AMMONIA SYNTHESIS CATALYST, METHOD OF PREPARATION THEREOF, AND AMMONIA SYNTHESIS PROCESS Russian patent published in 1999 - IPC

FIELD: industrial inorganic synthesis. SUBSTANCE: catalyst contains (i) carrier - carbon material constituting a three- dimensional carbon matrix with pore volume 0.2-1.7 cu.cm/g formed by tape carbon layers with thickness 100 to 10000 and radius of curvature 100 to 10000 possessing true density 1.80-2.10 g/cu.cm, x-ray density 2.112-2.236 g/cu.cm, and biporous structure with pore distribution having additional maximum within a range of 40 to 200 ; (ii) 1 to 15% (based on metal weight) of at least one alkali or alkali- earth metal (K, Cs, Ba) compound; (iii) 1 to 8% (based on metal weight) of at least one ruthenium compound; and (iv) not more than 7% oxygen. Method of preparing catalyst includes successively impregnating carbon carrier with ruthenium compound solutions, impregnating with promoting alkali and alkali-earth metal compounds, reduction of catalyst, drying, and calcination. According to invention, initial ruthenium compound solutions are those of ruthenium compound complexes with mono- and, preferably, polydentate nitrogen- or oxygen-containing ligands; carbon carrier is a material constituting above-defined three-dimensional matrix; catalyst is reduced to content of oxygen in catalyst not higher than 7 wt %. Process of ammonia synthesis is based on nitrogen-hydrogen interaction at elevated temperatures and pressures on above-defined catalyst. EFFECT: increased mechanical strength and activity of catalyst. 6 cl, 2 tbl, 24 ex