated Expiration Date: 
March 10, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
March 10, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesProcess for the preparation of ethylene glycol Process for the production of glycollic acid esters Process for producing ethylene glycol and/or glycolic acid ester, catalyst composition used therefor, and process for production thereof Patent #: 4585890 InventorsAssigneeApplicationNo. 209386 filed on 03/10/1994US Classes:560/179Oxy in acid moietyExaminersPrimary: Dees, Jose G.Assistant: Frazier, Barbara S. Attorney, Agent or FirmForeign Patent References
International ClassC07C 069/675Foreign Application Priority Data1993-03-12 JPAbstractA glycolic acid ester is produced by hydrogenating an oxalic acid diester of the formula, (COOR)2, wherein R is a C1-6 alkyl group, with hydrogen in the presence of a solid catalyst comprising, for example, copper and silver metals carried on a solid carrier, and in the additional presence of an aliphatic alcohol, and collecting the resultant glycolic acid ester from the reaction mixture by distillation, preferably in the presence of an ester of a C3-12 dicarboxylic acid.Field of SearchOxy in acid moiety |
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