Patent ID: 9745521
Date: 2017-08-29
CPC Classifications: C08G,C08L,C10G

Claim:
1. A method of demulsifying, dewatering and desalting heavy crude oil comprising adding a composition to a crude oil having a specific gravity from 14° to 20°API for sufficient time to demulsify, dewater and desalt the crude oil, wherein said composition comprises a compound of formula (4) where R is and R represents a copolymer with molecular weights in the range from 1000 to 4000 Daltons, w and y are independently a number to provide the molecular weight, R Z is a radical independently selected from the group consisting of methanesulfonate, benzenesulfonate and para-toluenesulfonate, and where: w and y are independently a number to provide the molecular weight; R where A is a number between 1 and 9, B is H, E, G and J are independently a radical selected from the group consisting of: —H, methyl, ethyl, n-propyl, iso-propyl, sec-butyl, iso-butyl, tert-butyl, n-butyl, phenyl, cyclohexyl, cyclopentyl, L is a radical represented by methyl or ethyl and M is a hydroxyl group, Q is a number between 1 and 5, T is selected from the group consisting of —H, methyl, ethyl, n-propyl, iso-propyl, sec-butyl, iso-butyl, tert-butyl, n-butyl, phenyl, cyclohexyl, cyclopentyl, NO where: U is 1 or 2, X is represented by atoms of oxygen and nitrogen, when X is nitrogen then V is represented by, -methyl, ethyl, n-propyl, iso-propyl, sec-butyl, iso-butyl, tert-butyl, n-butyl phenyl, cyclohexyl, cyclopentyl, benzyl, Z is represented by methyl, ethyl, n-propyl, iso-propyl, sec-butyl, iso-butyl, tert-butyl, n-butyl, phenyl, cyclohexyl, cyclopentyl, benzyl or hydroxyl at any position of the 5 or 6 members' rings.