| 摘要 |
A process for the selective hydrodesulfurization of naphtha streams containing olefins and organosulfur compounds is described, said process minimizing olefin hydrogenation and resulting into a product having a reduced sulfur content, this being attained by two-stage hydrodesulfurization and H<SUB>2</SUB>S removal from the first stage effluent, with the first reaction stage catalyst being a more active HDS catalyst than the catalyst of the second reaction stage. A stream of hydrogen and at least one added non-reactive compound is fed to the first stage, with the H<SUB>2 </SUB>mole fraction in the mixture of H<SUB>2 </SUB>and non-reactive compound being from 0.2 to 1.0 and limiting H<SUB>2</SUB>S at the reactor inlet to not more than 0.1% by volume. A hydrogen and at least one added non-reactive compound stream is fed to the second reaction stage, the H<SUB>2 </SUB>mole fraction in the mixture of H<SUB>2 </SUB>and non-reactive compound being from 0.2 to 0.7 and limiting H<SUB>2</SUB>S at the reactor inlet to not more than 0.05% by volume.
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