Claims
- 1. A process for the hydrodesulfurization of a cracked naphtha stream comprising the steps of:(a) feeding fresh hydrogen and a naphtha stream containing organic sulfur compounds and olefins to a first reaction zone containing a suitable hydrodesulfurization catalyst at conditions suitable for reacting a portion of the organic sulfur compounds with the hydrogen to produce H2S; (b) feeding the effluent from said first reaction zone to a stripping zone wherein a portion of said H2S is removed to produce a first H2S reduced stream; (c) feeding said first H2S reduced stream and fresh hydrogen to a second reaction zone containing a suitable hydrodesulfurization catalyst at conditions suitable for reacting a portion of the remaining organic sulfur compounds with the hydrogen to produce H2S; and (d) feeding the effluent from said second reaction zone to the stripping zone of step (b) wherein a portion of said H2S is removed to produce a second H2S reduced stream having a further reduced organic sulfur content than said naphtha stream and said first H2S reduced stream.
- 2. The process according to claim 1 wherein the conditions are such that the saturation of any olefins contained in said naphtha is not favored.
- 3. The process according to claim 1 wherein the organic sulfur content of the second H2S reduced stream is below 50 wppm.
- 4. A process for the hydrodesulfurization of a cracked naphtha stream comprising the steps of:(a) feeding fresh hydrogen and a naphtha stream containing organic sulfur compounds and olefins to a first reaction zone containing a suitable hydrodesulfurization catalyst in a form to provide for concurrent reaction and distillation of a reaction mixture of said naphtha stream and the hydrodesulfurization products at conditions suitable for reacting a portion of the organic sulfur compounds with the hydrogen to produce H2S; (b) feeding the effluent from said first reaction zone to a stripping zone wherein a portion of said H2S is removed to produce a first H2S reduced stream; (c) feeding said first H2S reduced stream and fresh hydrogen to a second reaction zone containing a suitable hydrodesulfurization catalyst at conditions suitable for reacting a portions of the remaining organic sulfur compounds with the hydrogen to produce H2S; and (d) feeding the effluent from said second reaction zone to the stripping zone of step (b) wherein a portion of said H2S is removed to produce a second H2S reduced stream having a further reduced organic sulfur content than said naphtha stream and said first H2S reduced stream.
Parent Case Info
This is a continuation, of application Ser. No. 09/502,509, filed Feb. 11, 2000, now U.S. Pat. No. 6,303,020 which claims benefit of Ser. No. 60/175147 filed Jan. 7, 2000.
US Referenced Citations (25)
Provisional Applications (1)
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Number |
Date |
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60/175147 |
Jan 2000 |
US |
Continuations (1)
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Number |
Date |
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Parent |
09/502509 |
Feb 2000 |
US |
Child |
09/886542 |
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US |