Patent ID: 6120678
Filing Date: 2000-09-19
Classification: B01D,C10G

Abstract:
A method for enhanced resolution of crude oil hydrocarbon emulsions, with said crude oil hydrocarbon emulsions being oil-in-water emulsions, containing asphaltenes comprising the steps of:a) treating the emulsions with from about 1 to about 10,000 parts per million, based on the total amount of the emulsion treated, of an alkyl phenol-formaldehyde polymer having the structure: ##STR10## wherein R is a linear or branched alkyl group having from 4-24 carbon atoms; and x is an integer of sufficient number to obtain a weight average molecular weight ranging from about 1,000 to about 20,000; andb) putting the crude oil so treated through an electrostatic desalter, such that a rag interface that forms in the electrostatic desalter is reduced.