5-(2-Hydroxyphenyl)tetrazolyl compounds
AssigneeImperial Chemical Industries PLC
InventorsBrian Anderson, Raymond Frederick Dalton, Philip Martin Rowbotham
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Abstract
5-(2-Hydroxyphenyl)tetrazoles having substituents containing at least 5 aliphatic or alicyclic carbon atoms are prepared from the corresponding o-hydroxybenzyl cyanides with alkali metal azides. These tetrazoles are useful as extracting agents in liquid-liquid extraction processes for metals, especially copper. When used in such processes in combination with o-hydroxyaryl oximes they improve the extraction kinetics of the oximes.
Claims6
A heterocyclic compound of the formula ##STR3## wherein X is a substituted o-hydroxyphenyl group of the formula ##STR4## wherein R is hydrogen, halogen, nitro or alkyl and R.sup.1 is hydrogen or alkyl, with the proviso that R and R.sup.1 together contain from 5 to 18 aliphatic carbon atoms.
Dependencies are inferred from the claim text.