摘要:
Diesel fuel compositions containing oxygenated compounds derived from tetrahydrofurfuryl having to the general formula: in which —X— is chosen from: —O— and —O—[CH2—O]n— with n comprised between 1 and 20 and —R is chosen from: alkyl groups containing from 1 to 30 carbon atoms; and groups containing a tetrahydrofurfuryl unit.
摘要翻译:含有衍生自四氢糠基的氧化化合物的柴油燃料组合物具有以下通式:其中-X-选自:-O-和-O- [CH 2 -O] n - ,其中n包含在1和20之间,-R选自 :含有1至30个碳原子的烷基; 和含有四氢糠基单元的基团。
摘要:
Detergent additive compositions for gasoline-type fuels comprise at least one compound that corresponds to the general formula: in which R1, R2, R3 and R4 each represent a hydrogen atom or a hydrocarbon radical, for example alkyl, with 1 to 30 carbon atoms, whereby at least one of R1, R2, R3, and R4 is a hydrocarbon radical, n is a number from 1 to 20, m and m′ are each a number from 1 to 30, with m+m′ from 4 to 60. They can be added to gasoline-type fuels at a concentration of 20 to 5000 mg/liter.
摘要:
Compositions that comprise at least one compound that corresponds to general formula (I): in which n is a number from 0 to 20; R1, R2, R3 and R4 each represent a hydrogen atom or a hydrocarbon radical, for example alkyl, with 1 to 30 carbon atoms, whereby at least one of R1, R2, R3, and R4 is a hydrocarbon radical; and m is a number from 1 to 30, can be prepared by a process that comprises the reaction of a hydroxymethylated derivative of tetrahydrofuran with ethylene oxide, then with one or more other epoxidized compounds. These compositions can be used as detergent additives for gasoline-type fuels.
摘要:
A diesel fuel compound has a major proportion of at least one diesel fuel and a minor proportion of at least one glycerol acetal corresponding to one of general formulas: in which: R1 and R2 each represent a hydrogen atom, a hydrocarbon radical with 1 to 20 carbon atoms, aliphatic, cycloaliphatic or aromatic, or an alkyl-ether chain, R1 and R2 being able together to form an oxygenated heterocyclic radical; R3 represents a hydrogen atom or a radical of general formula: where R4 is a radical defined as R1 or R2, except for the hydrogen atom, or a radical of general formula: where R1 and R2 are defined as above, the sum of the number of carbon atoms of R1, R2 and R3 in formulas (1) and (2) being at least 2 and it has no metal compounds of group IIA.
摘要:
A diese fuel composition containing a major proportion of at least one diesel fuel and a minor proportion of at least one glycerol acetal carbonate of the formulae: in which: R1 and R2 each represent a hydrogen atom, a hydrocarbon radical with 1 to 20 carbon atoms that is aliphatic, cycloaliphatic or aromatic, an alkyl-ether chain, whereby R1 and R2 together can form an oxygenated heterocyclic radical; R3 is a radical that is defined as R1 or R2, except for the hydrogen atom, or a radical of the formula: where R1 and R2 are defined as above.
摘要:
The invention relates to the removal of acid compounds from a gaseous effluent in an absorption method using an aqueous solution containing one or more triamines wherein the three amine functions are not connected to each other by rings and whose amine functions in the a and the co positions are always tertiary, and the amine function in central position is always secondary, more or less sterically hindered, and which have the general formula (I) as follows:
摘要:
The invention relates to the removal of acid compounds from a gaseous effluent in an absorption method using an aqueous solution containing one or more diamines whose two amine functions are not connected to each other by rings and whose amine function in the α position is always tertiary and the amine function in the ω position is always either primary or secondary, more or less sterically hindered, and with have the general formula (I) as follows:
摘要:
Colloidal products according to the invention are obtained by a method comprising a step (a) providing a colloidal product containing at least one alkaline earth metal carbonate in micelle form, optionally reacted with at least one compound selected from alkylsulphonic acids and alkylarylsulphonic acids and salts thereof and long chain aliphatic carboxylic acids and salts thereof such as to modify a proportion of up to 70% of the basicity reserve of the original colloidal product and a step (b) in which the residual basicity reserve is neutralized by at least one acid containing at least one element selected from boron, phosphorus and sulphur. These colloidal products can be used as wear resistance and extreme pressure additives in lubricants.
摘要:
Colloidal products containing calcium and/or magnesium plus sulfur and nitrogen are obtained by at least partial neutralization of the basicity reserve of at least one overbasic sulfonate charged with calcium carbonate and/or with magnesium carbonate dispersed within micelles. The neutralization is by means of at least one functional dicarboxylic acid of the formula: ##STR1## where each symbol a is a whole number from 1 to 8, x and z are each a number from 1 to 4, y is a whole number from 0 to 4 and n is 1 or 2. These products can be used as additives in lubricating oils.
摘要:
The degradation of an absorbent solution comprising organic compounds with an amine functional group in aqueous solution is substantially reduced in the presence of a small amount of degradation inhibiting agents belonging to the family of derivatives of triazoles or of a tetrazole at least one substituent of which contains a sulfur atom. The absorbent solution is used to deacidize a gaseous effluent.