Method for synthesizing low sulfur diesel anti-wear agent by one-step method

A technology of low-sulfur diesel oil and anti-wear agent, which is used in the petroleum industry, fuel additives, chemical recycling, etc., can solve problems such as diesel engine corrosion, and achieve the effects of increasing entanglement density, improving lubricity, and improving wear resistance.

Active Publication Date: 2019-04-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the polar groups of diesel antiwear agents are all at the end of the molecular chain, such as long-chain fatty acids, etc., and the entanglement of the non-polar long chain belongs to unilateral entanglement, which requires a relatively large polarity and acid value. Therefore, the acid value of the existing acid type antiwear agent products is usually ≮190mgKOH / g, which is easy to cause corrosion and other hazards to diesel engines, and its antiwear performance needs to be further improved

Method used

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  • Method for synthesizing low sulfur diesel anti-wear agent by one-step method
  • Method for synthesizing low sulfur diesel anti-wear agent by one-step method
  • Method for synthesizing low sulfur diesel anti-wear agent by one-step method

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Mesoporous alumina-supported nickel metal catalyst: Dissolve 18g triblock copolymer P123(EO)20(PO)70(EO)20 in 100ml ethanol solvent, mix well, then add 20g aluminum isopropoxide under stirring condition and 1.4g of nickel nitrate hexahydrate, continue to stir for 24h, dry at 60°C, heat up to 600°C at a rate of 2°C / min, and calcinate for 10h to obtain a mesoporous alumina-supported nickel catalyst.

[0030] Mix 91.5g diethyl maleate, 100g soybean oil fatty acid (iodine value 130mgKOH / g), 15g mesoporous alumina-supported nickel catalyst, react at 200°C, 300rpm for 3h, and end the reaction. After the system was cooled to room temperature, the mesoporous alumina-supported nickel catalyst was removed by filtration, and the unreacted diethyl maleate and vegetable oil fatty acid were removed by vacuum distillation at a pressure of 65 Pa and 200°C for 2 hours to obtain the antiwear agent product A. The molecular conversion rate of soybean oil fatty acid was 55.1%. After testin...

Embodiment 2

[0033] The same catalyst as in Example 1 was used.

[0034] 123.8g of diethyl maleate, 100g of soybean oil fatty acid, and 20g of mesoporous alumina-supported nickel catalyst were mixed, reacted at 220°C and 300rpm for 2h, and then ended the reaction. After the system was cooled to room temperature, the mesoporous alumina-supported nickel catalyst was removed by filtration, and the unreacted diethyl maleate and vegetable oil fatty acid were removed by vacuum distillation at a pressure of 65 Pa and 200°C for 2 hours to obtain the antiwear agent product B. The molecular conversion rate of soybean oil fatty acid was 57.2%. After testing, the acid value of the product is 118.5mgKOH / g, and the freezing point is -26.7°C.

Embodiment 3

[0036] The same catalyst as in Example 1 was used.

[0037] 49.5g of diethyl maleate, 100g of soybean oil fatty acid, and 5g of mesoporous alumina-supported nickel catalyst were mixed, reacted at 180°C and 300rpm for 4h, and then ended the reaction. After the system was cooled to room temperature, the mesoporous alumina-supported nickel catalyst was removed by filtration, and the unreacted diethyl maleate and vegetable oil fatty acid were removed by vacuum distillation at a pressure of 65 Pa and 200°C for 2 hours to obtain the antiwear agent product C. The molecular conversion rate of soybean oil fatty acid was 50.6%. After testing, the acid value of the product is 123.2 mgKOH / g, and the freezing point is -25.5°C.

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Abstract

The invention relates to a method for synthesizing a low sulfur diesel anti-wear agent by a one-step method. According to the method, unsaturated carboxylic acid ester, vegetable oil fatty acid and acatalyst are mixed in proportion, and a reaction is performed for a certain period of time under stirring at 180-220 DEG C; the catalyst is an aluminum oxide-supported active metal catalyst, and active metal is at least one of nickel, copper, iron, cobalt, chromium, silver, and the like; and after the reaction is completed, the temperature is lowered, the catalyst is recovered, and an anti-wear agent product is obtained by distillation under reduced pressure. The synthesized anti-wear agent of the invention can improve the lubricity of low sulfur diesel oil, is low in product condensation point, and is low in blending ratio with the low sulfur diesel, and can make the low sulfur diesel meet national V lubricity standards and condensation point requirements after blending; and a productionprocess is simple and pollution-free, the catalyst can be reused, and the method is beneficial to industrial production.

Description

technical field [0001] The invention belongs to the field of oil additives, and in particular relates to a method for synthesizing a low-sulfur diesel antiwear agent in one step. Background technique [0002] With the widespread use of diesel engines, the consumption of diesel is increasing year by year. However, a large amount of diesel consumption will inevitably lead to further aggravation of vehicle emissions of harmful substances. Due to the serious impact of emissions on the ecological environment, human health and economic development, governments of various countries have successively formulated strict emission regulations to limit the harmful emissions of diesel vehicles. With the implementation of the National IV and National V standards for diesel in my country, the sulfur content of diesel will drop below 10ppm, and desulfurized diesel has been implemented in domestic refineries. At present, sulfur reduction technologies such as hydrotreating and hydrocracking ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11C1/00C10L1/188C10L10/08
CPCC10L1/1888C10L10/08C11C1/00Y02P20/584
Inventor 李澜鹏李志瑞曹长海李秀峥王宜迪雒亚东
Owner CHINA PETROLEUM & CHEM CORP
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