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Grease decoloring method

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

Active Publication Date: 2013-03-27
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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PUM

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Abstract

The invention discloses a grease decoloring method, belonging to the technical field of refining grease and used for solving the problems in grease decoloring that high temperature time is long, the product yield is low, and auxiliaries are in need and sewage is discharged. The grease decoloring method comprises the steps: increasing temperature of raw material oil to 150-170 DEG C through a heat exchanger, then sending the raw material oil into a molecular still, and evenly distributing on an evaporative surface with temperature of 190-245 DEG C through a distributor, wherein the vacuum degree ranges from 5Pa to 40 Pa; cooling light component pigment to 35-42 DEG C through a built-in condenser, wherein the cooled light component pigment flows in a light component collection tank and heavy components directly enter a heavy component collection tank; increasing the temperature of the heavy components to 230-260 DEG C through the heat exchanger, sending the heavy components to the molecular still, evenly distributing the material on the evaporative surface with temperature of 300-320 DEG C through the distributor under the vacuum degree of 0.1-5Pa, cooling light components to 35-42 DEG C through the built-in condenser, wherein the cooled light components flow in a decolored oil collection tank and the heavy components directly enter the heavy component collection tank. The grease decoloring method can be widely applied to the edible, cosmetic and fine chemical engineering fields.

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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IPC IPC(8): C11B3/12
Inventor 陈汉卿
Owner 陈汉卿
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