Method of producing cyclopentene

Details Method of producing cyclopentene Method of producing cyclopentene

1975-04-14

1976-11-30

O'Keefe, Veronica

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260666DQ, 260666P, C07C 300

Patent

active

039949869

ABSTRACT:
A method of producing cyclopentene comprising the steps of depolymerizing dicyclopentadiene to produce raw cyclopentadiene; feeding the raw cyclopentadiene to a distillation tower having an upper part cooled to a temperature near the boiling point of the cyclopentadiene and an outlet maintained at 35.degree. to 60.degree. C and a lower part at a temperature of 40.degree. to 150.degree. C; thereby to produce highly pure gaseous cyclopentadiene at the top outlet and impure components having high boiling point at the lower outlet which are removed continuously; mixing the highly pure cyclopentadiene obtained thereby with hydrogen and reacting in a first hydrogenation reactor using a palladium containing catalyst, then mixing the resulting product with hydrogen and reacting in a second hydrogenation reactor with a palladium containing catalyst; cooling the resulting product and separating the liquid phase from the gas phase and recirculating the gas phase for use in the hydrogenation reactions.

REFERENCES:
patent: 2349047 (1944-05-01), Lycan et al.
patent: 2453044 (1948-11-01), Staff
patent: 3565963 (1971-02-01), Tabler et al.
patent: 3598877 (1971-08-01), Fountain et al.
patent: 3715404 (1973-02-01), Lindlar et al.
patent: 3751497 (1973-08-01), Schwerdtel et al.
patent: 3751499 (1973-08-01), Tazuma et al.
patent: 3763254 (1973-10-01), Engelhard et al.
patent: 3793381 (1974-02-01), Kohler et al.

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