Catalytic destruction of organohalogen compounds
First Claim
1. A process for treating a gas stream containing C1 organohalogen compounds that do not have any carbon-hydrogen bonds comprising contacting the gas stream at a temperature of about 200°
- to about 500°
C. with a catalyst consisting essentially of titania and optionally at least one member of the group consisting of tungsten oxide, vanadium oxide, tin oxide and the noble metals platinum, palladium, and rhodium in the presence of an effective amount of water to convert said organohalogen compounds to carbon dioxide and haloacids.
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Abstract
This application relates to a catalyst and a process using this catalyst to convert or destroy organic compounds including organohalogen compounds. A preferred catalyst contains as catalytic components titania, vanadium oxide, tungsten oxide, tin oxide and at least one noble metal selected from the group consisting of platinum, palladium and rhodium, characterized in that the vanadium oxide, tungsten oxide and noble metals are uniformly dispersed on the titania. The process of this invention comprises contacting the gas stream, which contains organohalogen compounds and other organic compounds, at a temperature of about 200° to about 500° C. with the catalyst described above in the presence of an oxidizing agent and water. The oxidizing agent can be oxygen or air.
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Citations
18 Claims
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1. A process for treating a gas stream containing C1 organohalogen compounds that do not have any carbon-hydrogen bonds comprising contacting the gas stream at a temperature of about 200°
- to about 500°
C. with a catalyst consisting essentially of titania and optionally at least one member of the group consisting of tungsten oxide, vanadium oxide, tin oxide and the noble metals platinum, palladium, and rhodium in the presence of an effective amount of water to convert said organohalogen compounds to carbon dioxide and haloacids. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- to about 500°
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10. A process for treating a gas stream containing organohalogen compounds and optionally halogen-free compounds comprising contacting the gas stream with a catalyst consisting essentially of titania and optionally at least one member of the group consisting of tungsten oxide, vanadium oxide, tin oxide, and the noble metals platinum, palladium, and rhodium at a temperature of about 200°
- to about 500°
C. in the presence of an oxidizing agent and optionally water in amounts effective to convert said compounds to carbon dioxide, water, and haloacids. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
- to about 500°
Specification