Chemistry of hydrocarbon compounds – Unsaturated compound synthesis – By addition of entire unsaturated molecules – e.g.,...
Patent
1988-09-29
1989-08-08
Davis, Curtis R.
Chemistry of hydrocarbon compounds
Unsaturated compound synthesis
By addition of entire unsaturated molecules, e.g.,...
585533, 585716, 585722, C07C 202
Patent
active
048555240
ABSTRACT:
A process is disclosed for combining the operation of (i) a primary reactor (referred to as a "MOG" reactor), in which an olefin-containing light gas or light naphtha is oligomerized to gasoline range hydrocarbons, and, (ii) a high pressure secondary reactor (referred to as a "MODL" reactor), to make distillate or lubes, using the effluent (primary effluent) from the MOG reactor as feed for the MODL reactor. In the distillate mode, the primary effluent is tailored so as to be substantially free (less than 3 mol %) of C.sub.10.sup.+ components. Because the C.sub.10.sup.+ "make" from the MOG reactor is spared passage through the MODL reactor, conversion of the C.sub.10.sup.+ components typically experienced due to cracking and oligomerization in the MODL is avoided. Because the C.sub.4.sup.- light components which are highly paraffinic, are separated from the primary effluent in a debutanizer to provide a mainly C.sub.5 -C.sub.9 stream, conversion of olefins to distillate in the MODL reactor is enhanced relative to using a feed, not tailored as described, to the MODL reactor. The yield of desired C.sub.10.sup.+ product is surprisingly high. In addition, the throughput to the MODL reactor is substantially reduced. Various embodiments of the process are disclosed to provide economic processes to meet the challenge of oligomerizing lower olefins to distillate and lubes.
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Harandi Mohsen N.
Owen Hartley
Davis Curtis R.
McKillop Alexander J.
Mobil Oil Corporation
Speciale Charles J.
Wise L. G.
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