Catalyst and process for making same |
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| 申请号 | US35609473 | 申请日 | 1973-05-01 | 公开(公告)号 | US3909455A | 公开(公告)日 | 1975-09-30 |
| 申请人 | PHILIP MORRIS INC; | 发明人 | RAINER NORMAN B; WILSON PETER ALLEN; | ||||
| 摘要 | A catalyst is provided which is remarkably effective for catalyzing the oxidation of carbon monoxide to carbon dioxide at ambient conditions. This catalyst is prepared by contacting high surface area alumina with a solution of a cobalt compound (e.g., cobalt nitrate), adsorbing the cobalt compound on the alumina, removing the solvent, and thereafter heating the cobalt-treated alumina at a temperature of 400*C to 1,300*C in an oxygenproviding environment. | ||||||
| 权利要求 | 1. A ROOM TEMPERATURE CATALYST CAPABLE OF CONVERTING CARBON MONOXIDE TO CARBON DIOXIDE IN THE PRESENCE OF AMBIENT OXYGEN COMPRISING AN ALUMINA SUPPORT HAVING A SURFACE AREA OF ABOUT 100 TO ABOUT 400 SQUARE METERS PER GRAM AND FROM ABOUT 0.5 TO ABOUT 15 PERCENT BY WEIGHT COBALT ADSORBED ON SAID ALUMINA IN THE FORM OF A BLUE COBALT ALUMINATE SPINEL HAVING LABILE MOLECULAR OXYGEN, SAID CATALYST CONTAINING SUBSTANTIALLY NO MOISTURE. 2. A catalyst as in claim 1 in the form of granular material having a mesh size of from about 4 to about 200. 3. A catalyst as in claim 1 where the alumina contains less than about 10 percent by weight of SiO2. 4. A process for the production of a catalyst which process comprises: a. contacting an alumina support having a surface area of from about 100 to about 400 square meters per gram with a solution of a cobaltous compound until from about 0.5 to about 15 weight percent cobalt has been deposited on said alumina, b. removing the solvent from said treated alumina, c. heating the resultant treated alumina in a stream of an oxygen-providing gas at a temperature of from about 400*C to about 1,300*C for at least 30 minutes, and d. cooling the resultant treated alumina in a substantially moisture-free atmosphere to room temperature. 5. The process of claim 4 wherein said cobaltous compound solution is a solution of cobalt in an organic solvent. 6. The process of claim 4 wherein said oxygen-providing gas is selected from the group consisting of air, oxygen and nitrous oxide. 7. The process of claim 4 wherein said oxygen-providing gas is nitrous oxide. 8. The process of claim 4 wherein said treated alumina is heated at a temperature of from about 600*C to about 1,000*C. 9. The process of claim 5 wherein said treated alumina is heated at a temperature of from about 600*C to about 1,000*C. 10. The process of claim 9 wherein said solvent is acetone and said oxygen-providing atmosphere is nitrous oxide. |
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