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:
Sep. 29, 1981
Filed:
Jul. 28, 1980
Donald A Johnson, Bolingbrook, IL (US);
Baker N Nimry, Downers Grove, IL (US);
Nalco Chemical Company, Oak Brook, IL (US);
Abstract
An improved method for the oxidation of water-soluble inorganic sulfide ions in aqueous systems is disclosed. The method uses a soluble metallic ion catalyst in the presence of an oxidizing agent. The improvement comprises adding to the system a water-soluble anionically-charged polymer having a molecular weight of from 1,000-100,000. Additionally, certain organic phosphonate materials can be used in combination with the polymer. By the use of the polymer or polymer-phosphonate treatment the efficiency of the metallic ion catalyst and the sulfide oxidation step is improved.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile