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Views: 0 Author: Stella xiao Publish Time: 2026-08-12 Origin: Site
Membrane‑based liquid separation has become a cost‑effective alternative to traditional purification for botanical extracts and biopharmaceutical raw materials. Small‑scale pilot trials are essential before full‑scale production, helping engineers verify filtration performance, remove impurities, and optimize product color and purity.
The picture displays four typical liquid samples from our in‑house pilot test, covering crude extract, solvent‑system permeate, biopharmaceutical permeate and finished extract sample.
The first bottle is the crude extraction liquid. It presents a deep dark color, which represents the original feed liquid after initial extraction. This raw material contains target active ingredients alongside large amounts of pigments, macromolecular impurities, suspended solids and colloids. Direct use of this crude liquid will lead to low‑quality end products, so further purification is required.
The second sample is 10% methanol permeate, collected after cross‑flow membrane filtration under alcoholic solvent condition. After membrane treatment, most macromolecular impurities and pigments are intercepted by the membrane element. The permeate turns pale yellow, with partial target compounds passing through the membrane. This test proves the membrane’s compatibility with methanol‑water mixed solvent, which is critical for many plant extract purification workflows.
The third bottle is heparin sodium permeate. Heparin sodium is a key biopharmaceutical raw material with strict requirements on clarity and impurity removal. After ultrafiltration treatment, the obtained permeate is nearly transparent. The membrane process effectively intercepts protein impurities and colloidal contaminants, simplifying downstream purification steps and reducing overall production costs.
The fourth sample is the finished botanical extract sample (Zidingsu 1‑1). After the complete membrane separation workflow including clarification, impurity removal and concentration, the final liquid shows uniform golden‑yellow appearance. Undesired pigments and insoluble substances are largely eliminated, and the concentration of desired active components is elevated.
Why run membrane pilot tests?
Visual comparison of feed vs permeate liquid gives direct feedback on impurity removal and decoloring effect.
Verify solvent compatibility, especially for alcohol‑containing working conditions.
Confirm processing parameters before industrial equipment investment, lower project risks.
Replace traditional evaporation and resin process, cut energy consumption and chemical usage.
For plant extracts, heparin sodium and similar bio‑liquid processing, pilot membrane trials deliver reliable data for scale‑up production. Customized small‑batch testing service is available to match your unique feedstock and target requirements.
