Method for reducing content of glycidyl ester in refined vegetable fat

A technology of glycidyl esters and vegetable oils, applied in the fields of edible oil/fat, fat production, food science, etc., can solve the problems of nutrient loss, high raw material requirements, adsorbent or enzyme treatment residues, etc., to improve product quality , The preparation method is simple, and the effect of specificity is good

Active Publication Date: 2017-08-25
SANMARK CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional refining process will undoubtedly cause a "disaster" to fatty acids. Not only will the nutrition be lost, but also many harmful substances such as glycidyl ester and 3-MCPD will be produced, which are harmful to health.
[0004] At present, there is no limit standard for glycidyl ester in the world
In 2012, the World Health Organization (WHO) Joint Expert Committee on Food Additives (JECFA) established a provisional maximum tolerated daily dose (PMTDI) of 3-chloropropanol as 2 μg / kg per kilogram of body weight, but has not yet formulated 3-chloropropanol Corresponding limits for alcohol esters and glycidyl esters
The main methods to control the content of glycidyl esters in oils are adsorption and enzymatic methods. These methods have high requirements on raw materials and complicated preparation methods, which are difficult to meet the needs of industrial production. In addition, there are still problems of adsorbent or enzyme preparation and residual problems.

Method used

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  • Method for reducing content of glycidyl ester in refined vegetable fat

Examples

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Comparison scheme
Effect test

Embodiment 1

[0034] A method for reducing glycidyl ester content in refined linseed oil, said method comprising the steps of:

[0035] ①Ultrasonic washing to reduce the precursors of glycidyl esters in crude oil: Ultrasonic washing of the crude oil before refining, the frequency of ultrasonic washing is 40kHz, and the time of ultrasonic washing is 25min, to remove the precursors of glycidyl esters in crude oil;

[0036] ②Optimize the refining process:

[0037] a. Degumming: Add the washed crude oil into the degumming tank, then add citric acid solution accounting for 0.1% of the oil weight and a mass concentration of 60%, stir and react for 40 minutes, and then spray the oil surface at 95°C, accounting for 10% of the oil weight. %, a sodium chloride solution with a mass concentration of 5%, let it stand for 2h;

[0038] b. Alkali refining: add 20Be sodium hydroxide solution to the degummed crude oil to react with the oil for 20 minutes, then spray 95°C, 10% of the oil weight, and 5% sodiu...

Embodiment 2

[0044] A method for reducing glycidyl ester content in refined linseed oil, said method comprising the steps of:

[0045] ①Ultrasonic washing to reduce the precursors of glycidyl esters in crude oil: Ultrasonic washing of crude oil before refining, the frequency of ultrasonic washing is 30kHz, and the time of ultrasonic washing is 35min, to remove the precursors of glycidyl esters in crude oil;

[0046] ②Optimize the refining process:

[0047] a. Degumming: Add the washed crude oil into the degumming tank, then add citric acid solution accounting for 0.2% of the oil weight and 50% mass concentration, stir and react for 30 minutes, and then spray 95°C on the oil surface, accounting for 8% of the oil weight. %, a sodium chloride solution with a mass concentration of 10%, let it stand for 2h;

[0048] b. Alkali refining: add 18Be sodium hydroxide solution to the degummed crude oil to react with the oil for 30 minutes, and then spray 95°C, 8% of the oil weight, and 10% sodium chl...

Embodiment 3

[0054] A method for reducing glycidyl ester content in refined linseed oil, said method comprising the steps of:

[0055] ①Ultrasonic washing to reduce the precursors of glycidyl esters in crude oil: Ultrasonic washing of crude oil before refining, the frequency of ultrasonic washing is 20kHz, and the time of ultrasonic washing is 45min, to remove the precursors of glycidyl esters in crude oil;

[0056] ②Optimize the refining process:

[0057] a. Degumming: Add the washed crude oil into the degumming tank, then add citric acid solution accounting for 0.3% of the oil weight and 40% mass concentration, stir and react for 20 minutes, and then spray 95°C on the oil surface, accounting for 5% of the oil weight. %, mass concentration is 20% sodium chloride solution, let stand for 2h;

[0058] b. Alkali refining: Add 16Be sodium hydroxide solution to the degummed crude oil to react with the oil for 40 minutes, then spray 95°C sodium chloride solution and purified water at 95°C, 5% o...

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Abstract

The invention relates to a method for reducing content of glycidyl ester in refined vegetable fat and belongs to the field of edible oil processing. The method comprises the following steps: (1) ultrasonically washing the crude oil before refining and removing precursor from the crude oil; (2) performing degumming, alkali refining and de-coloring treatment on the crude oil after ultrasonically washing, and then replacing an aqueous solution by using an acetic acid solution and performing steam distillation deodorizing under a vacuum environment; (3) adopting a reverse phase C18 solid-phase extraction column and absolute ethyl alcohol for eluting the deodorized crude oil, and then adopting a normal phase silica gel column and normal hexane-ethyl acetate for eluting and removing the solvent, thereby acquiring the vegetable fat in low content of glycidyl ester. According to the invention, the generation of glycidyl ester is controlled in the manner of optimizing oil processing process and oil refining production technology; the dual-solid phase extraction is adopted for effectively separating and reducing the content of glycidyl ester in the refined vegetable fat; the quality and edible safety of the edible oil can be promoted.

Description

technical field [0001] The invention relates to a method for reducing the content of glycidyl ester in refined vegetable oil, which belongs to the field of edible oil processing. Background technique [0002] Glycidyl fatty acid esters (GEs) are esterification products of glycidol and free fatty acids. As a common pollutant in refined vegetable oils, glycidyl ester has been widely concerned about its safety in recent years. According to toxicological experiments, the German Risk Assessment Committee (Federal Institute for Risk Assessment, BFR) proposed that glycidol produced by GEs during lipid metabolism in the human body is a genotoxic carcinogen. In addition, some studies have pointed out that GEs are also important precursors of carcinogens—3-chloro-1,2-propanediol (3-Chloro-1,2-propanediol, 3-MCPD) and its fatty acid esters. In the presence of hydrochloric acid, Glycidol is readily converted to 3-MCPD. 3-MCPD and glycidyl esters have become new pollutants in vegetabl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B3/00C11B3/04C11B3/06C11B3/10C11B3/14C11B3/16A23D9/04
CPCA23D9/04C11B3/001C11B3/008C11B3/04C11B3/06C11B3/10C11B3/14C11B3/16
Inventor 孙婷婷李燕杰王缈甄成
Owner SANMARK CORP
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