CN1068375C

CN1068375C - Supercritical CO2 extraction process of samara oil

Info

Publication number: CN1068375C
Application number: CN98123528A
Authority: CN
Inventors: 任引哲
Original assignee: 张连水
Priority date: 1998-10-07
Filing date: 1998-10-07
Publication date: 2001-07-11
Anticipated expiration: 2018-10-07
Also published as: CN1250081A

Abstract

The present invention relates to a supercritical extraction method for samara oil by CO2. Firstly, samara kernels are pulverized into the powder of 1.2 to 2.0mm; then the powder is extracted by CO2 as an extracting agent under a supercritical state; the extraction pressure is from 22 to 35MPa, and the extraction temperature is from 35 to 65DEG C; the mixture after extraction is decompressed to 100 to 150Kpa and cooled to 20 to 30DEG C; CO2 is separated from samara oil; then the CO2 is pressurized and heated to a supercritical state for cyclic usage. The present invention has the advantages of no residual CO2 in the obtained samara oil, low cost, no three wastes and simple operation.

Description

The method of CO 2 supercritical extracting samara oil

The present invention relates to a kind of CO ₂The method of supercritical extraction samara oil.

Shanxi Normal University's journal (natural science edition) (Vol, 11, No1,1997) discloses a kind of method with the solvent extraction samara oil, and extraction agent is an acetone.Sherwood oil or cyclohexane, after three grades of fragmentations, extraction is 8 hours about 40 ℃, and percentage extraction is about 90%.The fatal shortcoming of this law is residual in the product the deleterious extraction agent of pair person to be arranged, and does not reach the desired hygienic standard of oral liquid.In addition, this method is separated difficult, easily loses the effective active component in the oil, complicated operation.

The objective of the invention is to develop a kind of easy to operate, can effectively keep the method that its active ingredient and product do not have the residual CO 2 supercritical extracting samara oil of extraction agent.

Method steps of the present invention is as follows:

1. samara kind benevolence is crushed to 1.2-2.0mm:

2. with CO ₂For extraction agent (purity＞95%), under supercritical state, extract, extracting pressure is 22-35MPa; Collection duty temperature is 35-65 ℃;

3. after the extraction, be decompressed to 100-150Kpa, temperature is reduced to 20-30 ℃, CO ₂Thoroughly separate with samara oil;

4. the CO after separating ₂The above-mentioned supercritical state of heating recycles.

The embodiments of the invention accompanying drawings is as follows:

Fig. 1 is CO of the present invention ₂The laboratory test schematic flow sheet of supercritical extraction samara oil.

As shown in the figure, 1 is CO ₂Gas cylinder, 2 is CO ₂Basin, 3 is CO ₂Pump, 4 for giving hot device, and 5 is under meter, and 6 is extractor, and 7 is separator, 8 is condenser.

As shown in the figure: during extraction, to desired particle size, the extractor 6 of packing into feeds CO with raw material pulverizing ₂Make system pressure reach balance; The temperature of each equipment controls to temperature required with water-bath; Close the extractor outlet valve, open CO ₂High-pressure pump 3; CO ₂Enter preheater 4 by 1 through 3, be preheating to extraction temperature, enter extractor 6 through under meter 5; After keeping regular hour and pressure, will contain the CO of oil ₂Enter into separator 7; Regularly from separator 7, emit oil and measure, and CO ₂Return basin 2 through condenser 8, finish CO ₂Recycle.

The conspicuous effect of the inventive method is as follows:

(1) extraction agent of noresidue in the product is because of CO ₂Be gas at normal temperatures and pressures, separate fully that product meets export standard fully with product;

(2) the no three wastes, CO ₂Tasteless nontoxic, recycle again after the extraction, whole process of production does not have any three wastes and produces; Residue after the gained extraction is a crude protein, all used as fodder;

(3) CO ₂Cheap and easy to get, separate easily, so it is product cost is low, simple to operate.

Embodiment

(1) take by weighing the decorporate samara seed of crust of 5.0Kg, be crushed to the particle that granularity is 1.2-2mm, the extractor 6 of packing into cuts out the extractor outlet valve; Open the valve of gas cylinder 1, pump into CO ₂, pressure is heated to 35 ℃ to 21MPa with water-bath, and extracting 4 hours will contain oily CO ₂Enter separator 7 and separate, oil is emitted back weighing analysis, CO ₂Return basin and recycle, get oily 1.8Kg, meet export requirement according to the QB721-79 standard test;

(2) method is same, just changes extracting pressure into 35MPa, and temperature changes 65 ℃ into, gets product 1.9Kg.

Claims

1. CO ₂The method of supercritical extraction samara oil is characterized in that earlier samara kind benevolence being crushed to 1.2-2.0mm, again with CO ₂Be extraction agent, extract in supercritical state that extracting pressure is 22-35MPa, extraction temperature is 35-65 ℃, and the mixture after the extraction is depressurized to 100-150Kpa, is cooled to 20-30 ℃ of CO ₂Samara oil separates, and then with CO ₂Pressurization warming chamber supercritical state recycles.