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Decomposition catalyst for nitrous oxide, process for producing the same and process for decomposing nitrous oxide

A nitrous oxide and catalyst technology, applied in the direction of nitrous oxide capture, catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problems of reduced specific surface area and reduced catalytic activity.

Inactive Publication Date: 2003-11-19
RESONAC HOLDINGS CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially when the waste anesthetic gas containing the volatile anesthetic mixed therein is fed into the above-mentioned catalyst for decomposing nitrous oxide without treatment, the specific surface area of ​​the catalyst for decomposing nitrous oxide tends to decrease, As a result, the catalytic activity is severely reduced

Method used

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  • Decomposition catalyst for nitrous oxide, process for producing the same and process for decomposing nitrous oxide
  • Decomposition catalyst for nitrous oxide, process for producing the same and process for decomposing nitrous oxide
  • Decomposition catalyst for nitrous oxide, process for producing the same and process for decomposing nitrous oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0113] With 1.84g distilled water and 1.32g, 21.4% rhodium nitrate solution (Rh(NO 3 ) 3 aqueous solution) mixed. To this was added 2.04 g of a silica carrier (JRC-SIO-4, see Nippon Shokubai Gakkai, Shokubai (Catalyst) ), after the entire amount has been impregnated, the carrier is dried in a 90°C hot bath. The obtained carrier was dried in air at 110° C. for 12 hours, and then calcined at 650° C. for 2 hours to obtain Catalyst 1 in which 5% by mass rhodium (Rh) was supported on the silica carrier. Embodiment 2: the preparation of catalyst

Embodiment 2

[0114] Catalyst 2 was prepared in the same manner as in Example 1, but using 0.99g of 31.4% ruthenium nitrosyl nitrate solution (Ru(NO)(NO 3 ) 3 aqueous solution). In the obtained catalyst 2, 5% by mass of ruthenium (Ru) was supported on a silica carrier. Embodiment 3: the preparation of catalyst

Embodiment 3

[0115] Catalyst 3 was prepared in the same manner as in Example 1, but 0.43g of 52.2% palladium nitrate solution (Pd(NO 3 ) 3 aqueous solution). In the obtained catalyst 3, 5% by mass of palladium (Pd) was supported on a silica carrier. Embodiment 4: the preparation of catalyst

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Abstract

The invention provides a catalyst obtained by loading at least one noble metal selected from the group consisting of rhodium, ruthenium and palladium on a support selected from silica and silica alumina, and a method for decomposing nitrous oxide using the catalyst thereof. The catalyst for decomposing nitrous oxide of the present invention cannot be easily affected by a volatile anesthetic contained in a waste anesthetic gas, can recover the activity by activation and regeneration even when deteriorated, and can reduce the amount of NOx generated to less than the allowable concentration.

Description

[0001] Cross References to Related Applications [0002] This application is filed under 35 U.S.C. § 111(a) and has the benefit of the filing date of U.S. provisional application 60 / 275,107 pursuant to 35 U.S.C. § 119(e)(1), which was filed under 35 U.S.C. .S.C. Section 111(b) was filed on March 13, 2001. technical field [0003] The present invention relates to a catalyst for decomposing nitrous oxide contained in waste anesthetic gas discharged from an operating room, and to a method for producing the catalyst and a method for decomposing nitrous oxide using the catalyst. Background technique [0004] The anesthetic gas contains nitrous oxide and a volatile anesthetic. Contamination of operating rooms with anesthetic gases and health hazards of anesthetic gases to operating room staff have been a matter of debate since the 1960s, and it is now known that chronic inhalation of leaked anesthetic gases in the operating room can lead to disease. In the United States, the Nat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/94B01D53/86B01J23/00B01J23/44B01J23/46B01J23/60B01J23/656B01J23/89B01J37/02
CPCB01J23/6562B01D2255/2092B01D53/8628B01D2255/20B01J23/005B01D2255/2073B01J23/8906B01D2257/402B01D53/86B01D2255/30Y02C20/10B01J23/46B01D2255/102B01J23/60B01D2255/20738B01J23/44
Inventor 堀田雅敏古濑良雄跡辺仁志茶圆茂広寺冈靖刚
Owner RESONAC HOLDINGS CORPORATION
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