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:
Jan. 13, 2009
Filed:
Feb. 01, 2005
Applicants:
Hugh W. Richardson, Sumter, SC (US);
Gang Zhao, Sumter, SC (US);
Inventors:
Hugh W. Richardson, Sumter, SC (US);
Gang Zhao, Sumter, SC (US);
Assignee:
Phibro-Tech, Inc., Ridgefield Park, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F 1/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Process for producing a copper-containing aqueous solution, in which a copper mass is dissolved in the presence of air in an aqueous leach liquor containing monoethanolamine and an acid, wherein the amount of acid equivalents is between 0.05 and about 0.7 times the equivalents of monoethanolamine, and wherein the rate of copper dissolution into the aqueous leach liquor is greater than about 4.3 grams of copper per liter of leach liquor per hour until a product having at least about 80 grams per liter is obtaine.