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US 12,584,006 B2Granted
Blends of ethylene vinyl acetate copolymer and alpha olefin maleic anhydride copolymer as heavy pour point depressants
AssigneeEcolab USA Inc.
InventorAlexander Coleman Pearson
Life of this patent
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Abstract
A composition is provided that includes about 2 wt. % to about 25 wt. % of a copolymer including ethylene and vinyl acetate; about 2 wt. % to about 20 wt. % of a copolymer including an α-olefin and maleic anhydride; and about 55 wt. % to about 96 wt. % of a solvent. The composition can be used to decrease the pour point of a hydrocarbon, such as crude oil.
Claims4
A composition for lowering a pour point of a hydrocarbon, comprising:
- about 20 ppm to about 40 ppm of a copolymer of ethylene and vinyl acetate, wherein the copolymer of ethylene and vinyl acetate comprises a weight average molecular weight of about 25,000 Da to about 85,000 Da and a vinyl acetate content of about 28 wt. % to about 42 wt. %;
- about 70 ppm to about 141 ppm of a reaction product of a copolymer of a C24-C28 and C30+ α-olefin and maleic anhydride with a C20-C28 alcohol mixture;
- and
- a solvent comprising a remainder of the composition, based on a total amount of about 500 ppm to about 1000 ppm of the composition,
- wherein the solvent is selected from the group consisting of toluene, naphtha, kerosene, heavy aromatic naphtha, a de-aromatized aliphatic hydrocarbon, an alcohol, and any combination thereof,
- wherein the composition in the amount of about 500 ppm to about 1,000 ppm is combined with a hydrocarbon,
- wherein the hydrocarbon is selected from the group consisting of topped crude oil, crude oil, vacuum gas oil, a heavy distillate refiner product, slop oil, a fuel oil, and any combination thereof, and
- further wherein the composition lowers the pour point of the hydrocarbon by about 3° C. to about 15° C.
5 more elements
A method of decreasing a pour point of a hydrocarbon, comprising:
- adding from about 250 ppm to about 450 ppm of a composition to the hydrocarbon, the composition comprising:
- about 2 wt. % to about 8 wt. % of a copolymer of ethylene and vinyl acetate, wherein the copolymer of ethylene and vinyl acetate comprises a weight average molecular weight of about 25,000 Da to about 85,000 Da and a vinyl acetate content of about 28 wt. % to about 42 wt. %;
- about 16 wt. % to about 20 wt. % of a reaction product of a C20-C24 α-olefin and maleic anhydride copolymer with a hydrogenated tallow amine;
- and
- about 75 wt. % to about 82 wt. % of a solvent,
- wherein the solvent is selected from the group consisting of toluene, naphtha, kerosene, heavy aromatic naphtha, a de-aromatized aliphatic hydrocarbon, an alcohol, and any combination thereof,
- wherein the α-olefin and maleic anhydride copolymer is about 50% to about 100% amidated,
- wherein the hydrocarbon is selected from the group consisting of topped crude oil, crude oil, vacuum gas oil, a heavy distillate refiner product, slop oil, a fuel oil, and any combination thereof, and
- further wherein the composition lowers the pour point of the hydrocarbon by about 3° C. to about 15° C.
6 more elements
Dependencies are inferred from the claim text.