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US 10,814,315 B2Granted
Process for managing sulfur on catalyst in a light paraffin dehydrogenation process
AssigneeUop LLC
InventorsWolfgang A. Spieker, Adam D. Ballard, Gregory J. Gajda, J. W. Adriaan Sachtler
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Abstract
A process is presented for the management of sulfur on a catalyst. The catalyst is a dehydrogenation catalyst, and sulfur accumulates during the dehydrogenation process. Sulfur compounds are stripped from the spent catalyst and the catalyst is cooled before the regeneration process. The process includes controlling the amount of sulfur that needs to be removed from the catalyst before regeneration.
Claims17
A process for regenerating a spent catalyst from a reactor comprising:
- (a) passing the spent catalyst, having sulfur on the catalyst, to a sulfur stripping vessel;
- (b) injecting a water stream into a gas stream to generate a hydrogen gas stream consisting essentially of hydrogen and water;
- (c) passing the hydrogen gas stream to the sulfur stripping vessel at an elevated temperature, thereby generating a stripped spent catalyst stream;
- (d) passing the stripped spent catalyst stream to a regenerator wherein the stripped spent catalyst stream is contacted with chlorine-containing gas, thereby generating a regenerated catalyst stream;
- and
- (e) returning the regenerated catalyst to the reactor via a reduction zone.
3 more elements
A process for managing sulfur in a catalytic process comprising:
- (a) passing a spent dehydrogenation catalyst stream to a stripping and cooling vessel;
- (b) injecting a water stream into a sulfur free hydrogen gas stream to generate a hydrogen gas stream consisting essentially of hydrogen and water;
- (c) passing the hydrogen gas stream to the stripping and cooling vessel, stripping the spent dehydrogenation catalyst of sulfur, thereby generating a stripped spent dehydrogenation catalyst that passes to a cooling zone of the stripping and cooling vessel;
- (d) passing a gas to the stripping and cooling vessel to cool the stripped spent dehydrogenation catalyst, thereby generating a cooled catalyst stream;
- (e) passing the cooled catalyst stream to a regenerator wherein the cooled catalyst stream is contacted with chlorine-containing gas, to generate a regenerated catalyst;
- and
- (f) passing the regenerated catalyst to a dehydrogenation reactor section.
4 more elements
Dependencies are inferred from the claim text.