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Edible plant oil non-soap refining method

A technology of edible vegetable oil and crude oil, which is applied in the direction of fat oil/fat refining and fat production, etc. It can solve the problems of no economical and reliable dephosphorization process, metal ion color reversion, and incomplete dephosphorization, so as to achieve excellent refining effect and improve Yield, the effect of reducing investment

Inactive Publication Date: 2015-12-23
广州市正德生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of physical refining is that dephosphorization is often not complete, and it is not easy to remove metal ions contained in oil. It is easy to produce color reversion
However, since the physical refining process is only applicable to the processing of palm oil with low gum content and low acid value, for rapeseed oil, soybean oil, corn oil and other palm oils with high phosphorus content, high acid value, especially high non-hydratable phospholipid For seed oil, there is no economical and reliable dephosphorization process for physical refining. In order to achieve the necessary dephosphorization effect, chemical refining process is basically used.

Method used

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  • Edible plant oil non-soap refining method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Raw materials: Crude soybean oil extracted from Zhizhiyuan Oil Factory in Nansha, Guangdong, acid value 1.69mgKOH / g, phosphorus content 319ppm, color red 7.0 / yellow 60.

[0041] Miscellaneous degumming process:

[0042] The crude soybean oil extracted at room temperature (impurity 99.5%; Add alkali and hot water (85 ℃), add alkali amount to add citric acid content 0.3~0.8 times, with No soap stock is produced; add hot water with an amount twice the weight of phospholipids, after adding water, pass through a plate heat exchanger for heat exchange and cooling, and the water-oil mixture cooled to 30°C enters the flocculation reaction tank. The flocculation reaction tank is equipped with a stirrer with a rotation speed of 35 rpm, and the residence time of the flocculation reaction is 90 minutes. It is pumped out through the discharge pump of the flocculation reaction tank, the reaction mixture is exchanged with the mixture entering the flocculation reaction tank through a ...

Embodiment 2

[0053] Raw material: Crude corn oil leached from Shandong Sanxing Corn Industry Technology Co., Ltd., acid value 4.65mgKOH / g, phosphorus content 306ppm, color red 6.5 / yellow 65.

[0054] Miscellaneous degumming process:

[0055] Extract crude corn oil (containing impurities 99.2%; add alkali and hot water (90 ° C), the amount of alkali added is 0.5 to 0.9 times the content of phosphoric acid added, so as not to produce The soap foot shall prevail; add hot water with an amount of 1.5 times the weight of phospholipids, after adding water, pass through a plate heat exchanger for heat exchange and cooling, and the water-oil mixture cooled to 33°C enters the flocculation reaction tank. The flocculation reaction tank is equipped with a stirrer with a rotation speed of 40 rpm, and the residence time of the flocculation reaction is 75 minutes. It is pumped out through the discharge pump of the flocculation reaction tank, and the reaction mixture is exchanged with the mixture entering...

Embodiment 3

[0066] Raw materials: wool cottonseed oil pressed by Shandong Baizheng Biotechnology Co., Ltd., acid value 1.37mgKOH / g, phosphorus content 237ppm, color red 5.5 / yellow 30.

[0067] Miscellaneous degumming process:

[0068]Pressed wool cottonseed oil (impurity 99.6%; Add alkali and hot water (83 ° C), and the amount of alkali added was 0.6 to 0.9 times the phosphoric acid content, so as not to produce soap The foot shall prevail; add hot water with an amount of 1.7 times the weight of phospholipids, after adding water, heat exchange and cooling through a plate heat exchanger, and the water-oil mixture cooled to 35°C enters the flocculation reaction tank. The flocculation reaction tank is equipped with a stirrer with a rotation speed of 45 rpm, and the residence time of the flocculation reaction is 60 minutes. It is pumped out through the discharge pump of the flocculation reaction tank, the reaction mixture is exchanged with the mixture entering the flocculation reaction tank...

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Abstract

The invention relates to an edible plant oil non-soap refining method. The method comprises the following steps: 1, dephosphorizing and removing impurities: adding water to crude oil, carrying out a hydration reaction, separating hydratable phospholipids obtained after the reaction, adding an acid to acidify the hydratable phospholipids in the crude oil, adding an alkali and water, carrying out a flocculation reaction, centrifuging, and carrying out vacuum solvent removal drying on obtained light phase isolates to obtain dephosphorized oil; 2, decoloring: heating the dephosphorized oil, pre-decoloring through allowing a filter to be in contact with a primary decolored decoloring adsorbent filter cake, allowing the pre-decolored crude oil to enter a decoloring reaction pot and to be mixed with a decoloring adsorbent in order to carry out secondary decoloring, and filtering through the filter to obtain decolored oil; and 3, depickling and deodorizing: heating the decolored oil, allowing the heated decolored oil to enter a combined deodorizing tower, decoloring and depickling, allowing the decolored and depickled oil to enter a post-depickling tower, post-depickling, cooling, and carrying out fine filtration to obtain product oil. No soap stocks are generated in the edible plant refining process, so the method is suitable for processing all oil products, especially oils with high phosphorus content and high acid value.

Description

technical field [0001] The invention relates to the field of food processing, in particular to a soap-free refining method of edible vegetable oil. Background technique [0002] Crude oil is obtained from oil crops by pressing, leaching, etc. Crude oil contains the following impurities: suspended impurities (such as sediment, cake residue and other solid impurities), peptized impurities (mainly phospholipids), oil-soluble impurities (mainly free fatty acids , pigments, etc.) and moisture. The existence of suspended impurities, peptized impurities and water in crude oil is conducive to the activity of microorganisms and makes the oil hydrolyzed and rancid. The presence of phospholipids in crude oil makes the appearance turbid and dull, and it is easy to carbonize during cooking. If the content of free fatty acids is too high, the oil will be easily oxidized and have a peculiar smell and poor flavor. Bad pigments will make the oil darker or even black. In order to obtain pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B3/02C11B3/16
Inventor 俞正平
Owner 广州市正德生物科技有限公司
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