Multi-stage hydroprocessing with multi-stage stripping in a sing

Details Multi-stage hydroprocessing with multi-stage stripping in a sing Multi-stage hydroprocessing with multi-stage stripping in a sing

1996-12-31

1998-02-24

Therkorn, Ernest G.

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Plural serial stages of chemical conversion

208 58, 208210, 208254H, 95232, 95235, C10G 5102

Patent

active

057208727

ABSTRACT:
A process for hydroprocessing liquid petroleum and chemical streams in two or more hydroprocessing stages, which stages are in separate reaction vessels and wherein each reaction stage contains a bed of hydroprocessing catalyst. The liquid product from the first reaction stage is sent to a stripping stage and stripped of H.sub.2 S, NH.sub.3 and other dissolved gases. The stripped product stream is then sent to the next downstream reaction stage, the product from which is also stripped of dissolved gases and sent to the next downstream reaction stage until the last reaction stage, the liquid product of which is stripped of dissolved gases and collected or passed on for further processing. The flow of treat gas is in a direction opposite the direction in which the reaction stages are staged for the flow of liquid. Each stripping stage is a separate stage, but all stages are contained in the same stripper vessel.

REFERENCES:
patent: 4180453 (1979-12-01), Franck
patent: 4251347 (1981-02-01), Rausch
patent: 4619757 (1986-10-01), Zimmerman
patent: 5183556 (1993-02-01), Reilly
patent: 5294327 (1994-03-01), Everett
patent: 5582711 (1996-12-01), Ellis

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