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

Claim 0:
1. 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 selected from the group consisting of synthetic amines, natural amines, chemically modified natural amines, and combinations thereof;
carbon disulfide; and
a co-reactant selected from the group consisting of an epoxide, an α,β-unsaturated compound, and combinations thereof,
wherein if the co-reactant is an epoxide, it is selected from the group consisting of ethylene oxide, propylene oxide, 1,2-buteneoxide, cyclohexene oxide, styrene oxide and combinations thereof; and
where if the co-reactant is an α,β-unsaturated compound, it is 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 selected from a group consisting of sodium hydroxide, potassium hydroxide, ammonia, sodium ethylate, sodium methylate, sodium carbonate, sodium bicarbonate, and combinations thereof; 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.