Process for the desulphurization of feed streams

Details Process for the desulphurization of feed streams Process for the desulphurization of feed streams

2005-06-14

2005-06-14

Langel, Wayne A. (Department: 1754)

Mineral oils: processes and products

Refining

Sulfur removal

C423S244010, C423S244060, C423S230000, C423S231000, C208S20800M, C208S209000, C208S244000, C208S245000, C208S247000, C208S248000, C208S249000

Reexamination Certificate

active

06905592

ABSTRACT:
The invention relates to: a process for the desulphurization of feed streams comprising: supplying a hot process stream to a lead catalyst bed (8) comprising a first sulphur-removing catalyst and a second sulphur-removing catalyst under conditions whereby sulphur is removed from the process stream by the first sulphur-removing catalyst and said second sulphur-removing catalyst does not effectively remove sulphur from the stream at the operating temperature of the lead catalyst bed for the duration of the bed's life; collecting a hot partially sulphur-depleted stream from the lead catalyst bed and cooling said stream; passing said cooled stream through a lag catalyst bed (11) comprising the first sulphur-removing catalyst and the second sulphur-removing catalyst under conditions whereby sulphur is removed from the process stream by the second sulphur-removing catalyst and said first sulphur-removing catalyst removes sulphur less efficiently from the stream at the operating temperature of the lag catalyst bed; and recovering said sulphur-depleted stream from the second catalyst bed. In addition it relates to, apparatus for the desulphurization of feed streams which comprises: a lead catalyst bed (8) comprising a first sulphur-removing catalyst and a second sulphur-removing catalyst capable of operating under conditions whereby sulphur is removed from the process stream by the first sulphur-removing catalyst and said second sulphur-removing catalyst does not effectively remove sulphur from the stream at the operating temperature of the lead catalyst bed (8) throughout the lead bed's operating life; means (9) for collecting a hot partially sulphur-depleted stream from the lead catalyst bed (8) and cooling said stream; a lag catalyst bed (11) comprising the first sulphur-removing catalyst and the second sulphur-removing catalyst capable of operating under conditions whereby sulphur is removed from the process stream by the second sulphur-removing catalyst and said first sulphur-removing catalyst does not efficiently remove sulphur from the stream at the operating temperature of the lag catalyst bed(11).

REFERENCES:
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patent: 5507939 (1996-04-01), Russ et al.
patent: 5720901 (1998-02-01), De Jong et al.
patent: 5891323 (1999-04-01), Willis
patent: 6103206 (2000-08-01), O'Connor et al.
patent: 6149886 (2000-11-01), Schoubye
patent: 0320979 (1988-12-01), None
patent: 0527000 (1992-07-01), None

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