Porous semipermeable membrane resistant to chemicals and heat

Details Porous semipermeable membrane resistant to chemicals and heat Porous semipermeable membrane resistant to chemicals and heat

B - Operations, Transporting

01

D

B01D 69/06 (2006.01) B01D 69/10 (2006.01) B01D 71/52 (2006.01) B01D 71/56 (2006.01) B05D 7/02 (2006.01)

Patent

CA 2061990

Abstract of the disclosure: HOE 91/F 064 Porous semipermeable membrane resistant to chemicals and heat A semipermeable membrane for micro-, nano- and ultra- filtration, comprising a carrier material and a semi- permeable layer adhering to this. The carrier material is a woven fabric or a non-woven based on a polyphenylene sulfide, a polyether ketone or a polyaramid. To produce the semipermeable membrane, the polymers are first dissolved in a solvent and the solution is filtered and degassed. In a subsequent step, a membrane is produced by the phase inversion process, H2SO4, CF3-SO3H, HF, Cl2HC-COOH or a mixture of Cl2HC-COOH and H2SO4 being employed as the solvent for polyether ketones and N-methylpyrrolidone, dimethylacetamide or dimethyl- formamide being employed as the solvent for polyaramids.

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