Staged upflow and downflow hydroprocessing with noncatalytic rem

Details Staged upflow and downflow hydroprocessing with noncatalytic rem Staged upflow and downflow hydroprocessing with noncatalytic rem

1998-10-23

1999-11-16

Griffin, Walter D.

Mineral oils: processes and products

Refining

Sulfur removal

208210, 208211, 208213, 208254H, 203DIG6, C10G 2500, C10G 1700

Patent

active

059851350

ABSTRACT:
A hydroprocessing process for removing impurities from a feed comprising a hydrocarbonaceous liquid comprises at least one cocurrent, upflow hydroprocessing reaction stage, a vapor-liquid contacting stage and a downflow hydroprocessing reaction stage. The feed and hydrogen react in the upflow stage to produce a partially hydroprocessed liquid and vapor effluent. The vapor contacts a hydrocarbonaceous liquid in the contacting stage, which transfers impurities from the vapor into the liquid. The impurity-enriched contacting liquid mixes with the upflow stage liquid effluent and the combined liquid effluents react with hydrogen in the downflow reaction stage, to form a hydroprocessed product liquid and vapor effluent. Additional product liquid is recovered by cooling and condensing either or both the contacting and downflow stage vapor effluents.

REFERENCES:
patent: 3234121 (1966-02-01), MacLaren
patent: 5522983 (1996-06-01), Cash et al.
patent: 5705052 (1998-01-01), Gupta
patent: 5720872 (1998-02-01), Gupta

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