HOLLOW FIBER CARBON MEMBRANE AND METHOD FOR PRODUCTION THEREOF

• US 20100212503A1
• Filed: 07/31/2008
• Published: 08/26/2010
• Est. Priority Date: 08/02/2007
• Status: Active Grant

• Current Assignee: National Institute of Advanced Industrial Science and Technology (Government of Japan)
• Original Assignee: National Institute of Advanced Industrial Science and Technology (Government of Japan)
• Inventors: Haraya, Kenji, Yoshimune, Miki
• Granted Patent: US 8,303,690 B2
• Time in Patent Office: Days
• US Class Current: 96/10
• CPC Class Codes: B01D 2325/24 Mechanical properties, e.g. strength
• CPC Class Codes: B01D 53/22 by diffusion manufacturing semi-permeable membranes B01D67/00; form, structure or properties of semi-permeable membranes B01D69/00; material for semi-permeable membranes B01D71/00
• CPC Class Codes: B01D 63/02 Hollow fibre modules
• CPC Class Codes: B01D 63/021 Manufacturing thereof
• CPC Class Codes: B01D 67/0067 by carbonisation or pyrolysis
• CPC Class Codes: B01D 69/02 characterised by their properties
• CPC Class Codes: B01D 69/08 Hollow fibre membranes manufacture of hollow fibres D01D5/24, D01F1/08
• CPC Class Codes: B01D 69/081 characterised by the fibre diameter
• CPC Class Codes: B01D 71/021 Carbon
• CPC Class Codes: B01D 71/5211 Polyethylene glycol or polyethyleneoxide
• CPC Class Codes: D01D 5/24 with a hollow structure; Spinnerette packs therefor D01D5/38 takes precedence; producing tubes of plastic material B29D; addition of agents forming hollow filaments D01F1/08
• CPC Class Codes: D01D 5/34 Core-skin structure; Spinnerette packs therefor
• CPC Class Codes: D01F 9/24 from macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds

Abstract

A hollow fiber carbon membrane is provided, which has excellent gas separation performance, unbreakable flexibility and high utility. The hollow fiber carbon membrane comprises carbonized substance obtained by calcination of a hollow fiber-like material formed from a polyphenylene oxide derivative, and has an external diameter in the range of 0.08 mm to 0.25 mm. The polyphenylene oxide derivative substantially comprises repeating units represented by the following (a) and (b) (in the structural formula, R¹¹ and R¹² independently represent hydrogen atom or sulfone group, except that R¹¹ and R¹² are both hydrogen atoms), wherein the ratio A (%) of the repeating unit (b) to the repeating units (a)+(b) satisfies 15%<A<60%.

Claims

1. A hollow fiber carbon membrane, comprising carbonized substance obtained by calcination of a hollow fiber-like 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:

2. A method for producing a hollow fiber carbon membrane, comprising dissolving a polyphenylene oxide derivative in an organic solvent, the polyphenylene oxide derivative substantially comprising repeating units represented by the following structural formulae:

3. The method for producing a hollow fiber carbon membrane according to claim 2, wherein the core liquid and coagulation bath comprise any one of water and aqueous ammonium salt.

4. The method for producing a hollow fiber carbon membrane according to claim 2, wherein the calcination is performed at a temperature in the range of 450°

C. to 850°

C., under a reduced pressure less than or equal to 10<sup>−

4</sup> atm or in an inert gas atmosphere.

5. The method for producing a hollow fiber carbon membrane according to claim 2, wherein before the calcination, a pre-heating treatment is performed at a temperature in the range of 150°

C. to 300°

C. for 30 minutes to 4 hours.

6. The method for producing a hollow fiber carbon membrane according to claim 2, wherein after the calcination, a post-heating treatment is performed at a temperature in the range of 150°

C. to 300°

C. for 30 minutes to 4 hours.