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Low-sulfur diesel oil lubricity improver as well as synthesis method and application thereof

A low-sulfur diesel and lubricity technology, used in the field of biodiesel, can solve the problems of high freezing point and unsatisfactory product performance, and achieve the effects of dense lubricating film, improved lubricity, and improved conversion rate.

Active Publication Date: 2020-06-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polyols are used as raw materials for transesterification to easily form a polyester structure, resulting in too high a freezing point of the product, and the performance of the product cannot meet the requirements.

Method used

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  • Low-sulfur diesel oil lubricity improver as well as synthesis method and application thereof
  • Low-sulfur diesel oil lubricity improver as well as synthesis method and application thereof
  • Low-sulfur diesel oil lubricity improver as well as synthesis method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Preparation of tung oil methyl ester: Add 800g tung oil, 160g methanol, and 8g potassium hydroxide into a 2L high-pressure reactor, and carry out stirring reaction. The reaction temperature is 60°C, and the reaction time is 20min. Glycerin product 76.2g, then the upper layer product was washed 3 times with 50°C hot water, and the washed product was distilled at 2000Pa and 60°C for 2h to obtain tung oil methyl ester biodiesel.

[0033] 4-pentenoic acid and tung oil methyl ester are sent into the premixing tank at a molar ratio of 1:1, and then sent into the microchannel reactor through a metering pump. The material of the microchannel reactor is stainless steel, and the structure is heart-shaped. The inner diameter of the vessel is 0.5mm, the controlled temperature is 130°C, and the reaction time is 1h. After the reaction, the product was distilled at 65 Pa and 200° C. for 2 hours to obtain a low-sulfur diesel lubricity improver product. After calculation, the reaction ...

Embodiment 2

[0035] Send 4-pentenoic acid and tung oil methyl ester into the premix tank at a molar ratio of 0.5:1, and then send them into the microchannel reactor through a metering pump. The microchannel reactor is made of stainless steel and has a heart-shaped structure. The inner diameter of the vessel is 0.5mm, the controlled temperature is 110°C, and the reaction time is 2h. After the reaction, the product was distilled at 65 Pa and 200° C. for 2 hours to obtain a low-sulfur diesel lubricity improver product. The molecular conversion rate of the reaction was 88.5%, the acid value of the product was 125.0 mgKOH / g, and the freezing point was -24.2°C.

Embodiment 3

[0037] 4-pentenoic acid and tung oil methyl ester are sent into the premixing tank at a molar ratio of 3:1, and then sent into the microchannel reactor through a metering pump. The microchannel reactor is made of stainless steel and has a heart-shaped structure. The inner diameter of the vessel is 0.5mm, the controlled temperature is 150°C, and the reaction time is 0.5h. After the reaction, the product was distilled at 65 Pa and 200° C. for 2 hours to obtain a low-sulfur diesel lubricity improver product. The reaction molecular conversion rate is 96.8%, the acid value of the product is 128.8mgKOH / g, and the freezing point is -25.8°C.

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Abstract

The invention relates to a synthesis method of a low-sulfur diesel oil lubricity improver, which comprises the following steps: proportionally feeding an unsaturated monocarboxylic acid and tung oil biodiesel into a premixing tank, feeding a mixed solution into a micro-channel reactor, reacting at 110-150 DEG C, and carrying out reduced pressure distillation after the reaction is completed, thereby obtaining the lubricity improver product. In a micro-channel reactor, tung oil biodiesel is modified with the unsaturated monocarboxylic acid, the prepared improver is used for improving the lubricity of low-sulfur diesel oil, has the advantages of good low-temperature fluidity, good lubricity, low blending ratio, low acid value and the like, and can enable the low-sulfur diesel oil to meet national V lubricity standards and condensation point requirements after blending.

Description

technical field [0001] The invention belongs to the technical field of biodiesel, and in particular relates to a low-sulfur diesel lubricity improver, a synthesis method and application 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 a...

Claims

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Application Information

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IPC IPC(8): C10L1/188C10L1/18C10L1/04C10L10/08C10L10/14C10L10/04
CPCC10L1/04C10L1/18C10L1/1802C10L1/188C10L10/04C10L10/08C10L10/14C10L2270/026
Inventor 李澜鹏曹长海王宜迪程瑾李秀峥
Owner CHINA PETROLEUM & CHEM CORP