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Two-stage hydrodesulfurization of cracked naphtha streams with light naphtha bypass or removal
Two-stage hydrodesulfurization of cracked naphtha streams with light naphtha bypass or removal
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机译:轻质石脑油旁路或脱除裂化石脑油物流的两步加氢脱硫
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摘要
A process for the selective hydrodesulfurization of olefinic naphtha streams containing a substantial amount of organically-bound sulfur and olefins. The olefinic naphtha stream is selectively desulfurized in a first hydrodesulfurization stage. The effluent stream from this first stage is sent to a separation zone wherein a lower boiling naphtha stream and a higher boiling naphtha stream are produced. The lower boiling naphtha stream is sent through at least two more separation zones, each at a lower temperature than the preceding separation stage. The higher boiling naphtha stream, which contains most of the sulfur moieties, is passed to a second hydrodesulfurization stage wherein at least a fraction of the sulfur moieties are removed.
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