Patent ID: 7786179

Claim:
A demulsifying composition comprising: (a) an anionic surfactant selected from the group consisting of alkylsulfosuccinates, alkyl phosphate esters, alkylphosphonic acids, salts thereof, and combinations thereof; (b) a nonionic surfactant selected from the group consisting of ethylene oxide/propylene oxide copolymers, ethoxylated fatty acid esters of polyethylene glycol, terpene alkoxylates, alcohol ethoxylates, modified alkanomides, and combinations thereof; and (c) a solvent base composition comprising a blend of dibasic esters selected from the group consisting of a blend of diesters of the formulas and a blend of diesters of the formulas wherein R is methyl, ethyl, propyl, isopropyl, butyl, isobutyl, n-butyl or isoamyl.