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Co-production method of okra seed oil and caffeine

A technology for okra seeds and caffeine, which is applied in the field of co-production of okra seed oil and caffeine, can solve the problems of low yield, high impurity content, hinder the dissolution of caffeine, etc., so as to improve extraction efficiency and content, improve extraction efficiency, and increase extraction efficiency. effect of ability

Inactive Publication Date: 2016-11-09
HUNAN UNIV OF ARTS & SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The extraction process of caffeine in okra seeds mainly includes microwave and ultrasonic assisted ethanol aqueous solution extraction. Due to the existence of oil hinders the dissolution of caffeine, this process has the disadvantages of low yield (less than 0.15%) and high impurity content.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] (1) 200 g of okra seeds were air-dried at 55°C, the dried okra seeds were crushed, passed through a 50-mesh sieve, and put into an ultrasonic-assisted-supercritical extraction kettle;

[0015] (2) Introduce supercritical CO into the ultrasonic-assisted-supercritical extraction kettle 2 , turn on the ultrasonic device, the extraction temperature in the extraction kettle is 25°C, the pressure is 30MPa, CO 2 The flow rate is 10L / h, the power of the ultrasonic device is 200W, and the extraction time is 0.5h; then the extract enters the separation kettle, the pressure of the separation kettle is controlled to be 5MPa, and the temperature is 30°C to collect the okra seed oil. The yield of the okra seed oil is 19.2%;

[0016] (3) After the seed oil is extracted, close the valve of the separation kettle, open the valves of the extraction kettle and the rectification tower, and turn on the ultrasonic device at the same time. The power of the ultrasonic device is 200W, and the p...

Embodiment 2

[0019] (1) 200 g of okra seeds were air-dried at 75°C, the dried okra seeds were crushed, passed through a 60-mesh sieve, and put into an ultrasonic-assisted-supercritical extraction kettle;

[0020] (2) Introduce supercritical CO into the ultrasonic-assisted-supercritical extraction kettle 2 , turn on the ultrasonic device, the extraction temperature in the extraction kettle is 65°C, the pressure is 10MPa, CO 2 The flow rate is 50L / h, the ultrasonic power is 800W, and the extraction time is 3.0h; then the extract enters the separation kettle, the pressure of the separation kettle is controlled at 10MPa, the temperature is 45°C, and the okra seed oil is collected. The yield of the okra seed oil is 19.3 %;

[0021] (3) After the seed oil extraction is completed, close the valve of the separation kettle, open the valves of the extraction kettle and the rectification tower, and turn on the ultrasonic device. The power of the ultrasonic device is 800W, and the pressure of the rec...

Embodiment 3

[0024] (1) 200 g of okra seeds were air-dried at 65°C, the dried okra seeds were crushed, passed through a 55-mesh sieve, and put into an ultrasonic-assisted-supercritical extraction kettle;

[0025] (2) Introduce supercritical CO into the ultrasonic-assisted-supercritical extraction kettle 2 , turn on the ultrasonic device, the extraction temperature in the extraction kettle is 40°C, the pressure is 20MPa, CO 2 The flow rate is 30L / h, the ultrasonic power is 500W, and the extraction time is 2.0h; then the extract enters the separation kettle, the pressure of the separation kettle is controlled at 8MPa, the temperature is 40°C, and the okra seed oil is collected. The yield of the okra seed oil is 19.5 %;

[0026] (3) After the seed oil extraction is completed, close the valve of the separation kettle, open the valves of the extraction kettle and the rectification tower, and turn on the ultrasonic device. The power of the ultrasonic device is 500W, and the pressure of the rect...

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Abstract

The invention provides a co-production method of okra seed oil and caffeine. The co-production method comprises the steps that 1, dry okra seeds are crushed, sieved and then contained in an ultrasonic-assisted-supercritical extraction kettle; 2, supercritical CO2 is introduced into the extraction kettle, an ultrasonic device is started, extractive matter enters a separation kettle, and the extracted seed oil is collected; 3, after seed oil extraction is completed, a valve of the separation kettle is switched off, valves of the extraction kettle and a rectifying tower are switched on, the ultrasonic device is started, the pressure and temperature of the rectifying tower are controlled, and supercritical CO2 and a 75%-95% ethyl alcohol cosolvent are mixed for circulating extraction; 4, a supercritical solution obtained after extraction enters the rectifying tower to be separated, caffeine is collected from the uppermost-layer area of the rectifying tower and then subjected to vacuum drying, the yield of the seed oil reaches 19% or above, and the yield of caffeine reaches 0.5% or above. According to the method, the supercritical extraction process is enhanced through ultrasonic assistance, therefore, the extraction efficiency is improved, and efficient co-production of the okra seed oil and caffeine is achieved.

Description

technical field [0001] The invention belongs to the technical field of biological separation, and in particular relates to a co-production method of okra seed oil and caffeine. Background technique [0002] The shape of okra seeds is similar to that of mung beans, and it is rich in a variety of unsaturated fatty acids needed by the human body. Its oil content is as high as 20%, and it can be developed as a new type of oil resource. At present, the extraction method of oil in okra seeds is mainly solvent extraction, such as petroleum ether-n-hexane, ethyl acetate, acetone, etc., but this method has problems such as low extraction efficiency, residual organic solvents, and impure oil. In order to solve the problem of organic solvent residue, Chinese patent technology CN104498179A (a method for extracting okra seed oil) and CN101703539A (a method for extracting okra seed oil with supercritical carbon dioxide) have announced the method for extracting okra seed oil using supercri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B1/04C11B1/10C11B3/00C11B3/12C07D473/12
CPCC07D473/12C11B1/04C11B1/104C11B1/106C11B3/00C11B3/12Y02P20/54
Inventor 邓爱华彭友林王云谢鹏李婷杨洁
Owner HUNAN UNIV OF ARTS & SCI
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