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Method for synthesizing polyethylene glycol (PEG) oleate

A technology of polyethylene glycol oleate and polyethylene glycol, which is applied to the preparation of carboxylic acid esters, chemical instruments and methods, and the preparation of organic compounds, and can solve the problems of long reaction time, expensive lipase catalyst, and production It can improve the efficiency and yield of esterification, improve the performance of wetting and solubilization, and achieve high quality.

Active Publication Date: 2013-04-24
ZHEJIANG HUANGMA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using lipase as a catalyst, put oleic acid, PEG400 and immobilized lipase into the Erlenmeyer flask, shake and react at 40°C for a certain period of time to obtain the product. This process is environmentally friendly and the reaction is mild, but the conditions are strictly controlled and the reaction time is too long. , the yield is low, and the lipase catalyst is expensive, so further research is needed for industrial application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Add 400g of PEG400, 310.2g of oleic acid, and 2.2g of DBSA to a 1000ml reaction kettle in sequence, vacuumize, start stirring, then slowly heat up to 100-115°C, vacuum degree ≥ -0.098MPa, and react under this temperature and vacuum conditions, The water generated by the reaction was distilled off, and no water was distilled out after 2.0 hours of reaction. After cooling down to 60°C, it was neutralized with an appropriate amount of triethanolamine. After filtration, the product PE6400 oleic acid monoester was obtained. The esterification rate of oleic acid reached 99.1%.

Embodiment 2

[0019] Add 300g PEG400, 423g oleic acid, 2.9g DBSA in sequence to a 1000ml reactor, vacuumize, start stirring, then slowly heat up to 110-125°C, vacuum degree ≥ -0.098MPa, and react under this temperature and vacuum conditions, distillation The water generated by the reaction was distilled out after 3.0 hours of reaction. After the temperature was lowered to 60°C, it was neutralized with an appropriate amount of triethanolamine. After filtration, the product PEG400 oleic acid diester was obtained, and the esterification rate of oleic acid reached 98.5%.

Embodiment 3

[0021] Add 450g PEG600, 211.5g oleic acid, 3.3g DBSA in sequence to a 1000ml reactor, vacuumize, start stirring, then slowly heat up to 110-120°C, vacuum degree ≥ -0.098MPa, and react under this temperature and vacuum conditions, The water generated by the reaction was distilled off. After 3.5 hours of reaction, no water was distilled out. After cooling down to 60°C, neutralize with an appropriate amount of triethanolamine. After filtration, the product PEG600 oleic acid monoester was obtained. The esterification rate of oleic acid reached 98.6%.

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PUM

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Abstract

The invention discloses a method for synthesizing polyethylene glycol (PEG) oleate, comprising the following steps: making PEG and oleate which are used as raw materials carry out esterification reaction at 100-150 DEG C for 2-6h under the action of organic acid catalyst by controlling the vacuum degree at -0.098 Mpa or higher; after the PEG and the oleate finishing reaction, neutralizing the product of reaction with triethanolamine until the pH value of the product of reaction being 5-7; and filtering the product of reaction to obtain solution which is PEG oleate. The organic acid catalyst is dodecyl benzene sulfonic acid, and the addition amount of the organic acid catalyst is 0.3-1.0 percent of the total mass of the PEG and the oleate. The invention has the advantages that the source of the organic acid catalyst is wide, the price of the organic acid catalyst is low, the reaction condition is mild, the method for synthesizing the PEG oleate omits the washing process and the dewatering process, hardly pollutes the environment, is simple, is convenient to operate, ensures high conversion rate and overcomes the defects that the byproducts of reaction are more and have deep color and the PEG oleate has stable quality and outstanding emulsifying, wetting and solubilizing properties.

Description

technical field [0001] The invention relates to a synthesis method of polyethylene glycol oleate, which belongs to the technical field of synthesis of ester compounds in organic chemistry. Background technique [0002] Polyethylene glycol oleate is a multifunctional nonionic surfactant with high emulsifying, wetting and solubilizing properties, including monoester and diester. Because of its functional properties such as wide HLB value, high activity, high water resistance, low toxicity, low foaming, and strong detergency to minerals, it is used in a wide range of applications. It can be used as an antistatic agent, softener, leveling agent and smoothing agent in the textile industry; it can be used as a detergent for metal materials, fabrics, fibers, electronic devices, precision mechanical parts, etc. in the washing industry; it can be used as an enhancer in the cosmetics industry. It can be used as solvent, emulsifier, foaming agent and moisturizing agent; it can be used...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C69/58C07C67/08C08G65/48
Inventor 王伟松王新荣金一丰王胜利张伟钢刘志湘
Owner ZHEJIANG HUANGMA TECH