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:
Apr. 22, 2014
Filed:
Mar. 27, 2012
Scott Donald Barnicki, Kingsport, TN (US);
Robert Thomas Hembre, Johnson City, TN (US);
Stephen Neal Falling, Kingsport, TN (US);
Mesfin Ejerssa Janka, Kingsport, TN (US);
Kelley Margaret Moran, Kingsport, TN (US);
Scott Donald Barnicki, Kingsport, TN (US);
Robert Thomas Hembre, Johnson City, TN (US);
Stephen Neal Falling, Kingsport, TN (US);
Mesfin Ejerssa Janka, Kingsport, TN (US);
Kelley Margaret Moran, 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 methylene dipropionate in the presence of a solid acid catalyst and propionic acid. This invention discloses hydrocarboxylations and corresponding glycolic acid separations wherein the propionic acid stream is readily removed from the glycolic acid and the propionic acid is recycled.