Method of preparing a hollow membrane for mass transfer between a liquid phase and a gaseous phase

Method of preparing a hollow membrane for mass transfer between a liquid phase and a gaseous phase

A method for preparing a hollow membrane for mass transfer between a liquid phase and a gaseous phase, comprising: preparing a polymeric paste obtained by mixing from 13 to 39% of a polymer belonging to the class of polysulphones with a polar aprotic solvent. The blend is extruded from an annular op...

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Bibliographische Detailangaben
Hauptverfasser: PALUMBO, GIUSEPPE, FECONDINI, LUCIANO
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
TRANSPORTING
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Beschreibung
Zusammenfassung:A method for preparing a hollow membrane for mass transfer between a liquid phase and a gaseous phase, comprising: preparing a polymeric paste obtained by mixing from 13 to 39% of a polymer belonging to the class of polysulphones with a polar aprotic solvent. The blend is extruded from an annular opening of an annular section extruder head with concomitant injection from the extruder head of a precipitant solution into the forming hollow membrane. The precipitant solution consists of 5 - 55% by weight of a polar aprotic solvent and of 45 - 95% by weight of a solvent selected from the group consisting of acetone, methylethylketone, glycerol, water, ethylene glycol, ethanol, butanol and isopropyl alcohol.