POROUS HOLLOW FIBER MEMBRANE HAVING CHELATE FORMING ABILITY AND METHOD FOR RECOVERING GERMANIUM OXIDE USING THE SAME

Japanese Patent JP3924392

B2

PROBLEM TO BE SOLVED: To obtain a porous hollow fiber membrane capable of efficiently recovering germanium oxide by allowing the residue of an epoxy-containing compound subjected to radiation graft polymerization on the surface of a porous hollow fiber membrane made of polyethylene to react with a compound giving a residue containing a specified structure by reaction with the above residue.
SOLUTION: The residue of an epoxy-containing compound subjected to radiation graft polymerization on the surface of a porous hollow fiber membrane made of polyethylene is allowed to react with a compound giving a residue containing a structure of formula I (where R1 and R2 are each H or a lower alkyl) by reaction with the above residue to obtain the objective 1st porous hollow fiber membrane having chelate forming ability. In other way, the residue of the epoxy-containing compound is allowed to react with a compound giving a residue containing a structure of formula II (cis-1,2-diol structure) by reaction with the above residue to obtain the objective 2nd porous hollow fiber membrane having chelate forming ability.

Kyoichi Saito
Katsuyuki Sato
Mitsuo Akiba

JP12745999A

June 06, 2007

May 07, 1999

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Asai Germanium Research Institute Co., Ltd.

B01J45/00; B01D15/00; B01D61/00; B01D67/00; B01D69/08; B01D71/26; B01J20/26; B01J20/32; C01G17/02; C02F1/28; C02F1/62; C08G63/48; C22B3/00; C22B41/00; D06M10/00; D06M13/325; D06M13/368; D06M14/28; D06M15/273; B01J20/28; (IPC1-7): B01D69/08; B01D71/26; D06M10/00; D06M14/28; D06M15/273

JP8199480A
JP7024314A
JP5057209B2
JP3016691A
JP5111685A

Masato Kobayashi
Naoki Yoshimura

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