초록 ▼

An improved process is provided for forming ketones from the corresponding olefins in the vapor phase in the presence of water vapor employing a heterogeneous catalyst comprising a molybdenum disulfide catalyst formed by the thermal decomposition of a thiomolybdate compound. It has been surprisingly

An improved process is provided for forming ketones from the corresponding olefins in the vapor phase in the presence of water vapor employing a heterogeneous catalyst comprising a molybdenum disulfide catalyst formed by the thermal decomposition of a thiomolybdate compound. It has been surprisingly found that these catalysts effect the formation of ketones in high selectivities with minimal selectivities to the undesirable carbon dioxide and carbon monoxide by-products.

대표청구항 ▼

An improved process for preparing ketones which comprises contacting an olefin in the gaseous phase in the substantial absence of free molecular oxygen in the presence of water vapor and in the additional presence of a molybdenum sulfides catalyst, prepared by the thermal decomposition of a thiomoly

An improved process for preparing ketones which comprises contacting an olefin in the gaseous phase in the substantial absence of free molecular oxygen in the presence of water vapor and in the additional presence of a molybdenum sulfides catalyst, prepared by the thermal decomposition of a thiomolybdate compound, under conditions sufficient to form the corresponding ketone from said olefin, said olefin comprising a member selected from the group consisting of linear mono-olefins of from 2 to 20 carbon atoms and cyclic monoolefins of from 3 to 20 carbon atoms, said thiomolybdate compound comprising at least one member selected from the group consisting of ammonium salts of molybdenum-sulfur cluster anions and compounds of the formula: [R1(R2)N(R3)R4]2MoOxS4-x wherein R1, R2, R3 and R4 can be the same or different and are hydrogen, alkyl, aryl, alkaryl, aralkyl, cycloalkyl, substituted derivatives of the above groups and mixtures thereof, and x is 0, 1 or 2, and said thermal decomposition being conducted at a temperature of from about 150°to 600°C. An improved process for preparing ketones which comprises contacting an olefin in the gaseous phase, in the substantial absence of H2S, in the presence of water vapor and molecular oxygen and in the additional presence of a molybdenum sulfides catalyst, prepared by the thermal decomposition of a thiomolybdate compound, under conditions sufficient to form the corresponding ketone from said olefin, said olefin comprising a member selected from the group consisting of linear mono-olefins of from 2 to 20 carbon atoms and cyclic monoolefins of from 3 to 20 carbon atoms, said thiomolybdate compound comprising at least one member selected from the group consisting of ammonium salts of molybdenum-sulfur cluster anions and compounds of the formula: [R1(R2)N(R3)R4]2MoOxS4-x wherein R1, R2, R3 and R4 can be the same or different and are hydrogen, alkyl, aryl, alkaryl, aralkyl, cycloalkyl, substituted derivatives of the above groups and mixtures thereof, and x is 0, 1 or 2, and said thermal decomposition being conducted at a temperature of from about 150°to 600°C.