Patent ID: 9656929
Date: 2017-05-23
CPC Classifications: B01D,C07C

Claim:
1. A co-extraction system for separating and purifying butadiene and isoprene from a C 4 hydrocarbon mixture comprising butadiene and a C 5 hydrocarbon mixture comprising isoprene, comprising: (a) a C (b) an extraction zone, comprising: (i) a mainwasher column to receive the light ends of the C (ii) a rectifier column to receive the crude butadiene product, the crude isoprene product, the extractive solvent, and the C (c) a distillation zone, comprising a butadiene finishing column to receive the crude butadiene product, wherein 1,3-butadiene is purified from the crude butadiene product; (d) a degassing zone, comprising a degasser column to receive the crude isoprene product, the extractive solvent, and the C (e) an isoprene finishing column to receive the crude isoprene product and the C