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. 06, 2026
Filed:
Sep. 22, 2023
Applicant:
Covestro Llc, Pittsburgh, PA (US);
Inventors:
Daniel R. Wagner, Pittsburgh, PA (US);
Brian L Neal, Pittsburgh, PA (US);
Assignee:
Covestro LLC, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J 47/02 (2017.01); B01D 3/10 (2006.01); B01J 39/12 (2006.01); B01J 41/10 (2006.01); B01J 47/026 (2017.01); C08G 18/48 (2006.01);
U.S. Cl.
CPC ...
B01J 47/026 (2013.01); B01D 3/10 (2013.01); B01J 39/12 (2013.01); B01J 41/10 (2013.01); C08G 18/48 (2013.01);
Abstract
Processes for purifying polyether polyols via treatment with ion exchange resins. A mixture that includes the polyether polyol and alkali metal ions is passed through a first bed that includes a cation exchange resin comprising carboxylic acid and/or phosphonic acid groups to remove alkali metal ions from the mixture. Thereafter, the product is passed through a second bed comprising an anion exchange resin comprising quaternary ammonium groups and a cation exchange resin comprising carboxylic acid and/or phosphonic acid groups to thereby produce a purified polyether polyol.