Patent ID: 11912594
Assignee: BAKER HUGHES OILFIELD OPERATIONS LLC
Field: Chemical engineering (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 11:
12. A method for separating oil from water in an aqueous stream comprising oil and water, the method comprising:
making a carbon disulfide-modified amine additive by a process comprising reacting together in one step:
an amine, wherein the amine is selected from the group consisting of cationic starch, cationic cellulose, chitin, chitosan, and combinations thereof carbon disulfide; and
a co-reactant, wherein the co-reactant is an α,β-unsaturated compound selected from the group consisting of methyl acrylate, methyl, methacrylate, ethyl acrylate, 2-ethylhexyl acrylate, acrylonitrile, methyl vinyl ketone, cyclohexenone, chalcone, and combinations thereof;
optionally in the presence of a base catalyst; and

introducing an effective amount of the carbon disulfide-modified amine additive to the aqueous stream to separate at least a portion of oil from the water in the aqueous stream; and
separating at least a portion of oil from the water in the aqueous stream.