Continuous process for the oxidative coupling of methane to C.sub.2+ hydrocarbons in the presence of catalysts
AssigneeManfred Baerns
InventorsManfred Baerns, Joao A. da Silva Palla Carreiro, Wilfried Bytyn
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Abstract
A continuous process for the catalytic oxidative coupling in the presence of oxygen or an oxygen containing gas to C.sub.n H.sub.m hydrocarbons (n.gtoreq.2, m=2n or 2n+2) at temperatures between 500.degree. and 900.degree. C., with partial pressures of methane above 0.5 bar and a ratio of the partial pressures of methane and oxygen between 1 and 20 is described. This process uses oxides, peroxides, hyperoxides, hydroxides, carbonates, sulfates, phosphates and silicates of the elements belonging to the 1., 2. and 4. main group of the periodic system as catalysts with and without a support material.
Claims24
A continuous process for the heterogeneously catalyzed oxidative coupling of methane in the presence of oxygen or an oxygen-containing gas to Cn Hm hydrocarbons (n.gtoreq. 2, m=2n or 2n+2) the steps of which comprise, introducing methane and oxygen or an oxygen-containing gas into a reactor, maintaining reaction zone conditions of temperatures between 500.degree. and 900.degree. C., methane partial pressures larger than 0.5 bar and a ratio of partial pressures of methane and oxygen or an oxygen-containing gas with supported or unsupported catalysts, comprising oxides, peroxides, hyperoxides, hydroxides, carbonates, sulfates, phosphates and silicates of elements selected from the group consisting of Li, Na, K, Rb, Cs and Be, peroxides, hyperoxides, hydroxides, carbonates, sulfates, phosphates and silicates of elements selected from the group consisting of Sr and Ba and the carbonates, sulfates, phosphates and silicates of elements selected from the group consisting of Pb, Sn, Ge, Mg and Ca.
A continuous process for the heterogeneously catalyzed oxidative coupling of methane in the presence of oxygen or an oxygen-containing gas to C.sub.n H.sub.M hydrocarbons ((n.gtoreq.2, m=2n or 2n+2) the steps of which comprise, introducing methane and oxygen or an oxygen-containing gas into a reactor, maintaining reaction zone conditions of temperatures between 500.degree. C. and 900.degree. C., methane partial pressures larger than 0.5 bar and a ratio of partial pressures of methane and oxygen between 1 and 20, and contacting methane and oxygen or an oxygen-containing gas with supported or unsupported catalysts, comprising oxides, peroxides, hyperoxides, hydroxides, carbonates, sulfates, phosphates and silicates of elements selected from the group consisting of Li, Na, K, Rb, Cs and Be, peroxides, hyperoxides, hydroxides, carbonates, sulfates, phosphates and silicates of elements selected from the group consisting of Sr and Ba and the carbonates, sulfates, phosphates and silicates of elements selected from the group consisting of Pb, Sn, Ge, Mg and Ca.
A continuous process for the heterogeneously catalyzed oxidative coupling of methane in the presence of oxygen or an oxygen-containing gas to C.sub.n H.sub.m hydrocarbons (n.gtoreq.2, m=2n or 2n+2) the steps of which comprise, introducing methane and oxygen or an oxygen-containing gas into a reactor, maintaining reaction zone conditions of temperatures between 500.degree. and 900.degree. C., methane partial pressures larger than 0.5 bar and a ratio of partial pressures of methane and oxygen between 1 and 20, and containing methane and oxygen or an oxygen-containing gas with supported or unsupported catalysts, comprising oxides, peroxides, hyperoxide, hydroxides, carbonates, sulfates, phosphates and silicates of elements selected from the group consisting of Li, Na, K, Rb, Cs and Be, and the carbonates, sulfates, phosphates and silicates of elements selected from the group consisting of PB, Sn, Ge, Mg, Ca, Ba and Sr.
Dependencies are inferred from the claim text.