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:
Jun. 04, 2002
Filed:
Mar. 20, 2000
Applicant:
Inventors:
David J. Weinkauff, Manchester, MO (US);
Frank E. Paulik, St. Louis, MO (US);
Assignee:
Solutia Inc., St. Louis, MO (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 9/30 ;
U.S. Cl.
CPC ...
C07C 9/30 ;
Abstract
An improved hydrolysis process comprising a process for the preparation of 2-carboxyalkyl(aryl)phosphinic acid using a controlled addition of water to an acrylation reaction mixture, and control of the temperature. Preparation of 2-carboxyalkyl(aryl)phosphinic acid cyclic anhydride is disclosed using a controlled addition of water, wherein up to about one mole of water per mole of dichloro(aryl)-phosphine charged to the acrylation reaction is added, and temperature is controlled.