13706663118
In the process of plant extraction, a large number of impurities such as plant protein, plant colloid, sugar, starch, fiber cell, tannin, salt, alkaloid, glycoside come out with the extraction solution. These impurities are not only turbid but also rich in suspended impurities, which seriously affect the subsequent purification and crystallization process and quality. For example, pigment removal, resin plugging and cleaning are frequent and difficult, increasing extraction and crystallization times, and bad crystal color and shape. It will not only affect the adsorption pertinence of the upper column resin, lead to the decline of the quality stability of the preparation, but also easily pollute the resin, and increase the frequency of resin cleaning and regeneration.
The traditional clarification operation of extraction liquid adopts centrifugation, plate and frame filtration, clarifier, alcohol precipitation, macroporous resin adsorption, extraction and other processes, but it is unable to effectively clarify and separate the plant extraction liquid. At the same time, there are still some problems, such as low filtering accuracy, fast blocking, large consumption of alcohol precipitation solvent, resin plugging, high energy consumption of high temperature concentration, emulsification during extraction, multiple recrystallization, and growth The amount of wastewater produced and extracted is large, which causes the burden of environmental protection.
Membrane separation is to use microfiltration or ultrafiltration technology to filter the extract with high precision, so that the extract becomes extremely clear and bright liquid after filtration, and at the same time, the ineffective macromolecular substances are completely retained, water and inorganic salts are removed, so that the effective components are concentrated and refined; and through the specially designed operation process, impurities are not easy to block on the membrane surface, solving the problem of membrane pollution and blockage, Membrane permeated water can be recycled to the pre extraction process to reduce environmental pressure.
Technical features of membrane separation system equipment:
1. It is a green environmental protection technology without pollution and residue.
2. There is no phase change in the membrane process, no heating is required, and energy consumption is greatly saved.
3. The filtration process only uses pressure as the power of membrane separation, the separation device is simple, the operation is simple, and the process parameters are easy to control; the process is simple, the process is short, and the production cycle is greatly shortened.
4. The filtration precision is very high, the filtrate clarity is high, and the impurity content is small; the content of the effective component is increased by keeping the component of the original formula.
5. Ceramic membrane has high pollution resistance, low requirements for liquid medicine pretreatment, and can be filtered for a long time and high throughput.
6. The membrane pore is rigid, the membrane material is inert, resistant to polar organic solvent, and not easy to be corroded and deformed.
7. It can be cleaned with strong acid-base oxidizing reagent of pho ~ 14. Ceramic membrane components can be cleaned and regenerated thoroughly, and the service life is 5-10 times of that of organic membrane.
8. The ceramic membrane element is resistant to high temperature and can be sterilized by steam and oxidant.
9. The amount of ethanol used in the production is greatly reduced, the explosion-proof requirements are reduced, and the operation environment and production safety are improved.
10. Change the problem that the solution recovered by alcohol precipitation is often sticky and difficult to concentrate, so as to ensure that the liquid preparation is not prone to precipitation or wall sticking during the storage period.
11. The content of impurity protein, tannin and pectin in the filtrate is greatly reduced, so that the membrane pollution is reduced, the flux is increased, and the cleaning cycle and service life are prolonged.
12. PLC upper computer control, reliable operation, greatly reducing labor intensity.
The clarified plant extract after microfiltration or ultrafiltration and the resin analytical solution after effective adsorption can be concentrated by nanofiltration or reverse osmosis membrane to effectively intercept the target components, remove the solvent and achieve the purpose of concentration, instead of the traditional concentration methods such as scraper and double effect, which can save a lot of energy consumption.
Application area
Clarification, separation, purification and concentration of extracts from plant branches and leaves: such as tea, ginkgo, chrysanthemum, Coptis, forsythia, bamboo leaves;
Purification and concentration of plant rhizome extracts: such as Radix Isatidis, Codonopsis pilosula, ginseng, Houttuynia cordata, Artemisia annua, Gynostemma pentaphyllum and Xanthophyta;
Separation, purification and concentration of fruit extracts: such as ginger, soybean, garlic, Siraitia grosvenorii, wolfberry, etc.
Advantages of application:
1. The extraction solution shall be subject to membrane clarification first to remove macromolecular protein, polysaccharide, starch, tannin, plant fiber, etc. in the solution, so as to improve the clarity of the extraction solution, which is conducive to protecting the subsequent concentration membrane, improving the concentration ratio and extending the service life of the concentration membrane.
2. Nanofiltration (reverse osmosis) can effectively intercept the target components, remove the solvent, and achieve the purpose of concentration; the concentrated effluent is clear and bright, and can be directly extracted for reuse or discharge, saving water resources and reducing environmental pressure.
3. Membrane concentration is a normal temperature concentration technology, which can reduce the loss of effective components due to high temperature decomposition, ensure the product yield, save a lot of steam and reduce energy consumption.
4. If the high-temperature resistant membrane is used for concentration, if the temperature of the extraction solution is 70 ℃, the water from the membrane concentration is still 70 ℃, and the high-temperature recovery reduces the energy consumption and further reduces the cost.
5. The membrane concentration process is closed. If the extraction solvent is ethanol, the loss of ethanol can be reduced and the cost investment caused by ethanol loss can be sav
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