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Method for separating and modifying plant oil

A vegetable oil modification technology, applied in fatty acid production, organic chemistry, fatty acid esterification, etc., can solve the problems of loss of solvent, difficulty in separating saturated and unsaturated fatty acid glycerides, difficulty in separating unsaturated fatty acid glycerides, etc. To achieve the effect of increasing conversion rate and promoting epoxidation

Active Publication Date: 2013-12-11
浙江嘉澳环保科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is simple to operate and the conditions are mild, but it will consume a lot of solvent
However, there are both saturated fatty acids and unsaturated fatty acids in most fatty acid glyceride molecules, and the separation of unsaturated fatty acid glycerides in glycerides of mixed saturated fatty acids and unsaturated fatty acids is very difficult, so it is difficult to separate saturated and unsaturated fatty acid glycerides. bigger

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) 1 weight part of vegetable oil (iodine value 110%, acid value 0.5mgKOH / g) was placed in a beaker, 1 weight part of methanol was added to it, and it was heated to 40° C. at a constant temperature for 10 minutes, and then continued to heat up to 70°C. ℃, the sulfuric acid that the concentration is 98% is added therein, and the add-on amount of sulfuric acid is 0.1% of the weight of the vegetable oil, and the methyl esterification reaction is carried out for 1 hour. Methods Polydimethylsiloxane composite membrane (German SULZER company, model: PERVAP2256) was used. The operating conditions of pervaporation were: vacuum degree 700Pa, temperature 66℃, flow rate 50L / h, after the reaction, the product was distilled to remove residual methanol and washed with water dry.

[0016] (2) mix the product after the step (1) with N-bromosuccinimide in a weight ratio of 1:1, react at 50 ° C, and use the resulting product with methanol and n-hexane having a volume ratio of 3:1 The m...

Embodiment 2

[0019] (1) 1 weight part of vegetable oil (iodine value 110%, acid value 0.5mgKOH / g) was placed in a beaker, 1 weight part of methanol was added to it, and it was heated to 40° C. and kept at a constant temperature for 10 minutes, and then continued to heat up to 80° C. ℃, the sulfuric acid that the concentration is 98% is added therein, and the add-on of the sulfuric acid is 1% of the weight of the vegetable oil, and the methyl esterification reaction is carried out for 1.5 hours. The vaporization method adopts polydimethylsiloxane composite membrane (German SULZER company, model: PERVAP2256), and the pervaporation operating conditions are: vacuum degree 700Pa, temperature 66°C, flow rate 50L / h, after the reaction, the residue is distilled to remove residual methanol And washed and dried.

[0020] (2) mixing the product treated in step (1) with N-bromosuccinimide in a molar ratio of 1:2, reacting at 60) °C, and using the methanol and The mixed extractant of n-hexane is extra...

Embodiment 3

[0023] (1) 1 weight part of vegetable oil (iodine value 110%, acid value 0.5mgKOH / g) is placed in a beaker, 1 weight part of methanol is added to it, and it is heated to 50° C. at a constant temperature for 10 minutes, and then continues to heat up to 80° C. ℃, to wherein add the sulfuric acid that concentration is 98%, the add-on of sulfuric acid is 0.5% of vegetable oil weight, carry out methyl esterification reaction 0.5 hour, adopt pervaporation method to recycle methanol to reaction system in the reaction process, described infiltration The vaporization method adopts polydimethylsiloxane composite membrane (German SULZER company, model: PERVAP2256). The operating conditions of pervaporation are: vacuum degree 700Pa, temperature 66°C, flow rate 50L / h, after the reaction, the residue is distilled to remove residual methanol And washed and dried.

[0024] (2) mixing the product treated in step (1) with N-bromosuccinimide in a molar ratio of 1:3, reacting at 70°C, and mixing ...

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Abstract

The invention provides a method for separating and modifying plant oil. The method provided by the invention is characterized by comprising the following steps of: firstly, adding methyl alcohol into plant oil, heating to 30-50 DEG C, insulating for 5-15 minutes, continuously heating to 70-100 DEG C, adding sulphuric acid, carrying out methyl esterification, removing the rest methyl alcohol by distilling the obtained product, washing and drying; secondly, mixing products treated by the step one with N-bromo-succinimide, reacting at the temperature of 30-70 DEG C, extracting the obtained product with a mixed extracting agent of the methyl alcohol and normal hexane, and distilling a methyl alcohol layer to remove the methyl alcohol, so that alpha-halogenated fatty acid methyl ester can be obtained; and thirdly, adding hydrogen peroxide and a formic acid solution into the product of the step two, namely alpha-halogenated fatty acid methyl ester under the condition that the temperature is 45-55 DEG C, stirring while a phosphor heteropoly tungstate phase transfer catalyst is added, carrying out epoxidation reaction, centrifuging to remove a water layer, carrying out alkali washing and washing, and drying, thus obtaining the finished product epoxy halogenated fatty acid methyl ester. The epoxide number of the obtained product is higher.

Description

technical field [0001] The invention relates to a method for separating and modifying vegetable oil. The vegetable oil is used as a raw material to extract the unsaturated fatty acid, and its structure is modified, which not only realizes the utilization rate of vegetable oil, but also improves the conversion of epoxidation reaction. Rate. Background technique [0002] There are saturated fatty acid glycerides and unsaturated fatty acid glycerides in vegetable oils. The content of unsaturated fatty acid glycerides is high. The fatty acid content of different vegetable oils and fats is different. Taking soybean oil as an example, soybean oil contains nearly 90% of unsaturated fatty acids. (mainly linoleic acid, oleic acid, linolenic acid), only 10% saturated fatty acids (mainly palmitic acid and stearic acid), and the rest contain a small amount of phospholipids and sterols, beta-carotene, vitamin E, etc. There are many methods for the separation of fatty acids, among which ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C11C3/00C11C3/04C07D303/42C07D301/12
Inventor 沈健崔哲
Owner 浙江嘉澳环保科技股份有限公司
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