Walnut oil extraction method based on supercritical CO2

A carbon dioxide, supercritical technology, which is applied in the production of fat oil/fat, refining of fat oil/fat, and fat production. Active substances, improving extraction efficiency, preventing spoilage and rancidity

Inactive Publication Date: 2018-02-16
哈尔滨美森食品制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of low extraction efficiency, long extraction process time, short shelf life, and high nutritional loss in the extraction process in the existing extraction process, the present invention provides a method for extracting walnut oil with supercritical carbon dioxide, which can simplify the process and reduce the cost , The purpose of improving the quality of oil, the technical scheme adopted is as follows:

Method used

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  • Walnut oil extraction method based on supercritical CO2

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Effect test

Embodiment 1

[0026] The present embodiment provides a kind of method that supercritical carbon dioxide extracts walnut oil, and concrete method is:

[0027] 1. To obtain walnut kernels after shelling walnuts, freeze the walnut kernels in liquid nitrogen at -100°C for 7 minutes, and then thaw them in microwave at 75°C for 8 minutes to remove the skin; 60 mesh sieves, and then the walnut powder obtained is subjected to ultrasonic treatment for 12 minutes under the conditions that the ultrasonic power is 450W, the ultrasonic temperature is 32°C, and the ultrasonic frequency is 20KHz;

[0028] 2. Put the ultrasonically treated walnut powder into the supercritical CO 2 In the extraction kettle, in CO 2 The supercritical CO 2 Extract for 45min to obtain crude oil and cake;

[0029] 3. The crude oil is subjected to pulsed electric field treatment for 100 μs under the conditions of electric field strength of 20kV / cm, pulse frequency of 300Hz, and pulse flow rate of 50mL / min, and then undergoes ...

Embodiment 2

[0032] The present embodiment provides a kind of method that supercritical carbon dioxide extracts walnut oil, and concrete method is:

[0033] 1. Shell the walnuts to obtain walnut kernels, freeze the walnut kernels in liquid nitrogen at -120°C for 5 minutes, and then thaw them in microwave at 85°C for 5 minutes to remove the skin; 60-mesh sieve, then the obtained walnut powder was subjected to ultrasonic treatment for 8 minutes under the conditions that the ultrasonic power was 550W, the ultrasonic temperature was 39°C, and the ultrasonic frequency was 25KHz;

[0034] 2. Put the ultrasonically treated walnut powder into the supercritical CO 2 In the extraction kettle, in CO 2 The supercritical CO 2 Extract for 40min to obtain crude oil and cake;

[0035] 3. The crude oil is subjected to pulsed electric field treatment for 80 μs under the conditions of electric field strength of 25kV / cm, pulse frequency of 400Hz, and pulse flow rate of 70mL / min, and then undergoes ultrafin...

Embodiment 3

[0038] The present embodiment provides a kind of method that supercritical carbon dioxide extracts walnut oil, and concrete method is:

[0039] 1. To obtain walnut kernels after shelling walnuts, freeze the walnut kernels in liquid nitrogen for 5 minutes at -100°C, and then thaw them in microwave at 80°C for 6 minutes to remove the skin; 60 mesh sieve, then the walnut powder obtained is subjected to ultrasonic treatment for 10 min under the conditions that the ultrasonic power is 480W, the ultrasonic temperature is 37°C, and the ultrasonic frequency is 25KHz;

[0040] 2. Put the ultrasonically treated walnut powder into the supercritical CO 2 In the extraction kettle, in CO 2 The supercritical CO 2 Extract for 42min to obtain crude oil and cake;

[0041]3. The crude oil is subjected to pulsed electric field treatment for 90 μs under the conditions of electric field strength of 23kV / cm, pulse frequency of 340Hz, and pulse flow rate of 62mL / min, and then undergoes ultrafine f...

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Abstract

The invention discloses a walnut oil extraction method based on supercritical CO2 and belongs to the technical field of deep processing of walnut oil. The method comprises the following steps: walnutkernels are subjected to liquid nitrogen freezing treatment, microwave thawing, coat removal, superfine grinding treatment and screening, and then ultrasonic treatment is performed; supercritical CO2extraction is performed, crude oil is subjected to pulsed electric field treatment, and the walnut oil is obtained through ultrafiltration. The walnut oil obtained with the method better retains bioactive substances and has higher oxidation resistance, the shelf life is prolonged, deterioration and rancidity of the walnut oil during storage can be further prevented effectively, the shelf life is further prolonged effectively, and the method is high in extraction efficiency and short in process time. The method is applicable to processing and production of the walnut oil.

Description

technical field [0001] The invention relates to a method for extracting walnut oil with supercritical carbon dioxide, belonging to the technical field of walnut oil deep processing. Background technique [0002] The traditional methods of producing vegetable oil are mainly pressing and leaching. The pressing process is simple, less supporting equipment, and can maintain the special flavor of the product, but the oil extraction rate is low, energy consumption is high, and the cost is high. At the same time, it will destroy various nutritional and beneficial ingredients in walnuts, which greatly reduces the nutritional and health care value of walnut oil. , and the protein denaturation of the pressed cake is serious, and the protein utilization rate is low, resulting in a serious waste of vegetable protein. The leaching method has high production efficiency and low residual oil rate, but this method requires a lot of equipment, large investment, large loss of oil flavor and r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B1/10C11B1/04C11B3/00
CPCC11B1/04C11B1/104C11B3/001C11B3/005
Inventor 曹亮赵勇
Owner 哈尔滨美森食品制造有限公司
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