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US 4,261,703 AGranted
Additive combinations and fuels containing them
AssigneeExxon Research & Engineering Co.
InventorsRobert D. Tack, Kenneth Lewtas
Life of this patent
Estimating the term…
Abstract
Three component additive combinations for improving the flow of distillate fuel oils comprise (A) a conventional distillate fuel flow improver (B) a lube oil pour depressant and (C) a polar compound other than certain specified nitrogen compounds which acts as an anti-agglomerant for wax particles in the fuel oil.
Claims22
An additive combination for distillate fuel oils, comprising
- (A) one part by weight of a distillate flow improving composition which is an oil soluble ethylene backbone distillate flow improving polymer having a number average molecular weight in the range of about 500 to 50,000
- (B) 0.1 to 10 parts by weight of a lube oil pour depressant which is an oil soluble polymer of monomers other than ethylene, having a molecular weight in the range of about 1000 to 200,000 and wherein at least 10% by weight of said polymer is in the form of straight chain alkyl groups having 6 to 30 carbon atoms, said polymer comprising unsaturated ester, or olefin, monomer moieties, said moieties comprising a major weight proportion of said polymer;
- and,
- (C) 0.1 to 10 parts by weight of a polar oil soluble compound different from (A) and (B) and of formula RX, other than an oil soluble nitrogen compound containing about 30 to 300 carbon atoms and having at least one straight chain alkyl segment of 8 to 40 carbon and selected from the class consisting of amine salts and/or amides of hydrocarbyl carboxylic acids or anhydrides having 1 to 4 carboxyl groups where R is an oil solubilizing hydrocarbon group and X is a polar group said compound acting as an anti-agglomerant for wax particles in the fuel oil.
1 more element
A fuel composition which comprises distillate fuel oil and from 0.001 to 0.5 wt. % of a flow and filterability improving, multicomponent additive composition comprising:
- (A) one part by weight of a distillate flow improver composition which is an oil soluble ethylene backbone distillate flow improving polymer having a number average molecular weight in the range of about 500 to 50,000
- (B) 0.1 to 10 parts by weight of a lube oil pour depressant which is an oil soluble polymer of monomers other than ethylene, having a molecular weight in the range of about 1000 to 200,000 and wherein at least 10% by weight of said polymer is in the form of straight chain alkyl groups having 6 to 30 carbon atoms, said polymer comprising unsaturated ester, or olefin, monomer moieties, said moieties comprising a major weight proportion of said polymer;
- and,
- (C) 0.1 to 10 parts by weight of a polar oil soluble compound different from (A) and (B) and of formula RX where R is an oil solubilizing hydrocarbon group and X is a polar group other than an oil soluble nitrogen compound containing about 30 to 300 carbon atoms and having at least one straight chain alkyl segment of 8 to 40 carbons and selected from the class consisting of amine and/or amides of hydrocarbyl carboxylic acids or anhydrides having 1 to 4 carboxyl groups which acts as an antiagglomerant for wax particles in the oil.
1 more element
Dependencies are inferred from the claim text.