Chromia alumina catalysts for alkane dehydrogenation
AssigneeBASF SE
InventorsWolfgang Ruettinger, Richard Jacubinas
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Abstract
Provided are methods of making dehydrogenation catalyst supports containing bayerite and silica. Silica-stabilized alumina powder, prepared by spray drying of bayerite powder, precipitating silica in a bayerite slurry with an acid, or impregnation or co-extrusion of bayerite with sodium silicate solution was found to be a superior catalyst support precursor. Catalysts prepared with these silica containing support materials have higher hydrothermal stability than current CATOFIN® catalysts. Also provided is a dehydrogenation catalyst comprising Cr2O3, an alkali metal oxide, SiO2 and Al2O3, and methods of using said catalyst to make an olefin and/or dehydrogenate a dehydrogenatable hydrocarbon.
Claims27
A method of making a dehydrogenation catalyst support, the method comprising:
- doping bayerite with silica, wherein the bayerite is doped by spray-drying bayerite powder in the presence of silica;
- shaping the silica-doped bayerite;
- and
- calcining the shaped silica-doped bayerite to form alumina.
A method of making a dehydrogenation catalyst support, the method comprising:
- mixing bayerite with a silica source;
- shaping the bayerite mixed with the silica source;
- and
- calcining the shaped mixture to form alumina.
A method of making a dehydrogenation catalyst support, the method comprising:
- mixing bayerite with a silica source;
- shaping the bayerite mixed with the silica source, wherein the silica source is an alkali silicate, and bayerite is mixed with the alkali silicate before extrusion;
- and
- calcining the shaped mixture to form alumina.
A method of making a dehydrogenation catalyst support, the method comprising:
- mixing a silica source and a bayerite slurry to form a mixture;
- precipitating silica with an acid;
- shaping the mixture;
- and
- calcining the shaped mixture to form alumina.
A method of making a dehydrogenation catalyst support, the method comprising:
- mixing a silica source and a bayerite slurry to form a mixture, wherein the silica source is an alkali silicate;
- precipitating silica with an acid;
- shaping the mixture;
- and
- calcining the shaped mixture to form alumina.
Dependencies are inferred from the claim text.