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US 8,148,292 B2Granted
Preparation of high activity cobalt catalysts, the catalysts and their use
AssigneeExxonMobil Research and Engineering Company
InventorsStuart L. Soled, Joseph E. Baumgartner, Christine E. Kliewer, El-Mekki El-Malki, Patricia A. Bielenberg
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Abstract
A method is provided for preparing a supported cobalt-containing catalyst having substantially homogenously dispersed, small cobalt crystallites. The method comprises depositing cobalt nitrate on a support and then heating the support in an oxygen-containing, substantially water-free atmosphere to about 160° C. to form an intermediate decomposition product. This intermediate decomposition product is then calcined and reduced.
Claims13
A method for preparing a cobalt-containing catalyst, the method comprising:
- a. impregnating a catalyst support with an aqueous solution of cobalt nitrate;
- b. drying the cobalt-impregnated support;
- then subjecting the dried cobalt-impregnated support to a two step decomposition process comprising:
- c. heating the dried support in an oxygen-containing atmosphere that is substantially free of water and is free of added NO, said heating being at a temperature and for a time sufficient to show infrared peaks developing at 1820 cm−1 to 1877 cm−1 and at a temperature at which only a first endotherm of nitrate decomposition occurs and for a time sufficient for the dried support to pass through only the first endotherm of the nitrate decomposition thereby providing an intermediate material;
- and
- d. calcining the intermediate material to form cobalt oxide;
- and
- then, reducing the calcined catalyst to obtain a cobalt-containing catalyst.
5 more elements
Dependencies are inferred from the claim text.