Method for preparing acidic oil by using soapstock

A technology of acidified oil and soapstock, which is applied in the field of preparing acidified oil by using soapstock, can solve the problems of increasing costs, polluting the environment with acidified wastewater, affecting the treatment and utilization of acidified oil, and achieving the goals of reducing sewage, saving production costs, and reducing consumption Effect

Inactive Publication Date: 2019-04-02
嘉里粮油(营口)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the acidified wastewater separated during the acidified oil production process is very polluting, and must undergo a series of sewage treatment to meet the discharge standards, which increases a lot of costs
[0003] Excessive phospholipid content in acidified oil will affect the subsequent treatment and utilization of acidified oil. At present, the quality requirements of acidified oil are getting higher and higher, and the content of phospholipid must be reduced. The traditional production process of acidified oil can only increase the amount of sulfuric acid and Acidification step to reduce phospholipid content, which means more acidified wastewater polluting the environment

Method used

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  • Method for preparing acidic oil by using soapstock

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Heat the soapstock to 90°C, add 30kg of sulfuric acid with a mass fraction of 92.8% to 1 ton of soapstock for primary acidification, precipitate and separate the upper layer of grease to obtain primary acidified oil; heat the primary acidified oil to 90°C, 15 kg of sulfuric acid with a mass fraction of 92.8% was added to the oil for secondary acidification, and the upper layer of oil was precipitated and separated to obtain the acidified oil of this embodiment. In this example, 105 kg of sulfuric acid with a mass fraction of 92.8% was used to produce 1 ton of acidified oil.

Embodiment 2

[0019] Heat the soapstock to 90°C, add 30kg of sulfuric acid with a mass fraction of 92.8% to 1 ton of soapstock for primary acidification, precipitate and separate the upper layer of grease to obtain primary acidified oil; heat the primary acidified oil to 90°C, 30 kg of sulfuric acid with a mass fraction of 92.8% was added to the oil for secondary acidification, and the upper layer of oil was precipitated and separated to obtain the acidified oil of this embodiment. In this example, 120 kg of sulfuric acid with a mass fraction of 92.8% was used to produce 1 ton of acidified oil.

Embodiment 3

[0021] Heat the soapstock to 90°C, add 30kg of sulfuric acid with a mass fraction of 92.8% to 1 ton of soapstock, and carry out the initial acidification reaction with the acid water in the lower layer obtained after the secondary acidification reaction in Example 2, precipitate and separate the upper layer of oil to obtain the primary acidified oil Heat the primary acidified oil to 90°C, add 22 kg of sulfuric acid with a mass fraction of 92.8% to 1 ton of the primary acidified oil for secondary acidification, precipitate and separate the upper layer of oil to obtain the acidified oil of this embodiment. In this example, 112kg of sulfuric acid with a mass fraction of 92.8% was used to produce 1 ton of acidified oil.

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Abstract

The invention provides a method for preparing acidic oil by using soapstock. The preparation method comprises the following steps: heating soapstock to 88-92 DEG C, adding an acid and acid water to carry out a primary acidification reaction, and carrying out separation to obtain primary acidic oil; and heating the primary acidic oil to 88-92 DEG C, adding concentrated sulfuric acid to carry out asecondary acidification reaction, and carrying out separation to obtain the acidic oil, wherein the acid water is acidic water obtained by separation after the secondary acidification reaction. According to the method for preparing the acidic oil by using the soapstock, the content of phospholipid in the acidic oil can be directly reduced through the secondary acidification reaction, and the usageamount of the acid in the primary acidification reaction is reduced, so that the generation amount of acidification wastewater is reduced; the concentrated sulfuric acid is added in the secondary acidification reaction, and the generated acid water is reused in the primary acidification reaction, so that the usage amount of sulfuric acid and water can be reduced again; the acidification wastewater obtained after the primary acidification reaction does not need to be treated with addition of alkali liquor, so that generation of sewage is further reduced, and production cost is saved. The method can be widely applied to industrial production of acidic oil, and is economic and environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of acidified oil production, and more specifically, relates to a method for preparing acidified oil from soapstock. Background technique [0002] Soapstock is a by-product produced in the process of crude oil alkali refining in edible vegetable oil processing enterprises, and is the main raw material for the production of acidified oil. Useful components of acidified oils are free fatty acids and neutral oils. Production of acidified oil from oil and / or soapstock is the conversion of saponifiable matter in oil and soapstock into free fatty acids and separation along with neutral oil. Alkaline soaps and phospholipids need to be converted into free fatty acids through acidification, and then separated before they can be used. At present, the traditional method of producing acidified oil by using oil foot and soapstock is to add sulfuric acid to acidify alkali soap and phospholipid to generate free fatty acid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B13/02
CPCC11B13/02Y02W30/74
Inventor 孟令杰安芋兴张再勇张宏荣
Owner 嘉里粮油(营口)有限公司
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