Cold flow improvers for distillate fuel compositions
AssigneeEquistar Chemicals, LP
InventorMaged G. Botros
Life of this patent
Estimating the term…
Abstract
An additive combination for distillate fuels and a fuel composition having improved cold flow properties. The additive combination is incorporated into a major proportion of distillate fuel and is comprised of an ethylene vinyl acetate isobutylene terpolymer in combination with one or more of a maleic anhydride α-olefin copolymer component, a polyimide component, and an alkyl phenol component each having one or more hydrocarbon substituents within specified carbon number ranges. Optionally, an ethylene vinyl acetate copolymer may also be incorporated as a component therein.
Claims25
A distillate fuel composition having improved cold flow properties comprising a major proportion of a distillate fuel and an additive combination in an amount effective to improve cold flow properties;
- wherein the additive combination comprises an ethylene vinyl acetate isobutylene terpolymer and a maleic anhydride α-olefin copolymer component having the structure:
- wherein R is a hydrocarbon substituent and at least 60% by weight of R is C16 to C40, and n is from about 2 to about 8.
A distillate fuel composition having improved cold flow properties comprising a major proportion of a distillate fuel and an additive combination in an amount effective to improve cold flow properties;
- wherein the additive combination comprises an ethylene vinyl acetate isobutylene terpolymer and an imide component having the structure:
- wherein R and R′ are hydrocarbon substituents;
- at least 60% by weight of R is C20 to C40;
- at least 80% by weight of R′ is C16 to C18, and n is from about 2 to about 8.
A distillate fuel composition having improved cold flow properties comprising a major proportion of a distillate fuel and an additive combination in an amount effective to improve cold flow properties;
- wherein the additive combination comprises:
- (A) an ethylene vinyl acetate isobutylene terpolymer;
- and
- (B) an alkyl phenol component having the structure:
- wherein RAP is a hydrocarbon substituent and at least 70% by weight of RAP is C20 to C28.
A distillate fuel composition having improved cold flow properties comprising a major proportion of a distillate fuel and an additive combination in an amount effective to improve cold flow properties;
- wherein the additive combination comprises:
- (A) an ethylene vinyl acetate isobutylene terpolymer;
- (B) a maleic anhydride α-olefin copolymer component having the structure:
- wherein R is a hydrocarbon substituent and at least 60% by weight of R is C16 to C40, and n is from about 2 to about 8;
- and
- (C) an alkyl phenol component having the structure:
- wherein RAP is a hydrocarbon substituent and at least 70% by weight of RAP is C20 to C28.
A distillate fuel composition having improved cold flow properties comprising a major proportion of a distillate fuel and an additive combination in an amount effective to improve cold flow properties;
- wherein the additive combination comprises:
- (A) an ethylene vinyl acetate isobutylene terpolymer;
- (B) a maleic anhydride α-olefin copolymer component having the structure:
- wherein R is a hydrocarbon substituent and at least 60% by weight of R is C16 to C40, and n is from about 2 to about 8;
- (C) an alkyl phenol component having the structure:
- wherein RAP is a hydrocarbon substituent and at least 70% by weight of RAP is C20 to C28;
- and
- (D) an ethylene vinyl acetate copolymer component.
An additive combination for improving the cold flow properties of a distillate fuel, said additive combination comprising an ethylene vinyl acetate isobutylene terpolymer and a maleic anhydride α-olefin copolymer component having the structure:
- wherein R is a hydrocarbon substituent and at least 60% by weight of R is C16 to C40, n is from about 2 to about 8.
An additive combination for improving cold flow properties of a distillate fuel, said additive combination comprising an ethylene vinyl acetate isobutylene terpolymer and an imide component having the structure:
- wherein R and R′ are hydrocarbon substituents;
- at least 60% by weight of R is C20 to C40;
- at least 80% by weight of R′ is C16 to C18;
- and n is from about 2 to about 8.
An additive combination for improving the cold flow properties of a distillate fuel, said additive combination comprising an ethylene vinyl acetate isobutylene terpolymer and an alkyl phenol component having the structure:
- wherein RAP is a hydrocarbon substituent and at least 70% by weight of RAP is C20 to C28.
Dependencies are inferred from the claim text.