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

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...