Recovery of isoprene

Details Recovery of isoprene Recovery of isoprene

B - Operations, Transporting

01

D

202/65

B01D 3/36 (2006.01) C07C 7/00 (2006.01) C07C 7/04 (2006.01)

Patent

CA 1050468

INVENTOR: Hugh M Lybarger INVENTION: RECOVERY OF ISOPRENE Abstract of the Disclosure There is disclosed a method of recovery of isoprene from a hydrocarbon stream consisting of predomin- ately 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/n-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/n-pentane as an overhead fraction and as a bottom fraction the other hydrocarbons which are less volatile than the azeotrope of isoprene/n-pentane, and recovering the isoprene/n-pentane azeotrope.

206910

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