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Method for extracting linseed oil with supercritical CO2

A linseed oil, supercritical technology, applied in the direction of fat oil/fat production, fat oil/fat refining, fat production, etc., can solve the limited problems, and achieve the effects of mature technology, high yield and good economic value

Inactive Publication Date: 2014-12-10
PUYANG TIANXINGJIAN BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the process is still in the stage of experimental exploration, there is still a long distance from the actual popularization and utilization.
[0005] In recent years, supercritical CO 2 Extraction technology has been widely promoted because of its advantages of high extraction efficiency, no organic pollution, and high safety. In the prior art, about supercritical CO 2 There have been many related studies on the extraction of linseed oil, but the relatively mature supercritical CO 2 Methods for extracting linseed oil are still limited

Method used

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  • Method for extracting linseed oil with supercritical CO2
  • Method for extracting linseed oil with supercritical CO2

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Experimental program
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Effect test

Embodiment 1

[0027] Such as figure 1 , figure 2 Shown, the supercritical CO of the linseed oil provided by the present invention 2 The extraction method comprises preheating, extraction, first separation, second separation, and molecular distillation processes, specifically comprising the following steps:

[0028] (1) Select clean linseeds without shriveled or impurities, and grind them into 40-60 mesh;

[0029] (2) Put the crushed flaxseed in step (1) in the extraction kettle for supercritical CO 2 Extraction, the specific extraction process is:

[0030] First, preheat the extraction kettle to 40~45°C, then place the material in step (1) in the extraction kettle, and adjust the high-pressure CO into the extraction kettle. 2 Fluid pressure to 28~32MPa, stable for 2 hours;

[0031] Second, high pressure CO 2 The fluid carries the dissolved substances in the extraction kettle through the first preheater and enters the first separation kettle. The temperature of the first preheater is ...

Embodiment 2

[0045] The steps for preparing linseed oil in this embodiment are the same as in Example 1, only the clean linseed oil raw material is adjusted to 0.85Kg, and the 40-mesh pulverization process is performed.

[0046] During the extraction process, the temperature in the extraction kettle was preheated to 45°C, and the high-pressure CO in the extraction kettle 2 The fluid pressure is 30MPa, stable for 2 hours; the high-pressure CO with the extract in the first separation tank 2 The fluid pressure is 10MPa, the temperature of the first preheater is 50°C; the high-pressure CO with the extract in the second separation tank 2 The fluid pressure is 6MPa, and the temperature of the second preheater is 40°C.

[0047] Supercritical CO 2 After extraction, the finished product of linseed oil is obtained after further 5-stage molecular distillation.

[0048] This embodiment finally obtains 0.305Kg of linseed oil finished product, and the extraction rate is 37.6%. The extracted linseed oil...

Embodiment 3

[0050] The steps for preparing linseed oil in this embodiment are the same as in Example 1, only the clean linseed oil raw material is adjusted to 0.86Kg, and the 60-mesh pulverization process is performed.

[0051] During the extraction process, the temperature in the extraction kettle was preheated to 45°C, and the high-pressure CO in the extraction kettle 2 The fluid pressure is 32MPa, stable for 2 hours; the high-pressure CO with the extract in the first separation tank 2 The fluid pressure is 10MPa, the temperature of the first preheater is 50°C; the high-pressure CO with the extract in the second separation tank 2 The fluid pressure is 6MPa, and the temperature of the second preheater is 35°C.

[0052] Supercritical CO 2 After extraction, the finished product of linseed oil is obtained after further 5-stage molecular distillation.

[0053] This embodiment finally obtains 0.3Kg of linseed oil finished product, and the extraction rate is 37%. The extracted linseed oil i...

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Abstract

The invention belongs to the technical field of edible oil preparation and in particular relates to a method for extracting linseed oil with supercritical CO2. The method comprises the processes of preheating, extraction, primary separation, secondary separation and molecular distillation. The prepared linseed oil has bright orange-yellow color and has the special smell of linseeds. The total unsaturated fatty acids in the linseed oil are not less than 80%, and the content of linolenic acid in the linseed oil is not less than 57%. The method provided by the invention has the beneficial effects that in the extraction process, the technology is mature and is easy to operate; the pollutant discharge process does not exist in the whole production process, so that the method is environment-friendly; meanwhile, the method has the advantages of high yield, high purity, good quality of prepared linseed oil and the like; through further physiochemical index detection of the prepared linseed oil, the unsaturated fatty acid ingredients in the linseed oil are better retained, so that the linseed oil has better economic values.

Description

technical field [0001] The invention belongs to the technical field of edible oil preparation, in particular to a supercritical CO 2 extraction method. Background technique [0002] Existing studies have shown that flaxseed oil is rich in unsaturated fatty acids such as linolenic acid, linoleic acid, etc., as well as rich in biologically active substances such as phytosterols, amino acids, vitamins, minerals, etc., and has potential preventive heart disease. It has been widely praised for its health care effects on cerebrovascular diseases, regulating gout and rheumatism, and inhibiting thrombotic diseases, and is considered to be a better health-care edible oil. [0003] The extraction of linseed oil is mainly done by pressing method and solvent extraction method. Generally speaking, the pressing method retains the rich nutrients in the oil and is free from chemical solvent pollution, so it is considered to be the safest preparation method. A greater degree of restrictio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B1/10C11B3/00C11B3/12
Inventor 李少杰端木国民马现京
Owner PUYANG TIANXINGJIAN BIOTECH
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