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US 5,183,940 AGranted
Poly-(n-[2-hydroxybenzyl])-1,2-diaminoethanes
AssigneeImperial Chemical Industries PLC
InventorsPeter M. Quan, Stephen W. Leeming
Life of this patent
Estimating the term…
Abstract
Gallium is efficiently extracted from strongly basic solutions containing aluminates by extractants having the tris- and/or tetrakis (2-hydroxybenzyl)-1,2-diaminoethane chemical moiety. The diaminoethane derivative may be used together with a hydrocarbyl 8-hydroxyquinoline and/or with a tertiary carboxylic acid.
Claims9
A compound of the general formula (A):
- ##STR8## wherein:
- Q is a hydrogen atom or a group --CH.sub.2 Z;
- Z is a 2-hydroxyphenyl group R.sub.1 is a hydrocarbyl group R.sub.2, R.sub.3, and R.sub.7 to R.sub.11 are each, independently, a hydrogen atom;
- Y.sub.1 is a hydrogen atom, or an alkyl group containing up to 20 carbon atoms, or a phenyl group;
- Y.sub.2 is a hydrogen atom or an alkyl group containing up to 20 carbon atoms, or Y.sub.1 and Y.sub.2, together with the group ##STR9## form a saturated or unsaturated ring system;
- and R.sub.1, Y .sub.1 and Y.sub.2 are the same or different and together contain in total from 10 to 60 saturated carbon atoms.
3 more elements
A compound of the general formula (A):
- ##STR10## wherein:
- Q is a hydrogen atom, a hydrocarbyl group or a group --CH.sub.2 Z;
- Z is a --COOH group or a 2-hydroxyphenyl group which may optionally be substituted by the groups R.sub.12, R.sub.13 and R.sub.14 ;
- R.sub.1 to R.sub.9, and R.sub.12 to R.sub.14, which may be the same or different, are substituent groups selected from hydrogen, hydrocarbyl, alkoxy, halogen, hydrocarbyl sulphonyl, acyl, amino, nitro and cyano or, when R.sub.1 and R.sub.2 and/or R.sub.4 and R.sub.5 are adjacent substituents they may complete a benzo ring and R.sub.1 to R.sub.9 and R.sub.12 to R.sub.14 are such that the substituents on at least one of the rings are different form the substitutents on at least one other of the rings;
- R.sub.10 and R.sub.11 are each, independently, a hydrogen atom or an alkyl group containing up to 20 carbon atoms;
- Y.sub.1 is a hydrogen atom, or an alkyl group containing up to 20 carbon atoms, or a phenyl group;
- Y.sub.2 is a hydrogen atom or an alkyl group containing up to 20 carbon atoms, or Y.sub.1 and Y.sub.2, together with the group ##STR11## form a saturated or unsaturated ring system;
- and R.sub.1 to R.sub.14, Y.sub.1 to Y.sub.2 are the same or different and together contain in total from 10 to 60 saturated carbon atoms.
5 more elements
Dependencies are inferred from the claim text.