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Method for substituting washing wastewater of oil alkali refining for hydrated hot water

A waste water and alkali refining technology, applied in edible oil/fat, food science, application, etc., can solve problems affecting oil quality and refining economic benefits, affecting refining efficiency and product quality, increasing the burden of decolorization, etc., to achieve degumming effect and The effect of good oil quality, saving sewage treatment costs, and reducing the content of trans acid

Inactive Publication Date: 2010-06-16
NORTHEAST AGRICULTURAL UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The colloid in vegetable oil is mainly a mixture of phospholipids. Degumming is a very important process in vegetable oil refining. The degumming effect will directly affect the refining efficiency and product quality; if the degumming is not complete, it will increase the burden of decolorization and affect the quality of oil and refining. economic benefits
Vegetable oil phospholipids can be divided into hydratable phospholipids and non-hydratable phospholipids. The hydratable phospholipids are hydrophilic and can be removed by hydration methods, while the non-hydratable phospholipids have obvious hydrophobicity and are difficult to combine with water in hydration degumming. Combined, its presence will bring a lot of trouble to oil refining

Method used

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Experimental program
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Effect test

specific Embodiment approach 1

[0016] Specific implementation mode one: the steps of this implementation mode are as follows:

[0017] Step 1: The raw materials are heated up, the crude soybean oil is heated up to 75°C, and the alkali refining and washing wastewater is heated up to 85°C;

[0018] Step 2: Determination of the amount of washing wastewater added, adding washing wastewater to a certain amount of soybean crude oil respectively as 6%, 9%, 12%, 15%, and 18% of the raw material weight, at a certain temperature and stirring speed, Stir for a period of time to carry out degumming reaction, then centrifuge at 5000r / min for 15min, take 5g of degummed oil in the upper layer, measure its phosphorus content, and determine the amount of washing wastewater added;

[0019] Step 3: Determine the degumming time, add the optimum amount of washing wastewater to a certain amount of soybean crude oil, stir at a certain temperature, choose different degumming time, 15min, 20min, 25min, 30min, 35min, carry out the d...

Embodiment approach 2

[0022] Specific implementation method two: the difference between this implementation method and specific implementation method one is that adding washing wastewater in step two is 12%-15% of the raw material weight, and other compositions and steps are the same as specific implementation method one;

Embodiment approach 3

[0023] Concrete implementation method three: the difference between this implementation method and specific implementation method one is that different degumming time 25-30min is selected in step three, and other compositions and steps are identical with specific implementation method one;

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Abstract

The invention provides an oil degumming method and relates to research of directly applying washing wastewater to degumming in an oil alkali refining process. Hydrated phospholipid has hydrophilic property and can be removed through a hydration method, while non-hydrated phospholipid has obvious hydrophobic property, exists in a calcium magnesium salt form of phosphatidic acid (PA) and lysophosphatidic acid, and is difficult to remove. As the washing wastewater contains a certain amount of solution of sodium hydroxide, the washing wastewater is added into crude oil to improve the dissociation degree of the PA; the phospholipid in the calcium magnesium salt form is converted into phospholipid which is easy to hydrate; the washing wastewater of the alkali refining has PH of 9.14 and high temperature and is suitable for degumming; after the washing wastewater is used for the degumming, the content of degummed oil phosphorus is about 20 ppm; meanwhile, strong phosphoric acid is not added in the degumming process so as to avoid isomerization reaction of unsaturated double bond in the oil. The process of the invention has the characteristics that: the process reclaims the oil in the washing wastewater, saves 35 to 37 KJ of energy when producing each kilogram of product oil, and reduces the content of trans fatty acid in the oil.

Description

Technical field: [0001] The invention relates to the field of edible oil processing, in particular to a method for degumming the washing waste water during the alkali refining process of the oil for the degumming process. Background technique: [0002] The colloid in vegetable oil is mainly a mixture of phospholipids. Degumming is a very important process in vegetable oil refining. The degumming effect will directly affect the refining efficiency and product quality; if the degumming is not complete, it will increase the burden of decolorization and affect the quality of oil and refining. economic benefits. Vegetable oil phospholipids can be divided into hydratable phospholipids and non-hydratable phospholipids. The hydratable phospholipids are hydrophilic and can be removed by hydration methods, while the non-hydratable phospholipids have obvious hydrophobicity and are difficult to combine with water in hydration degumming. Combined, its presence can cause a lot of trouble...

Claims

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Application Information

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IPC IPC(8): A23D9/02
Inventor 王立琦魏贞伟于殿宇朱秀清李红玲王玉李振岚齐颖李默馨王腾宇
Owner NORTHEAST AGRICULTURAL UNIVERSITY
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