| 摘要 |
A process and apparatus for fluidized catalytic cracking of heavy oils are disclosed. Quenching and cyclone separation are done in the transfer line to the main distillation column. Quenching hot vapor from the reactor, preferably with liquid recycled from the main column, improves yields, prevents coking in the transfer line and permits higher cracking reactor temperatures. Cyclone separation of quench and/or condensed liquid prevents slugging, or two phase flow, in the transfer line. Some rough-cut fractionation can be achieved in the cyclone separator. Steam stripping of cyclone liquid optimizes operation of the main column.
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