Abstract:
The invention provides new methods for the direct umpolung self-condensation of 5-hydroxymethylfurfural (HMF) by organocatalysis, thereby upgrading the readily available substrate into 5,5′-di(hydroxymethyl) furoin (DHMF). While many efficient catalyst systems have been developed for conversion of plant biomass resources into HMF, the invention now provides methods to convert such nonfood biomass directly into DHMF by a simple process as described herein. The invention also provides highly effective new methods for upgrading other biomass furaldehydes and related compound to liquid fuels. The methods include the organocatalytic self-condensation (umpolung) of biomass furaldehydes into (C8-C12)furoin intermediates, followed by hydrogenation, etherification or esterification into oxygenated biodiesel, or hydrodeoxygenation by metal-acid tandem catalysis into premium hydrocarbon fuels.
Abstract:
The invention provides new methods for the direct umpolung self-condensation of 5-hydroxymethylfurfural (HMF) by organocatalysis, thereby upgrading the readily available substrate into 5,5′-di(hydroxymethyl)furoin (DHMF). While many efficient catalyst systems have been developed for conversion of plant biomass resources into HMF, the invention now provides methods to convert such nonfood biomass directly into DHMF by a simple process as described herein. The invention also provides highly effective new methods for upgrading other biomass furaldehydes and related compound to liquid fuels. The methods include the organocatalytic self-condensation (umpolung) of biomass furaldehydes into (C8-C12)furoin intermediates, followed by hydrogenation, etherification or esterification into oxygenated biodiesel, or hydrodeoxygenation by metal-acid tandem catalysis into premium hydrocarbon fuels.
Abstract:
Methods to synthesize useful alcohol and aromatic hydrocarbon products from sorbitol derived from sugars are described. Sorbitol is dehydrated to form furans such as 2-acetylfuran which is hydrogenated to form hexanols, ethyl tetrahydrofuran, etc useful as fuels and chemicals for industry and commerce. Sorbitol may also be heated over a dehydrating catalyst to form aromatic hydrocarbons useful as fuels.
Abstract:
A method for producing at least one compound selected from the group consisting of 1,8-cineole, and 1-methyl-1,4-cyclohexadiene is also described. The method includes culturing a microorganism on or within a culturing media in a container under conditions sufficient for producing the at least one compound.
Abstract:
A hydrocarbon fuel antioxidant comprises a compound having a following molecular structure R1-(CnHm)-R2, a precursor or a derivative of the compound: wherein n and m are positive integers; —(CnHm)— group is a straight chain molecule segment formed by covalent linkage of carbon atoms which are more than or equal to 3 and less than or equal to 50; ,R1 and R2 comprise an aromatic ring or carboxylic acid or hydroxyl radical or alkyl group; the aromatic ring group may either be a single ring or polycyclic, and may also be a heterocycle containing oxygen or nitrogen, which may be provided with or not provided with a substituent group; the antioxidant contains more than one linear chain or ring conjugated bond formed by conjugated double bonds; the ring conjugated double bonds are located on the aromatic ring at the end part; the linear chain conjugated double bonds are located on a carbon chain in the middle; and the antioxidant has a prominent absorption peak in a 250-400 nm ultraviolet wavelength range. The hydrocarbon fuel antioxidant comprises carotinoid, vitamin A or vitamin E. The invention further provides applications and a method of application of the antioxidant. The antioxidant can promote the ultraviolet light stabilization effect of the fuels, but also can promote the oxygen stabilization effect of the fuels, and particularly can promote the combustion efficiency of the fuels and reduce the emission of contaminants when the antioxidant is together used with such additives as cetane number improver and octane number improver.
Abstract translation:烃燃料抗氧化剂包含具有以下分子结构R1-(CnHm)-R2的化合物,化合物的前体或衍生物:其中n和m是正整数; - (C n H m) - 基团是通过大于或等于3并且小于或等于50的碳原子的共价连接形成的直链分子链段; ,R 1和R 2包含芳环或羧酸或羟基或烷基; 芳环基可以是单环或多环,并且也可以是含有氧或氮的杂环,其可以具有或不具有取代基; 抗氧化剂含有多于一个由共轭双键形成的直链或环共轭键; 环共轭双键位于端部的芳环上; 线性链共轭双键位于中间的碳链上; 并且抗氧化剂在250-400nm紫外线波长范围内具有显着的吸收峰。 烃类燃料抗氧化剂包括类胡萝卜素,维生素A或维生素E.本发明还提供了抗氧化剂的应用和应用的方法。 抗氧化剂可以促进燃料的紫外光稳定作用,而且可以促进燃料的氧稳定化作用,特别是可以提高燃料的燃烧效率,并且当抗氧化剂与这种添加剂一起使用时减少污染物的排放 作为十六烷值改进剂和辛烷值改进剂。
Abstract:
The present invention relates to a liquid fuel composition comprising a mixture of hydrocarbons and a cyclic hydrocarbon compound that suppresses the emission of soot particulates. The present invention also relates to a method for reducing the emission of soot particulates in the exhaust gases of an internal combustion engine. It is desirable for the cyclic hydrocarbon compound to contain one or more oxygen atoms.
Abstract:
An additive composition improves the stability and the engine performances of gas oils, including gas oils of the non-road type in compliance with the decree of 10 Dec. 2010, including: (a) at least one metal deactivator or chelating agent, (b) at least one antioxidant of the hindered phenol type (alkylphenol), (c) at least one dispersant and/or detergent, (d) at least one metal passivator, where the compositions include improved properties, in particular relative to the oxidation resistance, storage stability, thermal stability, reduction in fouling of the injectors, reduction in loss of power, reduction in the tendency of the filters to clog.
Abstract:
Disclosed are biodiesel fuels with improved oxidative stability. Disclosed are biodiesel fuels which comprise two or more antioxidants which increase the oxidative stability of the biodiesel fuel.
Abstract:
Gasoline compositions are provided comprising component A, an alkyl alkenoate compound, or a mixture of alkyl alkenoate compounds, selected from compounds of formula I: wherein R1 is a linear alkenyl group containing 3 to 5 carbon atoms, optionally substituted by a methyl group, and R2 is a linear or branched alkyl group containing 1 to 6 carbon atoms, with the proviso that component A has a boiling point or boiling point range within the temperature range of from 90 to 200° C., and at least one additional selected component.
Abstract:
A process for producing biofuels by transforming triglycerides into at least two families of biofuels, monoesters of fatty acids and soluble ethers and/or acetals of glycerol, comprises: at least one transesterification step in which said triglyceride is reacted by heterogeneous catalysis with at least one primary monoalcohol selected from methanol and ethanol to produce at least one methyl and/or ethyl ester of the fatty acids of the starting triglycerides and glycerol, said products being free of by-products; and an etherification step in which the glycerol is reacted with at least one olefinic hydrocarbon containing 4 to 12 carbon atoms; and/or an acetalization step in which the glycerol is reacted with at least one compound selected from aldehydes, ketones and acetals derived from aldehydes or ketones.