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A low-acid low-sulfur diesel lubricity improver and preparation method thereof

A low-sulfur diesel oil and lubricity technology, which is applied in the field of low-acid low-sulfur diesel oil lubricity improver and its preparation field, can solve the problems of increasing the risk of clogging the filter screen of an engine oil supply pump, losing the fluidity of diesel oil, increasing the viscosity of diesel oil, and the like, Achieve the effect of broadening the source of raw materials, easy industrial production, and 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 low-acid low-sulfur diesel lubricity improver and preparation method thereof
  • A low-acid low-sulfur diesel lubricity improver and preparation method thereof
  • A low-acid low-sulfur diesel lubricity improver and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Put 153g of 3-butenamide and 0.25g 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 speed is basically uniform. Continue to react for 4h, end the reaction, distill 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 double bond of oleic acid) was 86.1%. After testing, the acid value of the product is 128.7mgKOH / g, and the freezing point is -22.6°C. Depend on figure 1 and figure 2 It can be seen that a new characteristic peak of the compound appeared at the outflow time of 12.63 minutes, which prov...

Embodiment 2

[0032] Put 76g of 3-butenamide and 0.15g 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 500 g of tungoleic acid dropwise in the reaction kettle, so that the addition of tungoleic acid is completed within 2 hours, and the rate of addition is basically uniform. After the addition, continue to react at 200° C. for 5 hours, finish the reaction, and distill under reduced pressure at 65 Pa at 200° C. for 2 hours. Get improver products. The reaction molecular conversion rate is 80.4%, the acid value of the product is 129.4mgKOH / g, and the freezing point is -21.8°C.

Embodiment 3

[0034] Put 459g of 3-butenamide 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. Add 500 g of tungoleic acid gradually in the reactor, so that the addition of tungoleic acid is completed within 2 hours, and the rate of addition is basically uniform. After the addition, continue to react for 3 hours at 240° C., end the reaction, and distill under reduced pressure at 65 Pa at a pressure of 200° C. for 2 hours. Get improver products. The reaction molecular conversion rate is 83.2%, the acid value of the product is 129.5mgKOH / g, and the freezing point is -22.2°C.

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Abstract

The invention relates to a low-acid low-sulfur diesel lubricity improver and a preparation method thereof. The unsaturated monoamide and a polymerization inhibitor are mixed at 150-180°C, and tung oil acid is gradually added, and the mixture is cooled at 200-240°C after the addition is completed. Continue to react for a certain period of time, and obtain the improver product through vacuum distillation. The present invention uses unsaturated monobasic amide and tungoleic acid as raw materials to prepare a low-acid lubricity improver. The prepared improver has good lubricity, low freezing point, low acid value, less dosage and detergent effect, and can be used after reconciliation. Make low-sulfur diesel 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-acid low-sulfur diesel lubricity improver and a preparation method thereof. Background technique [0002] With the implementation of my country's diesel national V and national VI 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] Adding vegetable oleic acid to low-sulfur diesel oil can better solve the lubricity problem of diesel oil, but usually, vegetable oleic acid mostly contains a certain amount of saturated fatty acids with a high freezing point (as shown in Table 1), and the existing separation methods are used to , such as frozen pressing, distillation and refining, etc., are difficult to comple...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L1/224C10L1/188C10L1/04C10L10/08C10L10/14C10L10/04
CPCC10L1/04C10L1/14C10L1/1881C10L1/224C10L10/04C10L10/08C10L10/14C10L2270/026
Inventor 李秀峥李澜鹏曹长海王宜迪程瑾
Owner CHINA PETROLEUM & CHEM CORP