초록 ▼

Modified zeolite catalyst compositions comprising a crystalline aluminosilicate zeolite having pore windows formed by 8-membered rings of oxygen atoms, e.g. ZSM-34, in combination with a magnesium oxide, manganese oxide or magnesium oxide/platinum oxide catalyst modifier. Such modified zeolite catal

Modified zeolite catalyst compositions comprising a crystalline aluminosilicate zeolite having pore windows formed by 8-membered rings of oxygen atoms, e.g. ZSM-34, in combination with a magnesium oxide, manganese oxide or magnesium oxide/platinum oxide catalyst modifier. Such modified zeolite catalysts are especially useful for converting methanol and/or methyl ester to an olefin-containing hydrocarbon product enriched in ethylene and propylene with enhanced catalyst lifetime.

대표청구항 ▼

A catalytic process for converting with enhanced catalyst lifetime a feedstock comprising methanol, methyl ether or mixture thereof to a hydrocarbon product rich in ethylene and propylene, which process comprises contacting said feedstock under conversion conditions including a temperature between a

A catalytic process for converting with enhanced catalyst lifetime a feedstock comprising methanol, methyl ether or mixture thereof to a hydrocarbon product rich in ethylene and propylene, which process comprises contacting said feedstock under conversion conditions including a temperature between about 260°C. and 540°C., a pressure between about 0.1 psi and 300 psi and a weight hourly space velocity of the organic reactants of between about 0.1 and 30, with a catalyst comprising a ZSM-34 crystalline aluminosilicate zeolite material, said catalyst further having incorporated thereon a catalyst lifetime enhancing amount of a catalyst modifier selected from magnesium oxide, manganese oxide and combinations of magnesium oxide and platinum oxide, wherein said catalyst modifier is incorporated onto said catalyst by the steps of: (i) contacting the catalyst with a solution of the metal or metals to be incorporated thereon, whereby at least a portion of said metal or metals is adsorbed or impregnated onto said catalyst, said adsorbed or impregnated metal or metals not being incorporated onto the catalyst by an ion exchange mechanism; and (ii) heating said catalyst of step (i) in the presence of oxygen to convert said adsorbed or impregnated metal or metals to an oxide or oxides thereof.