Imperial Chemical Industries Limited

Zeneca Limited

John L Leng

Raymond F Dalton

Brian R Fishwick

Denis Robert Ridyard

David F Newton

John R Lawson

Brian Parton

Michael Yelland

David Melville Fawkes

Thomas Douglas Baron

A composition for use in extracting metals from aqueous solutions of metals salts comprises at least one o-hydroxyaryloxime containing at least 5 aliphatic or alicyclic carbon atoms and at least one ester containing from 10 to 30 carbon atoms, the weight ratio of o-hydroxyaryloximes to the esters being in the range of 10:1 to 1:3. A process for extracting metal from aqueous solutions using the composition is also disclosed.

Composition and use of composition for the extraction of metal values

A composition for use in extracting copper values from aqueous solutions of metal salts comprises one or 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 when loaded with 50% of the theoretical uptake of copper, will be in equilibrium with a 0.1 molar solution of copper as copper perchlorate at a pH less than 1 and one or more branched chain 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 1:5 and the weight ratio of A to B being in the range of 10:1 to 1:3.

Composition and use of the composition for the extraction of metals from

A metal extractant for extracting metals from aqueous solutions of metal salts comprising at least one o-hydroxyaryloxime and one or more aliphatic or aromatic-alicyclic alcohols.

A composition for use in extracting copper values from aqueous solutions of metal salts which comprises:

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.

Azo dyestuffs devoid of carboxylic acid and sulphonic acid groups and of the formula I ##STR1## wherein A is the residue of 1,3 or 1,4-benzodioxan ring structure fused to the thiazole ring via the benzene ring, B is the residue of a para-coupling amine or an indole, R is an optionally substituted alkyl, alkenyl, cycloalkyl or aralkyl radical and X is an anion. The dyestuffs are useful for the colorization of synthetic polymeric materials particularly polyacrylonitrile and copolymers thereof.

Azo dyestuff including a 1,3 or 1,4-benzodioxan ring structure fused to

Dyestuffs of the formula ##STR1## WHEREIN (R).sub.n represents n substituents R each of which may be independently halogen, lower alkyl, lower alkoxy or COOH

Dyestuffs

Azo dyestuff free from carboxylic acid or sulphonic acid groups selected from the group consisting of

Monoazo hydroxy pyridone dyestuffs containing a methylene piperidino

A water-insoluble azo dyestuff of the formula:- ##SPC1## Wherein R is lower alkyl; the ring A is unsubstituted or is substituted by chlorine, bromine or nitro; Y is hydrogen, lower alkyl or lower alkoxy; Z is hydrogen, lower alkyl, lower alkoxy, chlorine or a group of the formula --NHCOR.sup.1 wherein R.sup.1 is lower alkyl; and X.sup.1 and X.sup.2 are independently selected from hydrogen, lower alkyl, hydroxy lower alkyl, lower alkylcarbonyl lower alkyl, cyano lower alkyl, lower alkoxycarbonyl lower alkyl, lower alkoxy lower alkyl, lower alkylcarbonyloxy lower alkyl, lower alkoxy lower alkoxycarbonyl lower alkyl, cyano lower alkoxy lower alkyl, chloro lower alkyl, phenoxy lower alkyl, phenyl, lower alkylcarbonylamino lower alkyl, cyano lower alkoxycarbonyl lower alkyl and lower alkylcarbonyloxy lower alkoxy carbonyl lower alkyl, a process for the manufacture of the said dyestuff and its use for colouring synthetic textile materials.

Growing community of inventors

St. Albans, United Kingdom

John L Leng