Method for high-efficiency synthesis of ethylene glycol mono stearate

A technology of ethylene glycol fatty acid and ethylene glycol, which is applied in the preparation of carboxylic acid esters, chemical instruments and methods, and the preparation of organic compounds, and can solve problems such as adverse environmental effects, environmental pollution recovery costs, and long reaction times

Inactive Publication Date: 2012-01-11
SICHUAN LUTIANHUA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But above-mentioned synthetic technology also has weak point, and reaction time is too long, and the chromaticity of product is had influence to varying degrees; In addition, adopts organic solvents such as toluene, hexanaphthene to make water-carrying agent, has adverse influence to environment, has certain environmental pollution and recycling costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0121] Weigh 142g of stearic acid, 31.1g of ethylene glycol, and 1.4g of catalyst (purchased from Sichuan Lutianhua Group Co., Ltd., the same below) into the reactor; heat the reactor and keep it at 240°C for 60 minutes; when the test When the acid value of the sample is below 3mgKOH / g, the reaction can be stopped, filtered, and obtained. The average acid value of the product is 1.27 mgKOH / g, and the acid conversion rate of the product is 99.38%.

example 2

[0123] Weigh 284g of stearic acid, 68.2g of ethylene glycol, and 1.4g of catalyst into the reactor; heat the reactor and keep it at 220°C for 60 minutes; when the acid value of the sample is below 3mgKOH / g, stop Reaction, filtration, that is. The average acid value of the product is 1.18 mgKOH / g, and the acid conversion rate of the product is 99.42%.

example 3

[0125] Weigh 284g of stearic acid, 68.2g of ethylene glycol, and 1.4g of catalyst into the reactor; heat the reactor and keep it at 232°C for 30 minutes; when the acid value of the sample is below 3mgKOH / g, stop Reaction, filtration, that is. The average acid value of the product is 0.76 mgKOH / g, and the acid conversion rate of the product is 99.72%.

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PUM

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Abstract

The invention discloses a method for high-efficiency synthesis of ethylene glycol mono stearate, comprising the following steps: (1) weighing and adding quantitative aliphatic acid, glycol, catalyst in a reactor; (2) heating the reactor, setting the initial heating temperature of 190 DEG C, and keeping warm for reaction for a certain time at the temperature of more than 190 DEG C; and (3) when the acid value of the sample is below 3 mg KOH / g, stopping the reaction, and filtering. Ethylene glycol mono stearate can be efficiently synthetized with the method of the present invention at constant pressure without solvent for shorter time, and the acid value minimum can be reached below 1.0. The invention has the advantages of simple and high efficiency process, convenient and feasible operation, safety, and environmental protection, and has good application value.

Description

technical field [0001] The invention relates to a method for efficiently synthesizing ethylene glycol stearate. Background technique [0002] Ethylene glycol stearate is a kind of non-ionic surfactant, which is a rising star of surfactants that are being gradually commercialized. It not only has the characteristics of high surface activity, non-toxic, non-irritating, and safe to use, but also has Its low foaming and high emulsifying properties are often used as emulsifiers, dispersants, solubilizers, lubricants, softeners, defoamers, antistatic agents, pearlescent agents, etc. It is widely used in daily chemical industry, metal, fiber processing and production of various emulsion cosmetics, detergents and drugs. [0003] Most of the current domestic and foreign production processes use stearic acid or fatty acid and ethylene glycol as raw materials to produce ethylene glycol stearate with concentrated sulfuric acid catalytic esterification. The product color of this method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/08C07C69/28
Inventor 任春华宁忠培涂勇林朝阳蒋英邱力琴
Owner SICHUAN LUTIANHUA
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