초록 ▼

A catalyst or precursor thereto comprising cobalt and/or a cobalt compound on a transition alumina support having a total cobalt content of at least 41% by weight and a cobalt surface area, after reduction, greater than 25 m2 per gram of total cobalt. The catalyst or precursor may be made by slurryi

A catalyst or precursor thereto comprising cobalt and/or a cobalt compound on a transition alumina support having a total cobalt content of at least 41% by weight and a cobalt surface area, after reduction, greater than 25 m2 per gram of total cobalt. The catalyst or precursor may be made by slurrying a transition alumina powder having a pore volume of at least 0.7 ml/g with an aqueous cobalt ammine carbonate complex and heating the slurry to decompose the complex.

대표청구항 ▼

1. A particulate catalyst precursor comprising cobalt compounds supported on a transition alumina support and having a total cobalt content of 20 to 85% by weight, a pore volume above 0.5 ml/g, and a surface-weighted mean diameter D[3,2] in the range 1 μm and which, upon reduction, has a cobalt surf

1. A particulate catalyst precursor comprising cobalt compounds supported on a transition alumina support and having a total cobalt content of 20 to 85% by weight, a pore volume above 0.5 ml/g, and a surface-weighted mean diameter D[3,2] in the range 1 μm and which, upon reduction, has a cobalt surface area of at least 40 m2 per gram of total cobalt.2. A catalyst precursor according to claim 1 having a total cobalt content above 40% by weight.3. A catalyst precursor according to claim 1 having a surface-weighted mean diameter D[3,2] below 20 μm.4. A catalyst precursor according to claim 1 having an average pore diameter of at least 8 nm.5. A catalyst precursor according to claim 1 wherein the cobalt is present as cobalt oxides.6. A catalyst presursor according to claim 1 having a total cobalt content above 50% by weight and wherein the alumina is a gamma alumina.