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Supercritical CO2 extraction method of black tea

A supercritical, CO2 technology, applied in the field of extraction, can solve the problems of non-recyclable, general extraction effect, limited solubility of extracts, etc., and achieve the effect of increasing solubility

Pending Publication Date: 2022-03-11
李志军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, in the existing supercritical CO2 extraction of black tea, because the solubility of the extract in supercritical CO2 is limited, and CO2 requires pure CO2 for each extraction, it cannot be recycled, so the extraction effect is general and the extraction cost is high.

Method used

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  • Supercritical CO2 extraction method of black tea

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Embodiment 2

[0042] The present embodiment is basically the same as the above embodiment, and the difference is that the plurality of extracted kettles are parallel, and each extracted extract is provided with separate pipes connected to the storage tank, each pipe is provided with a first switching valve and the first Heating and pressurizing device; the inlet of each extraction kettle is provided with a second switching valve, and the exit is provided with a third switching valve; when extraction, the first switching valve is closed, the second switching valve and the third switch valve are opened;

[0043] Extracts are provided with a first inlet and a first water opening, in this example, in the top of the first inlet, the first water opening is disposed at the bottom of the extracted kettle, and when extraction is performed, the first The inlet and the first outlet are all in a closed state.

[0044] A plurality of separation kettles are connected, and there is no direct connection, and t...

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Abstract

The invention relates to the technical field of extraction, in particular to a supercritical CO2 extraction method of black tea, which comprises the following steps: a phase change step: pressurizing and heating liquid CO2 to change the liquid CO2 phase into a supercritical state; an extraction step: carrying out mixed extraction on the black tea by using CO2 in a supercritical state in a first preset pressure environment; a separation step: in a second preset pressure environment, performing multi-stage heating depressurization separation on the CO2 containing the black tea extract; and a recovery step: collecting the separated black tea extract, and filtering and condensing the separated gas CO2 to recover the gas CO2 into liquid CO2. According to the scheme, the solubility of the extract in supercritical CO2 can be increased, and CO2 is recycled, so that the extraction effect is improved, and the extraction cost is reduced.

Description

Technical field [0001] Technical Field The present invention relates to the extraction, in particular to a tea supercritical CO2 extraction process. Background technique [0002] (The SFE, referred to as a supercritical extraction) supercritical fluid extraction is a supercritical fluid as an extractant, the one component (extract) is separated from the other component (matrix) technology. It originated in the 1940s and 1970s into industrial applications, and success. When using this technique the matrix is generally a solid, but may be liquid. SFE can be used as a sample preparation step prior to analysis, it may also be used in larger scale, the product release from undesirable substances, such as decaffeinated, or collect the desired product, such as essential oils. Carbon dioxide (CO2) is the most common supercritical fluid, so supercritical CO2 extraction, extraction is widely used in various types of substances. [0003] With the improvement of people's quality of life, pro...

Claims

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Application Information

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IPC IPC(8): B01D11/02
CPCB01D11/0203
Inventor 李志军
Owner 李志军
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