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:
Jun. 23, 1987
Filed:
Dec. 09, 1985
Applicant:
Inventors:
Peter M Quan, Rochdale, GB;
Anthony J Nelson, Middleton, GB;
Assignee:
Imperial Chemical Industries PLC, London, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
4236585 ; 423 24 ; 423100 ; 423139 ; 423D / ; 7510 / ; 75117 ; 544224 ; 544225 ; 544251 ; 544263 ; 210681 ; 210685 ; 210688 ;
Abstract
Metal values, particularly copper values, are extracted from aqueous solutions containing halide or pseudohalide anion using 6,7 substituted triazolopyrimidine wherein the 6-substituent is a group --CO--OR1 where R1 is a hydrocarbyl group containing from 1 to 35 carbon atoms, preferably an alkyl group and wherein the 7-substituent (R2) is hydrogen or a hydrocarbyl group containing from 1 to 35 atoms wherein R1 and R2 taken together contain a total of from 5 to 35 saturated carbon atoms.