Invention Grant
- Patent Title: Apparatus for removing arsenic compound
- Patent Title (中): 去除砷化合物的装置
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Application No.: US14793974Application Date: 2015-07-08
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Publication No.: US09399213B2Publication Date: 2016-07-26
- Inventor: Masashi Kiyosawa , Norihisa Kobayashi
- Applicant: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
- Applicant Address: JP Yokohama-shi
- Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
- Current Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
- Current Assignee Address: JP Yokohama-shi
- Agency: Westerman, Hattori, Daniels & Adrian, LLP
- Main IPC: B01J23/90
- IPC: B01J23/90 ; B01J38/04 ; B01J21/20 ; B01J23/92 ; B01J38/12 ; B01J19/24 ; B01J21/06 ; B01J23/22 ; B01J23/30
Abstract:
Provided is a practical method for dry-separating arsenic compounds from a used NOx removal catalyst contaminated with arsenic. The method for removing arsenic compounds comprises heat-treating a NOx removal catalyst contaminated with arsenic compounds at a predetermined temperature in a reducing atmosphere while exposing the catalyst to hydrocarbon compounds (except CH4) or oxygen-containing carbon compound.
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