| 摘要 |
PCT No. PCT/FR89/00332 Sec. 371 Date Feb. 23, 1990 Sec. 102(e) Date Feb. 23, 1990 PCT Filed Jun. 27, 1989 PCT Pub. No. WO90/00086 PCT Pub. Date Jan. 11, 1990.A process is provided for the preparation of a catalyst which is particualrly active and selective in the oxidative conversion of methane into higher hydrocarbons and especially into C2+ hydrocarbons. In the process, an aqueous phase containing in solution cations of at least one metal of the lanthanide group and cations of at least one alkaline-earth metal, is brought into contact with a sufficient quantity of a source of carbonate ions or hydroxide ions to form a coprecipitate of carbonates and/or of hydroxycarbonates of the metals, the pH of the resulting reaction medium is brought to a value higher than 8, a coprecipitate is separated from the reaction medium, subjected to a washing operation, then to a drying operation and the washed and dried coprecipitate is subjected to calcination.
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