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:
Dec. 30, 1997
Filed:
Jul. 01, 1996
Applicant:
Inventors:
Michael K Stern, University City, MO (US);
Brian K Cheng, Chesterfield, MO (US);
Jerry R Ebner, St. Peters, MO (US);
Dennis P Riley, Ballwin, MO (US);
Assignee:
Monsanto Company, St. Louis, MO (US);
Primary Examiner:
Int. Cl.
CPC ...
C07F / ;
U.S. Cl.
CPC ...
562 16 ; 562 17 ;
Abstract
A process for preparing N-hydroxyalkylaminomethyl-phosphonic acid or salts thereof which comprises contacting an alkanolamine, formaldehyde and a trialkyl phosphite under suitable reaction conditions to produce a reaction mixture, and hydrolyzing the reaction mixture under neutral, acidic or basic conditions. In one embodiment, the N-hydroxyalkylaminomethylphosphonic acid or salts thereof is catalytically oxidized to produce an N-phosphonomethylaminocarboxylic acid or salts thereof.