Preparation method for conjugated oil, conjugated oil and application thereof

Abstract

The invention relates to the technical fields of oil deep processing and oil comprehensive utilization, and particularly discloses a preparation method for conjugated oil and application of the conjugated oil. The preparation method comprises the following steps: adding iodine into oil, reacting at the temperature of between 80 and 200DEG C for 0.5 to 5 hours under stirring in the nitrogen environment, and removing the iodine to obtain the conjugated oil. The preparation method is simple, the using amount of a catalyst is small, the conversion rate is high and solvents are not required to be added. Illegal cooking oil also can be taken as a raw material which is low in cost. The conjugated oil prepared can serve as a raw material for preparing fine chemicals, slow release fertilizers or controlled-release fertilizers.

Description

technical field

[0001] The invention relates to the technical field of oil processing and comprehensive utilization of oil, in particular to a preparation method of conjugated oil and the application of the conjugated oil. Background technique

[0002] Oil molecules often contain polyunsaturated fatty acids, and polyunsaturated fatty acids containing conjugated double bond systems are called conjugated fatty acids. The two most common conjugated fatty acids are octadecadienoic acid and octadecadienoic acid, namely Conjugated linoleic acid (CLA) and conjugated linolenic acid (CLNA). Fats containing conjugated fatty acids are collectively referred to as conjugated fats.

[0003] The existing methods of conjugation of oils and fats can be roughly divided into two categories: biological methods and chemical methods. The biological method is to use specific enzymes or microorganisms to catalyze the corresponding substrates to obtain conjugated oils. The reaction conditions are...

Examples

Embodiment 1

[0068] Weigh 100g of transgenic soybean oil (the mass fraction of linoleic acid as determined by gas chromatography is 50.88%, and the mass fraction of linolenic acid is 6.86%, purchased from COFCO Group) and 0.5g of elemental iodine are placed in a three-necked flask, heated and stirred, and passed through immediately. Inject high-purity nitrogen, reflux at 180°C for 3 hours, and then turn off the nitrogen after cooling down to room temperature. The product was washed three times with dilute sodium thiosulfate solution, washed three times with distilled water, and dried over anhydrous sodium sulfate to obtain a sample. The reaction conversion rate was determined to be 97.5% by ultraviolet absorption spectroscopy.

Embodiment 2

[0070] Weighed 100g of transgenic soybean oil (the mass fraction of linoleic acid was 50.88% and the mass fraction of linolenic acid was 6.86% as determined by gas chromatography, purchased from COFCO) and 0.1g of elemental iodine were placed in a three-necked flask, heated and stirred, and passed through immediately. Inject high-purity nitrogen (99.99%), reflux at 140°C for 2 hours, and then turn off the nitrogen after cooling down to room temperature. The product was washed three times with dilute sodium thiosulfate solution, washed three times with distilled water, and dried over anhydrous sodium sulfate to obtain a sample. The reaction conversion rate was determined to be 92.3% by ultraviolet absorption spectroscopy.

Embodiment 3

[0072] Weighed 100g of transgenic soybean oil (the mass fraction of linoleic acid was 50.88% and the mass fraction of linolenic acid was 6.86% as determined by gas chromatography, purchased from COFCO Group) and 1g of elemental iodine were placed in a three-necked flask, heated and stirred, and immediately passed into High-purity nitrogen, reflux at 100°C for 1 hour, and then turn off the nitrogen after cooling down to room temperature. The product was washed three times with dilute potassium iodide solution, washed three times with distilled water, and dried over anhydrous sodium sulfate to obtain a sample. The reaction conversion rate was 96.1% as determined by ultraviolet absorption spectrum.

technical field

[0001] The invention relates to the technical field of oil processing and comprehensive utilization of oil, in particular to a preparation method of conjugated oil and the application of the conjugated oil. Background technique

[0002] Oil molecules often contain polyunsaturated fatty acids, and polyunsaturated fatty acids containing conjugated double bond systems are called conjugated fatty acids. The two most common conjugated fatty acids are octadecadienoic acid and octadecadienoic acid, namely Conjugated linoleic acid (CLA) and conjugated linolenic acid (CLNA). Fats containing conjugated fatty acids are collectively referred to as conjugated fats.

[0003] The existing methods of conjugation of oils and fats can be roughly divided into two categories: biological methods and chemical methods. The biological method is to use specific enzymes or microorganisms to catalyze the corresponding substrates to obtain conjugated oils. The reaction conditions are...

Examples

Embodiment 1

[0068] Weigh 100g of transgenic soybean oil (the mass fraction of linoleic acid as determined by gas chromatography is 50.88%, and the mass fraction of linolenic acid is 6.86%, purchased from COFCO Group) and 0.5g of elemental iodine are placed in a three-necked flask, heated and stirred, and passed through immediately. Inject high-purity nitrogen, reflux at 180°C for 3 hours, and then turn off the nitrogen after cooling down to room temperature. The product was washed three times with dilute sodium thiosulfate solution, washed three times with distilled water, and dried over anhydrous sodium sulfate to obtain a sample. The reaction conversion rate was determined to be 97.5% by ultraviolet absorption spectroscopy.

Embodiment 2

[0070] Weighed 100g of transgenic soybean oil (the mass fraction of linoleic acid was 50.88% and the mass fraction of linolenic acid was 6.86% as determined by gas chromatography, purchased from COFCO) and 0.1g of elemental iodine were placed in a three-necked flask, heated and stirred, and passed through immediately. Inject high-purity nitrogen (99.99%), reflux at 140°C for 2 hours, and then turn off the nitrogen after cooling down to room temperature. The product was washed three times with dilute sodium thiosulfate solution, washed three times with distilled water, and dried over anhydrous sodium sulfate to obtain a sample. The reaction conversion rate was determined to be 92.3% by ultraviolet absorption spectroscopy.

Embodiment 3

[0072] Weighed 100g of transgenic soybean oil (the mass fraction of linoleic acid was 50.88% and the mass fraction of linolenic acid was 6.86% as determined by gas chromatography, purchased from COFCO Group) and 1g of elemental iodine were placed in a three-necked flask, heated and stirred, and immediately passed into High-purity nitrogen, reflux at 100°C for 1 hour, and then turn off the nitrogen after cooling down to room temperature. The product was washed three times with dilute potassium iodide solution, washed three times with distilled water, and dried over anhydrous sodium sulfate to obtain a sample. The reaction conversion rate was 96.1% as determined by ultraviolet absorption spectrum.

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