Two-stage catalytic hydroconversion of hydrocarbon feedstocks us

Details Two-stage catalytic hydroconversion of hydrocarbon feedstocks us Two-stage catalytic hydroconversion of hydrocarbon feedstocks us

1982-08-18

1984-07-03

Garvin, Patrick

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Plural serial stages of chemical conversion

208157, 208158, 208161, 208162, 208251R, C10G 4726

Patent

active

044578318

ABSTRACT:
A two-stage catalytic hydroconversion process for heavy hydrocarbon feedstocks usually containing fine particulate solids to produce lower boiling hydrocarbon liquid and gas products. The feedstock is fed into a first stage ebullated bed reactor containing fine sized catalyst and operated at moderate reaction conditions for hydroconversion to produce hydrocarbon gas and liquid fractions, from which a low boiling liquid fraction is separated and withdrawn as a product. The remaining gas and heavier liquid fractions are recombined and fed to a second stage ebullated bed reactor containing larger size catalyst for further hydroconversion reactions at less severe conditions to produce lower boiling hydrocarbon liquid fractions. Following product distillation steps, liquid product fractions are withdrawn and a portion of vacuum bottoms material is recycled to the second stage reactor to provide increased hydroconversion and improved yields of the light hydrocarbon liquid product.

REFERENCES:
patent: 3412010 (1968-11-01), Alpert et al.
patent: 3418234 (1968-12-01), Chervenak et al.
patent: 3844933 (1974-10-01), Wolk et al.
patent: 3870623 (1973-03-01), Johnson et al.
patent: 3893911 (1975-07-01), Rovesti et al.
patent: 3901792 (1975-08-01), Wolk et al.
patent: 3910834 (1975-10-01), Anderson
patent: 4271007 (1981-06-01), Souhradaa

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