fcc gasoline selective hydrodesulfurization process up to less than 10 ppm sulfur

摘要

Selective hydrodesulfurization of gasoline fcc to less than 10 ppm sulfur A process for reducing the sulfur content of a hydrocarbon stream is disclosed. a full range of cracked naphtha is contacted with a hydrogenation catalyst to convert at least a portion of the thioether dienes and mercaptans and to hydrogenate at least a portion of the dienes. The full range cracked naphtha is fractionated into a light naphtha fraction, a medium naphtha fraction, and a heavy naphtha fraction. the heavy fraction of naphtha is hydrogen disulfurized. the average naphtha fraction is mixed with oil and hydrogen gas to form a mixture which is contacted with a hydrodesulfurization catalyst to produce an average naphtha fraction having a reduced sulfur concentration. light, heavy, and medium naphtha fractions can then be recombined to form a hydrodesulfurized product having a sulfur content of less than 10 ppm in some embodiments.