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:
Jul. 10, 2001
Filed:
Nov. 19, 1999
Applicant:
Inventors:
Ricardo Arancibia Cifuentes, Santiago, CA (US);
Donald C. Roe, Jamison, PA (US);
Jorge Vergara Chavez, Chuquicamata, CL;
Andres Reghezza Inzunza, Chuquicamata, CL;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25C 1/12 ;
U.S. Cl.
CPC ...
C25C 1/12 ;
Abstract
A method for enhancing the operation of an acid solvent extraction and electrowinning operation by inhibiting acidic aerosol formation, allowing increased acid concentration and allowing higher operating temperature is disclosed wherein an antifoam formulation stable at a solution pH of about 1 to 2 is added. A preferred antifoam formulation comprises a glycol ester and an alkyl phenol ethoxylate in a paraffinic oil solvent added to the acid solution of an acid solvent extraction and electrowinning operation.