Catalyst – solid sorbent – or support therefor: product or process – Zeolite or clay – including gallium analogs – And additional al or si containing component
Patent
1981-12-04
1984-01-24
Dees, Carl F.
Catalyst, solid sorbent, or support therefor: product or process
Zeolite or clay, including gallium analogs
And additional al or si containing component
208111, 502 70, 502 74, B01J 2928
Patent
active
044275773
ABSTRACT:
Catalyst compositions comprising a core of silica with an overlying modified-silica zeolite, preferably containing aluminium, gallium or boron, show improved catalytic activity. The composites are prepared by introducing preformed silica particles, preferably with a crystallite size greater than 0.1 .mu., into a reaction mixture comprising a silicon source, a source of the modifying element, and preferably an organic template such as a tetraalkylammonium compound to form the modified-silica zeolite with a constraint index of from 1 to 12. The weight ratio of the silica core to SiO.sub.2 in the reaction mixture is preferably 1:1 to 10:1.
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Dees Carl F.
Exxon Research & Engineering Co.
Yablonsky R.
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