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Preparation method of saturated straight-chain fatty acid butyl ester

A technology for fatty acid butyl esters and straight-chain fatty acids, which is applied in the field of preparation of saturated straight-chain fatty acid butyl esters, can solve the problems of low product purity, no consideration of fatty acid removal and reduction, and high acid value of products, so as to achieve high purity and reduce subsequent Purification process, effect of improving purity

Pending Publication Date: 2022-06-07
NANJING KERUN LUBRICANTS +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN 101914015B discloses the use of concentrated sulfuric acid to catalyze the esterification of stearic acid and n-butanol. In the washing step, water is used for washing, and no further removal and reduction of fatty acids is considered, resulting in excessively high acid value and low product purity.

Method used

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  • Preparation method of saturated straight-chain fatty acid butyl ester

Examples

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Embodiment 1

[0017] The preparation method of saturated straight chain fatty acid butyl ester of the present invention, comprises the steps:

[0018] (1) in a 200 liter reactor with stirring, heating, temperature control and water circulation condenser and oil-water separator, drop into eicosanoic acid 312kg, n-butanol 150kg and sulfamic acid 3.12kg successively; Heating under stirring To the boiling of the reaction solution, keep the boiling reflux state, and continuously separate the water from the oil-water separator, until no water is generated, stop heating, and the esterification reaction ends;

[0019] (2) reaction kettle temperature is controlled at 95 ℃, in reaction kettle, adding 300kg mass concentration is the sodium carbonate aqueous solution of 5%, stirring 10min, leaving standstill layering, the water layer is drained, obtains the mixed solution after washing;

[0020] (3) add 300kg pure water to the mixed solution after washing, stir for 10min, stand for stratification, and ...

Embodiment 2

[0023] The preparation method of saturated straight chain fatty acid butyl ester of the present invention, comprises the steps:

[0024] (1) in a 200-liter reactor with stirring, heating, temperature control and water circulation condenser and oil-water separator, drop into tetracosanoic acid 368g, n-butanol 150kg and p-toluenesulfonic acid 3.68kg successively; Heating until the reaction liquid boils, keep the state of boiling and reflux, and continuously separate the water from the oil-water separator, until no water is generated, stop heating, and the esterification reaction ends;

[0025] (2) temperature is controlled at 95 ℃, adding 300kg mass concentration is the sodium carbonate aqueous solution of 5% in the reactor, stirring 10min, leaving standstill layering, the water layer is drained, obtains the mixed solution after washing;

[0026] (3) add 300kg pure water to the mixed solution after washing, stir for 10min, stand for stratification, and drain the water layer; rep...

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Abstract

The invention discloses a preparation method of saturated straight-chain fatty acid butyl ester, which comprises the following steps: (1) sequentially adding saturated straight-chain fatty acid and n-butyl alcohol into a reaction kettle, and adding a catalyst into the reaction materials while stirring; heating to boiling under stirring, keeping a boiling reflux state, continuously separating water from the oil-water separator, stopping heating until no water is generated, and terminating esterification reaction; (2) adding a sodium carbonate aqueous solution into the mixed solution after the esterification reaction to obtain a mixed solution, maintaining the temperature of the mixed solution at 80-95 DEG C, uniformly stirring, standing for layering, and removing a water layer to obtain a washed mixed solution; (3) adding pure water into the washed mixed solution, maintaining the temperature at 80-95 DEG C, uniformly stirring, standing for layering, and removing a water layer to obtain the washed mixed solution; repeating the washing operation in the step (3) until the mixed solution is neutral after washing; and (4) carrying out reduced pressure distillation on the washed mixed solution to obtain the target product saturated straight-chain fatty acid butyl ester.

Description

technical field [0001] The present invention relates to a preparation method of saturated straight-chain fatty acid butyl ester. Background technique [0002] Butyl stearate has been maturely used in metal processing, resin, cosmetics and other fields. CN 101914015B discloses that concentrated sulfuric acid is used to catalyze the esterification of stearic acid and n-butanol, and water is used for washing in the washing step, and further removal and reduction of fatty acids are not considered, thereby resulting in excessively high product acid value and low product purity. SUMMARY OF THE INVENTION [0003] Purpose of the invention: The purpose of the present invention is to provide a method for preparing saturated straight-chain fatty acid butyl ester with high product purity and reduced subsequent purification process. [0004] Technical scheme: the preparation method of saturated straight-chain fatty acid butyl ester of the present invention comprises the following step...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/08C07C67/60C07C67/54C07C69/24
CPCC07C67/08C07C67/60C07C67/54C07C69/24
Inventor 李晓栓郑威孙翠赵凯利余瀚森聂晓霖
Owner NANJING KERUN LUBRICANTS
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