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The multi-stage up-flow hydrogen treatment which accompanies the non-contact impurity removal from the 1st step steam effluence
The multi-stage up-flow hydrogen treatment which accompanies the non-contact impurity removal from the 1st step steam effluence
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机译:多级上流氢气处理,伴随着第一步蒸汽流出物中非接触式杂质的去除
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摘要
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.
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