Process for selective oxidation of carbon monoxide in a hydrogen containing stream
View Patent ↗A method of making a composition, said method comprising, spraying a substance comprising platinum and iron into or onto an alumina-containing compound is disclosed. The resulting composition can then be used in a process for oxidizing carbon monoxide with free oxygen.
1. A method of making a composition comprising the steps of:
a) incorporating a hydrocarbon into the pores of an alumina-containing compound such that at least half of the pore volume of said alumina-containing compound contains said hydrocarbon;
b) spraying a substance comprising platinum and iron into or onto said alumina-containing compound to form a sprayed support;
c) contacting said sprayed support with a sulfide selected from the group consisting of hydrogen sulfide and an alkyl-sulfide to form a sulfided support;
d) calcining said sulfided support to form a calcined support;
e) contacting said calcined support with steam to form a steamed support; and
f) reducing said steamed support to form said composition.
2. A method in accordance with claim 1 wherein said sulfide is hydrogen sulfide.
3. A method in accordance with claim 1 wherein said sulfide is an alkyl sulfide.
4. A method in accordance with claim 3 wherein said alkyl sulfide is dimethyl sulfide.
5. A method in accordance with claim 1 further comprising repeating step (a) and step (b).
6. A method in accordance with claim 1 wherein said hydrocarbon in step (a) is selected from the group consisting of alkanes, alkenes and aryls.
7. A method in accordance with claim 1 wherein said hydrocarbon in step (a) is pentane.
8. A method in accordance with claim 1 wherein said contacting of said sulfided support with steam occurs during said calcining of step (d).
9. A method in accordance with claim 1 wherein said contacting of said sulfided support with steam of step (e) occurs during said reducing of step (f).
10. A method in accordance with claim 1 wherein said sulfided support is calcined in step (d) at a temperature in the range of from about 150° C. to about 700° C.
11. A method in accordance with claim 1 wherein said steamed support is reduced in step (f) under reducing conditions which include a temperature in the range of from about 20° C. to about 650° C.
12. A method in accordance with claim 1 wherein said steamed support is reduced in step (f) under reducing conditions which include a temperature in the range of from about 200° C. to 500° C.