Patent ID: 6022991
Filing Date: 2000-02-08
Classification: C07F,Y02P

Abstract:
A process of regenerating oxidized dithiophosphorus acids comprising the steps of:a) providing an organic solution, said organic solution containing a disulfide formed by oxidation and sulfur--sulfur bonding of an extractant selected from the group consisting of dithiophosphoric acid, dithiophosphonic acid and dithiophosphinic acid,b) contacting said organic solution with a metal selected from the group consisting of cobalt, iron, manganese, nickel and zinc, andc) reacting said metal with said disulfide in said organic solution to break the sulfur--sulfur bond in the disulfide and form a metal complex with the dithiophosphorus acid, said metal complex forming with said organic solution free of nascent hydrogen and gaseous hydrogen.