Low temperature decolouring method and device for plant oil

A vegetable oil and decolorization technology, which is applied in the field of vegetable oil refining, can solve the problems of reducing oil quality and oil viscosity, and achieve the effects of reducing energy consumption, reducing losses, and avoiding the generation of catalytic oxidation and decomposition products of oil

Active Publication Date: 2012-01-11
SHANDONG BOHI INDUSTRY CO LTD +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most oil companies use 105-115°C for decolorization. The higher decolorization temperature enhances the adsorption activity of the decolorizer, reduces the viscosity of the oil, and is conducive to the adsorption of small molecular substances such as phosphorus, soap, pigments, and oxidation products. However, At higher temperatures, acidic adsorbents can promote the oxidation of oils and fats, and also promote the conversion of hydroperoxides to hydroxylates and conjugated products, and at the same time cause V E Oxidation and adsorption of beneficial trace elements, etc., reducing oil quality

Method used

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  • Low temperature decolouring method and device for plant oil
  • Low temperature decolouring method and device for plant oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Soybean neutralized oil first enters the filter equipped with waste decolorizing agent to remove part of phosphorus, soap and pigment, then enters the mixer, and adds 0.5% decolorizing clay to mix with the oil weight, so as to prevent the decolorizing clay from entering the pre-decolorizer in lumps, causing White clay is wasted; then enter the pre-decolorizer, at 85°C, under the action of mechanical stirring and steam stirring of the pre-decolorizer, vegetable oil and bleaching clay are fully mixed and contacted, pre-decolorized for 10 minutes, and part of the pigment in the oil is removed; complete pre-decolorization After decolorization, the decolorized oil enters the decolorizer through the liquid level difference to complete further decolorization. In the decolorizer, the decolorized oil passes through the overflow, and decolorizes in the channels between the baffles in turn, and the decolorization time is guaranteed to be 15 minutes. There is saturated steam in the...

Embodiment 2

[0023] The super degummed soybean oil first enters the filter equipped with waste decolorizer to remove part of the phosphorus and pigment, then enters the mixer, and adds 0.7% decolorized clay for oil mixing to prevent the decolorized clay from entering the pre-decolorizer in lumps, resulting in waste of clay Then enter the pre-decolorizer, at 80°C, under the mechanical stirring and steam stirring of the pre-decolorizer, the vegetable oil and the bleaching clay are fully mixed and contacted, and the pre-decolorization is 7min, and part of the pigment in the oil is removed; after the pre-decolorization is completed , the decolorized oil enters the decolorizer through the liquid level difference to complete further decolorization. In the decolorizer, the decolorized oil passes through the overflow, and decolorizes in the channels between the baffles in turn, and the decolorization time is guaranteed to be 20 minutes. There is saturated steam in the decolorization chamber, and t...

Embodiment 3

[0026] The rapeseed neutralized oil first enters the filter equipped with waste decolorizer to remove part of the phosphorus and soap, then enters the mixer, and adds 0.8% decolorized clay to the oil to mix, so as to prevent the decolorized clay from entering the pre-decolorizer in lumps, resulting in bleaching clay Waste; then enter the pre-decolorizer, at 95°C, under the mechanical agitation and steam agitation of the pre-decolorizer, the vegetable oil and the decolorization clay are fully mixed and contacted, and the pre-decolorization is 10min, and part of the pigment in the oil is removed; the pre-decolorization is completed Finally, the decolorized oil enters the decolorizer through the liquid level difference to complete further decolorization. In the decolorizer, the decolorized oil passes through the overflow, and decolorizes in the channels between the baffles in turn, and the decolorization time is guaranteed to be 15 minutes. There is saturated steam in the decolor...

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Abstract

The invention provided a low temperature decolouring method and a device for plant oil. Before oil enters a steam mill decolouring device, a pre-decolouring device with the combination of stripping and mechanical stirring is added, so as to improve the mixing uniformity of a decolorant and oil and minimize the decolouring time and steam amount; on the basis of guaranteeing the decolouring effect of the decolorant, low temperature decolouring is selected, thus effectively avoiding the catalysis effect of oil to the decolorant, minimizing oxidative decomposition and preventing the generation ofadverse substances.

Description

technical field [0001] The invention relates to vegetable oil refining technology, in particular to a low-temperature decolorization method and equipment for vegetable oil. Background technique [0002] The adsorption and decolorization of oil is to use certain decolorizer substances (such as bleaching earth, activated clay, activated carbon, silica gel, etc.) that have a strong selective adsorption effect on pigments to absorb pigments and other impurities in oils under certain conditions, so as to achieve decolorization. method of purpose. The main functions of decolorization are to remove pigment (mainly chlorophyll), remove trace metal ions, remove trace soap, phospholipid and other colloids and some odorous substances, remove polycyclic aromatic hydrocarbons and residual pesticides, etc. [0003] In the process of oil decolorization, the temperature required for physical adsorption should be controlled at 60-90°C, and the temperature for chemical adsorption should be c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B3/00C11B3/10
Inventor 白长军王兴国刘元法李玉玲李晓兵彭亮白红超
Owner SHANDONG BOHI INDUSTRY CO LTD
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