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. 18, 1990
Filed:
Dec. 08, 1988
Raymond F Dalton, Cheadle Hulme, GB;
John L Leng, St. Albans, GB;
Imperial Chemical Industries PLC, London, GB;
Abstract
A composition for use in extracting copper values from aqeous solutions of metal salts which comprises one more o-hydroxyaryloximes containing at least 5 aliphatic or alicyclic carbon atoms which are strong metal extractants which, in 0.2 molar solution in an aliphatic hydrocarbon solution loaded with 50% of the theoreticl uptake of copper, will be in equilibrium with 0.1 molar solution of copper as copper perchlorate at a pH less than 1; and one or more branched chain aliphatic or aromatic-aliphatic alcohols containing 14 to 30 carbon atoms or aliphatic or aliphatic-aromatic esters containing 10 to 30 carbon atoms, wherein the ratio of the number of methyl carbon atoms to the number of non-methyl carbon atoms is higher than 1:5, and which is selected from the group consisting of highly branched isohexadecyl alcohol, highly branched isooctadecyl alcohol and a diester of 2,2,4-trimethyl-1,3-pentanediol; and wherein the weight ratio of A to B is in the range 10:1 to 1:3.