Abstract:
An additive composition for improving low temperature flow properties of a wax-containing petroleum distillate fuel comprises:
A. an amorphous, normally solid, essentially saturated hydrocarbons fraction substantially free of normal paraffin hydrocarbons; B. a wax modifying random copolymer of ethylene and an unsaturated ester; and C. a fuel-soluble liquid or solid ether.
Examples of the components are (A) those obtained from deasphalting a residual petroleum fraction and removal of normal paraffins, (B) ethylene-vinyl acetate and ethylene- methyl methacrylate polymers, (C) an alkyl diphenyl ether in which the alkyl group is a dimerized C 16 alpha olefin. Preferred treat rates are from 0.15 to 0.75 wt % based on the middle distillate fuel, particularly one boiling within the limits 120°C to 450°C.
Abstract:
A residual fuel oil composition comprises a residual fuel oil, preferably a No.6 fuel oil, having present therein an amount of at least one zirconium salt and at least one cerium salt. The salts are of defined fatty acids, tall oil or naphthenic acid, or of defined alcohols, phenols and sulfonic acids. The total amount of salts present is such as to be sufficient to decrease the quantity of particulate matter which will form when the fuel is combusted. Preferred salts are octanoates. Suitably 1 to 1000 ppm in total, calculated as metals, of additives are present.
Abstract:
A residual fuel oil composition comprises a residual fuel oil, preferably a No.6 fuel oil, having present therein an amount of at least one zirconium salt and at least one cerium salt. The salts are of defined fatty acids, tall oil or naphthenic acid, or of defined alcohols, phenols and sulfonic acids. The total amount of salts present is such as to be sufficient to decrease the quantity of particulate matter which will form when the fuel is combusted. Preferred salts are octanoates. Suitably 1 to 1000 ppm in total, calculated as metals, of additives are present.
Abstract:
The detection method comprises contacting the hydrocarbon with a mixture comprising:
i. an alcohol-soluble, hydrocarbon-insoluble dye; and ii. a solid which is insoluble in the hydrocarbon and alcohol, whereby the mixture undergoes a color change in the presence of alcohol.
The hydrocarbon sample preferably is contacted with a drying agent to remove dissolved water prior to contacting the mixture. The method is suited, for example, to the detection of an alcohol in a hydrocarbon fuel, more especially a gasoline. Preferred solids are Group IIA metal salts, preferably calcium carbonate. A preferred dye is hexamethyl p- rosaniline chloride.
Abstract:
An additive composition for improving the low temperature flow properties of a wax-containing petroleum distillate fuel comprises:
A. an amide and/or amine salt of a carboxylic acid and/or anhydride; B. an ethylene polymer and/or copolymer; C. a condensation product of a halogenated paraffin or an olefin with an aromatic compound; D. an alkylated diphenyl ether. Examples of each component are (A) tetraalkyl ammonium phthalamate, (B) ethylene vinyl acetate, (C) a wax-naphthalene condensate, and (D) diphenyl ether alkylated with a dimer of a C 24 alpha olefin.
Preferred treat rates are from 0.01 to 0.15 wt % of (A); 0.005 to 0.5 wt % of each of (B) and (D); and 0.002 to 0.1 wt % of (C), each based on the fuel, which is preferably one having a boiling range within the limits 120°C and 450°C.
Abstract:
A middle distillate fuel having added thereto deasphalted residumm and a copolymer comprising ethylene and at least one other unsaturated monomer has improved low temperature flow properties as compared with either additive alone. The copolymer preferably is selected from the group consisting of ethylene vinyl acetate, ethylene vinyl chloride and mixtures thereof.
Abstract:
A residual fuel oil composition comprises a residual fuel oil, preferably at No. 6 fuel oil, having dissolved therein an effective total amount of at least one zirconium salt of (i) an alcohol, or (ii) a phenol, each having a C 2 to C 24 hydrocarbyl group, or (iii) of a hydrocarbyl sulfonic acid such that the salt has a mol. wt of 100 to 2500, or of any mixture thereof; said effective total amount of the salt(s) being sufficient to reduce the amount of particulate matter which will be formed when, in use, the residual fuel oil is combusted. Suitably 1 to 1000 ppm of zirconium salt(s), calculated as metallic zirconium, are present. Preferred zirconium salts are zirconium propoxide or dodecyl benzene sulfonate. The composition is suitable for combustion in industrial boilers and refinery furnaces, preferably being fed in air or steam-atomized form.