초록 ▼

A composition of matter comprising monolith support material, SnO2, Pt and/or Pd and at least one Cr compound is prepared by a process comprising the steps of coating a monolith material with colloidal SnO2, drying, impregnation with compounds of Pt and/or Pd and Cr (and preferably Mn), drying/calci

A composition of matter comprising monolith support material, SnO2, Pt and/or Pd and at least one Cr compound is prepared by a process comprising the steps of coating a monolith material with colloidal SnO2, drying, impregnation with compounds of Pt and/or Pd and Cr (and preferably Mn), drying/calcining, and heating in a reducing gas at a temperature of about 0-300°C. This composition of matter is used as a catalyst in a process for oxidizing CO with O2 to CO2, preferably in a CO2 laser.

대표청구항 ▼

A process for oxidizing carbon monoxide comprising the step of contacting a gas mixture comprising CO and O2 with a catalyst composition comprising monolith support material, tin dioxide, at least one noble metal selected from the group consisting of platinum and palladium, and at least one oxide of

A process for oxidizing carbon monoxide comprising the step of contacting a gas mixture comprising CO and O2 with a catalyst composition comprising monolith support material, tin dioxide, at least one noble metal selected from the group consisting of platinum and palladium, and at least one oxide of chromium, under such reaction conditions as to at least partially convert said CO and O2 to CO2; wherein said catalyst composition has been prepared by a preparation process comprising the steps of: (A) impregnating a monolith material with a colloidal dispersion of tin dioxide in a suitable liquid dispersion medium; (B) heating the tin dioxide-coated material obtained in step (A) so as to obtain a substantially dried tin dioxide-coated monolith material; (C) contacting the material obtained in step (B) with at least one dissolved compound of at least one noble metal selected from the group consisting of platinum, and at least one dissolved compound of chromium; (D) heating the material obtained in step (C) under such conditions as to substantially dry the material obtained in step (C) and to at least partially convert said at least one compound of at least one noble metal to at least one of oxides of Pt, oxides of Pd, Pt metal and Pd metal and said at least one compound of chromium to at least one oxide of Cr; and (E) heating the material obtained in step (D) in a reducing gas atmosphere at a temperature in the range of from about 0°to about 300°C., under such conditions as to activate said material obtained in step (D) and to form said catalyst composition.