Shandong Bona Biology removes some solid impurities from the plant extract through pre-treatment. After pre-treatment, the feed liquid undergoes ultrafiltration membrane clarification system to remove impurities, and the ultrafiltration clarified liquid enters the concentration membrane system. During the concentration and solvent removal process, some small molecule impurities are removed, and the concentrated solution continues to be processed through subsequent processes. If it is necessary to improve the purity and quality of the product, after the membrane pre-treatment, we can use small molecule ultrafiltration to accurately remove impurities, and the ultrafiltration liquid can then enter the concentration system for concentration treatment.

Plant extraction liquid membrane filtration concentration process flow:

Extraction solution → pretreatment → ultrafiltration → small molecule ultrafiltration → membrane concentration → single effect/multi effect → subsequent processes

Introduction to Separation of Plant Extracts:

During the process of plant extraction, a large amount of impurities such as plant protein, plant colloids, tannins, starch, cellulose, sugars, salts, etc. in the plant come out along with the extraction solution. The presence of these impurities often leaves the extraction solution in a suspended state, seriously affecting the subsequent purification and crystallization processes and quality. Phenomena such as pigment removal, resin blockage, frequent and difficult clarity, increased extraction and crystallization times, and poor crystal color and morphology. Traditional processes such as centrifugation, plate and frame filtration, clarifier method, alcohol precipitation method, macroporous resin adsorption method, and extraction method cannot effectively clarify and separate plant extracts. At the same time, there are also problems such as difficult filtration and fast blockage, high consumption of alcohol precipitation solvent, resin blockage, high energy consumption for high-temperature concentration, emulsification phenomenon during extraction, multiple repeated crystallization, large amount of production extraction wastewater, and environmental burden.

Advantages of plant extraction liquid membrane filtration concentration process:

1. After pre-treatment, the extract is subjected to ultrafiltration to remove macromolecular proteins, tannins, starch, plant fibers, polysaccharides, etc. from the solution, improving the clarity of the extract and protecting the subsequent concentration membrane, ensuring the concentration effect, and extending the service life of the concentration membrane.

2. Small molecule ultrafiltration can effectively remove impurities such as soluble macromolecular proteins, polysaccharides, and colloids, improving product purity and quality. The ultrafiltration membrane has a wide range of pore size and material selectivity, which can be analyzed and selected based on specific products.

3. The concentration membrane can effectively intercept the target components, remove the solvent, and achieve the purpose of concentration; The concentrated effluent is colorless, clear, and transparent, and can be directly extracted, reused, or discharged, saving water resources and reducing environmental pressure.

4. Membrane concentration is a type of room temperature concentration that can reduce the losses caused by the decomposition of active ingredients due to high temperature, ensuring product yield, and saving a large amount of steam and reducing energy consumption;

5. The membrane concentration process is closed, and if the extraction solvent is ethanol, it can reduce the loss of ethanol and save the cost investment caused by ethanol loss.