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. 24, 1981
Filed:
Jan. 14, 1980
Applicant:
Inventor:
Marvin M Crutchfield, Creve Coeur, MO (US);
Assignee:
Monsanto Company, St. Louis, MO (US);
Primary Examiner:
Int. Cl.
CPC ...
C11D / ;
U.S. Cl.
CPC ...
252 99 ; 252102 ; 2521 / ; 252 891 ; 8108 / ; 8109 ; 423385 ; 423388 ;
Abstract
The trialkali metal salts of nitrilotriacetate are well known detergent builders. However, when hypochlorite bleach is added to the wash water it can oxidize the soluble uncomplexed nitrilotriacetate with the resultant loss of the beneficial effects of the use of such salts as a builder. Now, a method has been developed of protecting the desirable builder properties of the trialkali metal nitrilotriacetate in an aqueous solution containing active chlorine which comprises adding to the nitrilotriacetate a sufficient amount of trialkali metal imidodisulfate to protect at least some of the nitrilotriacetate from damage by the chlorine.