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Die Entwicklung von Iösungsmittelselektiven Membranen und ihre Anwendung in der Gastrennung und Pervaporation
Author(s) -
Strathmann Heiner,
Bell Carl Martin,
Gudernatsch Wilhelm,
Kimmerle Klaus
Publication year - 1988
Publication title -
chemie ingenieur technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.365
H-Index - 36
eISSN - 1522-2640
pISSN - 0009-286X
DOI - 10.1002/cite.330600805
Subject(s) - pervaporation , membrane , chemistry , membrane technology , solvent , chemical engineering , ultrafiltration (renal) , organic chemistry , chromatography , permeation , engineering , biochemistry
Development of solvent‐selective membranes and their use in gas separation and pervaporation. Pervaporation and gas separation are two membrane processes whose industrial and economic importance has increased considerably in recent years because they are particularly suitable for selective removal of organic solvents from aqueous and gaseous mixtures. The problem of solvent removal is encountered, inter alia, in the purification of certain industrial gaseous and liquid effluents. However, the removal of solvents is also significant in petrochemistry and biotechnology and both pervaporation and gas separation can again be efficiently used here. On the basis of the equations relating to mass transfer in homogeneous polymers, criteria for the choice of polymers for high‐selectivity membrane production are discussed. The development of suitable membranes and membrane modules is described. Two industrially and economically relevant examples, viz. recovery of organic solvents from gaseous effluent and the continuous removal of ethanol from bioreactors, illustrate the scope and limitations of the procedures.