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Preparation method of methyl acetylricinolate

A technology of acetyl ricinoleic acid methyl ester and ricinoleic acid methyl ester, which is applied in the field of preparation of acetyl ricinoleic acid methyl ester, can solve the unfavorable industrialized large-scale production of acetyl ricinoleic acid methyl ester, low catalytic efficiency of the catalyst, and complex process cumbersome and other problems, to achieve the effect of realizing industrialized large-scale production, improving catalytic efficiency and improving economic benefits

Active Publication Date: 2014-08-20
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, there are few studies on the preparation of acetyl ricinoleic acid methyl ester from castor oil at home and abroad. Usually, strong alkali and strong acid catalysts are used to carry out methylation and acetylation of castor oil respectively to obtain acetyl ricinoleic acid methyl ester. In this method, the catalyst The catalytic efficiency is low, the process is complex and cumbersome, the reaction time is long, the cost is high, and the product yield is low, which is not conducive to realizing the industrialized large-scale production of acetyl ricinoleic acid methyl ester

Method used

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  • Preparation method of methyl acetylricinolate
  • Preparation method of methyl acetylricinolate
  • Preparation method of methyl acetylricinolate

Examples

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Effect test

Embodiment 1

[0043] Example 1 Preparation of methyl ricinoleate

[0044] Distill 10g of castor oil under reduced pressure to remove water and other solvents in castor oil, then add the treated castor oil into a three-necked flask with a mechanical stirring device, heat to 60°C, add methanol and ionic liquid catalyst [Hmim] HSO 4 , reacted at 60°C for 2 hours, then carried out vacuum distillation, distilled off excess methanol, stood to separate layers, recycled the ionic liquid catalyst in the lower layer, took the supernatant, and washed the supernatant with water for several times , add anhydrous sodium sulfate and dry overnight, obtain methyl ricinoleate, wherein the mol ratio of methyl alcohol and castor oil is 2:1, the consumption of ionic liquid catalyst is 5% of castor oil weight, the yield of product methyl ricinoleate The rate is 61.17%.

Embodiment 2

[0045] Example 2 Preparation of methyl ricinoleate

[0046] The method of present embodiment and embodiment 1 is basically the same, and difference is that the mol ratio of methyl alcohol and castor oil is 4:1, and catalyst consumption is 10% of castor oil weight, and temperature of reaction is 70 ℃, and the reaction times is 3 hours, The yield of the product methyl ricinoleate was 79.53%.

Embodiment 3

[0047] Example 3 Preparation of methyl ricinoleate

[0048] The method of present embodiment and embodiment 1 is basically the same, and difference is that the mol ratio of methyl alcohol and castor oil is 6:1, and catalyst consumption is 10% of castor oil weight, and temperature of reaction is 75 ℃, and the reaction times is 4 hours, The yield of the product methyl ricinoleic acid was 96.67%.

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Abstract

The invention provides a preparation method of methyl acetylricinolate, the preparation method comprises the following steps: step a, using ionic liquid catalyst (Hmim) HSO4 for methyl esterification of castor oil to obtain methyl ricinoleate; and step b: using the ionic liquid catalyst (Hmim) HSO4 for acetylization of the methyl ricinoleate to obtain the methyl acetylricinolate. According to the preparation method, the (Hmim) HSO4 ionic liquid catalyst is used for methyl esterification and acetylation of the castor oil to obtain the methyl acetylricinolate, and the method has the advantages of simple production process, low cost and high product yield, and is conducive to the realization of the industrialized mass production of the methyl acetylricinolate.

Description

technical field [0001] The invention belongs to the technical field of oil industry, and in particular relates to a preparation method of methyl acetyl ricinoleate. Background technique [0002] Castor (Ricinus communis) is an annual or perennial herbaceous plant of Euphoribia L. It is one of the top ten oil crops in the world and is widely planted in the world. More than 90% of the world's production. In my country, castor is mainly produced in Inner Mongolia, Jilin, Shandong and Shanxi. The oil content of castor bean is relatively high, accounting for about 45-55% of the seed weight, and the castor oil contained in it is the only natural fatty acid containing hydroxyl groups, which has special physical and chemical properties. Castor oil is an important chemical raw material, widely used in chemical industry, textile, light industry and medicine and other fields, mainly used in the production of high-grade lubricants, paints, coatings, soaps, inks, dyeing aids, plasticiz...

Claims

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Application Information

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IPC IPC(8): C07C69/732C07C67/31
CPCC07C67/08C07C67/31C07C69/73C07C69/732
Inventor 许伟葛小东邵荣吴俊丁建飞
Owner YANCHENG INST OF TECH
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