Process and apparatus for contacting feed and catalyst with improved catalyst mixing
AssigneeUop LLC
InventorsRichard A. Johnson, II, Wolfgang A. Spieker, Mohammad-Reza Mostofi-Ashtiani
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Abstract
A process and reactor for contacting a feed stream with a catalyst stream comprises a reaction chamber comprising two spent catalyst inlets for delivering two spent catalyst streams to the reaction chamber and at least one regenerated catalyst inlet for delivering a regenerated catalyst stream to the reaction chamber. The reaction chamber may also include a second regenerated catalyst inlet for delivering a second regenerated catalyst stream to the reaction chamber. The second spent catalyst inlet enables thorough mixing of catalyst streams.
Claims10
A process for contacting a feed stream with fluidized catalyst comprising:
- charging said feed stream to a reactor;
- feeding a first spent catalyst stream to said reactor and feeding a second spent catalyst stream to said reactor;
- feeding a first regenerated catalyst stream to said reactor;
- contacting said feed stream with the first spent catalyst stream, the second spent catalyst stream and the first regenerated catalyst stream to produce a product gas stream and spent catalyst;
- and
- separating said product gas stream from said spent catalyst,
- wherein a spent angle between a first longitudinal axis of a first spent catalyst inlet and a second longitudinal axis of a second spent catalyst inlet is between about 105 and about 135 degrees.
A process for contacting a feed stream with fluidized catalyst comprising:
- charging said feed stream to a reactor;
- feeding a first spent catalyst stream to said reactor through a spent catalyst pipe having a first spent catalyst pipe diameter;
- feeding a first regenerated catalyst stream to said reactor;
- feeding a second spent catalyst stream or a second regenerated catalyst stream to said reactor:
- mixing the first spent catalyst stream, the first regenerated catalyst stream, and the second spent catalyst stream or the second regenerated catalyst stream such that at one of said spent catalyst pipe diameter above all catalyst inlets the temperature differential among catalyst in a cross section is no more than 20° C.;
- contacting said feed stream with a mixture of the first spent catalyst stream the first regenerated catalyst stream, and the second spent catalyst stream or the second regenerated catalyst stream to produce a product gas stream and spent catalyst;
- and
- separating said product gas stream from said spent catalyst.
A process for contacting a feed stream with fluidized catalyst comprising:
- charging said feed stream to a reactor;
- feeding a first spent catalyst stream to said reactor;
- feeding a first regenerated catalyst stream to said reactor;
- feeding a second spent catalyst stream or a second regenerated catalyst stream to said reactor;
- contacting said feed stream with the first spent catalyst stream, the second spent catalyst stream, the first regenerated catalyst stream and the second regenerated catalyst stream to produce a product gas stream and spent catalyst;
- and
- separating said product gas stream from said spent catalyst,
- wherein a spent angle between a first longitudinal axis of a first spent catalyst inlet and a second longitudinal axis of a second spent catalyst inlet is greater than a regenerated angle between a first regenerated longitudinal axis of a first regenerated catalyst inlet and a second regenerated longitudinal axis of a second regenerated catalyst inlet.
Dependencies are inferred from the claim text.