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A low-sulfur diesel lubricity improver and its synthesis method

A low-sulfur diesel oil and improver 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 fluidity of diesel oil, high acid value and freezing point, etc. To achieve the effect of broadening the source of raw materials, dense lubricating film, and no discharge of three wastes

Active Publication Date: 2021-03-02
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 freezing point, so it is not suitable for cold regions

Method used

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  • A low-sulfur diesel lubricity improver and its synthesis method
  • A low-sulfur diesel lubricity improver and its synthesis method
  • A low-sulfur diesel lubricity improver and its synthesis method

Examples

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Effect test

Embodiment 1

[0032] Add 129g of 3-n-butenol into the autoclave, feed carbon dioxide into the autoclave to make the carbon dioxide supercritical, control the pressure to 8.0MPa, the temperature to 45°C, and start stirring. Gradually add 500 g of tungoleic acid (Anhui Ruifengde Oil Deep Processing Co., Ltd., model: T160) into the reaction kettle, and the dropping rate is basically uniform, so that the addition of tungoleic acid is completed within 2 hours. After the addition, continue to react for 4 hours to end the reaction. The reaction system is passed into the expansion separator, the pressure is reduced to normal pressure, and the phase state of supercritical carbon dioxide is transformed into ordinary gaseous carbon dioxide, which is collected and reused after being discharged. The residue was distilled under reduced pressure at 65Pa and 200°C for 2h to obtain the improver product. After calculation, the conversion rate of reaction molecules (conversion rate of carbon-carbon conjugated...

Embodiment 2

[0034] 86g of 3-butenol was added into the autoclave, and carbon dioxide was introduced into the autoclave to make the carbon dioxide in a supercritical state. The pressure was controlled at 8.5MPa, the temperature was 60°C, and the stirring was started. Gradually add 500 g of tungoleic acid to the reaction kettle, the rate of addition is substantially uniform, so that the addition of tungoleic acid is completed within 1 hour, and the reaction is continued for 3 hours to end the reaction. The reaction system is passed into the expansion separator, the pressure is reduced to normal pressure, and the phase state of supercritical carbon dioxide is transformed into ordinary gaseous carbon dioxide, which is collected and reused after being discharged. The residue was distilled under reduced pressure at 65Pa and 200°C for 2h to obtain the improver product. The reaction molecular conversion rate is 78.4%, the acid value of the product is 123.8mgKOH / g, and the freezing point is -21.9°...

Embodiment 3

[0036] Add 259g of 3-n-butenol into the autoclave, feed carbon dioxide into the autoclave to make the carbon dioxide supercritical, control the pressure to 7.5MPa, the temperature to 32°C, and start stirring. Gradually add 500 g of tungoleic acid to the reaction kettle, the rate of addition is basically uniform, so that the addition of tungoleic acid is completed within 3 hours, and the reaction is continued for 5 hours to end the reaction. The reaction system is passed into the expansion separator, the pressure is reduced to normal pressure, and the phase state of supercritical carbon dioxide is transformed into ordinary gaseous carbon dioxide, which is collected and reused after being discharged. The residue was distilled under reduced pressure at 65Pa and 200°C for 2h to obtain the improver product. The reaction molecular conversion rate is 79.2%, the acid value of the product is 120.5mgKOH / g, and the freezing point is -23.8°C.

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Abstract

The invention relates to a low-sulfur diesel oil lubricity improver and a synthesis method thereof. Unsaturated monohydric alcohol is added into a high-pressure reactor, and then carbon dioxide is introduced into the high-pressure reactor to make the carbon dioxide in a supercritical state; the stirring is started, Gradually add oleic acid, and continue to react for a period of time after the addition; after the reaction, the residue is distilled under reduced pressure to obtain the improver product. In the present invention, under supercritical conditions, the lubricity improver is prepared by using unsaturated monohydric alcohol and tungoleic acid as raw materials. The prepared improver has good lubricity, low freezing point, low acid value, and less dosage. After blending, it can make low-sulfur diesel oil Meet the national V lubricity standards and freezing point requirements.

Description

technical field [0001] The invention belongs to the technical field of diesel oil additives, and in particular relates to a low-sulfur diesel lubricity improver 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 hydrotreating and hydrocracking are...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L1/182C10L1/188C10L1/04C10L10/08C10L10/14C10L10/04
CPCC10L1/04C10L1/18C10L1/1824C10L1/1881C10L10/04C10L10/08C10L10/14C10L2270/026
Inventor 程瑾李澜鹏曹长海王宜迪李秀峥
Owner CHINA PETROLEUM & CHEM CORP