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, 1976
Filed:
Jan. 04, 1974
Wilfred Pickles, Stockport, EN;
Eric Keith Baylis, Stockport, EN;
Ciba-Geigy Corporation, Ardsley, NY (US);
Abstract
A compound having the general formula ##SPC1## In which R.sup.1 , R.sup.2, R.sup.3 and R.sup.4 may be the same or different and represent hydrogen, a straight or branched chain alkyl radical having 1 to 20 carbon atoms, an aralkyl radical having 7 to 20 carbon atoms which may be substituted by one or more alkyl groups having 1 to 4 carbon atoms, or may be of the type: ##SPC2## Wherein R.sup.5 and R.sup.6 are each a hydrogen atom or a methyl group, and each R represents the others of R.sup.1, R.sup.2, R.sup.3 and R.sup.4, an alkenyl radical having 2 to 20 carbon atoms; a cycloalkyl radical having 5 to 12 carbon atoms which may be substituted by one or more alkyl groups having 1 to 4 carbon atoms; an aryl radical having 6 to 10 carbon atoms; an alkaryl radical having 7 to 12 carbon atoms; a cyclohexyl alkyl radical in which the alkyl moiety has 2 or 3 carbon atoms and the cyclohexenyl ring may contain a methyl group as substituent; an alkenyl cyclohexyl radical in which the alkenyl moiety has 2 or 3 carbon atoms and the cyclohexyl ring may also contain a methyl group as substituent; or a group -OR.sup.7 wherein R.sup.7 represents an alkyl radical having 1 to 20 carbon atoms, a cycloalkyl radical having 5 to 12 carbon atoms, optionally substituted by one or more alkyl groups having 1 to 4 carbon atoms, an aryl radical having 6 to 10 carbon atoms or an alkenyl radical having 3 to 20 carbon atoms; or any two adjacent radicals R.sup.1, R.sup.2, R.sup.3 and R.sup.4 may be joined together to form an aryl ring which may be substituted by one or more alkyl groups having 1 to 20 carbon atoms; X represents an anion; and n is the valency of X, is useful for the extraction of metals from aqueous solutions.