Catalyst for treating exhaust gases containing dioxines, product

Details Catalyst for treating exhaust gases containing dioxines, product Catalyst for treating exhaust gases containing dioxines, product

1995-12-27

1998-07-21

Beck, Shrive

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Boron or compound containing same

502245, 502330, B01J 2102

Patent

active

057835152

ABSTRACT:
A catalyst including a first catalyst ingredient which is at least one element selected from a group consisting of Pt, Pd and Ir, or oxides thereof; and further able to include at least one element selected from a group consisting of Au, Ag, Cu, Fe, Sb, Se, Te and Ta, or oxides thereof, as a second catalyst ingredient, carried on at least one of a silica-boria-alumina composite oxide or a zeolite with a silica-to-alumina molar ratio of more than 30, in amounts of from 0.1 to 10 g of the first catalyst ingredient and from 0.01 to 5 g of the second catalyst ingredient based on one liter of the catalyst with the second to first catalyst ingredient weight ratio being less than 1. The catalyst is used for treating exhaust gases by bringing the exhaust gases containing HCl and dioxines into contact with the catalyst to thereby eliminate the HCl and dioxines from the exhaust gases by oxidative decomposition while suppressing the subsequent formation of dioxines from precursors for the dioxines present in the exhaust gases.

REFERENCES:
patent: 5164350 (1992-11-01), Abe et al.
patent: 5171728 (1992-12-01), Sakurai et al.
patent: 5346874 (1994-09-01), Clark et al.

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