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Grease decoloring method

A grease and degumming technology, applied in the field of decolorization, can solve the problems of easy color reversal of grease, long cycle time, small processing capacity, etc., and achieve the effect of high product yield, short high temperature time, and no waste water discharge

Active Publication Date: 2014-07-02
陈汉卿
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantage of this method is that the decolorized oil is easy to reverse color after high temperature treatment, which directly affects its normal use. In addition, this method can only be limited to the decolorization of industrial oils. It is suitable for food, cosmetics and other fields. Prohibited
Chromatographic decolorization is currently widely used in laboratory-scale decolorization of oils. It is separated based on the principle of different retention times of pigments and oils in the chromatography column. The packing effect of the column is crucial to the decolorization effect. The column packing requirements are high, the processing capacity is too small, the cost is high, the cycle is long, and it is difficult to apply industrially

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] The degummed cottonseed oil is heated up to 150°C by the heat exchanger, then enters the molecular still, and is evenly distributed on the evaporation surface by the distributor. The temperature of the evaporation surface is 190°C, the vacuum is 5Pa, and the light component pigment is cooled to At 35°C, it flows into the light component collection tank, and the heavy component directly enters the heavy component collection tank. Then, the heavy component is heated up to 230°C through the heat exchanger, and enters the molecular still. The material is evenly distributed on the evaporation surface by the distributor. The temperature is 300°C, the vacuum is 1Pa, the light component is cooled to 36°C through the built-in condenser, and flows into the decolorized oil collection tank, and the heavy component directly enters the heavy component collection tank.

Embodiment 2

[0010] The degummed corn oil is heated up to 155°C through the heat exchanger, then enters the molecular still, and spreads evenly on the evaporation surface through the distributor. The temperature of the evaporation surface is 200°C, the vacuum degree is 15Pa, and the light component pigment is cooled to At 37°C, it flows into the light component collection tank, and the heavy component directly enters the heavy component collection tank. Then, the heavy component is heated up to 235°C through the heat exchanger, and enters the molecular still. The material is evenly distributed on the evaporation surface by the distributor. The temperature is 305°C, the vacuum is 2Pa, the light component is cooled to 38°C through the built-in condenser, and flows into the decolorized oil collection tank, and the heavy component directly enters the heavy component collection tank.

Embodiment 3

[0012] The degummed soybean oil is heated to 160°C through the heat exchanger, then enters the molecular still, and is evenly distributed on the evaporation surface by the distributor. The temperature of the evaporation surface is 215°C, the vacuum degree is 40Pa, and the light component pigment is cooled to At 42°C, it flows into the light component collection tank, and the heavy component directly enters the heavy component collection tank. Then, the heavy component is heated up to 240°C through the heat exchanger, and enters the molecular still. The material is evenly distributed on the evaporation surface by the distributor. The temperature is 310°C, the vacuum is 5Pa, the light component is cooled to 40°C through the built-in condenser, and flows into the decolorized oil collection tank, and the heavy component directly enters the heavy component collection tank.

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Abstract

The invention discloses a method for decolorizing oil. It belongs to the technical field of refined oil. It is used to solve the problems of long high temperature time, low product yield, need for additives and sewage discharge in oil decolorization. The decolorization method of oil is to heat up the raw oil through a heat exchanger to 150-170°C and then enter the molecular still, and spread it evenly on the evaporation surface at a temperature of 190-245°C through a distributor, vacuum degree 5-40Pa, light component pigment After cooling down to 35-42°C through the built-in condenser, it flows into the light component collection tank, and the heavy component directly enters the heavy component collection tank. Then, the heavy component is heated up to 230-260°C through the heat exchanger, and then enters the molecular still. The device is evenly distributed on the evaporation surface at a temperature of 300-320°C, and the vacuum degree is 0.1-5Pa. The light component is cooled to 35-42°C through the built-in condenser, and flows into the decolorized oil collection tank, and the heavy component directly enters the heavy component collection tank. The decolorization method using the oil can be widely used in the fields of food, cosmetics and fine chemicals.

Description

technical field [0001] The invention relates to a decolorization method, in particular to a decolorization method for oil. Background technique [0002] The color index of oil is one of the characteristic indicators for evaluating its quality, especially for oils used in the fields of food, cosmetics and fine chemicals, the requirements for its color are more stringent. Under the premise of other indicators being the same, oils with lighter color are more popular. At present, the decolorization methods of oil mainly include the following several methods: adsorption method, chemical method and chromatography method. The adsorption method mainly uses white clay, diatomaceous earth, attapulgite, activated carbon and other adsorption materials as decolorizing agents, and mixes them with oil for about 20 minutes at a high temperature of 105-120°C and a vacuum of 266Pa, and then filters the decolorizing agent through a filter. Get bleaching oil. This method is currently a decol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C11B3/12
Inventor 陈汉卿
Owner 陈汉卿
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