Patent ID: 9587182
Date: 2017-03-07
CPC Classifications: B01D,C08G,C10G

Claim:
1. A method of demulsifying, dehydrating and desalting light, medium, heavy and extra-heavy crude oils having an API gravity of 8 to 30° API comprising the step of combining the crude oil and a formulation in an amount of 5 to 3000 ppm based on the amount of crude oil effective for demulsifying the crude oil and forming a mixture, said formulation comprising a mixture of (a) a poly(ethyleneoxide) poly(propyleneoxide) poly(ethyleneoxide) copolymer having a molecular weight of 400 to 4400 Daltons and a polydispersity of 1.02 to 1.5 and bifunctionalized with an amine, and a synergistic amount of (b) an ionic liquid having a cation selected from the group consisting of 1,5-dicarboxy-pentane-2-ammonium, pyridinium, isoquinolinium, imidazolium, ammonium and ammonium carboxymethane, and an anion selected from the group consisting of R mixing the resulting mixture for a time sufficient to demulsify, dehydrate and desalt the crude oil.