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US 2013/0252805 A1Published application
Process and apparatus for mixing two streams of catalyst
AssigneeUop LLC
InventorsPaolo Palmas, Mohammad-Reza Mostofi-Ashtiani, Lev Davydov
Life of this patent
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Abstract
A process and apparatus for mixing streams of regenerated and carbonized catalyst involves passing a catalyst stream around an insert in a lower section of a riser. The insert fosters mixing of the catalyst streams to reduce their temperature differential before contacting hydrocarbon feed.
Claims20
A process for mixing two streams of catalyst comprising:
- feeding a first stream of catalyst to a riser;
- feeding a second stream of catalyst to said riser;
- passing said first stream of catalyst around an insert in said riser to mix with said second stream of catalyst;
- passing said second stream of catalyst around said insert to mix with said first stream of catalyst;
- and
- passing said first stream of catalyst and said second stream of catalyst around said insert and up said riser.
3 more elements
A process for mixing two streams of catalyst comprising:
- feeding a first stream of catalyst to an enlarged lower section of a riser;
- feeding a second stream of catalyst to said enlarged lower section of said riser;
- passing said first stream of catalyst around an insert in said riser to mix with said second stream of catalyst;
- passing said second stream of catalyst around said insert to mix with said first stream of catalyst;
- passing said first stream of catalyst and said second stream of catalyst around said insert and up said riser;
- and
- further passing said first stream of catalyst and said second stream of catalyst above said insert and into a narrowed section of said riser.
4 more elements
A process for mixing two streams of catalyst comprising:
- feeding a first stream of catalyst to a riser;
- feeding a second stream of catalyst to said riser;
- passing said first stream of catalyst around an insert in said riser to mix with said second stream of catalyst;
- passing said second stream of catalyst around said insert to mix with said first stream of catalyst;
- facilitating swirling of at least one of said first catalyst stream and said second catalyst stream around said insert by use of vanes on said insert;
- and
- passing said first stream of catalyst and said second stream of catalyst around said insert and up said riser.
4 more elements
Dependencies are inferred from the claim text.