SAMUEL E SHULL
Engineers in Bethlehem, PA
License number
Pennsylvania PE015124E
Category
Engineers
Type
Professional Engineer
Address
Address
Bethlehem, PA 18017
Professional information
Process For Manufacturing 1-Hydroxyalkylidene-1,1-Diphosphonic Acid (Hadp)
US Patent:
6143923, Nov 7, 2000
Filed:
Oct 2, 1996
Appl. No.:
8/725144
Inventors:
Shilan Shen - High Bridge NJ
Samuel Ellsworth Shull - Bethlehem PA
Scott Brian Harvey - Bethlehem PA
Samuel Ellsworth Shull - Bethlehem PA
Scott Brian Harvey - Bethlehem PA
Assignee:
Lonza Inc. - Fair Lawn NJ
International Classification:
C07F 922
US Classification:
562 22
Abstract:
A process for manufacturing 1-hydroxyalkylidene-1,1-diphosphonic Acid (HADP) by introducing phosphorus trihalide (PX. sub. 3) into a reactor containing aqueous acid of the formula RCOOH at a temperature of 60-200. degree. C. and a pressure of 15-150 psig. Water is added to hydrolyze the intermediate formed to obtain HADP.