Process for recovery of cyclopentadienes

Details Process for recovery of cyclopentadienes Process for recovery of cyclopentadienes

1983-10-26

1985-06-11

Smith, William F.

Distillation: processes, separatory

With chemical reaction

203 78, 203 80, 203 84, 585354, 585803, 585832, B01D 314

Patent

active

045226881

ABSTRACT:
The process gives highly pure cyclopentadiene and methylcyclopentadiene from a cracked gasoline fraction. The merit of the process is that cyclopentadiene and methylcyclopentadiene are recovered by adding a simple distillation system to a conventional cracked gasoline treating plant without altering the plant and operating conditions thereof. An internal reflux stream is withdrawn from the stripping section of a BTX column of a conventional cracked gasoline treating plant, and is sent to a depolymerization-distillation column operated at a bottom temperature of 160.degree.-230.degree. C. The overhead stream of the column is sent to a cyclopentadiene column operated at a bottom temperature of 160.degree.-230.degree. C. Cyclopentadiene is recovered from the overhead of the column, and the bottom stream is sent to methylcyclopentadiene column operated at a bottom temperature of 170.degree.-210.degree. C. Methylcyclopentadiene is recovered from the overhead of the column.

REFERENCES:
patent: 2439307 (1948-04-01), Legatski
patent: 2636056 (1953-04-01), Jones
patent: 2733279 (1956-01-01), Wilson et al.
patent: 2733280 (1956-01-01), Hamner
patent: 2813134 (1953-11-01), Johnson

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