| 摘要 |
FIELD: chemistry.SUBSTANCE: invention relates to Fischer-Tropsch catalyst precursor comprising a support and cobalt on said support, to Fischer-Tropsch catalysts, a method of producing catalyst precursors and use of carboxylic acid in said method. Catalyst precursor comprises (i) a catalyst support, containing silicon oxide and 11-18 wt% TiO; and (ii) cobalt on said catalyst support. Other precursor comprises (i) catalyst support, including silicon oxide and TiO; and (ii) 35-60 wt% Co in form of CoOon said catalyst support, where average particle diameter CoOis less than 12 nm, defined by XRD, and C-value of logarithmically normal distribution of particle size of CoOranges from 0.19 to 0.31; or (b) D-value of logarithmically normal distribution of particle size ranges from 19 to 23.5. Method of producing catalyst precursor comprises following steps: precipitating solution or suspension containing at least one metal catalyst precursor and carboxylic acid, on catalyst support; drying catalyst support, on which said solution or suspension was precipitated; and calcining catalyst support, on which was deposited said solution or suspension, in oxygen-containing atmosphere.EFFECT: technical result is low rate of catalyst deactivation.41 cl, 30 dwg, 7 tbl |
