Abstract 1. A PROCESS FOR PREPARING AN ULTRA-STABLE CATALYST FOR THE CONVERSION OF THE NOXIOUS COMPONENTS OF EXHAUST GASES TO INNOCUOUS ENTITIES CONSISTING ESSENTIALLY OF: (A) IMPREGNATING A SUPPORT SELECTED FROM THE GROUP CONSISTING OF ALUMINA, MULLITE, SILICA, CORDIERITE, AND SILICA-ALUMINA OF SUFFICIENT SURFACE AREA WITH A SOLUTION OF A SOLUBLE SALT OF CERIUM WHICH UPON CALCINATION PROVIDES CERIUM OXIDE ON THE SUPPORT, (B) CALCINING THE IMPREGNATED SUPPORT IN AIR BY HEATING TO A TEMPERATURE OF ABOUT 1000* TO 2000*F. TO CONVERT THE CERIUM TO OXIDE FORM, (C) CONTACTING THE IMPREGNATED SUPPORT WITH A SUFFICIENT QUANTITY OF A SOLUTION OF A SALT OF A NOBLE METAL SELECTED FROM THE GROUP CONSISTING OF PLATINUM, PALLADIUM AND MIXTURES THEREOF, AND A SOLUBLE CERIUM SALT TO IMPART A NOBLE METAL CONTENT OF 0.01 TO 5 PERCENT AND A FINAL CERIUM OXIDE CONTENT OF 2 TO 90 PERCENT WITH RESPECT TO THE SUPPORT, (D) CALCINING TO ABOUT 900* TO 1200*F. FOR ABOUT 2-6 HOURS, AND (E) RECOVERING THE CATALYST PRODUCT.
A PROCESS FOR PREPARING AN ULTRA-STABLE CATALYST FOR THE CONVERSION OF THE NOXIOUS COMPONENTS OF EXHAUST GASES TO INNOCUOUS ENTITIES CONSISTING ESSENTIALLY OF: (A) IMPREGNATING A SUPPORT SELECTED FROM THE GROUP CONSISTING OF ALUMINA, MULLITE, SILICA, CORDIERITE, AND SILICA-ALUMINA OF SUFFICIENT SURFACE AREA WITH A SOLUTION OF A SOLUBLE SALT OF CERIUM WHICH UPON CALCINATION PROVIDES CERIUM OXIDE ON THE SUPPORT, (B) CALCINING THE IMPREGNATED SUPPORT IN AIR BY HEATING TO A TEMPERATURE OF ABOUT 1000* TO 2000*F. TO CONVERT THE CERIUM TO OXIDE FORM,
Claim 2
Dependent Claim
85 words
A PROCESS FOR PREPARING AN ULTRA-STABLE CATALYST FOR THE CONVERSION OF THE NOXIOUS COMPONENTS OF EXHAUST GASES TO INNOCUOUS ENTITIES CONSISTING ESSENTIALLY OF: (A) IMPREGNATING A SUPPORT SELECTED FROM THE GROUP CONSISTING OF ALUMINA, MULLITE, SILICA, CORDIERITE, AND SILICA-ALUMINA OF SUFFICIENT SURFACE AREA WITH A SOLUTION OF A SOLUBLE SALT OF CERIUM WHICH UPON CALCINATION PROVIDES CERIUM OXIDE ON THE SUPPORT, (B) CALCINING THE IMPREGNATED SUPPORT IN AIR BY HEATING TO A TEMPERATURE OF ABOUT 1000* TO 2000*F. TO CONVERT THE CERIUM TO OXIDE FORM,