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A kind of improver for improving the lubricity of low-sulfur diesel oil and its synthesis method

A low-sulfur diesel oil and synthetic method technology, applied in the petroleum industry, fuel additives, liquid carbon-containing fuels, etc., can solve the problems of increasing the risk of clogging the filter screen of the engine fuel supply pump, losing the fluidity of diesel oil, and increasing the viscosity of diesel oil, etc. The source of raw materials, easy industrial production, and the effect of improving lubricity

Active Publication Date: 2021-08-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above-mentioned patent needs to remove saturated fatty acids by rectification or co-crystallization, but the product still contains a small amount of saturated fatty acids, and crystals will precipitate during long-term low-temperature storage, and the precipitated saturated fatty acid crystals will increase the viscosity of diesel oil and increase the blockage of the engine fuel supply pump. The risk of filter screen, even make diesel oil lose fluidity at low temperature
At the same time, there are problems of high acid value and high freezing point, so it is not suitable for cold regions

Method used

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  • A kind of improver for improving the lubricity of low-sulfur diesel oil and its synthesis method
  • A kind of improver for improving the lubricity of low-sulfur diesel oil and its synthesis method
  • A kind of improver for improving the lubricity of low-sulfur diesel oil and its synthesis method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Add hydroquinone to tungoleic acid (commercial tungoleic acid, Anhui Ruifengde Oil Deep Processing Co., Ltd., model: T160) according to the mass fraction of 0.06%, mix well, blow nitrogen for 30min, and then pass the metering pump for 7.5h -1 The space velocity of the mixed liquid is sent into the microchannel reactor, and at the same time, the ethylene gas is sent into the microchannel reactor through a metering pump according to the gas-liquid molar ratio of 15. The material of the microchannel reactor is stainless steel, and the structure is heart-shaped. The inner diameter of the vessel is 0.5mm, and the reaction temperature is controlled at 130°C. After the reaction, the improver product was obtained by distilling at a pressure of 65 Pa and 200°C for 2 hours. The conversion rate of carbon-carbon conjugated double bond of oleic acid was calculated to be 96.1%. After testing, the acid value of the product is 180.2mgKOH / g, and the freezing point of the product is -25...

Embodiment 2

[0036] Add hydroquinone to oleic acid according to the mass fraction of 0.02%, mix well, blow nitrogen for 30min, and then pass the metering pump for 5h -1 The space velocity of the mixed liquid is sent into the microchannel reactor, and at the same time, the ethylene gas is sent into the microchannel reactor through the metering pump according to the gas-liquid molar ratio of 10. The material of the microchannel reactor is stainless steel, and the structure is heart-shaped. The inner diameter of the vessel is 0.5mm, and the reaction temperature is controlled at 110°C. After the reaction, the improver product was obtained by distilling at a pressure of 65 Pa and 200°C for 2 hours. The conversion rate of the carbon-carbon conjugated double bond of oleic acid is 93.5%, the acid value of the product is 181.5, and the freezing point is -25.7°C.

Embodiment 3

[0038] Add hydroquinone to oleic acid according to the mass fraction of 0.1%, mix well, blow nitrogen for 30min, and then pass the metering pump according to 10h -1 The space velocity of the mixed liquid is sent into the microchannel reactor, and at the same time, the ethylene gas is sent into the microchannel reactor through the metering pump according to the gas-liquid molar ratio of 20. The material of the microchannel reactor is stainless steel, and the structure is heart-shaped. The inner diameter of the vessel is 0.5mm, and the reaction temperature is controlled at 150°C. After the reaction, the improver product was obtained by distilling at a pressure of 65 Pa and 200°C for 2 hours. The conversion rate of the carbon-carbon conjugated double bond of oleic acid is 96.7%, the acid value of the product is 180.0mgKOH / g, and the freezing point is -25.6°C.

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Abstract

The invention relates to an improver for improving the lubricity of low-sulfur diesel oil and a synthesis method thereof. The method is to mix oleic acid and a polymerization inhibitor in proportion, and then send the mixed liquid and olefin gas into a microchannel reactor in proportion. The reaction is carried out at 110-150°C, and after the reaction is completed, vacuum distillation is carried out to obtain a lubricity improver product. The improver prepared by the invention has the characteristics of good lubricity, low freezing point, low blending ratio, etc. After blending, the low-sulfur diesel oil can meet the national V lubricity standard and freezing point requirements.

Description

technical field [0001] The invention belongs to the technical field of diesel oil additives, and in particular relates to an improver for improving the lubricity of low-sulfur diesel oil and a synthesis method thereof. 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 V standard 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 hydrotrea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L1/188C10L1/16C10L1/04C10L10/08C10L10/14C10L10/04
CPCC10L1/04C10L1/14C10L1/16C10L1/1881C10L10/04C10L10/08C10L10/14C10L2270/026
Inventor 曹长海李澜鹏王宜迪程瑾李秀峥彭绍忠
Owner CHINA PETROLEUM & CHEM CORP