There are provided a porous hollow fiber membrane capable of economically
and efficiently recovering germanium which has heretofore been entirely
disposed as a waste, and a method for recovery of germanium oxide using
such a porous hollow fiber membrane.
The porous hollow fiber membrane of the present invention is characterized
by being obtained by reacting the residue of an epoxy group-containing
compound subjected to irradiation-induced graft polymerization on a
polyethylene-made porous hollow fiber membrane, with a compound capable of
reacting with said reside to give a residue containing a structure
represented by the following formula:
##STR1##
(wherein R.sub.1 and R.sub.2 are a hydrogen atom or a lower alkyl group) or
the following formula:
##STR2##
and the method for recovery of germanium oxide according to the present
invention is characterized by contacting an aqueous germanium oxide
solution with the above porous hollow fiber membrane having chelate
formability, to allow the porous hollow fiber membrane having chelate
formability, to capture the germanium oxide contained in the aqueous
solution, and then dissolving the captured germanium oxide into an acidic
solution.
