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a supercritical co 2 Method for extracting carnosic acid in rosemary leaves

A technology of carnosic acid and rosemary leaves, which is applied in the field of rosemary extraction, can solve the problems of poor quality, low yield and low purity of carnosic acid, and achieves the effect of improving efficiency and improving effect

Active Publication Date: 2022-08-05
湖南先伟阳光生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of low purity, low yield and poor quality of carnosic acid in rosemary leaves using supercritical extraction in the prior art, the present invention aims to provide a method for extracting carnosic acid using supercritical CO 2 The method for extracting carnosic acid in rosemary leaves uses dried rosemary leaves as raw materials, crushes and sieves them and puts them into an extraction kettle, and conducts low-pressure static extraction to make CO 2 Fully dissolve with the essential oil in the raw material, remove the volatile by-products of the essential oil by dynamic extraction, add a small amount of low-concentration alcohol for static extraction, and then add low-concentration alcohol in batches, the extract is graded into the separation tank and rectification column for purification, and the rectification column To obtain carnosic acid with a purity of more than 90%, the liquid released from the separation tank is decolorized and deodorized by nanofiltration membrane filtration, and after vacuum concentration, carnosic acid with a purity of more than 80% is obtained

Method used

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  • a supercritical co <sub>2</sub> Method for extracting carnosic acid in rosemary leaves
  • a supercritical co <sub>2</sub> Method for extracting carnosic acid in rosemary leaves
  • a supercritical co <sub>2</sub> Method for extracting carnosic acid in rosemary leaves

Examples

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Effect test

Embodiment 1

[0026](1) Weigh 1kg of rosemary dried leaves, pass through a 60-mesh sieve after pulverization, and load into an extraction kettle. access to CO 2 Maintain the pressure of 6MPa for static extraction for 1h, set the flow rate to 15kg / h, then adjust the extraction kettle pressure to 10MPa a, the extraction temperature to 35°C, and feed supercritical CO 2 Continuously circulating extraction for 3h; control the pressure in separation kettle 1 to 6MPa, temperature to 40°C, extraction time to be 2h, and release 44.8g of rosemary essential oil from the separation kettle;

[0027] (2) Depressurize the extraction kettle from which the essential oil has been extracted, take out the rosemary powder, add 0.4 times of alcohol with a concentration of 20wt%, mix well, seal and soak for 2h, put it into the extraction kettle, and feed CO 2 The static extraction was carried out under the pressure of 10MPa for 1h, and then the pressure was increased to 30MPa, the extraction temperature was 60℃,...

Embodiment 2

[0034] (1) Weigh 1kg of rosemary dried leaves, pass through an 80-mesh sieve after pulverization, and load into an extraction kettle. access to CO 2 Maintain the pressure of 6MPa for static extraction for 1h, set the flow rate to 15kg / h, then adjust the extraction kettle pressure to 25MPa a, the extraction temperature to 35°C, and feed supercritical CO 2 Continuously circulating extraction for 3h; control the pressure in the separation kettle 1 to 5MPa, the temperature to be 45°C, the extraction time to be 2h, and release 45.6g of rosemary essential oil from the separation kettle;

[0035] (2) Depressurize the extraction kettle from which the essential oil has been extracted, take out the rosemary powder, add 0.3 times of alcohol with a concentration of 30 wt %, mix well, seal and soak for 2 hours, put it into the extraction kettle, and feed CO 2 The static extraction was carried out under the pressure of 10MPa for 1h, and then pressurized to 45MPa, the extraction temperature...

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Abstract

The invention discloses a kind of supercritical CO 2 The method for extracting carnosic acid in rosemary leaves is to use rosemary dried leaves as raw materials, pulverize and sieve them and put them into an extraction kettle, and first low-pressure static extraction makes CO 2 It is fully dissolved with the essential oil in the raw material, the volatile by-products of the essential oil are removed by dynamic extraction, a small amount of low-concentration alcohol is added for static extraction, and then the low-concentration alcohol is pumped in batches. The column obtains carnosic acid with a purity of more than 90%, the effluent in the separation kettle is filtered through a nanofiltration membrane for decolorization and deodorization, and the carnosic acid with a purity of more than 80% is obtained after vacuum concentration.

Description

technical field [0001] The present invention relates to a kind of utilization of supercritical CO 2 A method for extracting carnosic acid in rosemary leaves belongs to the technical field of rosemary extraction. Background technique [0002] As a perennial herb of the Lamiaceae family, rosemary is widely used as a spice abroad. It has also been introduced in China in 1981 and is widely cultivated. Its main components are flavonoids, terpenes, phenols and other compounds. Rosemary extract has antioxidant, antibacterial, antitumor, antiseptic, anti-inflammatory, anti-cardiovascular disease and other effects. It is well known that meat products and oils are prone to oxidation and rancidity during processing and storage, while the synthetic antioxidants butylated hydroxyanisole (BHA), dibutylated hydroxytoluene (BHT) and tert-butylhydroquinone (TB) HQ) was found to have a certain toxic effect on the human body during use, so pure natural high-activity antioxidants have become ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C51/42C07C62/32C07C51/48
CPCC07C51/42C07C51/48C07C2603/26C07C62/32Y02P20/54
Inventor 罗伟欧阳华曹文豪
Owner 湖南先伟阳光生物科技有限公司