公开(公告)号：JPH07241461A

公开(公告)日：1995-09-19

申请号：JP6011494

申请日：1994-03-03

Applicant: AGENCY IND SCIENCE TECHN

Inventor： FURUTA TAKESHI ,  HATORI HIROAKI ,  YAMADA YOSHIO ,  YOSHIZAWA NORIKO ,  SHIRAISHI MINORU

IPC: C01B31/02 ,  B01J20/20 ,  B01J20/28 ,  C10L5/44

Abstract: PURPOSE:To expand the range of the use of a carbon material in application fields such as absorbent, electromagnetic-shielding material, etc., by using a hollow short-fibrous carbon material formed through subjecting conifer charcoal to gaseous phase oxidation at a specified temp. and thereafter the resulting material to alkali treatment. CONSTITUTION:Matured wood of a conifer such as Japanese cedar, pine, Japanese cypress, etc., is subjected to heat treatment at 500 to 800 deg.C in an inert atmosphere to form charcoal. Then, this charcoal is subjected to gaseous phase oxidation at 270 to 350 deg.C in an atmosphere contg. oxygen in a

公开(公告)号：JPH04326930A

公开(公告)日：1992-11-16

申请号：JP12206691

申请日：1991-04-24

Applicant: AGENCY IND SCIENCE TECHN

Inventor： HATORI HIROAKI ,  YAMADA YOSHIO ,  SHIRAISHI MINORU

IPC: B01D71/02 ,  B01D71/52 ,  B01D71/56 ,  B01D71/64

Abstract: PURPOSE:To obtain a molecular sieve carbon membrane having clear molecular sieve capacity and high separation efficiency. CONSTITUTION:An aromatic polymer membrane is carbonized independently or in the farm deposited on a polymer porous support to form a molecular sieve carbon membrane having an extremely thin molecular sieve carbon layer having no crack or pinhole. This membrane has homogenous pores with a diameter of 10A or less and shows the permselectivity to gas and sieve action due to the size of a molecule and high separation efficiency.

公开(公告)号：JPH04136222A

公开(公告)日：1992-05-11

申请号：JP25419090

申请日：1990-09-26

Applicant: AGENCY IND SCIENCE TECHN

Inventor： HATORI HIROAKI ,  YAMADA YOSHIO ,  SHIRAISHI MINORU

IPC: D01F9/22 ,  D01F8/16 ,  D01F9/24 ,  D01F11/14

Abstract: PURPOSE:To simply and industrially provide a graphite filament having an excellent crystallization property and conductivity by subjecting a conjugate filament to a thermal treatment, the conjugate fiber being prepared by disposing an aromatic polymer layer on a single filament of a polymer, etc. CONSTITUTION:A conjugate filament is subjected to a thermal treatment to provide the objective graphitized filament, the conjugated filament being prepared by disposing the layer of an aromatic polymer (preferably a polyimide, polyamide, polyamideimide, polyoxadiazole, polyarylate, polybenzimidazole or polyphenylene vinylene) on the single filament of a polymer or carbon.