Fluidized catalytic cracking

Details Fluidized catalytic cracking Fluidized catalytic cracking

1981-12-29

1983-11-08

Gantz, Delbert E.

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Solids contacting and mixing

202164, 422144, 422145, C10G 1118

Patent

active

044141009

ABSTRACT:
The present invention relates generally to fluidized catalytic cracking. More particularly, the present invention relates to a baffle arrangement that improves separation of gaseous hydrocarbon reaction products from catalyst within the reactor vessel of a fluidized catalytic cracker unit. The catalytic reactor vessel includes an outer generally cylindrical shell having a stripping zone arranged at the lower end of the vessel. An inlet riser conduit forming a primary reaction zone extends generally external to and generally parallel with the shell to a location near the top of the vessel. The upper end of the riser conduit then turns through 180.degree., preferably through two right angle turns of 90.degree. each, so that the riser conduit enters the vessel either on a horizontal run into the side of the vessel and then turns downwardly, or on a downward run through the top of vessel, into the center of the vessel to form an outlet, discharging downwardly the mixture of hydrocarbon and catalyst. The mixture is directed against a catalyst disengaging baffle whose surface is at an obtuse angle to the axis of the riser discharge conduit. The resulting angle of deflection of the flowing mixture is from 10.degree. to 30.degree., preferably 20.degree.. According to a preferred form of the present invention, a conical catalyst disengaging baffle is arranged with its apex directed toward and the axis concentric with and below the discharge outlet. The conical baffle is also above the stripping zone, so that the mixture is deflected outwardly from the outlet toward the wall of the vessel.

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patent: 4118337 (1978-10-01), Gross et al.
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patent: 4310411 (1982-01-01), Wilkening

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