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High temperature resistant polyol ester basic oil and preparation method thereof

A technology of polyol ester and base oil, which is applied in the direction of base material, petroleum industry, lubricating composition, etc. It can solve the problems of differences in high temperature resistance, structure and performance, etc., and achieve the effect of excellent high temperature resistance

Active Publication Date: 2018-12-21
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these oils can meet the requirements of the current working conditions, with the rapid development of industry and the continuous updating of equipment, the increasingly severe working conditions pose new challenges to the high temperature performance of the oils.
Polyol esters synthesized by different technical routes not only have differences in structure and performance, but also have large differences in high temperature resistance.

Method used

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  • High temperature resistant polyol ester basic oil and preparation method thereof
  • High temperature resistant polyol ester basic oil and preparation method thereof

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preparation example Construction

[0027] The present invention also provides a method for preparing the high-temperature-resistant polyol ester base oil described in the technical solution, comprising the following steps:

[0028] a) In the presence of an esterification catalyst, the polyhydric alcohol and the mixed fatty acid are mixed and reacted to obtain a high temperature resistant polyol ester base oil.

[0029] In the preparation method provided by the invention, firstly, the polyhydric alcohol and the mixed fatty acid are mixed and reacted in the presence of an esterification catalyst. Wherein, the specific types and dosage ratios of the polyols and mixed fatty acids have been introduced above, and will not be repeated here. In the present invention, the esterification catalyst includes but not limited to sulfur catalyst, metal catalyst or solid acid catalyst; the sulfur catalyst is preferably sodium bisulfate; the metal catalyst is preferably tin catalyst, more preferably tin chloride. In the presen...

Embodiment 1

[0034] Feed tripentaerythritol and dipentaerythritol in a molar ratio of 1:1, determine the amount of fatty acid added according to the total number of hydroxyl moles, the excess of fatty acid is 30%, and select n-heptanoic acid, n-octanoic acid and isononanoic acid to feed in a mass ratio of 2:1:17 , add 0.5wt% activated carbon loaded with sodium bisulfate (the mass ratio of activated carbon to sodium bisulfate is 5:1), raise the temperature of the above-mentioned mixed system to 200-220° C. in 6 hours, and keep the temperature for 4 hours. After the reaction is finished, the crude ester is obtained, and the acid value and hydroxyl value of the crude ester are analyzed.

[0035] Alkali washing and water washing are used in the post-treatment stage of crude ester. The amount of lye added is determined according to the acid value of the crude ester. The concentration of lye is generally 20-40wt%. 0.1-1.5wt% activated carbon, until no water drops obviously flow out, then vacuum ...

Embodiment 2

[0037] Feed tripentaerythritol as 100%, determine the amount of fatty acid added according to the total number of moles of hydroxyl groups, the excess of fatty acid is 30%, and the fatty acid is selected from n-heptanoic acid, n-octanoic acid, isononanoic acid and n-nonanoic acid in a mass ratio of 3:5:8:4. , add 0.6wt% activated carbon loaded with tin chloride (the mass ratio of activated carbon to tin chloride is 5:1), raise the temperature of the above mixed system to 210-230° C. for 9 hours, and keep the temperature for 3 hours. After the reaction is finished, the crude ester is obtained, and the acid value and hydroxyl value of the crude ester are analyzed.

[0038] Alkali washing and water washing are used in the post-treatment stage of crude ester. The amount of lye added is determined according to the acid value of the crude ester. The concentration of lye is generally 20-40wt%. 0.1-1.5wt% of neutral alumina, until no water drops obviously flow out, and then vacuum fil...

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Abstract

The invention belongs to the field of petrochemical engineering and in particular relates to high temperature resistant polyol ester basic oil and a preparation method thereof. The polyol ester basicoil provided by the invention is prepared from polyhydric alcohols and mixed fatty acids through an esterification reaction, wherein the polyhydric alcohols comprise one or more of monopentaerythritol, bipentaerythritol and tripentaerythritol; the mixed fatty acids comprise n-heptanoic acid, isononanoic acid as well as one or more of n-caprylic acid, nonanoic acid and n-decanoic acid. Due to optimal selection on raw materials for preparing the polyol ester basic oil, the polyol ester basic oil which is excellent in high temperature resistance and capable of meeting basic physical and chemicalproperty index requirements. High temperature resistance evaluation experiments show that a product made of the polyol ester basic oil through blending has high temperature resistance up to 240 DEG C,is not caked when being retained for 24 hours at 230 DEG C, and has volatility less than 20%.

Description

technical field [0001] The invention belongs to the field of petrochemical industry, and in particular relates to a high-temperature-resistant polyol ester base oil and a preparation method thereof. Background technique [0002] During the storage and use of lubricating oil, chemical reactions such as decomposition and oxidation will inevitably occur due to contact with oxygen under the catalysis of light, heat and metal, resulting in deterioration of the oil and shortening its service life; the acid produced after oxidation , sludge and deposits will corrode worn parts and cause malfunctions. In addition to adding functional additives to inhibit oil oxidation and passivate metal catalysis, the high temperature resistance of the base oil itself is also crucial. [0003] As a kind of ester lubricating oil base oil, polyol ester is mainly used for blending high-temperature aircraft engine oil, high-temperature chain oil, etc. Although these oils can meet the requirements of ...

Claims

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Application Information

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IPC IPC(8): C10M105/38C10M177/00C10N30/08
CPCC10M105/38C10M177/00C10M2207/2835C10N2030/08C10N2020/02
Inventor 康涛马楷梅莉刘月皞
Owner CHINA PETROLEUM & CHEM CORP
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