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Method for synthesizing polyatomic alcohol fatty acid ester

A fatty acid ester and polyol technology, which is applied in the field of green synthetic polyol fatty acid ester, can solve the problems of easy decomposition of ionic liquid, large amount of ionic liquid, and limitation of feeding methods, and achieve low cost, easy operation, air and water stable effect

Inactive Publication Date: 2009-06-17
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ionic liquids are used as catalysts and solvents for the esterification reaction and have been reported. Patent CN1247856A reports the method of utilizing ionic liquids to catalyze esterification, but the metal or non-metallic halide ionic liquids used have poor stability and decompose when encountering water, and the feeding method is also limited. limit
[Hmim] BF is adopted in CN1405140A 4 Carry out esterification reaction as catalyst, but the ionic liquid containing F is easy to decompose when encountering water, emits HF (Richard P.Swatloski, Green Chemistry, 2003, 5:361), simultaneously in the implementation process, the consumption of ionic liquid is very large
The ionic liquid catalyzed esterification reaction reported by CN1554638A only relates to the reaction of acetic acid and n-butanol
The esterification reaction of polyols and fatty acids catalyzed by ionic liquids is only described in patent CN1935918A, but the purpose of this patent is to prepare an alkyd resin coating, and the reaction only uses glycerin, and does not involve other polyols

Method used

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  • Method for synthesizing polyatomic alcohol fatty acid ester
  • Method for synthesizing polyatomic alcohol fatty acid ester

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] In a 250mL three-necked flask, add stearic acid and ethylene glycol at a molar ratio of fatty acid to polyol of 1:1.2, and then add 1-methyl-3-butylimidazole trifluoromethanesulfonic acid with a total mass of 0.2%. salt ionic liquid. Stir and heat up to 175°C. After reacting for 1 hour, the material is discharged. The acid value is 5.8 mgKOH / g, and the esterification rate is 97.3%.

Embodiment 2

[0025] The same method and operation as in Example 1, 0.15% 1,3-dimethylimidazolium methylsulfate was used as the catalyst, the acid value was determined to be 14.1 mgKOH / g after the reaction, and the esterification rate was 92.2%.

Embodiment 3

[0027] In a 250mL three-necked flask, oleic acid and ethylene glycol were added according to the molar ratio of fatty acid to polyol at 1:1.1, and then 1-methyl-3-octylimidazolium bisulfate ionic liquid with a total mass of 0.2% was added. Stir and heat up to 120°C. After reacting for 2 hours, the material was discharged. The acid value was measured to be 8.4 mgKOH / g, and the esterification rate was 94.42%.

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Abstract

The invention discloses a method for synthesizing polyol fatty acid ester. The method comprises: fatty acid and polyol are used as reactants; functionalized ionic liquid is used as catalyst; under operational conditions of normal pressure, a reaction temperature of between 80 and 200 DEG C and reaction time of between 0.5 and 8 hours, the polyol fatty acid ester is synthesized. The method has the advantages of simple working procedure, mild reaction condition, high esterification rate, good stability of the catalyst and recyclability.

Description

technical field [0001] The invention relates to a method for green synthesizing polyol fatty acid ester, in particular to a method for obtaining polyol fatty acid ester through esterification reaction of polyol and fatty acid using functionalized ionic liquid as a catalyst. Background technique [0002] Polyol fatty acid ester has the characteristics of emulsification, antistatic, lubrication, etc., and has many advantages such as safety, nutrition, good processing adaptability, and high human compatibility. The industry has a wide range of applications. For example, ethylene glycol distearate is an important additive in the cosmetics industry, and can be used as a pearlescent agent, conditioning agent and thickener in shampoos, body washes and other washing products. Although ethylene glycol stearate has been widely used abroad as a pearlescent agent (Xu Peikai et al., Guangzhou Chemical Industry, 1988, 1:18), it is still in the stage of development and production in my co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/08B01J31/02
CPCY02P20/584
Inventor 李臻夏春谷陈静刘佳梅
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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