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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 10781272 B1

PDFFull Text
Date of Patent:
Sep. 22, 2020

Filed:

Dec. 19, 2018

Process for recovery of residual hydrogenation catalyst from hydrogenated nitrile rubber solution

Applicant:

Zeon Chemicals, Lp, Louisville, KY (US);

Inventors:

Soobum Choi, Louisville, KY (US);

Lawrence J. Justice, Louisville, KY (US);

Mahesh Datla, Friendswood, TX (US);

Mike Recchio, Louisville, KY (US);

Assignee:

Zeon Chemicals, LP, Louisville, KY (US);

Attorney:

Frost Brown Todd LLC

Primary Examiner:

Melissa S Swain

Int. Cl.
CPC ...
C08F 6/06 (2006.01); C08C 2/04 (2006.01); C08L 15/00 (2006.01); B01J 38/52 (2006.01); C08F 6/02 (2006.01); C08F 6/22 (2006.01); C08F 8/04 (2006.01); C08F 20/44 (2006.01); B01J 38/74 (2006.01);
U.S. Cl.
CPC ...
C08F 6/06 (2013.01); B01J 38/52 (2013.01); C08C 2/04 (2013.01); C08F 6/02 (2013.01); C08F 6/22 (2013.01); C08F 8/04 (2013.01); C08F 20/44 (2013.01); C08L 15/005 (2013.01); B01D 2251/90 (2013.01); B01J 38/74 (2013.01);
Abstract

Residual hydrogenation catalyst produced from reduction of nitrile rubber is recovered by a chelation step using a chelating agent and a series of extraction using semi-coagulation with polar solvents and an optional washing steps for the separation of catalyst-chelating agent complex from hydrogenated nitrile rubber solution. The chelating agent is selected from xanthate, dithiocarbamate, and trithiocarbonate compounds.

Find Patent Forward Citations

Choi, Soobum. (2020). Process for recovery of residual hydrogenation catalyst from hydrogenated nitrile rubber solution (U.S. Patent No. 10781272). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/10781272

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

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