Methods for producing cobalt/molybdenum catalysts having enhanced selectivity for the production of C.sub.3-C.sub.4 alcohols. The catalyst production methods allow for the selective production of beta-phase catalysts over alpha-phase catalysts. The catalyst is a calcined composition comprising: -CoxMoyOz, wherein x ranges from 0.5 to 2.0, y ranges from 0.5 to 2.0, and z ranges from 3.5 to 4.5, wherein said calcined composition is essentially free of catalytically-active amounts of beta-molybdenum carbide (-Mo2 C), and wherein said calcined composition is essentially free of catalyst-promoting amounts of an alkaline metal promoter or alkaline earth metal promoter.

Methods for producing cobalt/molybdenum catalysts having enhanced selectivity for the production of C.sub.3-C.sub.4 alcohols. The catalyst production methods allow for the selective production of beta-phase catalysts over alpha-phase catalysts. The catalyst is a calcined composition comprising: -CoxMoyOz, wherein x ranges from 0.5 to 2.0, y ranges from 0.5 to 2.0, and z ranges from 3.5 to 4.5, wherein said calcined composition is essentially free of catalytically-active amounts of beta-molybdenum carbide (-Mo2 C), and wherein said calcined composition is essentially free of catalyst-promoting amounts of an alkaline metal promoter or alkaline earth metal promoter.

Methods for producing cobalt/molybdenum catalysts having enhanced selectivity for the production of C.sub.3-C.sub.4 alcohols. The catalyst production methods allow for the selective production of beta-phase catalysts over alpha-phase catalysts. The catalyst is a calcined composition comprising: -CoxMoyOz, wherein x ranges from 0.5 to 2.0, y ranges from 0.5 to 2.0, and z ranges from 3.5 to 4.5, wherein said calcined composition is essentially free of catalytically-active amounts of beta-molybdenum carbide (-Mo2 C), and wherein said calcined composition is essentially free of catalyst-promoting amounts of an alkaline metal promoter or alkaline earth metal promoter.

The present disclosure relates generally to compositions and processes for producing Fischer-Tropsch catalysts. In particular, the disclosure provides for a process for producing a product composition comprising alcohols and liquid hydrocarbons via a Fischer-Tropsch synthesis reaction, the process comprising: contacting a mixture of hydrogen and a gaseous carbon oxide that is carbon monoxide, carbon dioxide or a combination thereof and an olefin co-feed with a supported cobalt-manganese Fischer-Tropsch synthesis catalyst to provide the product composition; wherein the olefin co-feed comprises at least one C.sub.2-C.sub.14 olefin and is present in an amount in the range of 0.001 wt % to 40 wt % relative to the total amount of hydrogen, the gaseous carbon oxide and olefin; wherein a weight ratio of manganese to cobalt in the catalyst is at least 0.05 on an elemental basis.

The present disclosure relates generally to compositions and processes for producing Fischer-Tropsch catalysts. In particular, the disclosure provides for a process for producing a product composition comprising alcohols and liquid hydrocarbons via a Fischer-Tropsch synthesis reaction, the process comprising: contacting a mixture of hydrogen and a gaseous carbon oxide that is carbon monoxide, carbon dioxide or a combination thereof and an olefin co-feed with a supported cobalt-manganese Fischer-Tropsch synthesis catalyst to provide the product composition; wherein the olefin co-feed comprises at least one C.sub.2-C.sub.14 olefin and is present in an amount in the range of 0.001 wt % to 40 wt % relative to the total amount of hydrogen, the gaseous carbon oxide and olefin; wherein a weight ratio of manganese to cobalt in the catalyst is at least 0.05 on an elemental basis.

The present disclosure relates generally to compositions and processes for modifying Fischer-Tropsch product selectivity. In particular, the disclosure provides for a for converting a mixture of hydrogen and carbon monoxide gases to a product composition comprising alcohols and liquid hydrocarbons via Fischer-Tropsch synthesis in the presence of a supported cobalt-manganese Fischer-Tropsch synthesis catalyst, the process comprising: contacting the catalyst with a first gaseous feed comprising carbon monoxide and hydrogen for at least 12 hours to provide via Fischer-Tropsch synthesis a first product composition comprising C.sub.5+ hydrocarbons and alcohol; then contacting the catalyst with a first selectivity gaseous composition comprising at least 35 vol % H.sub.2 and a H.sub.2:CO molar ratio of at least 2; and then contacting the catalyst with a second gaseous feed comprising carbon monoxide and hydrogen to provide a second product composition comprising C.sub.5+ hydrocarbons, with a selectivity of no more than 5% for alcohols. Optionally, the catalyst selectivity to alcohols can be reversed by contacting the catalyst with a second selectivity gaseous composition comprising CO or a H.sub.2:CO molar ratio of at below 1.5.

The present disclosure relates generally to compositions and processes for modifying Fischer-Tropsch product selectivity. In particular, the disclosure provides for a for converting a mixture of hydrogen and carbon monoxide gases to a product composition comprising alcohols and liquid hydrocarbons via Fischer-Tropsch synthesis in the presence of a supported cobalt-manganese Fischer-Tropsch synthesis catalyst, the process comprising: contacting the catalyst with a first gaseous feed comprising carbon monoxide and hydrogen for at least 12 hours to provide via Fischer-Tropsch synthesis a first product composition comprising C.sub.5+ hydrocarbons and alcohol; then contacting the catalyst with a first selectivity gaseous composition comprising at least 35 vol % H.sub.2 and a H.sub.2:CO molar ratio of at least 2; and then contacting the catalyst with a second gaseous feed comprising carbon monoxide and hydrogen to provide a second product composition comprising C.sub.5+ hydrocarbons, with a selectivity of no more than 5% for alcohols. Optionally, the catalyst selectivity to alcohols can be reversed by contacting the catalyst with a second selectivity gaseous composition comprising CO or a H.sub.2:CO molar ratio of at below 1.5.

Higher mixed alcohols are produced from syngas contacting a catalyst in a reactor. The catalyst has a first component of molybdenum or tungsten, a second component of vanadium, a third component of iron, cobalt, nickel or palladium and optionally a fourth component of a promoter. The first component forms alcohols, while the vanadium and the third component stimulates carbon chain growth to produce higher alcohols.

Higher mixed alcohols are produced from syngas contacting a catalyst in a reactor. The catalyst has a first component of molybdenum or tungsten, a second component of vanadium, a third component of iron, cobalt, nickel or palladium and optionally a fourth component of a promoter. The first component forms alcohols, while the vanadium and the third component stimulates carbon chain growth to produce higher alcohols.

Higher mixed alcohols are produced from syngas contacting a catalyst in a reactor. The catalyst has a first component of molybdenum or tungsten, a second component of vanadium, a third component of iron, cobalt, nickel or palladium and optionally a fourth component of a promoter. The first component forms alcohols, while the vanadium and the third component stimulates carbon chain growth to produce higher alcohols.