Patent ID: 8956529
Filing Date: 2015-02-17
Classification: B01D,C10G

Abstract:
1. A method for separating oil and water phases of an oil-water dispersion or emulsion derived from petroleum industry operations, comprising providing to the oil-water emulsion 1 to 10,000 ppm of an anionic polymer consisting of: A) 15-80% by weight of at least one C B) 15-80% by weight of at least one nonionic, copolymerizable α,β-ethylenically unsaturated monomer of the formula: C) 1-50% by weight of one or more of the following monomers: D) 0-5% by weight of at least one crosslinker, wherein all weight percents total 100 percent and are based on the total weight of the anionic polymer.