Patent ID: 6638983
Filing Date: 2003-10-28
Classification: B01D,C08G,C10G

Abstract:
A method of demulsifying water-in-oil emulsions wherein an effective amount of a demulsifying agent is introduced into the emulsion to separate the emulsion into a water phase and an oil phase, said agent being the reaction product of:(a) diisocyanate; and (b) a compound selected from the group consisting of (i) a polyalkylene glycol having a molecular weight ranging from about 11,716 to about 60,000 and wherein the alkylene group consists of from 3 to 4 carbon atoms and; (ii) an adduct of ethylene oxide and a polyalkylene glycol having a molecular weight ranging from about 11,716 to about 60,000 and wherein the alkylene group consists of from 3 to 4 atoms.