Closed cyclone fcc catalyst separation with stripping gas injection and direct steam injection

Patent · Tue Nov 18 04:00:00 EST 1986

OSTI ID:6968491

Haddad, J H; Owen, H

This patent describes a method for the fluid catalytic cracking of a hydrocarbon feed in a closed cyclone system, comprising the steps of: passing a suspension of the hydrocarbon feed and a catalyst through a riser conversion zone and cracking the hydrocarbon feed in the riser conversion zone thereby producing a mixture comprising the catalyst, unconverted feed and products of conversion, wherein a downstream end of the riser is enclosed by a reactor vessel; passing the mixture from the riser conversion zone to a riser cyclone separator through a first conduit; separating a portion of the catalyst from the mixture in the riser cyclone separator by passing the mixture in the riser cyclone in downward spiral flow along an inside wall of a cylindrical chamber of the riser cyclone, the separated portion of catalyst passing from the cylindrical chamber into an upstream end of a frusto-conical chamber, the upstream end being attached to the cylindrical changer; and passing the separated portion of catalyst to a downstream end of the frusto-conical chamber, the downstream end of the chamber having a narrower inside diameter than the upstream end.

• Assignee: Mobil Oil Corp., New York, NY
• Patent Number(s): US 4623446
• OSTI ID: 6968491
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
CATALYSTS
CATALYTIC CRACKING
CHEMICAL REACTIONS
CHEMICAL REACTORS
CONCENTRATORS
CRACKING
CYCLONE SEPARATORS
DECOMPOSITION
DISPERSIONS
EQUIPMENT
FLUID FLOW
FLUID INJECTION
GAS FLOW
GAS INJECTION
HYDROCARBONS
INERTIAL SEPARATORS
MIXTURES
ORGANIC COMPOUNDS
POLLUTION CONTROL EQUIPMENT
PYROLYSIS
REGENERATION
SEPARATION EQUIPMENT
STEAM INJECTION
THERMOCHEMICAL PROCESSES