Chemistry of hydrocarbon compounds – Aromatic compound synthesis – By ring formation from nonring moiety – e.g. – aromatization,...
Patent
1988-05-23
1989-10-10
Pal, Asok
Chemistry of hydrocarbon compounds
Aromatic compound synthesis
By ring formation from nonring moiety, e.g., aromatization,...
585533, C07C 212
Patent
active
048733857
ABSTRACT:
A turbulent, dense fluid-bed of a medium pore zeolite metal-losilicate catalyst, the bed having a tailored distribution of weight fractions of particles having activities which fall generally along a predetermined curve of activity distribution, is operated under low severity conditions at low WHSV, under moderate pressure and moderate severity to obtain surprisingly high conversion to C.sub.5.sup.+ hydrocarbons having an olefin content in excess of about 80%, about one third by weight of which is distillate (C.sub.9.sup.+). Only a small amount of cycloolefins and a negligibly small amount of aromatics and paraffins are produced. The distillate is formed with a single pass yield in the range from about 10-40 weight percent. The reactor is operated only in the distillate mode. The dense fluid bed has a density, measured at the bottom of the reaction zone, less than 640 kg/m.sup.3 (40 lb/ft.sup.3), and preferably operates at a temperature in the range from about 250.degree. C. (482.degree. F.) to about 371.degree. C. (700.degree. F.), and a pressure in the range from above about 200 kPa (15 psig) but below about 2800 kPa (400 psig). Despite operating under "easy" conditions, this unique process provides per pass conversion of olefins, and selectivity to C.sub.5.sup.+ hydrocarbons, each in excess of 80%.
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Avidan Amos A.
Johnson David L.
McKillop Alexander J.
Mobil Oil Corp.
Pal Asok
Speciale Charles J.
Wise Lowell G.
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