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:
May. 28, 1991
Filed:
Mar. 14, 1990
Applicant:
Inventors:
Assignee:
Takeda Chemical Industries, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01G / ;
U.S. Cl.
CPC ...
75744 ; 423 29 ;
Abstract
There is disclosed an activated carbon for use in the process of recovery of gold which comprises adsorbing aurocyanide complexes thereon, desorbing the complexews therefrom and separating the activated carbon with a screen, the activated carbon being spherical and having a diameter of more than the opening of the screen but of not more than 2 mm; an iodine number of not less than 950 mg/g as determined by JIS K 1474-1975; and a hardness of not less than 99% as determined by JIS K 1474-1975. Also disclosed is an improved, high efficient process of the recovery of gold which uses such a spherical activated carbon.