Process and apparatus for reacting feed with fluidized catalyst and confined quench
AssigneeUop LLC
InventorsLev Davydov, Richard A. Johnson, II
Life of this patent
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Abstract
A dehydrogenation process and apparatus contact a paraffinic stream with dehydrogenation catalyst to product olefinic product gases. The olefinic product gases are separated from spent dehydrogenation catalyst and contained in a confined space that has a smaller volume than the reactor particularly at the same elevation. The containment of the olefinic product gases facilitates quenching the olefinic product gases to terminate reaction and improve selectivity to propylene.
Claims20
A process for contacting a paraffin stream with dehydrogenation catalyst comprising:
- distributing a paraffin stream to a reactor;
- contacting said reactant stream with a dehydrogenation catalyst stream to produce olefinic product gases and spent dehydrogenation catalyst;
- separating a spent dehydrogenation catalyst stream from an olefinic product gas stream in a primary separator;
- containing said olefinic product gas in a contained space having a volume smaller than the volume of the reactor at the same elevation;
- quenching said olefinic product gases in said contained space;
- and
- discharging said olefinic product gases from said reactor.
A process for contacting a paraffin stream with dehydrogenation catalyst comprising:
- distributing a paraffin stream to a reaction chamber of a reactor;
- contacting said reactant stream with a dehydrogenation catalyst stream to produce olefinic product gases and spent dehydrogenation catalyst;
- separating a spent dehydrogenation catalyst stream from an olefinic product gas stream in a primary separator surrounded by a disengagement can;
- directing said olefinic product gases separated from said spent dehydrogenation catalyst stream through a gas recovery conduit;
- quenching said olefinic product gases in said gas recovery conduit;
- and
- discharging said olefinic product gases from said reactor.
A dehydrogenation reactor for contacting a paraffinic reactant stream with a dehydrogenation catalyst comprising:
- a reaction chamber containing a catalyst inlet for feeding dehydrogenation catalyst to the reactor and a reactant distributor for distributing the paraffinic reactant stream to the dehydrogenation reactor;
- a separation chamber in communication with the reaction chamber, said separation chamber comprising a primary catalyst separator for separating catalyst from product gases and a gas recovery conduit;
- a disengagement can surrounding said primary catalyst separator;
- a gas recovery conduit extending from said disengagement can;
- a quench nozzle in communication with said gas recovery conduit for injecting a quench material into said gas recovery conduit;
- a product outlet for discharging product from the reactor.
Dependencies are inferred from the claim text.