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:
Aug. 09, 2005
Filed:
Jan. 16, 2003
Stephen David Fidoe, Aberdeen, GB;
Robert Eric Talbot, Staffordshire, GB;
Christopher Raymond Jones, West Midlands, GB;
Robert Gabriel, Mechanicsville, VA (US);
Stephen David Fidoe, Aberdeen, GB;
Robert Eric Talbot, Staffordshire, GB;
Christopher Raymond Jones, West Midlands, GB;
Robert Gabriel, Mechanicsville, VA (US);
Rhodia Consumer Specialties Limited, Watford, GB;
Abstract
Treating a water system containing or in contact with a metal sulphide scale to inhibit, prevent, reduce, dissolve or disperse iron sulphide deposits. A solution of tris(hydroxyorgano)phosphines (THP) and tetrakis(hydroxyorgano)phosphonium salts (THPsalts) and sufficient of a chelant (amino-carboxylates or amino-phosphonates) to provide a solution containing from 0.1 to 50% by weight of said THP or THPsalt and from 0.1 to 50% by weight of said chelant, is contacted with the metal sulphide scale thereby to dissolve at least part of said scale in said solution.