Catalytic oxidation unit and radiant gas burner

Claim 1

A CATALYTIC HEATER COMPRISING A HOUSING OPEN AT THE FRONT AND HAVING AN ENTRY PORT THROUGH WHICH FUEL GAS IS INTRODUCED INTO THE HOUSING, AND A CATALYST UNIT ACROSS THE FRONT OF SAID HOUSING, SAID CATALYST UNIT COMPRISING A SUPPORT STRUCTURE OF ASBESTOS CLOTH, WHICH IS JPROOUS TO PERMIT PASSAGE OF A FUEL GAS THERETHROUGH, AND A CATALYTIC MATERIAL DEPOSITED ON THE CLOTH, SAID CATALYTIC MATERIAL COMPRISING PARTICLES OF ACTIVE ALUMINA LESS THAN 20 MICRONS IN SIZE AND A CATALYTICALLY ACTIVE METAL FROM THE GROUP CONSISTING OF KPLATINUM, PALLADIUM AND RHODIUM, SAID METAL BEING PRECIPITATED ON AND FIXED ON THE PARTICLES OF ALUMINA IN A RATIO OF METAL TO ALUMINA OF 0.05-20% BY WEIGHT, SAID CATALYTIC MATERIAL BEING DEPOSITED ON SAID CLOTH IN A CONCENTRATION TO PROVIDE FROM 0.05-2.0 GRAMS OF THE CATALYTICALLY ACTIVE METAL PER SQUARE FOOT OF CLOTH.