公开(公告)号：US3637609A

公开(公告)日：1972-01-25

申请号：US3637609D

申请日：1970-06-01

Applicant: FMC CORP

Inventor： BLUMBERGS JOHN H ,  FINLEY JOSEPH H ,  RIZZO JOHN J

IPC: C08F8/00 ,  C11D3/00 ,  C11D3/37 ,  C08F27/04

CPC classification number: C11D3/3761 ,  C08F8/00 ,  C08F20/02

Abstract: THE SODIUM SALT OF POLY(MALEIC ACID), USEFUL AS A DETERGENT BUILDER, IS PREPARED BY HYDROLYZING POLY(MALEIC ANHYDRIDE) WITH WATER AT 60 TO 80*C., AND SIMULTANEOUSLY ADDING THE AQUEOUS SOLUTION AND A SOURCE OF SODIUM OXIDE INTO A HEEL OF WATER AT PH 9.2 TO 10.6, MAITAINING THIS PH THROUGHOUT THE ADDITION THEN BLEACHING THE SLURRY, AND RECOVERING THE SALT.