Recovery of isoprene

Details Recovery of isoprene Recovery of isoprene

1974-04-03

1976-03-30

Coughlan, Jr., Paul M.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

203 70, C07C 706

Patent

active

039475069

ABSTRACT:
There is disclosed a method of recovery of isoprene from a hydrocarbon stream consisting of predominately C-5 hydrocarbons and containing isoprene, n-pentane and other 5 carbon atom hydrocarbons which comprises subjecting said hydrocarbon stream to two successive high efficiency distillations, the first distillation being conducted in a manner as to remove as an overhead fraction, hydrocarbon components of said stream which are more volatile than the azeotrope of isoprene
-pentane and as a bottom fraction the other hydrocarbons in said stream, subjecting the bottom fraction from the first distillation to the second distillation, the second distillation being conducted in a manner as to remove the azeotrope of isoprene
-pentane as an overhead fraction and as a bottom fraction the other hydrocarbons which are less volatile than the azeotrope of isoprene
-pentane, and recovering the isoprene
-pentane azeotrope.

REFERENCES:
patent: 2614969 (1952-10-01), Morrell et al.
patent: 3230157 (1966-01-01), Hill et al.
patent: 3274286 (1966-09-01), Reich
patent: 3439060 (1969-04-01), Kempton
patent: 3557239 (1971-01-01), Gebhart et al.
patent: 3692861 (1972-09-01), Chikatsu et al.

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