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Preparation method of low-cloud-point fatty acid type diesel antiwear additive

A technology of fatty acid and antiwear agent, which is applied in the field of preparation of low cloud point fatty acid type diesel oil antiwear agent, and can solve problems such as difficult separation, difficult separation, easy turbidity of filtrate, etc.

Active Publication Date: 2017-01-25
CNOOC TIANJIN CHEM RES & DESIGN INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When separated under a large pressure difference, the network structure is gradually destroyed and dispersed into very fine crystal particles, which are easy to block the filter medium and cause separation difficulties
At present, the main method for separating saturated fatty acids in industry is pressing method. When pressing, the pressure needs to be increased slowly and gradually to ensure that the filter medium is within the allowable range, and at the same time overcome the resistance caused by the fine crystal particles blocking the pores of the medium; Mechanical deformation can not form a stable fixed bed, resulting in the formation of fine crystalline particles through filtration, the filtrate is easily turbid, and it is difficult to separate completely
When the fatty acid produced by this traditional process is used to make diesel antiwear agent, it will cause the diesel antiwear agent to easily precipitate and crystallize at low temperature and become turbid, and the cloud point is generally around -5°C

Method used

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  • Preparation method of low-cloud-point fatty acid type diesel antiwear additive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Put 1000 grams of commercially available industrial oleic acid (condensation point 4°C, saturated fatty acid content 5.0%) and 0.5 grams of polyalphaolefin (molecular weight is 70,000) into a 2-liter reactor with a jacket, stir and mix while passing Jacket cooling, stop stirring when the material reaches -8°C, start stirring after 4 hours, release the material and filter to separate the crystals, the crystals are loose and fluid. Add 50 grams of mineral spirits with a flash point of 60° C. and 0.5 gram of polymethacrylate (T602) into the obtained filtrate, and mix uniformly to obtain product A.

Embodiment 2

[0020] Put 1000 grams of commercially available industrial oleic acid (condensation point 4°C, saturated fatty acid content 5.0%) and 0.1 gram polyalphaolefin (molecular weight: 100,000) into a 2-liter reactor with a jacket, stir and mix while passing Jacket cooling, stop stirring when the material reaches -5°C, start stirring after standing for 6 hours, release the material and filter to separate the crystals, the crystals are loose and fluid. Add 50 grams of mineral spirits with a flash point of 60° C. and 0.1 gram of polymethacrylate (T602) to the obtained filtrate, and mix uniformly to obtain product B.

Embodiment 3

[0022] Put 1000 grams of commercially available industrial oleic acid (condensation point 4°C, saturated fatty acid content 5.0%) and 0.1 gram polyalphaolefin (molecular weight: 100,000) into a 2L reactor with a jacket, stir and mix while passing through the jacket Cool in a jacket, stop stirring when the material reaches -10°C, start stirring after standing for 4 hours, release the material and filter to separate the crystals, the crystals are loose and fluid. Add 50 grams of mineral spirits with a flash point of 60° C. and 1.0 gram of polymethacrylate (T602) into the obtained filtrate, and mix well to obtain product C.

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Abstract

The invention belongs to the field of petrochemical industry, and relates to a preparation method of a low-cloud-point fatty acid type diesel antiwear additive. The method comprises the following steps: adding polyalpha-olefin into industrial unsaturated fatty acid, uniformly stirring, refrigerating to separate out crystals, filtering, and separating to remove the crystals so as to obtain a low-cloud-point fatty acid filtrate in which crystals are not separated out at a low temperature, wherein the polyalpha-olefin accounts for 0.1-1.0% of the industrial unsaturated fatty acid in percentage by mass; and adding a right amount of solvent oil and pour point depressant into the filtrate to obtain the low-cloud-point fatty acid type diesel antiwear additive. According to the method provided by the invention, the saturated fatty acid crystals can be easily separated out from the fatty acid solution, so that the saturated fatty acid content in the fatty acid is greatly reduced, and the diesel antiwear additive in which saturated fatty acid crystals can not be easily separated out at a low temperature is prepared from the fatty acid used as a raw material; and the cloud point reaches -15 DEG C or below.

Description

technical field [0001] The invention belongs to the field of petrochemical industry and relates to a preparation method of a low cloud point fatty acid type diesel oil antiwear agent. Background technique [0002] Fatty acid type diesel antiwear agent can significantly improve the lubricity of low-sulfur diesel and has low production cost, so it has quickly become the main variety for improving the lubricity of low-sulfur diesel. For most diesel oils, fatty acid diesel antiwear agents have been able to meet the requirements of their main indicators, and their low-cost competitive advantage is obvious. [0003] Most of our country uses unsaturated fatty acids such as cheap and easy-to-obtain industrial grade linoleic acid, oleic acid, linolenic acid as the main raw materials for the production of fatty acid antiwear agents, and the saturated fatty acid content and freezing point are relatively high. Because the production of industrial-grade unsaturated fatty acids can use d...

Claims

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Application Information

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IPC IPC(8): C11B7/00C10L1/18C10L10/08
CPCC10L1/1802C10L10/08C11B7/00
Inventor 董广前黄占凯张艳芳张晓行张春丽赵洪李庚王松
Owner CNOOC TIANJIN CHEM RES & DESIGN INST
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