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Method for removing free fatty acid from fatty glyceride

A technology for free fatty acids and fatty acid glycerides, which is applied in the field of removing free fatty acids in fatty glycerides, can solve the problems of difficult product use, high acid value of finished products, human injury, etc. Effect

Active Publication Date: 2014-04-30
成都圆大生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Fatty acid glycerides are prone to produce free fatty acids during the production process, resulting in high acid value of the finished product. There are certain problems in the application of glycerides with high acid value, which may easily cause harm to the human body
The acid value of glycerides with low acid value in the prior art is generally greater than 1mgKOH / g, which causes certain difficulties in the use of this product. Therefore, whether a method with a lower acid value has become the focus of research

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The high acid value fatty acid glyceride raw material is first preheated to 70° C. under the condition of a pressure of 0.08 MPa. Then pump the high acid value fatty acid glyceride into the thin film evaporator after preheating, and conduct thin film evaporation at 130°C under the pressure of 1000Pa to remove water, and then perform molecular distillation on the high acid value fatty acid that evaporates to remove water, at 220°C, Carry out molecular distillation under the condition of pressure 10Pa, collect glyceride fraction to obtain the fatty acid glyceride of low acid value, and its acid value is 0.30mgKOH / g.

Embodiment 2

[0027] The high acid value fatty acid glyceride raw material is heated to 70°C under the pressure of 0.07MPa. Preheated high-acid glycerides are pumped into the thin-film evaporator, and thin-film evaporation is performed at 110°C and a pressure of 900Pa, and the high-acid fatty acids are evaporated to remove water, followed by molecular distillation, which is carried out at 200°C and a pressure of 10Pa. The glyceride fraction obtains fatty acid glycerides with low acid value, and its acid value is 0.33mgKOH / g.

Embodiment 3

[0029] The high fatty acid glyceride raw material is heated to 70°C under the pressure of 0.08MPa. Preheated high-acid glycerides are pumped into the thin-film evaporator, and thin-film evaporation is performed at 100°C and a pressure of 1000Pa, and the high-acid fatty acids are evaporated to remove moisture, followed by molecular distillation, which is carried out at 180°C and a pressure of 9Pa. The glyceride fraction obtains fatty acid glycerides with low acid value, and its acid value is 0.36mgKOH / g.

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Abstract

The invention relates to the technical field of oil and fat refining, in particular to a method for removing free fatty acid from fatty glyceride. The method comprises the following steps of using high acid value fatty glyceride as a raw material, preheating the high acid value fatty glyceride, physically dewatering the preheated high acid value fatty glyceride, and physically deacidifying the physically dewatered high acid value fatty glyceride, so as to finally obtain the low acid value fatty glyceride. The method for removing the free fatty acid from the fatty glyceride has the advantages that the cost is low, the process is simple, the consumed time is short, the safety is high, the problems of the high acid value fatty glyceride in application are solved, and the injury to persons by the high acid value fatty glyceride is avoided.

Description

[0001] The invention relates to the technical field of oil refining, in particular to a method for removing free fatty acids in fatty glycerides. Background technique [0002] In general, a slight increase in acid value and peroxide value will not cause damage to human health. However, if the acid value is too high, it will cause gastrointestinal discomfort, diarrhea and damage the liver. The acid value of oil is related to the raw materials for oil production, the methods of oil production and processing, the storage and transportation methods and conditions of oil and fat, etc. During the oil making process, it is decomposed by heat or lipase to produce free fatty acids, which increases the acid value in the oil. During the storage period, due to the action of moisture, temperature, light, lipase and other factors, the oil is decomposed into free fatty acids in the oil, which increases the acid value and reduces the storage stability. Therefore, we must remove free fatty a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C11B3/00C11B3/12
Inventor 郭春林李鹏婧张勇李沅锴苟荣吴向东
Owner 成都圆大生物科技有限公司