A method for decolorizing acidified oil by using compound decolorizing agent

A technology for acidifying oil and decolorizing agent, which is applied in the direction of oil/fat refining, fat production, etc., can solve the problems of expensive operation cost and insignificant decolorization effect, and achieves the effects of convenient measurement, low price, and safe and reliable method.

Active Publication Date: 2018-03-13
中国-阿拉伯化肥有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Known disclosed methods for decolorizing acidified oil include: adding activated carbon or white clay, etc. Although this type of decolorizing method has a certain decolorizing effect on acidified oil, the decolorizing effect is not obvious, and the operation cost is expensive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A method for decolorizing acidified oil by using a compound decolorizing agent, comprising the following steps:

[0024] (1) Heat 50mL of undecolorized commercially available acidified oil to 70-80°C and keep the temperature constant;

[0025] (2) Add 1.5mL of 25% by volume ammonia water dropwise to the acidified oil under a constant temperature environment, then add 0.1g of iron powder and 0.05g of aluminum powder, after stirring evenly, add 8mL of 30% by volume of hydrogen peroxide dropwise, at 70-80°C Next, stir and decolorize for 70 minutes;

[0026] (3) Cool the decolorized acidified oil to room temperature to obtain the decolorized acidified oil product 1 .

[0027] The absorbance of the obtained acidified oil product 1 was measured with a spectrophotometer, and the maximum absorption wavelength was 665 nm, and the decolorization rate reached 85%.

Embodiment 2

[0029] A method for decolorizing acidified oil by using a compound decolorizing agent, comprising the following steps:

[0030] (1) Heat 50mL of undecolorized acidified oil to 70-80°C and keep the temperature constant;

[0031] (2) Add dropwise 1mL of 5% by volume ammonia water to the acidified oil under a constant temperature environment, then add 0.05g of iron powder and 0.1g of aluminum powder, after stirring evenly, add 15mL of 30% by volume of hydrogen peroxide dropwise, at 70-80°C Next, stir and decolorize for 80 minutes;

[0032] (3) Cooling the decolorized acidified oil to room temperature to obtain decolorized acidified oil product 2.

[0033] The absorbance of the obtained acidified oil product 2 was measured with a spectrophotometer, the maximum wavelength was 665nm, and the decolorization rate reached 84%.

Embodiment 3

[0035] A method for decolorizing acidified oil by using a compound decolorizing agent, comprising the following steps:

[0036] (1) Heat 50mL of undecolorized acidified oil to 70-80°C and keep the temperature constant;

[0037] (2) Add 2mL of 25% by volume ammonia water dropwise to the acidified oil under a constant temperature environment, then add 0.15g of iron powder and 0.15g of aluminum powder, and after stirring evenly, add 10mL of 30% by volume of hydrogen peroxide dropwise, at 70-80°C Next, stir and decolorize for 40 minutes;

[0038] (3) Cool the decolorized acidified oil to room temperature to obtain the decolorized acidified oil product 3 .

[0039] The absorbance of acidified oil product 3 was measured by spectrophotometry, the maximum wavelength was 665nm, and the decolorization rate reached 82%.

[0040] The method provided by the invention is simple in operation and low in cost, and the color of the acidified oil processed by the method changes from black to b...

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Abstract

The invention relates to a method for decolorizing acid oil with a compound decolorizing agent. The method comprises the following steps: (1) heating acid oil which is not decolorized to 70-80DEG C, and keeping the temperature constant; (2) adding the following materials into the acid oil in sequence in a constant-temperature environment: 25vol% of ammonium hydroxide, iron powder, aluminum powder and 30vol% of hydrogen peroxide, wherein the addition amount of ammonium hydroxide is 1-5 percent of the weight of the acid oil, the addition amount of iron powder is 0.1-0.5 percent of the weight of the acid oil, addition amount of aluminum powder is 0.1-0.3 percent of the weight of the acid oil addition amount of hydrogen peroxide is 10-30 percent of the weight of the acid oil; then performing stirring and decolorizing for 40-80min at 70-80DEG C; and (3) cooling the decolorized acid oil to room temperature to obtain finished decolorized acid oil. The method provided by the invention is simple to operate and low in cost, and the acid oil processed by the method changes from black into bright yellow and is greatly improved in luster and transparency. According to the method, the external color of the acid oil is greatly improved while the quality of the acid oil is guaranteed so as to provide a good example for comprehensive utilization of the acid oil.

Description

technical field [0001] The invention relates to a method for decolorizing acidified oil, in particular to a method for decolorizing acidified oil by using a composite decolorizing agent. Background technique [0002] Acidified oil refers to the oil obtained by acidifying soapstock, a by-product produced in oil refineries. Acidified oils are mainly composed of fatty acids, and contain various components such as pigments and unacidified triglycerides. Among them, the soap content is about 25-30%, the neutral oil content is 12-25%, and the total fatty acid content is 40-50%. These substances have their special uses in agricultural production, but because the treatment of soapstock often uses industrial sulfuric acid, resulting in Acidified oleic acid has a high acid value and a dark brown color, which is greatly restricted in production and application. [0003] Chromaticity is one of the important properties of acidified oil, and its color directly affects the quality and ap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C11B3/02
CPCC11B3/02
Inventor 宋安新
Owner 中国-阿拉伯化肥有限公司
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