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AssigneeAgency of Industrial Science and Technology
InventorsAkira Michizuki, Yoshio Sato, Hisashi Ogawara, Syuzo Yamashita
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A liquid separation membrane for pervaporation composed of a polymeric substance having in the main chain a glycosidic skeleton containing cationic groups and/or anionic groups at least some of which form a salt with counter anions and/or counter cations; and a method for pervaporation, which comprises separating a water-organic liquid mixture or an organic liquid-organic liquid mixture by pervaporation using a separation membrane, said membrane being composed of a polymeric substance having in the main chain a glycosidic skeleton containing cationic groups and/or anionic groups at least some of which form a salt with counter anions and/or counter cations and being dried so as to have a water content of not more than 25% by weight.
An organic liquid separation membrane for pervaporation composed of a salt of alginic acid or a salt of an alginic acid derivative having carboxylic groups at least some of which are crosslinked with polyvalent metal ions by ion exchange.
Dependencies are inferred from the claim text.