Abstract:
A method of making cerium dioxide nanoparticles includes: a) providing an aqueous reaction mixture having a source of cerous ion, a source of hydroxide ion, a nanoparticle stabilizer, and an oxidant at an initial temperature no higher than about 2O°C; b) mechanically shearing the mixture and causing it to pass through a perforated screen, thereby forming a suspension of cerium hydroxide nanoparticles; and c) raising the initial temperature to achieve oxidation of cerous ion to eerie ion and thereby form cerium dioxide nanoparticles having a mean diameter in the range of about 1 nm to about 15 nm. The cerium dioxide nanoparticles may be formed in a continuous process.
Abstract:
A reverse-micellar composition contains a first aqueous disperse phase that includes a free radical initiator, and a continuous phase that includes a hydrocarbon liquid and at least one surfactant.
Abstract:
An emulsified biofuel composition comprising: (A) a continuous phase comprising about 50-95 wt% of at least one liquid oil of vegetable or animal origin or mixtures thereof; (B) a water- containing dispersed phase comprising about 1-50 wt% water; (C) about 1-25 wt% of hydroxyl-containing organic compound selected from the group consisting of mono-, di-, tri- and polyhydric alcohols, provided that when a monohydric alcohol is used there is also present at least one of tert-butyl alcohol, at least one C2-C4 alkylene glycol or a mixture of both; (D) about 0.05-10 wt% of at least one emulsifier; wherein the dispersed water-containing droplets have an average particle size of less than about 20 microns. The biofuel is prepared from these components by mixing under high shear conditions, preferably with ultrasonic energy. The emulsifier(s) preferably exhibit a hydrophilic-lipophilic balance of about 8.5 to about 18 and the biofuel includes a cetane enhancer and mixture of an alcohol and mono- or poly-alkylene glycol.
Abstract:
The present invention relates to an “alcohol based fuel and/or biofuel composition” having as a main feature the capacity of totally or partially substituting traditional fuels, such as gasoline and diesel, in conventional internal combustion engines. In addition, the “alcohol based fuel and/or biofuel composition” can be used for the total or partial substitution of burning oils.
Abstract:
Considerable progress has been made in recent years in reducing toxic exhaust emissions from diesel engines. Diesel oxidation catalysts, for example, are finding increasing use in reducing carbon monoxide, hydrocarbons and the soluble organic fraction of particulate matter in such emissions. Recent innovations in surfactant stabilizing additives now enable ethanol to be blended with diesel fuel in clear, stable solutions. On combustion, ethanol/diesel fuels generate less toxic emissions than the base diesel, but surprisingly when used in conjunction with diesel oxidation catalysts, particulate matter especially is dramatically reduced. The effectiveness of a diesel oxidation catalyst attached to a diesel engine exhaust is unexpectedly enhanced by the presence of ethanol in the diesel fuel.
Abstract:
A fuel composition of the present invention comprises (a) a diesel fuel, (b) ethanol, (c) a surfactant, and optionally (d) a combustion improver. Methods employ the fuel composition of the present invention to provide a stable fuel composition, to improve lubricity of a fuel composition and to reduce exhaust emissions of a compression-ignited internal combustion engine.
Abstract:
There is described a fuel composition which is substantially free of alkoxylated compounds and is substantially free of long-chain alkyl alcohols having at least 6 C atoms, and contains at least 95 % by volume of a hydrocarbon-based fuel and 0.1 to 5 % by volume of an additive of the formula (I); R-CO-NR R (I) in which R is a saturated or unsaturated, linear or branched alkyl radical having 6 to 21 C atoms; and R and R , which may be the same or different, each represent a hydroxyalkyl radical having 1 to 4 atoms.
Abstract translation:描述了一种燃料组合物,其基本上不含烷氧基化合物,并且基本上不含具有至少6个C原子的长链烷基醇,并且含有至少95体积%的烃基燃料和0.1至5% 式(I)的添加剂的体积; R-CO-NR 1 R 2(I)其中R是具有6至21个C原子的饱和或不饱和的直链或支链烷基; 和R 1和R 2可以相同或不同,分别代表具有1-4个原子的羟基烷基。
Abstract:
The invention provides a fuel oil composition comprising a major proportion of liquid hydrocarbon middle distillate fuel oil having a sulphur concentration of at most 0.05% by weight, and a minor proportion of a dispersant additive obtained by reacting, in a molar ratio A:B in the range 4:3 to 1:10, (A) a polyakenyl derivative of monoethylenically unsaturated C4-C10 dicarboxylic acid material in which the number average molecular weight (Mn) of the polyalkenyl chain is in the range from 850 to 1150 with (B) a polyamine of the general formula H2N(CH2)m-[NH(CH2)m]n-NH2 where m is in the range from 2 to 4 and n is in the range from 1 to 6; a process for the preparation of such a fuel composition; and a method of operating a compression-ignition engine with enhanced injector cleanliness using such a fuel oil composition.
Abstract:
This invention provides a fuel oil composition comprising a major amount of a fuel oil and a minor amount of an additive comprising at least one fuel oil-soluble alkyl or alkoxy aromatic compound wherein at least one group independently selected from alkyl and alkoxy groups of 1 to 30 carbon atoms is attached to an aromatic nucleus and at least one carboxyl group and optionally one or two hydroxyl groups are attached to the aromatic nucleus; a process for the preparation of such a fuel oil composition; and the use of such a fuel oil composition as fuel in a compression-ignition engine for controlling wear rate in the fuel injection system thereof.
Abstract:
A process for reducing liner lacquering in a marine diesel is described, which process comprises adding to the fuel a liner lacquering reducing amount of a fuel-soluble composition comprising (A) at least one diesel detergent, and (B) at least one combustion improver. The detergent is preferably an imide or amide formed by the reaction of a polyalkene substituted succinic acylating agent and an amine, particularly a succinimide, and the combustion improver is preferably a cerium oxidic compound.