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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.:

US 10689319 B1

PDFFull Text
Expired
Date of Patent:
Jun. 23, 2020

Filed:

Oct. 19, 2018

Processes for purifying acetic acid and hydrating anhydride

Applicant:

Celanese International Corporation, Irving, TX (US);

Inventors:

Ronald D. Shaver, Houston, TX (US);

Yaw-Hwa Liu, Missouri City, TX (US);

Mark O. Scates, Houston, TX (US);

Assignee:

CELANESE INTERNATIONAL CORPORATION, Irving, TX (US);

Attorney:

Kilpatrick Townsend & Stockton LLP

Primary Examiner:

Deborah D Carr

Int. Cl.
CPC ...
C07C 51/44 (2006.01); C07C 51/087 (2006.01); C07C 51/56 (2006.01); C07C 51/47 (2006.01); C07C 51/487 (2006.01); C07C 51/12 (2006.01);
U.S. Cl.
CPC ...
C07C 51/44 (2013.01); C07C 51/087 (2013.01); C07C 51/12 (2013.01); C07C 51/47 (2013.01); C07C 51/487 (2013.01); C07C 51/56 (2013.01);
Abstract

Processes for purifying acetic acid by distilling a process stream in a column in which acetic anhydride is formed in the lower portion of the column. The product stream withdrawn from the column comprises acetic acid, water at a concentration of no more than 0.2 wt. %, and acetic anhydride at a concentration of no more than 600 wppm. The process further comprises hydrating the acetic anhydride in the product stream to form a purified acetic acid product comprising acetic anhydride at a concentration of no more than 50 wppm.

Find Patent Forward Citations

Shaver, Ronald. (2020). Processes for purifying acetic acid and hydrating anhydride (U.S. Patent No. 10689319). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/10689319

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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