Fluid catalytic cracking regeneration with reduction of nitrogen oxide

Patent · Tue Apr 23 00:00:00 EDT 1991

OSTI ID:5089493

Kovacs, R C; Krambeck, F J; Sarli, M S

This patent describes improvement in a fluid catalytic cracking unit having a cracking zone including a reactor vessel and a regeneration zone including a catalyst regenerator. The improvement comprises: a regeneration vessel comprising a vessel having a side inlet connected to the reactor for admitting spent cracking catalyst from the reactor to a single dense, fluidized bed of catalyst in which regeneration of the catalyst takes place, an outlet for regenerated catalyst at the bottom of the regeneration vessel for withdrawing regenerated catalyst from the dense, fluidized bed of catalyst, a gas inlet for injecting oxygen-containing regeneration gas into the dense, fluidized bed of catalyst maintained in the lower portion of the regeneration vessel to regenerate the catalyst, cyclone separators inside the regeneration vessel for separating entrained catalyst from regeneration effluent gases and returning the separated catalyst to the dense bed in the regenerator, the cyclone separators having inlets above the spent catalyst inlet. A cyclone separator inlet manifold having a central hub with a least one inlet at the common collection region, and outwardly extending conduits extending from the central hub to the inlets of the cyclone separators connecting the hub to the cyclone inlets.

• Assignee: Mobil Oil Corp., Fairfax, VA (USA)
• Patent Number(s): US 5009853; A
• Application Number: PPN: US 7-512637
• OSTI ID: 5089493
• Resource Relation: Patent File Date: 18 Apr 1990
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
54 ENVIRONMENTAL SCIENCES
20 FOSSIL-FUELED POWER PLANTS
CATALYSTS
RECYCLING
HYDROCARBONS
CATALYTIC CRACKING
NITROGEN OXIDES
AIR POLLUTION CONTROL
CHEMICAL REACTORS
CYCLONE SEPARATORS
CHALCOGENIDES
CHEMICAL REACTIONS
CONCENTRATORS
CONTROL
CRACKING
DECOMPOSITION
EQUIPMENT
INERTIAL SEPARATORS
NITROGEN COMPOUNDS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
PYROLYSIS
SEPARATION EQUIPMENT
THERMOCHEMICAL PROCESSES
020400* - Petroleum- Processing
020500 - Petroleum- Products & By-Products
540120 - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)
200202 - Fossil-Fueled Power Plants- Waste Management- Noxious Gas & Particulate Emissions