Additive concentrates for distillate fuels
AssigneeExxon Research & Engineering Co.
InventorsAlbert Rossi, Kenneth Lewtas
Life of this patent
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Abstract
An additive concentrate for incorporation into wax containing petroleum fuel oil compositions to improve low temperature flow properties comprising an oil solution containing: (a) 3% to 90 wt. % of a C.sub.30 -C.sub.300 oil-soluble nitrogen compound wax crystal growth inhibitor having at least one straight C8-C40 alkyl chain and partial esters, and (b) at least one mole per mole of (a) of an organic acid capable of hydrogen bonding with (a) to improve the solubility of (a) in the oil.
Claims20
An additive concentrate for incorporation into wax containing petroleum fuel oil compositions to improve low temperature flow properties of said oil comprising an oil solution containing
- (a) In the range of 3% to 90 wt. % based on a total weight of the concentrate of a C.sub.30 -C.sub.300 oil-soluble nitrogen compound wax crystal growth inhibitor having at least one straight C.sub.8 -C.sub.40 alkyl chain and being selected from the class consisting of ammonium salts, amine salts and amides of aromatic or cycloaliphatic dicarboxylic acids or anhydrides thereof having 5 to 13 carbon atoms in their cyclic moiety, and mono esters of said acids or anhydrides, said nitrogen compound being formed by reaction of about one to two moles of amine per mole of acid, anhydride or ester;
- and
- (b) one to three moles per mole of (a) of an organic acid capable of hydrogen bonding with (a) and improving the fluidity of said additive concentrate, selected from the group consisting of carboxylic acid, sulfonic acid and phenols.
A method of treating a distillate fuel oil by adding and mixing with a concentrate in an amount sufficient to add within the range of about 0.005 to 0.25 weight % of additive to said oil, said concentrate comprising an oil solution containing
- (a) In the range of 3% to 90 wt. % based on a total weight of the concentrate of a C.sub.30 -C.sub.300 oil-soluble nitrogen compound wax crystal growth inhibitor having at least one straight C.sub.8 -C.sub.40 alkyl chain and being selected from the class consisting of ammonium salts, amine salts and amides of aromatic or cycloaliphatic dicarboxylic acids or anhydrides thereof having 5 to 13 carbon atoms in their cyclic moiety, and mono esters of said acids or anhydrides, said nitrogen compound being formed by reaction of about one to two moles of amine per mole of acid, anhydride or ester;
- and
- (b) one to three moles per mole of (a) of an organic acid capable of hydrogen bonding with (a) and improving the fluidity of said additive concentrate, selected from the group consisting of carboxylic acid, sulfonic acid and phenols.
A distillate fuel oil composition comprising a major proportion of distillate fuel and an additive concentrate in an amount sufficient to incorporate within the range of about 0.005 to 0.25 weight % of additive to said oil, said concentrate comprising an oil solution containing
- (a) In the range of 3% to 90 wt. %, based on a total weight of the concentrate, of a C.sub.30 -C.sub.300 oil-soluble nitrogen compound wax crystal growth inhibitor having at least one straight C.sub.8 -C.sub.40 alkyl chain and being selected from the class consisting of ammonium salts, amine salts and amides of aromatic or cycloaliphatic dicarboxylic acids or anhydrides thereof having 5 to 13 carbon atoms in their cyclic moiety, and mono esters of said acids or anhydrides, said nitrogen compound being formed by reaction of about one to two moles of amine per mole of acid, anhydride or ester;
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- (b) one to three moles per mole of (a) of an organic acid capable of hydrogen bonding with (a) and improving the fluidity of said additive concentrate, selected from the group consisting of carboxylic acid, sulfonic acid and phenols.
Dependencies are inferred from the claim text.