Patent ID: 9663726
Date: 2017-05-30
CPC Classifications: B01D,C08F,C10G

Claim:
1. A method of separating at least a portion of foulants from a water-in-oil emulsion comprising: adding an effective of amount of a demulsifier to a water-in-oil emulsion having at least one foulant therein to separate at least a portion of the at least one foulant from the water-in-oil emulsion; and separating at least a portion of the foulants from the water-in-oil emulsion; wherein the demulsifier is represented by the following structure: Y are independently a polyethylene oxide moiety, a polypropylene oxide moiety, a polybutylene oxide moiety, a moiety that is mixed block or random ethylene oxide (EO) moiety, propylene oxide (PO), and/or butylene oxide (BO) moiety, where one or both of the two phenolic polymer resin chains have an oxide moiety; X is a heteroatom selected from the group consisting of oxygen, sulfur, and combinations thereof; R is a C4-C30 alkyl chain; a+b+c>1; and EOs+POs+BOs>1.