Process for producing pyrethrum through subcritical continuous extraction

A subcritical, pyrethrum technology, used in solid solvent extraction, biocides, biocides, etc., can solve the problems of many solvent recovery times, large differences in the quality of crude extracts, and long recovery time, so as to shorten the production cycle. , The effect of reducing the number of concentrated recovery and reducing production costs

Active Publication Date: 2011-04-06
YUNNAN NANBAO BIOTECH
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Problems solved by technology

[0007] In order to solve the problems in the prior art that when extracting the active ingredients of pyrethrum plant raw materials, there are too many solvent recovery times, the recovery time is l

Method used

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  • Process for producing pyrethrum through subcritical continuous extraction
  • Process for producing pyrethrum through subcritical continuous extraction
  • Process for producing pyrethrum through subcritical continuous extraction

Examples

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Embodiment

[0022] Embodiment: a kind of subcritical continuous extraction process of pyrethrum, the subcritical continuous extraction device used in this process is as figure 2 As shown, there are four extraction tanks, namely A tank, B tank, C tank and D tank. Each extraction tank is equipped with a liquid inlet pipe 1 and a liquid outlet pipe 2. On the liquid inlet pipe 1 and the liquid outlet pipe 2 Both are equipped with a stop valve 3, the liquid inlet pipe 1 on the extraction tank is connected with the solvent inlet pipe 4, the liquid outlet pipe 2 on the extraction tank is connected with the solvent outlet pipe 5, and the solvent inlet pipe 4 and the solvent outlet pipe 5 are connected. There is a main cut-off valve 6, and a solvent circulation pipe 8 is connected between the solvent inlet pipe 4 and the solvent outlet pipe 5, and the solvent circulation pipe 8 is equipped with a circulation valve 9 and a high-pressure pump 7;

[0023] The solvent used in this example is butane, ...

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Abstract

The invention provides a process for producing pyrethrum through subcritical continuous extraction, which belongs to the technical field of plant active ingredient extraction and solves the problems of excessive solvent extraction times in a pyrethrum extracting process and the like. An extraction device comprises four extraction pots, wherein a liquid inlet pipe and a liquid outlet pipe are arranged on each extraction pot; and a solvent circulating pipe is arranged between a solvent inlet pipe and a solvent outlet pipe. The continuous extraction process comprises a primary material extraction stage, a secondary material extraction and four stages, namely circulation stage I, circulation stage II, circulation stage III and circulation stage IV; an adopted solvent is in a subcritical state; dried flower raw materials of the pyrethrum are placed in the extraction pots; a new solvent is added from the solvent inlet pipe and is transferred to a concentration stage through the solvent outlet pipe after extraction; and the pasty extract in a concentration pot is the finished product. In the process of the invention, the solvent concentration and recirculation times are few; the production period is short; and the production cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of extraction of plant effective components, and relates to a subcritical continuous extraction technology of pyrethrum plant raw materials. Background technique [0002] Existing subcritical pyrethrum extraction is carried out in a single-tank extraction method. The structure of the extraction device is to install a liquid inlet pipe above the extraction tank, install a liquid outlet pipe below, and install a stop valve on the liquid inlet pipe and the liquid outlet pipe. When performing extraction work, first put the raw materials into the extraction tank, increase the temperature and pressure in the tank, put the extraction solvent into the tank to soak the raw materials in a subcritical state, and after a certain period of time, the solvent soaks the active ingredients in the raw materials to form The extract, and then the extract is transported from the outlet pipe of the extraction tank to the concentr...

Claims

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Application Information

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IPC IPC(8): B01D11/02A01N65/12A01P7/00
Inventor 梁忠禄方春荣柏锦学
Owner YUNNAN NANBAO BIOTECH
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