CN1167776C

CN1167776C - Application of CO2 supercritical extraction technique to extract rose oil

Info

Publication number: CN1167776C
Application number: CNB011334541A
Authority: CN
Inventors: 佟步云; 苏珣
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-11-16
Filing date: 2001-11-16
Publication date: 2004-09-22
Anticipated expiration: 2021-11-16
Also published as: CN1353177A

Abstract

The present invention relates to a method for extracting rose oil by applying a CO2 supercritical extraction technique, which mainly comprises the four parts of compressure of supercritical fluid, extraction, decompression and separation. The present invention is characterized in that the rose oil can be extracted at low temperature, and an organic solvent is not used; the whole working process is masked in the inert atmosphere of CO2, the oxidation and the degradation of the rose ingredients are effectively prevented so that the effective ingredients are not damaged, and all the rose ingredients can be selectively separated and kept. The technique has the advantages of integral combination of extraction and separation no phase transition process of materials, no need of high temperature heating and solvent recycle, convenient operation, greatly shortened process flow, low extraction cost, no pollution, no poisoning and energy consumption economization; the collection rate of the rose oil can achieve more than 3%.

Description

Use CO 2Supercritical extraction technique to extract rose oil

Technical field: the present invention relates to a kind of application CO ₂The method of supercritical extraction technique to extract rose oil exactly is exactly the CO that utilizes under the super critical condition ₂Gas is made extraction agent, from roseleaf with the purification techniques of rose oil and other component separating.

Background technology: rose oil is a kind of special natural essence, and it is used for the external application and the cosmetics of super quality more.Extracting the rose oil common method in the prior art is solvent method, and it exists, and yield is low, the insufficient shortcoming of component.

Summary of the invention: the deficiency that the objective of the invention is to remedy above-mentioned technology, and provide a kind of method of the CO2 of application supercritical extraction technique to extract rose oil to people, this method can be extracted in low temperature, and not with an organic solvent, also can not separate and keep the method for the extraction rose oil of whole rose compositions selectively.The principle of supercritical fluid extraction sepn process is to utilize the dissolving power of supercritical liq and the relation of its density, promptly utilizes pressure and temperature that the influence of supercutical fluid dissolving power is carried out.Under supercritical state, supercritical liq is contacted with material to be separated, it is extracted the composition of polarity size, boiling point height and molecular weight size selectively successively.Certainly, the resulting extract of corresponding each pressure range can not be single, but the mixing composition that can control condition obtains optimum proportion, method by decompression, intensification makes supercutical fluid become common gases then, being extracted material then separates out fully or substantially, separate the purification purpose thereby reach, so the extraction of supercritical fluid extraction process combines with separating.Use CO ₂Supercritical extraction technique to extract rose oil, its method mainly are made up of four parts, and the one, the compression of supercutical fluid, the 2nd, extraction, the 3rd, decompression, the 4th, separate.

Its concrete method steps is as described below:

1, be half-dried with the roseleaf drying, moisture controlled is at 20%-30%;

2, half-dried roseleaf is put into extractor, this extractor is a high-pressure closed vessel;

3, with CO ₂(gas or liquid) is input to gaseous form that pressure space boosts and constant temperature, and its extraction conditions is 20MPa-40MPa, and temperature is 30 ℃-45 ℃, and the time is 2-4 hour, makes it become supercutical fluid under the operational condition, and feeds in the extractor;

4, in extractor, the soluble constituent in the raw material is dissolved in the supercutical fluid, and together enters separator after the step-down of process reducing valve in company with supercutical fluid;

5, at high-pressure closed vessel, promptly in the separator, solute separates from gas and takes out, the CO of Xie Ronghou ₂But gas recirculation is used.

Characteristics of the present invention are: (1) supercutical fluid is to be under high-density that supercritical state has, the low viscosity condition at gas-solvent to extract effective constituent, by the method for step-down solvent and solute are separated then, therefore have extraction and distillation dual function, with short production cycle, efficient is high.(2) it can extract rose oil in low temperature, and not with an organic solvent, entire work process is shrouded at CO ₂In the inert atmosphere, prevent oxidation of rose composition and degraded effectively, effective constituent is not destroyed, and can separate and keep whole rose compositions selectively.(3) utilize control pressure to make to be dissolved in the solute precipitation in the supercutical fluid and separate, therefore pollution-free, toxicological harmless, and capable of reducing energy consumption.(4) one is got, is located away to this technology treasury, do not have the phase transition process of material, do not need heat, need not reclaim solvent, easy to operate, shortened technical process greatly, reduces cost energy efficient.(5) its rose oil is collected rate and can be reached more than 3%.

Description of drawings:

Fig. 1 is a process flow sheet of the present invention.

Specific embodiment:

With reference to Fig. 1, use CO ₂The method steps of supercritical extraction technique to extract rose oil mainly is made up of four parts, and the one, the compression of supercutical fluid, the 2nd, extraction, the 3rd, decompression, the 4th, separate.Its concrete method steps is as described below:

1, be half-dried with the roseleaf drying, moisture controlled is at 20%-30%;

3, with CO ₂(gas or liquid) is input to gaseous form that pressure space boosts and constant temperature, and its extraction conditions is 30MPa, and temperature is 40 ℃, and the time is 4 hours, makes it become supercutical fluid under the operational condition, and feeds in the extractor;

4, in extractor, the soluble constituent in the raw material is dissolved in the supercutical fluid, and together enters separator through decompression after readding step-down in company with supercutical fluid;

Claims

1, uses CO ₂Supercritical extraction technique to extract rose oil is characterized in that: extracting method mainly is made up of four parts, and the one, the compression of supercutical fluid, the 2nd, extraction, the 3rd, decompression, the 4th, separate, its concrete method steps is as described below:

(1) be half-dried with the roseleaf drying, moisture controlled is at 20%-30%;

(2) half-dried roseleaf is put into extractor, this extractor is a high-pressure closed vessel;

(3) with CO ₂Be input to gaseous form that pressure space boosts and constant temperature, its extraction conditions is 20Mpa-40Mpa, and temperature is 30 ℃-45 ℃, and the time is 2-4 hour, makes it become supercutical fluid under the operational condition, and feeds in the extractor;

(4) in extractor, the soluble constituent in the raw material is dissolved in the supercutical fluid, and together enters separator after the step-down of process reducing valve in company with supercutical fluid;

(5) at high-pressure closed vessel, promptly in the separator, solute separates from gas and takes out, the CO of Xie Ronghou ₂But gas recirculation is used.