Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1978-04-07
1979-01-23
O'Keefe, Veronica
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
208139, 252439, 252442, 252455R, 252466B, 260668D, 423 21, C07C 540, C07C 1508, B01J 2310, B01J 2394
Patent
active
041361300
ABSTRACT:
Dehydrocyclizable hydrocarbons are converted to aromatics by contacting them at dehydrocyclization conditions with an acidic multimetallic catalytic composite comprising a combination of catalytically effective amounts of a platinum group component, a cobalt component, a lanthanide series component, and a halogen component with a porous carrier material. The platinum group, cobalt, lanthanide series and halogen components are present in the multimetallic catalyst in amounts respectively, calculated on an elemental basis, corresponding to about 0.01 to about 2 wt. % platinum group metal, about 0.05 to about 5 wt. % cobalt, about 0.01 to about 5 wt. % lanthanide series metal, and about 0.1 to about 3.5 wt. % halogen. Moreover, the catalytically active sites induced by these metallic components are uniformly dispersed throughout the porous carrier material and these metallic components are present in the catalyst in carefully controlled oxidation states such that substantially all of the platinum group component is in the elemental metallic state, substantially all of the lanthanide series component is in an oxidation state above that of the elemental metal, and substantially all of the catalytically available cobalt component is present in the elemental metallic state or in a state which is reducible to the elemental metallic state under dehydrocyclization conditions, or in a mixture of these states. A specific example of dehydrocyclization method disclosed herein is a method for converting a feed mixture of n-hexane and n-heptane to a product mixture of benzene and toluene which involves contacting the feed mixture and a hydrogen stream with the acidic multi-metallic catalyst disclosed herein at dehydrocyclization conditions.
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Hoatson Jr. James R.
McBride Thomas K.
O'Keefe Veronica
Page II William H.
Schmitkons G. E.
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