Method of decomposing ozone

• US 4,379,129 A
• Filed: 11/20/1980
• Issued: 04/05/1983
• Est. Priority Date: 05/06/1976
• Status: Expired due to Term

• Current Assignee: Fuji Xerox Company Limited (Xerox Holdings Corp.)
• Original Assignee: Fuji Xerox Company Limited (Xerox Holdings Corp.)
• Inventors: Abe, Akira
• Primary Examiner(s): Thomas, Earl C.
• Application Number:
  US06/208,770
• Time in Patent Office: 866 Days
• Field of Search: 423/210, 423/219, 252/447, 250/324, 250/325, 250/326, 355/8, 355/18
• US Class Current: 423/219
• CPC Class Codes: B01D 53/8675 Ozone
• CPC Class Codes: B01J 23/50 Silver
• CPC Class Codes: G03G 21/206 Conducting air through the machine, e.g. for cooling, filtering, removing gases like ozone

Abstract

A catalyst capable of decomposing ozone comprising active carbon with silver deposited on the surfaces thereof.

Claims

1. A process for decomposing ozone discharged from an electrophotographic duplicating machine, which comprises contacting the discharged ozone with a catalyst comprising active carbon with silver deposited on the surface thereof.

2. The process of claim 1, wherein said active carbon is an active carbon having a surface area of about 700 to about 1,500 m² /g.

3. The process of claim 1, wherein the amount of silver deposited on the surfaces of said catalyst ranges from about 0.005 to about 10% by weight based on the weight of the active carbon.

4. The process of claim 1, wherein said catalyst comprises a bed of said catalyst in particulate form.

5. The process of claim 1, wherein said catalyst is attached to a fibrous material as a filter.

6. The process of claim 1, wherein said catalyst is applied to an exhaust duct surface of the duplicating machine.

7. The process of claim 1, wherein said catalyst is applied to an exhaust fan surface of the duplicating machine.

8. The process of claim 1, wherein said catalyst is applied to the inner surfaces of a corona discharger.

9. A process for decomposing ozone contained in exhaust air discharged from an electrophotographic duplicating machine, which comprises passing the ozone-containing air through an ozone decomposing filter containing a catalyst comprising active carbon with silver deposited on the surface thereof.

10. The process of claim 9, wherein said catalyst comprises a bed of said catalyst in particulate form.

11. The process of claim 9, wherein said catalyst is attached to a fibrous material as a filter.