Bis(dialkylthiophosphoryl)amines as metal extractants

Details Bis(dialkylthiophosphoryl)amines as metal extractants Bis(dialkylthiophosphoryl)amines as metal extractants

1994-11-29

1996-03-26

Richter, Johann

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

C07F 936

Patent

active

055022502

ABSTRACT:
A process for extracting metal values especially zinc values from aqueous solutions of metal salts which comprises contacting the aqueous solution with an organic phase comprising a compound of the formula: ##STR1## wherein each of R.sup.1, R.sup.2, R.sup.3 and R.sup.4, independently, represents an optionally substituted hydrocarbyl or hydrocarbyloxy group or R.sup.1 and R.sup.2 together with the attached phosphorus atom and/or R.sup.3 and R.sup.4 together with the attached phosphorus atom form a 5- to 8-membered heterocyclic ring.

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