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:
Jan. 04, 2022
Filed:
Dec. 15, 2017
Applicant:
Eastman Chemical Company, Kingsport, TN (US);
Inventors:
Craig Alan Hoyme, Fall Branch, TN (US);
Robert Scott Huss, Kingsport, TN (US);
Joseph Jerome Puhr, Kingsport, TN (US);
Assignee:
Eastman Chemical Company, Kingsport, TN (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07C 51/44 (2006.01);
U.S. Cl.
CPC ...
C07C 51/44 (2013.01); C07C 51/44 (2013.01); C07C 57/04 (2013.01);
Abstract
The present disclosure relates to a process for producing high-purity acrylic acid using a dividing wall distillation column and in some instances using water as an entrainer and azeotroping agent. This disclosure provides a process for separating acrylic acid from recovered feed streams which comprise saturated organic acids including propionic acid. The resulting acrylic acid product is of sufficient purity to produce acrylate esters and high molecular weight acrylic acid polymers.