Ultra-low-sulfur diesel lubricating property improver and preparation method thereof

A technology of ultra-low sulfur diesel oil and lubricating performance, which is used in the petroleum industry, fuel additives, liquid carbon-containing fuels, etc., can solve the problems of fuel filter clogging, high acid value, increased cost, etc., and achieves low production cost and short process. , the effect of cleaning the production process

Inactive Publication Date: 2013-06-26
BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the low-sulfur diesel lubricity improvers currently used in the industry are mainly fatty acids, but due to their high acid value and high freezing point, they not only affect the storage stability of diesel fuel, but also easily react with alkaline detergents in diesel fuel , and it is easy to cause clogging of the fuel filter, and additional detergents and antioxidants need to be added, increasing its cost

Method used

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  • Ultra-low-sulfur diesel lubricating property improver and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Weigh 186 g of glycerin (chemically pure), 140 g of mixed fatty acids (that is, the mixed fatty acids produced by hydrolysis of animal and vegetable oils, carbon number range C12-C22, average molecular weight 280), 3.7 g of isobutanol (chemically pure), namely glycerin, The molar ratio of mixed fatty acid to isobutanol is 4:1.0:0.1; add imidazole cationic ionic liquid catalyst (self-made) 13.19g, accounting for 4% of the total mass of the reaction mixture; react in a stainless steel kettle with a volume of 1000 ml, The reaction temperature is 100°C, the stirring speed is 800 revolutions per minute, the reaction pressure is 0.1MPa, and the reaction time is 2 hours; after the reaction is completed, the reaction mixture is lowered to room temperature and allowed to stand for stratification, the upper layer is the target product, and the lower layer is unreacted glycerin , the catalyst ionic liquid and the by-product water generated by the reaction; the upper reactant was an...

Embodiment 2

[0022] Weigh 232.5 g of glycerin (chemically pure), 156 g of mixed fatty acids (same as Example 1, carbon number range C12-C22, average molecular weight 280), 4.5 g of isopropanol (chemically pure), that is, glycerin, mixed fatty acids and isopropanol The molar ratio is 5:1.1:0.15; add 31.44g of imidazole cationic ionic liquid catalyst (self-made), accounting for 8% of the total mass of the reaction mixture; react in a stirred stainless steel tank with a volume of 1000 ml, and the reaction temperature is 120°C. The stirring speed is 800 revolutions per minute, the reaction pressure is 0.1MPa, and the reaction time is 2 hours; after the reaction, the reaction mixture is lowered to room temperature and allowed to stand for stratification. The upper layer is the target product, and the lower layer is unreacted glycerin, catalyst ionic liquid and reaction mixture. The generated by-product water; the upper reactant was subjected to gas chromatography analysis and acid value and lubr...

Embodiment 3

[0024] Weigh 279 g of glycerin (chemically pure), 168 g of mixed fatty acids (same as Example 1, carbon number range C12-C22, average molecular weight 280), 7.4 g of isobutanol (chemically pure), namely glycerin, mixed fatty acids and isobutanol The molar ratio is 6:1.2:0.2; add 54.53g of imidazole cationic ionic liquid catalyst (self-made), accounting for 12% of the total mass of the reaction mixture; react in a stirred stainless steel tank with a volume of 1000 ml, and the reaction temperature is 150°C. The stirring speed is 800 revolutions per minute, the reaction pressure is 0.2 MPa, and the reaction time is 1 hour; after the reaction, the reaction mixture is lowered to room temperature and allowed to stand for stratification. The upper layer is the target product, and the lower layer is unreacted glycerin, catalyst ionic liquid and reaction mixture. The generated by-product water; the upper reactant was subjected to gas chromatography analysis and acid value and lubricatin...

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Abstract

The invention relates to an ultra-low-sulfur diesel lubricating property improver and a preparation method thereof. The improver is a mixture of monoglyceride, fatty acid and low-molecular-weight alcohol. The improver has acid value being lower than 30.0mgKOH/g and a condensation point being lower than -1 DEG C. according to the preparation method, biodiesel co-product glycerin and low-molecular-weight alcohols serving as the raw materials have esterification reaction with the fatty acid in the presence of an ionic liquid catalyst to generate the mixture of monoglyceride, fatty acid and low-molecular-weight alcohols, namely the ultra-low-sulfur diesel lubricating property improver, wherein the addition of the improver relative to low-sulfur diesel is 50mu g/g, the temperature is 100-170 DEG C, the pressure is 0.1-0.2MPa and the time is 1-2 hours. The detailed preparation method refers to the specification. The low-sulfur diesel lubricating property improver has low acid value and high lubrication improvement property, can be directly used without use of antioxidants and cleaning agents; production cost is low, the production process is clean and the production flow is short.

Description

technical field [0001] The invention relates to a lubricity improver, in particular to an ultra-low sulfur diesel lubricity improver and a preparation method thereof. technical background [0002] In the fuel system of a diesel engine, diesel oil is used not only as a fuel but also as a lubricant for high-pressure oil pumps, oil delivery pumps, injectors and valves. The sulfur in diesel fuel plays a major role in lubricating the mechanical components in the diesel engine system. With increasingly stringent environmental protection regulations, diesel fuel has been under environmental pressure due to its high sulfur content. In order to improve the atmospheric environment that human beings depend on and improve the quality of diesel engine exhaust emissions, domestic and foreign fuel oil production enterprises have begun to adopt deep processing and refining processes in recent years to produce low-sulfur diesel oil characterized by low sulfur content and low aromatic hydroc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/19C10L1/188C10L1/182C10L10/08
Inventor 姚志龙庞小英袁吴魏孙培永高俊斌尹振晏
Owner BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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