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:
Dec. 12, 2006
Filed:
Feb. 21, 2006
Juzer Jangbarwala, Chino Hill, CA (US);
Juzer Jangbarwala, Chino Hill, CA (US);
The BOC Group, Inc., Murray Hill, NJ (US);
Abstract
The present invention provides a method for selectively removing metal ions of interest from a solution (), such as the wastewater from a chemical mechanical polishing process. The method comprises contacting a solution () containing solid particles, an oxidizing agent and a first concentration of the metal ions with an ion-exchange resin (), such as a crosslinked poly-4-vinylpyridine resin, that is resistant to damage by the oxidizing agent and that is operative when in contact with the solution () to exchange selected ones of the metal ions in the solution for selected preferred ions in the ion-exchange resin thereby to produce a treated solution () having a second concentration of the metal ions that is lower than the first concentration. The present invention also relates to an apparatus () and system () for use with the method of the present invention.