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Improver for improving lubricity of low sulfur diesel oil and preparation method thereof

A low-sulfur diesel and improver technology, applied in the field of oil additives, can solve problems such as diesel engine corrosion, and achieve the effects of increasing the entanglement density, reducing the internal binding effect, and improving the lubricating effect.

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 oil lubricity improvers are all at the end of the molecular chain, such as long-chain fatty acids, etc., and the entanglement of its non-polar long chain belongs to unilateral entanglement, which requires relatively large polarity and acidity. 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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  • Improver for improving lubricity of low sulfur diesel oil and preparation method thereof
  • Improver for improving lubricity of low sulfur diesel oil and preparation method thereof
  • Improver for improving lubricity of low sulfur diesel oil and preparation method thereof

Examples

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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] Put 270g of dimethyl glutaconate and 0.25g of hydroquinone into the reaction kettle, start stirring, and raise the temperature to 165°C for mixing. Gradually add 500 g of tung oil methyl ester biodiesel dropwise to the reaction kettle, so that the dropwise addition of tung oil methyl ester biodiesel is completed within 2 hours, and the rate of addition is basically uniform. After removing the unreacted dimethyl glutaconate and tung oil methyl ester under reduced pressure at ℃ for 2 h, the improver product A was obtained, and the reaction m...

Embodiment 2

[0037] The preparation process and operating conditions were the same as in Example 1, except that the addition of tung oil methyl ester biodiesel was completed dropwise within 1 hour, and the reaction was continued at 240°C for 3 hours after the drop was completed to obtain improver product B, with a reaction molecular conversion rate of 80.4%. After testing, the acid value of the product is 1.6mgKOH / g, the freezing point is -25.2°C, and the water layer is not turbid in the demulsibility test.

Embodiment 3

[0039] The preparation process and operating conditions were the same as in Example 1, except that the addition of tung oil methyl ester biodiesel was completed dropwise within 3 hours, and the reaction was continued at 200°C for 5 hours after the drop was completed to obtain improver product C with a reaction molecular conversion rate of 81.5%. The acid value of the product is 1.4mgKOH / g, the freezing point is -28.8°C, and the water layer is not turbid in the demulsibility test.

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Abstract

The invention relates to an improver for improving lubricity of low sulfur diesel oil and a preparation method thereof. According to the method, unsaturated dicarboxylic acid ester and a polymerization inhibitor are mixed together at 150-180 DEG C, tung oil biodiesel is gradually added, after the addition, a reaction continues producing at 200-240 DEG C for a certain period of time, and after thereaction, an improver product is obtained by distillation under reduced pressure. The improver prepared by the preparation method of the invention can improve the lubricity of the low sulfur diesel oil, and the improver product is low in condensation point and acid value, and is low in blending ratio with the low sulfur diesel, and can make the low sulfur diesel meet national V lubricity standardsand condensation point requirements after blending.

Description

technical field [0001] The invention belongs to the field of oil additives, and in particular relates to an improver for improving the lubricity of low-sulfur diesel oil and a preparation 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 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 hydrotr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/19C10L1/16C10L1/182C10L10/08
CPCC10L1/14C10L1/1616C10L1/1826C10L1/1905C10L10/08
Inventor 李秀峥李澜鹏曹长海王宜迪雒亚东
Owner CHINA PETROLEUM & CHEM CORP
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