SOLID OXYGEN SCAVENGER COMPOSITION AND PROCESS FOR PRODUCING THE SAME

• US 20110172091A1
• Filed: 03/25/2011
• Published: 07/14/2011
• Est. Priority Date: 10/21/2005
• Status: Active Grant

• Current Assignee: Ken Sugimoto, Masaharu Udagawa, Takahiro Seki, Yoshinobu Miyabe
• Original Assignee: Ken Sugimoto, Masaharu Udagawa, Takahiro Seki, Yoshinobu Miyabe
• Inventors: SUGIMOTO, Ken, Seki, Takahiro, Udagawa, Masaharu, Miyabe, Yoshinobu
• Granted Patent: US 8,168,079 B2
• Time in Patent Office: Days
• US Class Current: 502/404
• CPC Class Codes: A23L 3/3436 Oxygen absorbent
• CPC Class Codes: B01D 2253/11 Clays
• CPC Class Codes: B01D 2253/112 Metals or metal compounds not provided for in B01D2253/104 or B01D2253/106
• CPC Class Codes: B01D 2257/104 Oxygen
• CPC Class Codes: B01D 53/02 by adsorption, e.g. preparative gas chromatography solid sorbent compositions B01J20/00, preparation of inorganic compounds or elements C01
• CPC Class Codes: B01J 20/0229 Compounds of Fe
• CPC Class Codes: B01J 20/0281 Sulfates of compounds other than those provided for in B01J20/045
• CPC Class Codes: B01J 20/04 comprising compounds of alkali metals, alkaline earth metals or magnesium
• CPC Class Codes: B01J 20/046 containing halogens, e.g. halides
• CPC Class Codes: B01J 20/12 Naturally occurring clays or bleaching earth
• CPC Class Codes: B01J 20/20 comprising free carbon; comprising carbon obtained by carbonising processes
• CPC Class Codes: B01J 20/223 containing metals, e.g. organo-metallic compounds, coordination complexes
• CPC Class Codes: B01J 20/26 Synthetic macromolecular compounds
• CPC Class Codes: B01J 20/28 characterised by their form or physical properties
• CPC Class Codes: B01J 20/28042 Shaped bodies; Monolithic structures
• CPC Class Codes: B01J 20/3007 Moulding, shaping or extruding
• CPC Class Codes: B01J 20/3035 Compressing
• CPC Class Codes: B01J 2220/42 Materials comprising a mixture of inorganic materials materials coated or impregnated on a carrier B01J20/32
• CPC Class Codes: B01J 2220/46 Materials comprising a mixture of inorganic and organic materials materials coated or impregnated on a carrier B01J20/32
• CPC Class Codes: B65D 81/266 for absorbing gases, e.g. oxygen absorbers or desiccants B65D51/244, B65D51/30 take precedence
• CPC Class Codes: Y02E 60/32 : Hydrogen storage

Abstract

A molded oxygen absorbent composition and a process of producing the molded oxygen absorbent composition are disclosed. The molded oxygen absorbent composition is composed of a molded product of an oxygen absorbent composition which contains an oxygen absorbing substance, water or moisture, and a swelling component capable of being swelled with water or moisture. The product is formed by pressure molding the composition. The molded oxygen absorbent composition is reduced in its size and excellent in oxygen absorbing property.

Claims

1. A process for producing a molded oxygen absorbent composition, comprising a step of pressure molding an oxygen absorbent composition including an oxygen absorbing substance, water or moisture, and a swelling component capable of being swelled with water or moisture, wherein said swelling component is a bentonite and a carboxymethylcellulose.

2. The process according to claim 1, wherein the pressure molding is carried out in a continuous way, and the oxygen absorbent composition further comprises, as a pressure molding additive, a hydrophilic or water soluble thickener alone or in combination with a hydrophobic wax.

3. The process according to claim 2, wherein said oxygen absorbent composition further comprises said hydrophilic or water soluble thickener alone, in an amount of 0.2 to 6% by weight of the oxygen absorbent composition.

4. The process according to claim 2, wherein said oxygen absorbent composition further comprises both said hydrophilic or water soluble thickener and said hydrophobic wax, in amounts of 0.1 to 4.5% by weight of each of the thickener and the hydrophobic wax.

5. The process according to claim 1, comprising the further step, after the pressure molding, of granulating the pressure molded product.

6. The process according to claim 1, comprising the further step of mixing the oxygen absorbing substance, water or moisture, and the swelling component, to form the oxygen absorbent composition which is pressure molded.

7. The process according to claim 1, wherein the step of pressure molding is carried out in an inert atmosphere.