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Ceramic Membranes for Water Separation from Organic Solvents
Author(s) -
Kölsch P.,
Sziládi M.,
Noack M.,
Caro J.,
Kotsis L.,
Kotsis I.,
Sieber I.
Publication year - 2002
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/1521-4125(200204)25:4<357::aid-ceat357>3.0.co;2-p
Subject(s) - pervaporation , membrane , ultrafiltration (renal) , chemical engineering , permeation , membrane technology , chemistry , phenol , acetonitrile , ceramic , dimethylformamide , chromatography , organic chemistry , materials science , solvent , biochemistry , engineering
Novel hydrophilic SiO x modified alumina membranes with high separation factors and flux rates have been prepared for the separation of water from organic solvents. For the preparation of the membranes, SiO x networks are deposited inside the γ‐Al 2 O 3 layer of a commercial ultrafiltration membrane by hydrolysis of tetraethylorthosilicate in autoclaves at 250 °C. The transport resistances of the individual membrane layers for the permeation flux are described by a model. The membranes are stable towards solvents to temperatures of at least 150 °C. Pervaporation studies show that water can be separated from solvents such as acetonitrile, tetrahydrofurane, 2‐propanol, ethyl alcohol, dimethylsulfoxide, N, N‐dimethylformamide, and phenol. The separation performance of the membranes allows their use in technical separation processes, especially for the removal of water.