Regenerator
AssigneeShell Oil Company
InventorRene Samson
Life of this patent
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Abstract
Regenerator vessel provided with means to supply catalyst particles, means to supply an oxygenate gas, means to discharge regenerated catalyst, means to discharge combustion gases from the vessel and means to separate entrained catalyst from the combustion gases, which vessel also comprises, in use, a fluidised bed zone of catalyst at its lower end, wherein in the fluidised bed zone a vertically extending partition, which partition is provided with one or more openings, is present dividing the fluidised bed zone in a dense phase fluidised bed zone and a fast-fluidised bed zone, the dense phase fluidised bed zone provided with the means to supply catalysts and the fast-fluidised bed zone provided with the means to supply an oxygenate gas at its lower end.
Claims8
Regenerator vessel provided with means to supply catalyst particles, means to supply an oxygenate gas, means to discharge regenerated catalyst, means to discharge combustion gases from the vessel and means to separate entrained catalyst from the combustion gases, which vessel also comprises, in use, a fluidised bed zone of catalyst at its lower end, wherein in the fluidised bed zone a vertically extending partition, which partition is provided with one or more openings, is present dividing the fluidised bed zone in a dense phase fluidised bed zone and a fast-fluidised bed zone, the dense phase fluidised bed zone provided with the means to supply catalysts and the fast-fluidised bed zone provided with the means to supply an oxygenate gas at its lower end.
Process for regeneration of spent catalyst in a regenerator vessel, wherein (a) spent catalyst is supplied to a dense fluidised bed present in the regenerator vessel, (b) supplied from the dense fluidised bed to a fast-fluidised bed present in the regenerator vessel, (c) contacted with an oxygenate gas as fluidising medium in the fast dilute fluidised bed at a catalyst density of between 50 and 400 kg/m3, and (d) obtaining regenerated catalyst from the more dilute fluidised bed, wherein part of the regenerated catalyst is discharged from the regenerator vessel and part is recycled to the dense fluidised bed.
Dependencies are inferred from the claim text.