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Ethyl linoleate catalytically synthesized by using 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 with ionic liquid microemulsion, can solve problems such as unfavorable industrial production, and achieve improved conversion rate, accelerated reaction rate, and processing The effect of low material requirements

Active Publication Date: 2020-06-19
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Ethyl linoleate catalytically synthesized by using ionic liquid microemulsion and preparation method thereof
  • Ethyl linoleate catalytically synthesized by using ionic liquid microemulsion and preparation method thereof
  • Ethyl linoleate catalytically synthesized by using ionic liquid microemulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0035] Under the condition of 25℃, mix the surfactant TX-100 and the imidazole ionic liquid 1-hexyl-3-methylimidazole bisulfate evenly, stirring at 700 rpm, stirring for 5 minutes, to obtain a clear and transparent mixture. Then add cyclohexane and mix it uniformly 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 to stir and mix, and carry out the esterification reaction under stirring, wherein the stirring speed is 700 rp...

Embodiment 2

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

[0040] Under the condition of 25℃, mix the surfactant TX-100 and the imidazole ionic liquid 1-hexyl-3-methylimidazole bisulfate evenly, stirring at 700 rpm, stirring for 5 minutes, to obtain a clear and transparent mixture. Then add cyclohexane and mix it uniformly 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 6.284 g of ionic liquid microemulsion, 5.7845 g of linoleic acid, and 5.6226 g of ethanol to stir and mix, and carry out the esterification reaction under stirring, wherein the stirring speed is 700 re...

Embodiment 3

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

[0045] Under the condition of 25℃, mix the surface active agent TX-100 and the imidazole ionic liquid 1-butyl-3-methylimidazole hydrogen sulfate evenly at a stirring speed of 1000 rpm, stirring for 5 minutes, to obtain a clear and transparent mixture , And then add cyclohexane and mix it evenly at a stirring speed of 1000 revolutions per minute and stir for 5 minutes to obtain a clear and transparent ionic liquid microemulsion with good high temperature stability.

[0046] Take 7.5950 g of ionic liquid microemulsion, 5.6230 g of linoleic acid, and 5.5346 g of ethanol to stir and mix, and carry out the esterification reaction under...

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Abstract

The invention belongs to the technical field of preparation of ethyl linoleate, and discloses ethyl linoleate catalytically synthesized by using an ionic liquid microemulsion and a preparation methodthereof. The preparation process comprises the following steps: (1) adding a non-polar solvent into a conventional surfactant, carrying out uniform mixing, dropwise adding imidazole ionic liquid, andcarrying out sufficient mixing to obtain a single ionic liquid microemulsion; and (2) adding linoleic acid and ethanol into the single ionic liquid microemulsion, carrying out a heating reaction, andcarrying out rotary evaporation to obtain ethyl linoleate. According to the method, the single ionic liquid microemulsion with good high-temperature stability is used as a reaction medium, the contactarea of a catalyst and a reaction substrate is increased, and generated water is solubilized in an ionic liquid microemulsion core, so a reaction rate is increased; the used catalyst is high in activity, small in equipment corrosion and low in equipment requirement, the problems of high catalyst cost, serious equipment corrosion, low reaction yield, poor product quality, harsh reaction conditionsand the like in the prior art are solved; and the method can be popularized and applied to catalytic esterification reactions.

Description

Technical field [0001] The invention belongs to the technical field of the preparation of ethyl linoleate, and particularly relates to an ionic liquid microemulsion catalytic synthesis of ethyl linoleate and a preparation method thereof. Background technique [0002] Ethyl linoleate is a colorless to light yellow oily liquid. Ethyl linoleate and linoleic acid have the same effect of lowering cholesterol and blood lipids, which can effectively prevent or reduce 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 used as a catalyst in the early esterification reaction of ethyl linoleate. However, this process has problems such as large discharge of acidic wastewater and serious corrosion of production equipment. Subsequent researchers used solid superacids to replace liquid acids, but solid superacid catalysts have limited their industrial applica...

Claims

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Application Information

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Patent Type & Authority Applications(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
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