A kind of low sulfur diesel oil antiwear agent and preparation method thereof

A low-sulfur diesel and anti-wear agent technology, applied in the field of oil additives, can solve problems such as diesel engine corrosion, achieve the effects of increasing entanglement density, reducing product freezing point, and low blending ratio

Active Publication Date: 2020-12-08
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 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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  • A kind of low sulfur diesel oil antiwear agent and preparation method thereof
  • A kind of low sulfur diesel oil antiwear agent and preparation method thereof
  • A kind of low sulfur diesel oil antiwear agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Put 308g of methyl 4-pentenoate and 0.308g of hydroquinone into the reaction kettle, start stirring, and raise the temperature to 165°C for stirring and mixing at a stirring speed of 300rpm. Gradually add 500g of tungoleic acid (commercial tungoleic acid, Anhui Ruifengde Oil Deep Processing Co., Ltd., model: T160) dropwise into the reaction kettle, so that the addition of tungoleic acid is completed within 2 hours, and the dropping rate is basically uniform. After the addition, continue at 220°C After reacting for 4 hours, the reaction was completed. After removing unreacted methyl 4-pentenoate and oleic acid under reduced pressure at 210°C for 2 hours at a pressure of 65 Pa, the anti-wear agent A and the conversion rate of the carbon-carbon conjugated double bond of oleic acid were obtained. was 86.8%. After testing, the acid value of the product is 123.5mgKOH / g, and the freezing point is -25.3°C.

[0034] Depend on figure 1 It can be seen from the molecular structur...

Embodiment 2

[0038] Put 165g of methyl 4-pentenoate and 0.2g of hydroquinone into the reaction kettle, start stirring, and raise the temperature to 150°C for stirring and mixing at a stirring speed of 300rpm. Gradually add 500g of tungoleic acid (commercial tungoleic acid, Anhui Ruifengde Oil Deep Processing Co., Ltd., model: T160) dropwise into the reaction kettle, so that the addition of tungoleic acid is completed within 2 hours, and the dropping rate is basically uniform. After the addition, continue at 220°C After reacting for 4 hours, the reaction was completed. After removing the unreacted methyl 4-pentenoate and oleic acid by distillation under reduced pressure at 210°C for 2 hours at a pressure of 65 Pa, the anti-wear agent B and the conversion rate of the carbon-carbon conjugated double bond of oleic acid were obtained. was 59.3%. After testing, the acid value of the product is 75.6mgKOH / g, and the freezing point is -20.4°C.

Embodiment 3

[0040] Put 513g of methyl 4-pentenoate and 0.5g of hydroquinone into the reaction kettle, start stirring, and raise the temperature to 180°C for stirring and mixing at a stirring speed of 300rpm. Gradually add 500g of tungoleic acid (commercial tungoleic acid, Anhui Ruifengde Oil Deep Processing Co., Ltd., model: T160) dropwise into the reaction kettle, so that the addition of tungoleic acid is completed within 2 hours, and the dropping rate is basically uniform. After the addition, continue at 220°C After reacting for 4 hours, the reaction was completed, and the unreacted 4-pentenoic acid methyl ester and oleic acid were distilled under reduced pressure at 210°C for 2 hours to obtain anti-wear agent C and the conversion rate of the carbon-carbon conjugated double bond of oleic acid was 71.9%. After testing, the acid value of the product is 90.8mgKOH / g, and the freezing point is -21.6°C.

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Abstract

The invention relates to a low-sulfur diesel antiwear agent and a preparation method thereof. The low-sulfur diesel antiwear agent is prepared by: mixing an unsaturated carboxylate and a polymerization inhibitor at 150-180 DEG C, adding eleostearic acid step by step, allowing further reaction at 200-240 DEGC for a certain time, and distilling under reduced pressure. The low-sulfur diesel antiwearagent is prepared via the preparation method. The prepared low-sulfur diesel antiwear agent can provide improved lubrication for low-sulfur diesel, has low condensation point, has a low blending ratiowith low-sulfur diesel, and enables the low-sulfur diesel to satisfy national V lubrication standard and condensation point requirements after blending.

Description

technical field [0001] The invention belongs to the field of oil additives, and in particular relates to a low-sulfur diesel antiwear agent and a preparation method thereof. Background technique [0002] With the implementation of my country's diesel national IV and national V standards, the sulfur content of diesel will drop below 10ppm, and the polar components will be greatly reduced, resulting in poor lubricity of the oil. Therefore, improving the lubricity of low-sulfur diesel is one of the key issues to solve the large-scale promotion of low-sulfur diesel. [0003] In the prior art, antiwear agents are usually added to low-sulfur diesel oil, which can be adsorbed on the metal surface to form a protective film on the metal surface, reduce friction between metals, and effectively improve the lubricity of low-sulfur diesel oil. The antiwear agents currently on the market mainly include unsaturated fatty acids and their derivatives of unsaturated fatty acid esters and ami...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C10L1/188C10L10/08
CPCC10L1/1881C10L10/08
Inventor程瑾李澜鹏曹长海李秀峥王宜迪王领民乔凯
OwnerCHINA PETROLEUM & CHEM CORP