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:
Mar. 13, 2018
Filed:
Jun. 25, 2015
Applicant:
Invista North America S.a R.l., Wilmington, DE (US);
Inventor:
William J. Tenn, III, Beaumont, TX (US);
Assignee:
INVISTA NORTH AMERICA S.A R.L., Wilmington, DE (US);
Primary Examiner:
Int. Cl.
CPC ...
C07C 253/34 (2006.01); B01D 3/12 (2006.01); B01J 31/18 (2006.01); B01J 31/40 (2006.01); B01J 38/56 (2006.01); B01J 38/04 (2006.01); B01D 11/04 (2006.01); B01D 11/00 (2006.01);
U.S. Cl.
CPC ...
C07C 253/34 (2013.01); B01D 3/12 (2013.01); B01D 11/0461 (2013.01); B01D 11/0492 (2013.01); B01J 31/185 (2013.01); B01J 31/40 (2013.01); B01J 38/04 (2013.01); B01J 38/56 (2013.01); B01D 2011/002 (2013.01); B01J 2231/322 (2013.01); B01J 2531/002 (2013.01);
Abstract
Disclosed herein are methods for recovering phosphorus-containing ligand from mixtures comprising organic mononitriles and organic dinitriles, using liquid-liquid extraction. Also disclosed are treatments to enhance extractability of the phosphorus-containing ligand.