Solvent resistant nanofiltration membrane filtration technology contains a membrane module and the solvent containing at least one solute. The raw material passes through the membrane at pressures no higher than 60bar. As a result of the nanopore of the membrane, the solvent becomes a penetration object through the membrane, and then the concentrated solute is blocked by the membrane (= residue). One or multiple solutes enter the penetration object through the membrane, while the others remain in the residue. The intercepted molecular weight can be selected in the range of 150Da-900Da.
Process advantages:
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Organic solvent resistant nanofiltration membrane can be operated at normal temperature or low temperature without affecting the activity of active substances;
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Organic solvent resistant nanofiltration membrane can filter and separate the active substances in organic solvents to reduce input and the process;
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Repeated filtrations of organic solvent resistant nanofiltration membrane can improve the yield of products;
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Multi-level parallel connection of organic solvent nanofiltration membrane multistage parallel can increase production scale;
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Multi-level series of organic solvent resistant nanofiltration membrane can be used to improve the purity of products;
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Reduce the difficulty of integration of system engineering and improve the reliability of operation separation.
The tolerable solvents include:
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Acetonitrile
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Ethyl acetate
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Isopropyl alcohol
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Tetrahydrofuran (THF)
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Toluene
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N-methylpyrrolidone
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Acetone
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Methanol
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Ethanol
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Ethane
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Dimethylformamide
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Dichloromethane
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Alcohol
Application area:
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Paint coating: waste liquid flow used for purification production line, recycle valuable solvents and coatings
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Medicine: purification of concentrated drugs and intermediates in solvent medium
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Recovery of antibiotics and peptides
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Reclaim dissolved chemical substances
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Solvent purification
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Recovery of polymer binder and separation of pigments
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Recovery of dissolved catalyst
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Recovery of hydrocarbon during cleaning
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