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Method for extracting linseed oil by utilizing cold squeezing combined ultrasonic method

A technology of linseed oil and ultrasonic method, which is applied in the direction of fat oil/fat production and fat production, can solve the problem of low oil yield and achieve the effects of low cost, high nutritional value and low energy consumption

Inactive Publication Date: 2017-06-13
北京民幅农科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing method of extracting linseed oil is still based on physical pressing. Although it can effectively preserve the nutrients in the original linseed, its oil yield is low. How to preserve the original active ingredients of linseed? Improving the oil yield of linseed is an important issue in the process of extracting linseed oil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A method of cold pressing combined with ultrasonic method for extracting linseed oil in this embodiment is implemented according to the following steps:

[0024] S1: Wash and remove impurities from the linseed, dry at 40-48°C after cleaning, and then use mechanical peeling equipment to separate the linseed skin and linseed kernel;

[0025] S2: crushing the separated linseed kernels and passing through a 50-mesh sieve to obtain linseed kernel powder;

[0026] S3: Wrap the obtained linseed powder with a filter cloth, put it into an oil press for low-temperature pressing at 60°C, and obtain pressed linseed oil and cake;

[0027] S4: crushing the cake and passing through a 50-mesh sieve to obtain a powdery cake;

[0028] S5: Mix the powdery cake with the solvent at a mass ratio of 1:5, and perform secondary extraction under the action of ultrasonic waves, with ultrasonic power of 80W, extraction temperature of 50°C, and extraction time of 30 minutes;

[0029] S6: Filter t...

Embodiment 2

[0033] This example is a method for extracting linseed oil by cold pressing combined with ultrasonic method. The specific implementation steps are the same as in Example 1, except that the solvent is a mixture of water and n-hexane at a volume ratio of 50:1.

[0034] Carry out the mensuration of total oil by utilizing Soxhlet extraction method, utilize the formula to carry out the calculation of linseed oil extraction rate (free oil extraction rate (%)=total free oil / raw material total oil amount × 100%), calculate this implementation Under the conditions of the example, the extraction rate of linseed oil was 92.6%.

Embodiment 3

[0036] In this example, a method for extracting linseed oil by cold pressing combined with ultrasonic method, the specific implementation steps are the same as in Example 1, the only difference is that the solvent is mixed with water, n-hexane and ethanol according to the volume ratio of 50:5:1 Mixture.

[0037] Carry out the mensuration of total oil by utilizing Soxhlet extraction method, utilize the formula to carry out the calculation of linseed oil extraction rate (free oil extraction rate (%)=total free oil / raw material total oil amount × 100%), calculate this implementation Under the conditions of the example, the extraction rate of linseed oil was 98.2%.

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Abstract

The invention provides a method for extracting linseed oil by utilizing a cold squeezing combined ultrasonic method and belongs to the technical field of vegetable oil extraction. The method comprises the following steps: cleaning linseed and removing impurities; separating linseed skin from linseed kernels; smashing the linseed kernels; squeezing the smashed linseed kernel powder under low temperature at 40-80 DEG C, thereby acquiring the squeezed linseed oil and cake; and further secondarily extracting the cake according to an ultrasonic method. Twice extraction is performed under the low temperature condition through low-temperature squeezing and ultrasonic method, so that the content of the unsaturated fatty acid in the linseed kernels can be effectively maintained and the extracting yield of the linseed oil can be greatly promoted; the problem of low extraction efficiency of the traditional squeezing method can be solved; on the basis of increasing the extraction efficiency, the wax and the bitter taste in the linseed oil are reduced and the preparation cost is greatly lowered; the method is an improvement for the process of extracting linseed oil by utilizing the traditional squeezing method.

Description

technical field [0001] The invention belongs to the technical field of vegetable oil extraction, and in particular relates to a method for extracting linseed oil by cold pressing combined with an ultrasonic method. Background technique [0002] Linseed oil, also known as linseed oil or flax oil, is mainly composed of linolenic acid, linoleic acid, oleic acid, stearic acid, palmitic acid and other fatty acids, of which the content of linolenic acid is as high as 55%, so linseed oil is the world's One of the vegetable oils with the highest linolenic acid content. The linolenic acid in linseed oil belongs to α-linolenic acid. α-linolenic acid is an essential fatty acid for the human body every day. It is a core substance of life and an important component of human brain cells and tissue cells. Humans cannot synthesize flax by themselves Acid must be obtained from food or nutritional supplements. At the same time, linseed oil has a strong effect of increasing intelligence, pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B1/06C11B1/10
CPCC11B1/06C11B1/106
Inventor 章结兵曹长犬
Owner 北京民幅农科技有限公司
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