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:
Feb. 23, 2016
Filed:
Nov. 04, 2011
Wen LI Tu, Shanghai, CN;
Laura E. Rice, Saint Charles, IL (US);
Andrew J. Cooper, Oswego, IL (US);
Elisa M. Luth, Midlothian, IL (US);
Yu-mei LU, Taipei, TW;
Jian Kun Shen, Shanghai, CN;
Wen Li Tu, Shanghai, CN;
Laura E. Rice, Saint Charles, IL (US);
Andrew J. Cooper, Oswego, IL (US);
Elisa M. Luth, Midlothian, IL (US);
Yu-mei Lu, Taipei, TW;
Jian Kun Shen, Shanghai, CN;
NALCO COMPANY, Naperville, IL (US);
Abstract
The invention is directed to compositions and methods of their use as effective biocidal agents for water streams. The composition comprises a halogen source, halogen stabilizers containing a sulfur bearing species and ammonium salts/urea, and an alkali. The sulfur bearing species includes sulfamic acid or its salt equivalent. By having optimized mixing ratio of halogen to stabilizer and that of ammonium salts to sulfamic acid or sulfamate, a synergistic effect occurs which both increases the efficacy of the composition as a biocide and it avoids adverse impacts on other chemicals that are present in the water stream. Best of all the composition is easy to form and easy to introduce into a water stream of concern. Its introduction can be as simple as mixing two containers of reagent prior to introduction to the water process stream.