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A method for preparing fatty acid ester antiwear agent using solid superacid catalyst for esterification of acid type antiwear agent

A solid super acid, fatty acid ester technology, applied in the preparation of carboxylate, the preparation of organic compounds, catalysts for physical/chemical processes, etc., can solve the problems of complex impurities, environmental pollution, dark color and other problems, and achieve low production costs , The effect of more recycling and high catalyst activity

Active Publication Date: 2017-12-29
JIANGXI SILINCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fatty acid ester antiwear agent produced by the invention has low temperature fluidity, good lubricity, etc., and solves the problems of complex impurities, low purity, dark color, and environmental pollution caused by the use of liquid acids in traditional production. Low, high esterification rate, high product yield, simple post-treatment, environmentally friendly and efficient production method

Method used

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  • A method for preparing fatty acid ester antiwear agent using solid superacid catalyst for esterification of acid type antiwear agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A preparation method for a solid superacid catalyst for acid type antiwear agent esterification, the steps comprising:

[0026] (1) In a 500L container, put 9.5kg of titanium tetrachloride in the kettle, add 300kg of distilled water to dilute, and then add 10kg of calcined and pulverized alumina to fully impregnate it, wherein the molar ratio of Ti / Al is 0.5 :1;

[0027] (2) Add dropwise the dilute ammonia water precipitant with a mass concentration of 12 (wt)%, adjust the pH value at 8-9, fully stir and hydrolyze until the precipitation no longer increases;

[0028] (3) aging the precipitate together with the mother liquor at 0°C for 48 hours;

[0029](4) Filter after aging, and wash the precipitated AgNO with deionized water to 0.1mol / L 3 Titration detection until there is no chloride ion or no more than 200us / cm by conductivity measurement; dry the precipitate at 100°C for 6 hours, grind the dried precipitate into powder and sieve it through a 100-mesh sieve;

[0...

Embodiment 2

[0033] Catalyst prepared by embodiment 1 catalyzes the method for preparing fatty acid ester antiwear agent, and its steps comprise:

[0034] (1) Place commercially available 140kg unsaturated fatty acid and 140kg glycerin molar ratio 1:3 in the reaction kettle, add 0.28kg and account for 0.1(wt)% SO of the total mass of reactant 4 2- / TiO 2 -Al 2 o 3 / La 3+ Solid superacid catalyst, stir to mix evenly, heat to 150-180°C, mix and evacuate, depressurize to 3kPa, control the cooling water temperature in the reflux condenser, so that the water produced by esterification is vacuumed away, and the glycerin is condensed and refluxed ;

[0035] (2) After the end of the transesterification reaction, let stand or centrifuge to separate SO 4 2- / TiO 2 -Al 2 o 3 / La 3+ Solid superacid catalyst, SO 4 2- / TiO 2 -Al 2 o 3 / La 3+ The solid superacid catalyst is washed and dried for reuse next time;

[0036] (3) Add saturated sodium bicarbonate or a concentration of 2-5 (wt)...

Embodiment 3

[0040] Catalyst prepared by embodiment 1 catalyzes the method for preparing fatty acid ester antiwear agent, and its steps comprise:

[0041] (1) Place commercially available 140kg unsaturated fatty acid and 90kg glycerin molar ratio 1:2 in the reactor, add 4.6kg and account for 2(wt)% SO of the total mass of the reactant 4 2- / TiO 2 -Al 2 o 3 / La 3+ Solid super acid catalyst, stir to mix evenly, heat to 160-180°C, mix and evacuate, depressurize to 3kPa, control the cooling water temperature in the reflux condenser, so that the water produced by esterification is vacuumed away, and the glycerin is condensed and refluxed ;

[0042] (2) After the end of the transesterification reaction, let stand or centrifuge to separate SO 4 2- / TiO 2 -Al 2 o 3 / La 3+ Solid superacid catalyst, SO 4 2- / TiO 2 -Al 2 o 3 / La 3+ The solid superacid catalyst is washed and dried for reuse next time;

[0043] (3) Add saturated sodium bicarbonate or a concentration of 2-5 (wt)% sodi...

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Abstract

The invention discloses a preparation method of a solid superacid catalyst used for the esterification of an acid type antiwear agent. The invention also provides a method for preparing the fatty acid ester antiwear agent catalyzed by the catalyst. The present invention provides a high specific surface area to the classic solid acid through simple, low-temperature aging operation and rare earth modification with the addition of a small amount of rare earth salt, which is beneficial to the increase of the acid sites of the catalyst, and the catalyst can be increased by selecting cheap oxides and modified as the active carrier. Reusable times and easy to separate from the product. These technical solutions can achieve low production cost, high catalyst activity, easy separation from the system after reaction, and many recyclable uses. It is a feasible method for esterification of fatty acids that can be applied to large-scale production. The acid-type anti-wear agent is used as a raw material. , the yield of fatty acid monoester antiwear agent prepared by catalyzing esterification can reach 72%, and the product purity after post-treatment is more than 95%, which is of positive significance for the development of seeking solid acid catalysts for ester type antiwear agents.

Description

technical field [0001] The invention belongs to the technical field of fatty acid esterification catalysts, and in particular relates to a solid superacid catalyst for esterification of acid-type antiwear agents. The invention also relates to a preparation method of the catalyst. Background technique [0002] As countries all over the world pay more and more attention to environmental protection, in order to reduce the emission pollution of diesel vehicles, the production of high-quality clean diesel has become the development direction of the modern oil refining industry. This kind of diesel generally has the characteristics of low sulfur content, low aromatics content, high cetane number, and light distillate. Due to the harsh hydrodesulfurization process commonly used in the production of low-sulfur diesel oil, the content of polar oxygen-containing and nitrogen-containing compounds and polycyclic and bicyclic aromatic hydrocarbons in diesel oil is also reduced, thereby ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/053C07C67/08C07C69/003C10L10/08C10L1/19
CPCY02P20/584
Inventor 廖维林雷志伟范乃立熊云奎钟前芮培欣夏剑辉谢贤清
Owner JIANGXI SILINCO
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