Nitro-substituted benzoxazoles having utility as metallurgical e

Details Nitro-substituted benzoxazoles having utility as metallurgical e Nitro-substituted benzoxazoles having utility as metallurgical e

1977-08-25

1978-10-31

Rush, Raymond V.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

423 24, 423DIG14, C07D26356

Patent

active

041234359

ABSTRACT:
Nitro-substituted 2-(2-hydroxyphenyl)benzoxazoles of the formula ##STR1## wherein one of R.sup.3 and R.sup.4 is --NO.sub.2 and the other is --H, --NO.sub.2 or alkyl of 1 to 20 carbons and R.sup.1 and R.sup.2 independently are --H or alkyl of 1 to 20 carbons, with the proviso that R.sup.1, R.sup.2, R.sup.3 and R.sup.4 contain a total of at least 7 carbons, are acidic, oil soluble compounds having utility for extraction of copper from strongly acidic ore leaches. Excellent selectivity for copper over iron is exhibited by the subject compounds.

REFERENCES:
patent: 3655347 (1972-04-01), Mattison et al.
patent: 4020081 (1977-04-01), Mackay et al.

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