Process for the selective conversion of naphtha to aromatics and

Details Process for the selective conversion of naphtha to aromatics and Process for the selective conversion of naphtha to aromatics and

1993-04-27

1994-03-08

McFarlane, Anthony

Chemistry of hydrocarbon compounds

Plural serial diverse syntheses

To produce aromatic

585324, 585651, 585653, 208 62, 208100, C07C 400, C07C 406, C10G 6304

Patent

active

052929760

ABSTRACT:
A staged process has been discovered for the selective conversion of paraffins in naphtha to aromatics and conversion of naphthenes in naphtha to olefins. In a first stage, n-paraffins in naphtha are converted to aromatics over modified non acidic zeolite catalyst particles with a low conversion of naphthenes in the feedstream. The effluent from the first stage is cascaded to a second stage reactor containing acidic zeolite catalyst wherein naphthenes are converted to light olefins. Advantageously, the process of the invention results in a reduction in the production of light C.sub.1 -C.sub.4 paraffins compared to the prior art. The preferred catalyst for the first stage is a platinum modified zeolite containing tin.

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