POROUS HOLLOW FIBER MEMBRANE HAVING COMPLEX FORMING GROUP AND METHOD FOR RECOVERING GERMANIUM OXIDE BY USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a porous hollow fiber membrane by which germanium being a waste material can be recovered and to provide a method for recovering germanium oxide by using the porous hollow fiber membrane. SOLUTION: The porous hollow fiber membrane has a chelate forming group obtained by reacting a residual group of a compound, which is produced on the surface of a polyethylene-made porous hollow fiber membrane having no special group by radiation graft polymerization and contains an epoxy group, with another compound which is reacted with the residual group of the compound to produce another residual group having a structure shown by formula (1) (wherein R1and R2are each a hydrogen atom or a lower alkyl group) or a cis-1,2-diol structure. The method for recovering germanium oxide by using the porous hollow fiber membrane having a chelate formation group comprises the steps of: bringing the porous hollow fiber membrane into contact with an aqueous solution containing germanium oxide to collect germanium oxide; and eluting the collected germanium oxide by an acidic solution to recover germanium oxide. COPYRIGHT: (C)2007,JPO&INPIT