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:
Oct. 02, 2018
Filed:
May. 24, 2013
Invista North America S.a R.l., Wilmington, DE (US);
Sudhir Aki, Katy, TX (US);
Thomas E. Vos, Beaumont, TX (US);
INVISTA NORTH AMERICA S.A R.L., Wilmington, DE (US);
Abstract
A process of hydrolyzing a monodentate, bidentate or tridentate phosphorus-based phosphite ester ligand or ligand blend for a transition metal catalyst comprising contacting the ligand or ligand blend with a hydrolysis catalyst of the formula (RX)P(OH)where n is 0, 1 or 2 wherein the ligand or ligand blend comprises one or more of (i) a bidentate biphosphite ligand of formula (III), (R—X)(R—X)P—X—Y—X—P(X—R)(X—R), (ii) a tridentate triphosphite ligand of formula (IIIA) (R—X)(R—X)P—X—Y—X—P(X—R)—(X—Y—K—P(X—R)—(X—R) or (iii) a monodentate phosphite ligand of formula (IV) P(X—R)(X—R)(X—R) where each X is oxygen or a bond and each Y is an optionally substituted C6-C20 arylene, followed by separation of the ligand hydrolysis products.