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:
Mar. 10, 2020
Filed:
Mar. 23, 2016
Applicant:
Johnson Matthey Davy Technologies Limited, London, GB;
Inventors:
Assignee:
Johnson Matthey Davy Technologies Limited, London, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C 67/58 (2006.01); C07C 67/54 (2006.01); C07C 67/08 (2006.01); C07C 29/147 (2006.01);
U.S. Cl.
CPC ...
C07C 67/58 (2013.01); C07C 29/147 (2013.01); C07C 67/08 (2013.01); C07C 67/54 (2013.01);
Abstract
A process for recovering product dialkyl succinate, dialkyl maleate or dialkyl succinate and dialkyl maleate from an overhead stream from an esterification reaction column, said overhead stream comprising as a major component alkanol and water and as a minor component the product dialkyl succinate, dialkyl maleate or dialkyl succinate and dialkyl maleate which forms an azeotrope with the water, wherein said process comprises washing the overhead stream with butanol.