The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 26, 2015
Filed:
Jun. 08, 2012
Mesfin Ejerssa Janka, Kingsport, TN (US);
Scott Donald Barnicki, Kingsport, TN (US);
Robert Thomas Hembre, Johnson City, TN (US);
Kelley Margaret Moran, Kingsport, TN (US);
Stephen Neal Falling, Kingsport, TN (US);
Mesfin Ejerssa Janka, Kingsport, TN (US);
Scott Donald Barnicki, Kingsport, TN (US);
Robert Thomas Hembre, Johnson City, TN (US);
Kelley Margaret Moran, Kingsport, TN (US);
Stephen Neal Falling, Kingsport, TN (US);
Eastman Chemical Company, Kingsport, TN (US);
Abstract
Disclosed is a process for the production and purification of glycolic acid or glycolic acid derivatives by the carbonylation of aqueous formaldehyde. The water in the hydrocarboxylation zone is reduced via reaction with the ester bonds in a recycle stream comprising glycolic acid oligomers and/or methyl glycolate oligomers.