摘要 |
<p>A membrane, for the separation of a water-alcohol mixed liquid by the pervaporation method, composed of a chitosan having a molecular weight of 80,000 to 150,000 and a deacetylation degree adjusted to 80 to 95% is prepared by dissolving a chitosan in an acidic aqueous solution to form a dope having the chitosan concentration of 9 to 12% by weight, shaping the dope into a membrane and immersing the membrane in an alkaline solution. The membrane has excellent selective permeability to water and mechanical strength.</p> |
申请人 |
TOKUYAMA SODA K.K., TOKUYAMA, YAMAGUCHI, JP;KATOKICHI CO. LTD., KANONJI, KANAWA, JP |
发明人 |
TSUGITA, TAKASHI, MARUGAME-SHI KAGAWA-KEN, JP;TAKEUCHI, SHINYA, MARUGAME-SHI KAGAWA-KEN, JP;DOI, KOICHI, SETAGAYA-KU TOKYO, JP;KISHIMOTO, FUMITO, TOKUYAMA-SHI YAMAGUCHI-KEN, JP |