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:
Apr. 25, 1978
Filed:
Feb. 09, 1976
Applicant:
Inventors:
Hans E Kubitschek, Houston, TX (US);
Louis Kravetz, Houston, TX (US);
Assignee:
Shell Oil Company, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C11D / ;
U.S. Cl.
CPC ...
252102 ; 252 95 ; 252 99 ; 252186 ; 8111 ; 423272 ; 423273 ;
Abstract
A process for the activation of peroxide-based bleaches comprises conjointly incorporating into an aqueous medium a peroxide-based bleach, sufficient buffering agent to maintain the aqueous medium under alkaline conditions and certain metal cyanamides (e.g., calcium cyanamide, disodium cyanamide and sodium acid cyanamide), which have been found to be highly effective peroxide activators when employed under alkaline conditions. Stable concentrated liquid and solid metal cyanamide-activated bleaching compositions are also disclosed.