Imperial Chemical Industries Limited

Zeneca Limited

Nerco Inc.

Derek Thorp

Ronald W Kenyon

Peter M Quan

David F Newton

Peter A Tasker

Peter W Austin

Roy Bradbury

Raymond F Dalton

Ian Murray Atkinson

Leonard Francis Lindoy

Composition and method for selectively removing metal ions from an

A solvent soluble heterocyclic o-hydroxy thione carrying a lipophilic group and the process for the selective extraction of gallium, and certain other related metals, especially from solutions containing excess aluminium.

Heterocyclic thione

A composition of bibenzimidazoles of the Formula (I): ##STR1## wherein X & Y which may be the same or different and, taken together, contain a total of from 12 to 52 saturated carbon atoms, are (a) each selected from --R, --COR, --CH.sub.2 COOR, --CH(COOR).sub.2 and --COOR; or (b) together form a group selected from ##STR2## wherein R is an optionally substituted hydrocarbyl group,

Bis-bibenzimidazole composition

Compounds of the Formula VII: ##STR1## Wherein: X.sup.1 and X.sup.2 are each independently selected from --H, cyano, alkyl, alkoxy, aryl, carbamoyl, sulphamoyl, COOH and carboxylic acid ester;

Polycyclic dyes

A thermal transfer printing sheet comprising a substrate having a coating of a polycyclic dye, selected from dioxodibenzofuran, dioxofuranindole and dioxobenzodipyrrole. The polycyclic dye carries pendant phenyl groups which themselves carry a variety of open-chain, cyclic and heterocyclic substituent groups.

Thermal transfer printing

The present invention relates to a process for the preparation of certain polycyclic dyes and in particularly the preparation of a polycyclic dye of Formula I: ##STR1## By reacting a phenyltartronic acid of Formula II: ##STR2## With either a compound of Formula III: ##STR3## or a compound of Formula IV: ##STR4##

Compounds of the Formula VII: ##STR1## wherein; X.sup.1 and X.sup.2 are each independently selected from H, cyano, alkyl, alkoxy, aryl, carbamoyl, sulphamoyl, COOH and carboxylic acid ester;

Polycylic dyes

A process for extracting metal values such as gallium and/or indium from aqueous solutions by contacting said solutions with a water immiscible organic solvent having dissolved therein a heterocyclic thione.

A compound of the formula: ##STR1## wherein, Z.sup.1 and Z.sup.2 are each independently - O -, - S - or - NR.sup.5 - in which R.sup.5 is H or an optionally-substituted hydrocarbon group or an acyl group;

2.6-dioxo-2.6-dehydrobenzo[1:2-b,4:5-b]difurans

A novel hetero-polycyclic compound of the following formula, a method for its preparation and its use in the coloration of textile materials: ##STR1## wherein, Z.sup.1 & Z.sup.2 are each independently --O--, --S-- or --NR.sup.5 -- in which R.sup.5 is H or an optionally-substituted hydrocarbon group or an acyl group;

Growing community of inventors

Heywood, United Kingdom

Derek Thorp