Dehydrogenation reactor catalyst collector with hot hydrogen stripping zone
AssigneeUop LLC
InventorsPaul A. Sechrist, Laura E. Leonard
Life of this patent
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Abstract
A process and apparatus is presented for the removal of sulfur from a catalyst. The catalyst is a dehydrogenation catalyst, and sulfur accumulates during the dehydrogenation process. The sulfur is removed before the catalyst is regenerated to prevent the formation of undesirable sulfur oxide compounds created during regeneration. The catalyst, during regeneration, includes redispersion of a metal on the catalyst, and removal of sulfur oxides overcomes the interference with chloride retention and metal redispersion in the regeneration process.
Claims20
A process for the regeneration of spent catalyst comprising:
- passing the spent catalyst to a catalyst transfer pipe, and passing a sulfur stripping gas through the catalyst transfer pipe, thereby creating a sulfur stripping zone to generate a sulfur stripped spent catalyst;
- and
- passing the sulfur stripped spent catalyst to a regenerator to create a regenerated catalyst stream.
A process for the regeneration of spent dehydrogenation catalyst comprising:
- passing the spent dehydrogenation catalyst through a heated stripping section to generate a stripped spent catalyst;
- passing the stripped spent catalyst through a cooling zone to generate a cooled stripped spent catalyst;
- passing the cooled stripped spent catalyst to a catalyst collection zone;
- passing a sulfur-free gas through the cooling zone;
- and
- passing the sulfur-free gas through the stripping section to strip sulfur compounds from the spent catalyst.
An apparatus for the stripping of residual sulfur from a catalyst comprising:
- a dehydrogenation reactor having a catalyst inlet, a catalyst outlet, a hydrocarbon inlet and a product outlet;
- catalyst transfer pipes affixed to a catalytic reactor having a catalyst stripping section, at the catalyst outlet;
- a heating means for heating the catalyst transfer pipes;
- and
- a stripping gas inlet affixed downstream of the catalyst transfer pipes, and in fluid communication with the catalyst transfer pipes.
Dependencies are inferred from the claim text.