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Catalytic synthesis of ethyl linoleate with ionic liquid microemulsion and preparation method thereof

A technology of ethyl linoleate and ionic liquid, which is applied in the field of catalyzed synthesis of ethyl linoleate and its preparation by using ionic liquid microemulsion, can solve the problems of unfavorable industrial production, etc., and achieve low equipment corrosion, strong catalytic activity, and process low cost effect

Active Publication Date: 2021-12-21
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are also relevant reports on microemulsions as reaction medium catalyzed esterification, but the microemulsions in the research are water-containing microemulsions, and this water-containing microemulsion catalyzed esterification reaction needs a long time (more than 24 hours) low temperature (30~60 ℃) is not conducive to industrial production

Method used

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  • Catalytic synthesis of ethyl linoleate with ionic liquid microemulsion and preparation method thereof
  • Catalytic synthesis of ethyl linoleate with ionic liquid microemulsion and preparation method thereof
  • Catalytic synthesis of ethyl linoleate with ionic liquid microemulsion and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Components and dosage of ionic liquid microemulsion: hydrophilic ionic liquid [Hmim]HSO 4 (purchased from Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences) 6 parts by weight, cyclohexane 5 parts by weight, conventional surfactant TX-100 (purchased from Guangzhou Jingke Chemical Glass Instrument Co., Ltd.) 24 parts by weight.

[0035] Under the condition of 25°C, the surfactant TX-100 and the imidazole ionic liquid 1-hexyl-3-methylimidazolium bisulfate were uniformly mixed, the stirring speed was 700 rpm, and stirring was carried out for 5 minutes to obtain a clear and transparent mixture. Then add cyclohexane and mix it uniformly, stir at a stirring speed of 700 rpm, and stir for 5 minutes to obtain a clear and transparent ionic liquid microemulsion with good high temperature stability.

[0036] Take 7.6049g of ionic liquid microemulsion, 5.6256g of linoleic acid, and 5.7181g of ethanol, stir and mix, and carry out esterification reaction under stirrin...

Embodiment 2

[0039] Components and dosage of ionic liquid microemulsion: hydrophilic ionic liquid [Hmim]HSO 4 (purchased from Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences) 2 parts by weight, cyclohexane 1 part by weight, conventional surfactant TX-100 (purchased from Guangzhou Jingke Huabo Instrument Co., Ltd.) 4 parts by weight.

[0040] Under the condition of 25°C, the surfactant TX-100 and the imidazole ionic liquid 1-hexyl-3-methylimidazolium bisulfate were uniformly mixed, the stirring speed was 700 rpm, and stirring was carried out for 5 minutes to obtain a clear and transparent mixture. Then add cyclohexane and mix it uniformly, stir at a stirring speed of 700 rpm, and stir for 5 minutes to obtain a clear and transparent ionic liquid microemulsion with good high temperature stability.

[0041]Take 6.284g of ionic liquid microemulsion, 5.7845g of linoleic acid, and 5.6226g of ethanol, stir and mix, and carry out esterification reaction under stirring, wherein th...

Embodiment 3

[0044] Components and dosage of ionic liquid microemulsion: hydrophilic ionic liquid [Bmim] HSO 4 (purchased from Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences) 6 parts by weight, cyclohexane 5 parts by weight, conventional surfactant TX-100 (purchased from Guangzhou Jingke Chemical Glass Instrument Co., Ltd.) 24 parts by weight.

[0045] At 25°C, mix the surfactant TX-100 with the imidazole ionic liquid 1-butyl-3-methylimidazolium bisulfate evenly, stir at a speed of 1000 rpm, and stir for 5 minutes to obtain a clear and transparent mixture , then add cyclohexane and mix it uniformly, stir at a stirring speed of 1000 rpm, and stir for 5 minutes to obtain a clear and transparent ionic liquid microemulsion with good high temperature stability.

[0046] Take 7.5950g of ionic liquid microemulsion, 5.6230g of linoleic acid, and 5.5346g of ethanol, stir and mix, and carry out esterification reaction under stirring, wherein the stirring speed is 1000 rpm, the re...

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Abstract

The invention belongs to the technical field of preparation of ethyl linoleate, and discloses a method for catalytically synthesizing ethyl linoleate with ionic liquid microemulsion and a preparation method thereof. Its preparation process: (1) add a non-polar solvent to the conventional surfactant, mix evenly, then drop into the imidazole ionic liquid, and mix well to obtain a single ionic liquid microemulsion; (2) add linoleic acid and ethanol In the above-mentioned single ionic liquid microemulsion, the reaction is heated and rotated to obtain ethyl linoleate. The method of the present invention utilizes a single ionic liquid microemulsion with good high temperature stability as a reaction medium, increases the contact area between the catalyst and the reaction substrate and solubilizes the generated water in the inner core of the ionic liquid microemulsion to accelerate the reaction rate; the catalyst used has high activity , but less corrosion to equipment and low equipment requirements, which solves the problems of high catalyst cost, serious equipment corrosion, low reaction yield, poor product quality, harsh reaction conditions and other problems in the prior art, and can be widely used in catalytic esterification reaction middle.

Description

technical field [0001] The invention belongs to the technical field of preparation of ethyl linoleate, in particular to an ionic liquid microemulsion catalytic synthesis of ethyl linoleate and a preparation method thereof. Background technique [0002] Ethyl linoleate is a colorless to pale yellow oily liquid. Ethyl linoleate, like linoleic acid, has the effect of lowering cholesterol and blood lipids, and can effectively prevent or alleviate atherosclerosis. The side reaction of ethyl linoleate is much lighter than that of oleic acid. It can also be used as a pharmaceutical raw material. [0003] Concentrated sulfuric acid was often used as a catalyst in the esterification reaction of the early synthesis of ethyl linoleate, but there were problems such as large discharge of acidic wastewater in the production process and serious corrosion of production equipment in this process. Subsequent researchers used solid superacids instead of liquid acids, but the industrial appli...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C67/08C07C69/587B01J31/02
CPCC07C67/08B01J31/0284B01J2231/49C07C69/587
Inventor 杨志豪陈砺吴婷王逸堃于松宁严宗诚
Owner SOUTH CHINA UNIV OF TECH