摘要:
A process and apparatus for mixing streams of regenerated and carbonized catalyst involves passing a catalyst stream into and out of a chamber in a lower section of a riser. The chamber fosters mixing of the catalyst streams to reduce their temperature differential before contacting hydrocarbon feed.
摘要:
The process herein provide a catalyst cooler with a vent that communicates fluidizing gas to a lower chamber of a regenerator. Air that is used as fluidizing gas can then be consumed in the regenerator without promoting after burn in the upper chamber.
摘要:
A process for stripping gases from catalyst material in which catalyst travels down baffles at a first acute angle and then at a second acute angle on the same baffle. Traveling down the baffle at the second angle assures the catalyst will cross a downcomer channel and land on an adjacent baffle.
摘要:
One exemplary embodiment can be a fluid catalytic cracking system. The fluid catalytic cracking system can include a reaction zone including a riser having a top and a bottom adapted to receive spent catalyst at a first elevation and regenerated catalyst at a second elevation. Typically, the first elevation is lower than the second elevation. Additionally, the fluid catalytic cracking system can include a gas distributor contained near the bottom of the riser in communication with a hydrocarbon feed.
摘要:
A process for distributing a deflecting media into an axial center of a riser to push catalyst outwardly toward the feed injectors ensures better contacting between hydrocarbon feed and catalyst.
摘要:
Disclosed is a catalyst distributor and process for spreading catalyst over a regenerator vessel. Nozzles disposed angular to a header of the distributor spread catalyst throughout a full cross section of the catalyst bed.
摘要:
An apparatus for stripping gases from catalyst material comprises baffles having a second face that extends toward a downcomer channel between baffles to spread catalyst out on adjacent baffles for better contact with stripping gas.
摘要:
The present invention comprises a process for conversion of oxygenates to olefins comprising contacting within a reactor the oxygenates with a catalyst to produce light olefins and wherein the reactor comprises at least two zones, a first zone wherein gas circulates at a faster rate than a second zone wherein a gas circulates at a slower rate; and inserting a quantity of inert gas into the second zone to increase circulation of any materials located in said second zone. The invention prevents accumulation of undesirable by-products within stagnant zones within the reactor and reduces the amount of coke deposited on catalyst or on surfaces within these zones.
摘要:
Disclosed is an apparatus for injecting a plurality of uniform jets into an extended dispersion of moving catalyst particles within a reactor vessel. The apparatus comprises a plurality of outer conduits each for carrying atomizing fluid. A plurality of tips in the outer conduits each include a plurality of orifices for spraying a mixture of feed and atomizing fluid. Inner conduits with outlets within the outer conduits delivers feed to the tips of the outer conduits.
摘要:
An apparatus and process in which a catalyst nozzle and a feed nozzle are joined together at a joint in a reactor vessel that contains a disengaging transport conduit in communication with a separator. An inlet to the transport conduit is disposed vertically higher than the joint to reduce the quantity of catalyst that enters the transport conduit with the vapor product.