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Method for extracting free fatty acid in vegetable crude oil

A free fatty acid and crude oil technology, applied in the direction of fat oil/fat refining, fat production, etc., can solve the problems of non-biodegradable, low safety factor, difficult recovery, etc., to achieve easy separation and purification, small loss of neutral oil, oil good product stability

Inactive Publication Date: 2020-11-10
SERICULTURE & AGRI FOOD RES INST GUANGDONG ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is currently reported that the deacidification strategy of solvent extraction is to use organic solvents, supercritical carbon dioxide fluid, ionic liquids, and mixed solvents to achieve deacidification. Compared with the alkali refining method and distillation method, this method has mild conditions and low energy consumption. , the most important thing is that the loss of neutral oil and functional components is obviously low, but traditional chemical solvents have problems such as non-biodegradable, low safety factor and difficult recovery

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh a certain mass of choline chloride and glycerin, mix them according to the molar ratio of 1:2, the total mass is 100g, add them to the round bottom flask in turn, heat and continuously stir the water bath to form a transparent liquid. Add 100g of crude rice bran oil, crude soybean oil and crude rapeseed oil to the above-prepared solvent, stir the mixture in a water bath at 50°C at 500r / min for 10min, let stand at room temperature to separate two phases, and take the upper oil sample for detection and analysis. The acid value of rice bran crude oil is 1.04KOH mg / g, the deacidification rate is 91.72%, the neutral oil loss rate is 3.26%, the acid value of soybean crude oil is 0.39KOH mg / g, the deacidification rate is 84.27%, and the neutral oil loss rate The acid value of rapeseed crude oil was 0.46KOH mg / g, the deacidification rate was 83.92%, and the neutral oil loss rate was 3.56%.

Embodiment 2

[0030] Weigh a certain mass of choline chloride and ethylene glycol, mix them in a molar ratio of 1:2, the total mass is 100g, add them into a round bottom flask, heat and continuously stir in a water bath to form a transparent liquid. Add 100g of crude rice bran oil, crude soybean oil and crude rapeseed oil to the above-prepared solvent, stir the mixture in a 40°C water bath at 500r / min for 20min, let stand at room temperature to separate two phases, and take the upper oil sample for detection and analysis. The acid value of rice bran crude oil was 1.36KOH mg / g, the deacidification rate was 89.25%, and the neutral oil loss rate was 5.13%. The acid value of soybean crude oil was 0.58KOH mg / g, the deacidification rate was 76.61%, and the neutral oil loss rate The acid value of rapeseed crude oil was 0.72KOH mg / g, the deacidification rate was 74.83%, and the neutral oil loss rate was 6.34%.

Embodiment 3

[0032] Weigh a certain mass of choline chloride and xylitol, mix them according to the molar ratio of 1:1, the total mass is 100g, add them into a round bottom flask, heat and continuously stir the water bath to form a transparent liquid. Add 100g of crude rice bran oil, crude soybean oil and crude rapeseed oil to the above-prepared solvent, stir the mixture in a 60°C water bath at 500r / min for 30min, let stand at room temperature to separate two phases, and take the upper oil sample for detection and analysis. The acid value of rice bran crude oil is 0.57KOH mg / g, the deacidification rate is 95.46%, and the neutral oil loss rate is 2.82%. The acid value of soybean crude oil is 0.25KOH mg / g, the deacidification rate is 89.92%, and the neutral oil loss The acid value of rapeseed crude oil was 0.34KOH mg / g, the deacidification rate was 88.12%, and the neutral oil loss rate was 2.48%.

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Abstract

The invention discloses a method for extracting free fatty acid in crude vegetable oil, which comprises the following steps: mixing a polyol eutectic solvent with the crude vegetable oil at 40-90 DEGC, stirring the mixture, carrying out standing treatment to form two phases, and separating the upper oil phase to obtain the crude vegetable oil from which the free fatty acid is removed. The methodhas the advantages of simple process, convenient operation, easy separation and purification of products, good deacidification effect, small loss of neutral oil, low cost, simplicity, greenness, safety and the like.

Description

technical field [0001] The invention relates to a processing technology for refining and deacidifying vegetable crude oil, in particular to a method for extracting and removing free fatty acids in vegetable crude oil by using polyalcohols natural deep eutectic solvent. Background technique [0002] Vegetable oil has a prominent position in the oil consumption market due to its rich nutritional components and obvious price advantages. Vegetable crude oil is usually formed during the virgin pressing process of vegetable oil, and its components are extremely complex. In addition to the required glycerides and active ingredients, there are other components such as free fatty acids, proteins, pigments, and unpleasant flavors. etc. The presence of these substances in crude oil not only fails to meet the standards of edible oil, but even threatens the health of consumers. Therefore, oil refining is a necessary process in the oil processing process. [0003] The endogenous lipase o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B3/00
CPCC11B3/006
Inventor 周鹏飞邓媛元张名位魏振承张雁唐小俊刘光李萍王佳佳
Owner SERICULTURE & AGRI FOOD RES INST GUANGDONG ACAD OF AGRI SCI
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