composition, and methods for making a surfactant, for enhanced oil recovery (eor) and for recovering an asphaltene-based crude oil

摘要

composition, and methods for making a surfactant, for enhanced oil recovery (eor) and for recovering an asphaltene-based crude oil. a composition for enhanced oil recovery (eor) applications and method for making it. the composition comprises an alkoxy surfactant of formula (i) or (ii) having one or more polypropoxy group (po) and / or polyethyloxy groups (o): (c ~ 6 ~ h ~ 5 ~ ch ~ 2 ~ ch ~ 2 ~) ~ a ~ -c ~ 6 ~ h ~ b ~ o-po ~ x ~ -e ~ y ~ -so ~ 3 ~ ^ - ^ m ^ + ^ (i) c ~ 6 ~ h ~ 5 ~ ch ~ 2 ~ ch ~ 2 ~) ~ a ~ -c ~ 6 ~ h ~ b ~ o-po ~ x ~ -eo ~ y ~ (ii) where a = 3, b = 2, b = 2, b = 3 or a = 2 to 3, b = 3 to 2; where x is the number of propoxy groups and ranges from 0 to 50; wherein y is the number of ethoxy groups and ranges from 0 to 100 and wherein m is a counterion to the sulfate group and is selected from the group consisting of na, k, mg, ca and nh ~ 4 ~. The alkoxy surfactant of formula (i) or (ii) is prepared by alkoxylating a styryl phenol using propylene oxide (po) and / or ethylene oxide (oil). In the case of the alkoxy surfactant of formula (I), an additional sulfation reaction is required.