Isomerization process

Details Isomerization process Isomerization process

1991-11-29

1993-07-13

Pal, Asok

Chemistry of hydrocarbon compounds

Plural parallel syntheses

With blending of products from two parallel reactions

585301, 585302, 585736, 585738, C07C 523

Patent

active

052275540

ABSTRACT:
A process for the isomerization of C.sub.4 and higher molecular weight hydrocarbons, preferably C.sub.4 to C.sub.6 paraffins with high C.sub.6 cyclics content. A C.sub.5 to C.sub.6 hydrocarbon stream is isomerized in a first isomerization reaction zone and a C.sub.4 hydrocarbon stream is isomerized in a second isomerization reaction zone. At least one or both of the effluent streams from the first and second isomerization zones are conveyed to a gas-liquid separator which separates a hydrogen-rich recycle stream. At least a portion of the hydrogen-rich recycle stream is conveyed to the C.sub.5 to C.sub.6 hydrocarbon feed stream and at least a portion of the hydrogen-rich recycle stream is conveyed to the C.sub.4 hydrocarbon feed stream whereby the hydrogen recycle stream is shared during both the C.sub.4 isomerization reaction and the C.sub.5 to C.sub.6 isomerization reaction. The product stream is conveyed to a shared stabilizer which removes the gaseous and volatile components. The product stream can be fractionated to recover the separate C.sub.4 to C.sub.6 isoparaffins and normal paraffins and naphthenic compounds.

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R. Meyers, Ed. Handbook of Petroleum Refining Processes, pp. 5-37 to 5-59 (1986).
N. F. Bland et al., Eds. Petroleum Processing Handbook, pp. 3-46 to 3-52 (1967).

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