Deodorization method used for lowering content of 3-chlorine-1,2-propylene glycol in vegetable oil

A technology of propylene glycol ester and vegetable oil, which is applied in the direction of edible oil/fat, application, food science, etc., and can solve the problems of toxicity, increased production of 3-MCPDE in rapeseed oil, etc.

Active Publication Date: 2014-01-22
JIANGNAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

3-MCPDE may be hydrolyzed into free 3-MCPD under certain conditions in the body, thus showing toxicity, and its safety has become one of the hot spots of...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Deodorization method for reducing the content of 3-chloro-1,2-propanediol ester in vegetable oil:

[0020] Using decolorized corn oil as raw material, the decolorized corn oil is heated to 110°C through a heat exchanger, and then enters the distributor of the molecular still to distribute evenly. The temperature of the heating surface of the molecular still is 170°C, and the condensing surface of the built-in condenser The temperature is 5°C, the vacuum is 0.1Pa, the light phase odor components are condensed by the built-in condenser and flow into the light component collection tank, and the heavy phase is rapidly cooled to 45°C by the heat exchanger to obtain 3-chloro-1, Deodorized corn oil with a 2-propylene glycol ester content of less than 300 mg / kg.

[0021] Method for detecting 3-chloro-1,2-propanediol ester in oil by high performance liquid chromatography:

[0022] Step 1: Add 50 g of the deodorized corn oil obtained in the example into acetonitrile twice the vo...

Embodiment 2

[0028] Deodorization method for reducing the content of 3-chloro-1,2-propanediol ester in vegetable oil:

[0029] Using the decolorized sunflower oil as raw material, the decolorized sunflower oil is heated to 130°C through a heat exchanger, and then enters the distributor of the molecular still to spread evenly. The temperature of the heating surface of the molecular still is 190°C, and the built-in condenser condenses The surface temperature is 20°C and the vacuum degree is 5Pa. The light phase odor component is condensed by the built-in condenser and then flows into the light component collection tank. The heavy phase is rapidly cooled to 40°C by the heat exchanger to obtain 3-chloro-1 , Deodorized sunflower oil with a 2-propylene glycol ester content of less than 300 mg / kg.

[0030] The detection method was as shown in Example 1, and the content of the obtained 3-chloro-1,2-propanediol ester was not detected (below the detection limit).

Embodiment 3

[0032] Deodorization method for reducing the content of 3-chloro-1,2-propanediol ester in vegetable oil:

[0033] Using the decolorized soybean oil as raw material, the decolorized soybean oil is heated to 150°C through a heat exchanger, and then enters the distributor of the molecular still to distribute evenly. The temperature of the heating surface of the molecular still is 180°C, and the condensing surface of the built-in condenser The temperature is 15°C and the vacuum is 3Pa. The light phase odor components are condensed by the built-in condenser and flow into the light component collection tank. The heavy phase is rapidly cooled to 35°C by the heat exchanger to obtain 3-chloro-1,2 - Deodorized soybean oil with a propylene glycol ester content of less than 300 mg / kg.

[0034] The detection method was as shown in Example 1, and the content of the obtained 3-chloro-1,2-propanediol ester was 70 mg / kg.

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Abstract

The invention discloses a deodorization method used for lowering the content of 3-chlorine-1,2-propylene glycol in vegetable oil. The deodorization method comprises the following steps: with discolored vegetable oil as a raw material, and heating up the discolored vegetable oil to 110 DEG C-150 DEG C by a heat exchanger; feeding the heated vegetable oil to a material distributor of a molecular distiller and uniformly distributing, and setting the temperature of a heating surface of the molecular distiller to 170 DEG C-190 DEG C, wherein the temperature of a condensing surface of an internal condenser of the molecular distiller is 5 DEG C-20 DEG C, and vacuum degree is 0.1 Pa-5 Pa; enabling a light-phase odor component to flow into a light component collecting tank after condensing through the internal condenser, and quickly cooling heavy phase to 50 DEG C or lower by the heat exchanger to obtain deodorized vegetable oil with 3-chlorine-1,2-propylene glycol content smaller than 300 mg/kg. Compared with the prior art, the deodorization method disclosed by the invention has the advantages of lowering production amount of the 3-chlorine-1,2-propylene glycol in the deodorized vegetable oil and providing references for improving an existing vegetable oil refining process.

Description

technical field [0001] The invention relates to a deodorization method for reducing the content of 3-chloro-1,2-propanediol ester in vegetable oil, and belongs to the field of vegetable oil refining and deodorization. Background technique [0002] 3-Chloro-1,2-propanediol ester (3-MCPDE) is a compound formed by the esterification reaction between one or two hydroxyl groups of 3-chloro-1,2-propanediol (3-MCPD) and fatty acid respectively. There are 3 -Chloro-1,2-propanediol diester, 3-chloro-1,2-propanediol-1-monoester, 3-chloro-1,2-propanediol-2-monoester, they are usually easy to dissolve in oil and grease Formed during thermal processing of food. 3-MCPDE may be hydrolyzed into free 3-MCPD under certain conditions in the body, thus showing toxicity, and its safety has become one of the hot spots of food safety. [0003] At present, high content of 3-MCPDE has been found in refined oil, while its content in crude oil or unrefined oil is below the detection limit, indicatin...

Claims

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Application Information

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IPC IPC(8): C11B3/12A23D9/04
Inventor 金青哲周红茹王兴国刘睿杰邹孝强
Owner JIANGNAN UNIV
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