Isomerization process

Details Isomerization process Isomerization process

1989-02-16

1990-05-29

Caldarola, Glenn

Chemistry of hydrocarbon compounds

Saturated compound synthesis

By isomerization

585738, 585820, 585826, 208310Z, C07C 914

Patent

active

049297996

ABSTRACT:
Processing and apparatus are provided for upgrading the octane of a mixed hydrocarbon gasoline feedstock by an integrated adsorption-isomerization process which catalytically isomerizes normal paraffinic hydrocarbons and concentrates non-normals in a product stream, in both the reactor-lead and adsorber-lead configuration.
The process includes passing an adsorber feed stream comprising hydrogen as well as hydrocarbons to an adsorbent bed to adsorb normal hydrocarbons. The hydrogen is preferably obtained from a hot hydrogen-containing process stream which is not cooled or separated into component parts prior to forming the adsorber feed. In some embodiments, the hot-hydrogen containing stream comes from reactor effluent and in others from desorption effluent.
According to the invention, the only hydrogen which will require cooling and separation from a hydrocarbon component is that which is recycled for desorption. The invention provides improved energy efficiency and can reduce equipment size and complexity.

REFERENCES:
patent: 2834823 (1958-05-01), Patton et al.
patent: 2909582 (1959-10-01), Bleich et al.
patent: 3150205 (1964-09-01), Krane et al.
patent: 3422005 (1969-01-01), Avery
patent: 4210771 (1980-07-01), Holcombe
patent: 4783574 (1988-11-01), Barnes

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