| 摘要 |
The process of preparation is described of a Fischer-Tropsch catalytic precursor based on cobalt supported on alumina, which comprises: a) treatment of the alumina optionally containing up to 10% by weight of silica, with a solution, optionally etanol, of a silicon compound selected from those having general formula (I) Si(OR)R'(I), wherein n ranges from 1 to 3, wherein R' is selected from primary hydrocarbyl radicals having from 1 to 20 carbon atoms, wherein R is selected from primary hydrocarbyl radicals having from 1 to 6 carbon atoms; b) drying and subsequent calcination of the modified carrier obtained at the end of step (a) thus obtaining a silanized carrier; c) subsequent deposition of cobalt on the silanized carrier obtained at the end of step (b); d) drying and subsequent calcination of the supported cobalt obtained at the end of step (c) thus obtaining the final catalytic precursor; the above final catalytic precursor having a content of SiOderiving from the compound having general formula (I) ranging from 4.5 to 10% by weight. The use is offered as well of the catalytic precursor obtained by this process and subjected to the subsequent reduction in hydrogen as a catalyst in Fischer-Tropsch processes. |
