Hydrocarbon hydroconversion process

Details Hydrocarbon hydroconversion process Hydrocarbon hydroconversion process

1992-02-06

1996-06-04

Myers, Helane

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Plural serial stages of chemical conversion

208210, 208217, 208254H, C10G 6510

Patent

active

055229832

ABSTRACT:
A process is provided for converting a hydrocarbon feedstock comprising the steps of introducing the hydrocarbon feedstock to a first hydroconversion zone at superatmospheric pressure and at a temperature between about 450.degree. F. and about 850.degree. F. in the presence of hydrogen, the hydrogen flowing in a countercurrent relationship to the hydrocarbon feedstock, to form a hydrogen-rich vapor effluent and a hydrocarbon-rich liquid effluent; reacting the hydrogen-rich vapor effluent in a second hydroconversion zone to form a converted vapor effluent; and introducing a portion of the hydrocarbon-rich liquid effluent to the second hydroconversion zone in countercurrent relationship to the hydrogen-rich vapor effluent. By recycling to the second hydroconversion zone a stream having sufficiently high boiling range that it remains a liquid, a greater range of operating conditions are possible in the second hydroconversion zone, thus allowing for higher conversions and product yields.

REFERENCES:
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patent: 3673078 (1972-06-01), Kirk, Jr.
patent: 3788976 (1974-01-01), Kirk, Jr.
patent: 3843508 (1974-10-01), Wilson et al.
patent: 3846278 (1974-11-01), Sze et al.
patent: 3897329 (1975-07-01), Franz et al.
patent: 5110444 (1992-05-01), Haun et al.

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