| abstract |
A sintered catalyst article is prepared by: n molding into a shaped article and aging (I) either n A. a refractory powder of calcium aluminate substantially free of silicon dioxide, alone, or n B. a homogenous mixture of n 1. said refractory powder and n 2. at least one member selected from the group consisting of aluminum oxide, calcium oxide, beryllium oxide, magnesium oxide, strontium oxide and a compound which is converted by heating to one of said oxides; n (II) sintering said molded and aged article at a temperature above 1150°C; n the thus sintered catalyst article containing 10 to 60 wt. percent of calcium oxide, 30 to 90 wt. percent of aluminum oxide, 0 to 30 wt. percent of at least one oxide selected from the group consisting of beryllium oxide, magnesium oxide and strontium oxide, and less than 0.2 wt. percent of silicon dioxide. |