Mineral oils: processes and products – Refining – Sulfur removal
Patent
1998-10-23
1999-11-23
Griffin, Walter D.
Mineral oils: processes and products
Refining
Sulfur removal
208210, 208211, 208213, 208254H, 203DIG6, C10G 2500, C10G 1700
Patent
active
059894113
ABSTRACT:
A hydroprocessing process for removing impurities from a feed comprising a hydrocarbonaceous liquid comprises at least two cocurrent, upflow hydroprocessing reaction stages and a non-catalytic, vapor-liquid contacting stage. The reaction and contacting stages may all be in the same reactor vessel. The feed and a hydrogen treat gas are passed up into a catalyst bed which comprises the first reaction stage, which produces a partially hydroprocessed liquid and vapor effluent. This first stage vapor is passed up into the contacting stage in which it contacts a hydrocarbonaceous liquid which reduces the vapor impurity content. The impurity-enriched contacting liquid passes down and mixes with the first stage liquid effluent. The combined effluents and hydrogen are passed up into the second reaction stage to form a processed product liquid and hydrogen-containing vapor effluent. This second reaction stage vapor effluent is passed up into the first stage to provide at least a portion of the hydrogen for the first stage reaction. Additional product liquid may be recovered by cooling the contacting and condensing the purified contacting stage vapor effluent.
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
Exxon Research and Engineering Company
Griffin Walter D.
Naylor Henry E.
Nguyen Tam M.
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