Title:
CONTROL OF DIRECT-COUPLED FCC RISER CYCLONE
Document Type and Number:
Japanese Patent JP3942653
Kind Code:
B2
Abstract:
PURPOSE: To stably maintain fluidized catalytic cracking by keeping the pressure in a riser cyclone in operation higher than that in a reactor vessel and by keeping the pressure in a direct-coupled cyclone low.
CONSTITUTION: A hydrocarbon feed is brought into contact with a fluidized catalyst in a riser reaction zone 10, and the resultant reaction mixture is sent to a separation zone 22 of a riser cyclone 20. The separation zone pressure is measured. The reaction mixture is separated, and a decomposed hydrocarbon vapor and a coke-attached decomposition catalyst are produced. The decomposed hydrocarbon vapor is recovered and conveyed through a secondary cyclone 60 to a rectification and vapor recovery system. The coke-attached decomposition catalyst is conveyed to a stripping zone 50' and separated with a fresh stripping gas, producing a stripped catalyst and a stripping waste gas. The pressure of the stripping waste gas is measured. The waste gas is conveyed to a separation zone 22' at a flow rate proportionate to the difference between the measured separation pressure and the measured waste gas pressure.
Inventors:
Leons Francis Castagnos, Junior
Application Number:
JP31131794A
Publication Date:
July 11, 2007
Filing Date:
November 22, 1994
Export Citation:
Assignee:
Abi Ibi Ramas Global Incorporated
International Classes:
C10G11/18; G05D9/00; (IPC1-7): C10G11/18
Foreign References:
| EP0488549A1 |
Attorney, Agent or Firm:
Masaki Yamakawa
Hiroro Kurokawa
Masayuki Konno
Osamu Nishiyama
Jiro Suzuki
Shigeki Yamakawa
Hiroro Kurokawa
Masayuki Konno
Osamu Nishiyama
Jiro Suzuki
Shigeki Yamakawa
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