Abstract: A generally closed vapor path catalytic cracking reactor system is disclosed which includes a vented post-cyclone inertial separator. The inertial separator includes first and second conduit-like members and a vent located at the downstream end of the upstream member. Spent catalyst can be disengaged from a spent catalyst and cracked vapor mixture through the vent while cracked hydrocarbon vapors flow into the second separator member. The separator vent provides a path for stripping gas to enter the generally closed vapor path under routine operating conditions and provides a flow path for damping pressure surges into a surrounding disengagement vessel under transient quality conditions.

Abstract: The invention is a process and apparatus for rapidly and efficiently separating a fluidized catalytic cracking mixture into cracking catalysts and hydrocarbon vapor. The invention decreases the production of unwanted hydrocarbon byproducts by decreasing the contact time between the separated hydrocarbon vapor and the cracking catalyst.

Abstract: The present invention relates to a process for immediately and intimately mixing a fluidizable cracking catalyst with a fluid hydrocarbon in a riser reactor. The process involves passing the hydrocarbon through a stationary fluid feedstock feed means in fixed relationship with the upstream end of the riser. The feedstock is atomized by a nozzle attached to the downstream end of the feed means. A hollow plug valve positioned concentrically around the feed means is capable of moving in a reciprocating fashion to permit the flow of catalyst to the riser.

Abstract: The present invention relates to a process for immediately and intimately mixing a fluidizable cracking catalyst with a fluid hydrocarbon in a riser reactor. The process involves passing the hydrocarbon through a hollow plug valve engageable with the upstream end of a riser reactor. The hydrocarbon is atomized by a nozzle attached to the downstream end of the hollow plug valve. The plug valve is capable of moving in a reciprocating fashion to permit the flow of catalyst to the riser.

Abstract: The present invention relates to a plug valve which effects the immediate and intimate mixing of fluidizable cracking catalyst with a fluid hydrocarbon in a riser reactor. Further, a stationary guide tube is located around a portion of the plug valve stem so as to define an upper and a lower annular compartment which are separated by a bushing. Bushings also define the upper end of the upper compartment and the lower end of the lower compartment. Each of the annular compartments has a bleed medium conduit connected thereto.

Abstract: A plug valve which effects the immediate and intimate mixing of fluidizable cracking catalyst with a fluid hydrocarbon in a riser reactor. Specifically there is an elongated feed tube extending generally upwardly through the acess opening into the riser, anda plug valve having a generally upright tubular valve stem positioned concentrically and externally around a portion of the feed tube and a hollow plug secured to the valve stem which is engageable with said access opening, where the plug valve is movable in a reciprocating fashion from a closed position for blocking the access opening to an open position for permitting the flow of cracking catalyst through the access opening into the riser reactor.

Abstract: A system is provided in which particulates and sulfur oxides are simultaneously removed from flue gases in a granular bed filter with special sulfur oxide-capturing and particulate-removing material. The spent sulfur oxide-capturing and particulate-removing material can be regenerated in a lift pipe riser.

Abstract: A process is provided in which particulates and sulfur oxides are simultaneously removed from flue gases in a granular bed filter and scrubber with special sulfur oxide-capturing and particulate-removing material. The spent sulfur oxide-capturing and particulate-removing material can be regenerated in a lift pipe riser.