Novel cellulose derivative, process for preparing the same and sulfur dioxide gas permselective membrane comprising the same

摘要

Hydrocarbylsulfinylethyl cellulose represented by the formula (1):wherein. X may be the same or different and represents hydrogen atom or hydrocarbylsulfinylethyl group represented by the formula (II):wherein, R may be the same or different and represents an alkyl group having 1 to 6 carbon atoms or a phenyl group, with the average substitution degree with the hydrocarbylsulfinylethyl group of the formula (II) per glucose unit being at least 0.05 is provided together with a process for preparing the same and a sulfur dioxide gas permeation membrane comprising said cellulose derivative. This membrane is excellent in sulfur dioxide gas permselectivity.