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A kind of method for preparing dehydrated castor oil

A dehydrated castor oil and castor oil technology, applied in the direction of fat oil/fat refining, fat production, etc., can solve the problems of cumbersome operation and poor product quality, and achieve the effects of simplified production procedures, easy large-scale promotion, and light color

Active Publication Date: 2019-07-09
泰州杜伦复合新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved in the present invention is to provide a method for preparing dehydrated castor oil to solve the problems of poor product quality and cumbersome operation in the prior art

Method used

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  • A kind of method for preparing dehydrated castor oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 50mL of castor oil and 5mL of deionized water into a 100mL autoclave, tighten the lid of the kettle, purge 3 times with high-purity carbon dioxide, close the pressure relief valve, feed high-purity carbon dioxide with an initial pressure of 1MPa, and set the temperature 150°C, the stirring rate is 200n / min, after the temperature is raised to 150°C, the pressure in the kettle is 6.5MPa, and high-purity nitrogen gas is introduced to raise the pressure to 7.5MPa, and after maintaining this condition for 0.5h, stop heating and continue stirring. Cool to room temperature, depressurize, discharge, centrifugal separation, record hydroxyl value, iodine value are respectively 159mg KOH / g and 88g I 2 / 100g.

Embodiment 2

[0028] Add 50mL of castor oil and 10mL of deionized water into a 100mL autoclave, tighten the lid of the kettle, purge 5 times with high-purity carbon dioxide, close the pressure relief valve, feed high-purity carbon dioxide with an initial pressure of 5MPa, and set the temperature 180°C, the stirring rate is 800n / min, after the program temperature rises to 180°C, the pressure in the kettle is 13.3MPa, after maintaining this condition for 1.0h, stop heating, continue stirring, cool to room temperature, release the pressure, discharge, centrifuge, The measured hydroxyl value and iodine value are 107mg KOH / g and 96g I respectively 2 / 100g.

Embodiment 3

[0030] Add 50mL of castor oil and 15mL of deionized water into a 100mL autoclave, tighten the lid of the kettle, purge once with high-purity carbon dioxide, close the pressure relief valve, feed high-purity carbon dioxide with an initial pressure of 3MPa, and set the temperature 250°C, the stirring rate is 600n / min, after the temperature is programmed to 250°C, the pressure in the kettle is 11.6MPa, and after maintaining this condition for 3.0h, stop heating, continue stirring, cool to room temperature, release the pressure, discharge, and centrifuge. The measured hydroxyl value and iodine value are 95mg KOH / g and 89g I respectively 2 / 100g.

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Abstract

The invention discloses a method for preparing dehydrated castor oil. The dehydrated castor oil is prepared through a dehydration reaction of castor oil in supercritical carbon dioxide environment. Compared with the prior art, the method has the advantages of only additioin of a proper amount of deionized water to a reaction system without other catalysts, reduction of the viscosity and the mass and heat transfer resistance through using a supercritical fluid technology, simplification of the production process of dehydrated castor oil, great shortening of the reaction time, production cost reduction, and easy large-scale promotion. The dehydrated castor oil prepared in the invention has the advantages of high purity, light color, high and stable iodine number, and low hydroxyl value.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a method for preparing dehydrated castor oil. Background technique [0002] my country is rich in castor resources, and the castor oil produced by it is a vegetable oil with unique properties in nature. Triricinoleic acid (12-hydroxyoctadecene-9 acid) glyceride is its main component. There are hydroxyl groups on the ester chain, so it has active chemical properties, and its industrial application value can be improved through deep processing. Among them, dehydrated castor oil is one of the most important products in the deep processing of castor oil, and its main use is as a raw material for coatings. As a kind of drying oil, dehydrated castor oil has the advantages of non-yellowing, fast film-forming speed, wear resistance, high toughness and strong adhesion, so it is widely used in the process of coating preparation; at the same time, dehydrated castor oil Containi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C11B3/02
CPCC11B3/02
Inventor 丁建飞严翠霞马田林邵荣许伟
Owner 泰州杜伦复合新材料有限公司
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