Fuel stability additive
OwnerLeslie R. Wolfinventor
Life of this patent
Estimating the term…
Abstract
A fuel additive package is disclosed that prevents degradation of hydrocarbon fuels upon storage and permits extended use of such motor fuels without intake-valve deposit formation in vehicle motors. The additive contains an antioxidant, metal deactivator, corrosion inhibitor, and detergent. The corrosion inhibitor, preferably a carboxylic acid containing a carbon number equal to or less than 18 and the detergent component, preferably a polyisobutylene diamine are selected to avoid antagonistic effects with the antioxidant and metal deactivator components while the antioxidant and metal deactivator components are used in markedly reduced amounts to avoid antagonistic effects resulting in increased intake-valve deposits.
Claims19
A stability-enhancing additive package for a hydrocarbon-fuel comprising:
- (a) an antioxidant comprising an aromatic amine and a hindered phenol wherein the aromatic amine is present in the range of 5.5 to 3.0 weight percent and the hindered phenol is present in the range of 2.7 to 1.2 weight percent;
- (b) a metal deactivator comprising an alkane diamine present in the range of 1.5 to 0.05 weight percent;
- (c) a corrosion inhibitor comprising a carboxylic acid having a carbon number of 18 or less;
- and a
- (d) detergent selected from the group consisting of polyalkylene diamine and polyoxyalkylene diamine.
A stabilized hydrocarbon fuel comprising a hydrocarbon fuel and a stability-inducing additive package, wherein the stability-inducing additive package comprises:
- (a) from 3.0 to 5.0 weight percent N,N′-di-sec-butyl-p-phenylenediamine;
- (b) from 1.2 to 2.7 weight percent 2,6-di-t-butyl phenol;
- (c) from 0.5 to 5.0 weight percent dodecenyl succinic acid;
- and
- (d) from 15 to 70 weight percent polyisobutylene diamine.
Dependencies are inferred from the claim text.