Patent ID: 6905592
Filing Date: 2005-06-14
Classification: C10G

Abstract:
1. A process for the desulphurization of feed streams comprising: supplying a hot process stream to a lead catalyst bed, said lead catalyst bed comprising a first sulphur-removing catalyst and a second sulphur-removing catalyst, said lead catalyst bed being operated under conditions such that sulphur is removed from said hot process stream by said 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 said 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, said lag catalyst bed comprising said first sulphur-removing catalyst and said second sulphur-removing catalyst and said lag catalyst bed being operated under conditions such that sulphur is removed from said process stream by said second sulphur-removing catalyst and said first sulphur-removing catalyst removes sulphur less efficiently from the stream at the operating temperature of said lag catalyst bed; and recovering said sulphur-depleted stream from said second catalyst bed.