Patent ID: 8303690

Claim:
A hollow fiber carbon membrane, comprising carbonized substance obtained by calcination of a hollow fibrous material formed from a polyphenylene oxide derivative, which has an external diameter in the range of 0.08 mm to 0.25 mm, wherein the polyphenylene oxide derivative substantially comprises repeating units represented by the following structural formulae: (in the structural formula, R 11 and R 12 independently represent hydrogen atom, —SO 3 H or —SO 3 NH 4 , provide that R 11 and R 12 are not simultaneously hydrogen atoms), wherein the ratio A (%) of the number of the repeating unit (b) to the number of the repeating unit (a)+the number of the repeating unit (b) satisfies 15%<A<60%, wherein the hollow fibrous material is formed by dissolving the polyphenylene oxide derivative in an organic solvent and extruding the solution from an outer tube of a hollow fiber spinning nozzle with a circular cannula structure while extruding an immiscible core liquid from the inner tube of the hollow fiber spinning nozzle, together into a coagulation bath, and the core liquid and coagulation bath comprise any one of water and aqueous ammonium salt.