Catalyst – solid sorbent – or support therefor: product or process – Zeolite or clay – including gallium analogs – Activating treatment
Patent
1991-11-12
1993-03-02
McFarlane, Anthony
Catalyst, solid sorbent, or support therefor: product or process
Zeolite or clay, including gallium analogs
Activating treatment
502 63, 502224, 502232, 502246, B01J 2904, B01J 2108, B01J 2706
Patent
active
051909049
ABSTRACT:
Paraffin alkylation using solid, particulate catalyst is carried out by preparing an alkane-catalyst mixture in a wash zone, passing the alkane-catalyst mixture to a plug flow reactor where a minor amount of olefin is introduced to contact the alkane-catalyst mixture and react to form alkylate and the alkane-catalyst-alkylate mixture is passed through the reactor with a minimum of back mixing to restrict the reaction of alkylate with olefin, thus substantially preventing polymerization. The alkane-catalyst-alkylate mixture, substantially free of olefin is passed to a disengaging zone where the liquid is removed and the solid particulate catalyst is recovered and returned to the wash zone for recycle. The alkane is present in the reactor in sufficient molar excess to react substantially all of the olefin. Any unreacted isoalkane is recycled to the reactor with make-up isoalkane added to maintain the molar excess. The preferred catalyst is an acid washed silica treated with antimony pentafluoride and more preferably treated with alkane at low temperature, e.g. -30.degree. to -160.degree. C.
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Crossland Clifford S.
Johnson Alan
Pitt Elliot G.
Woods John
Chemical Research & Licensing Company
Johnson Kenneth H.
McFarlane Anthony
Phan Nhat D.
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