Patent ID: 8067655
Filing Date: 2011-11-29
Classification: C07C

Abstract:
1. A process for producing diisobutylene comprising: (a) contacting a sulfonic acid resin with a reaction feed comprising 25 to 50 weight percent isobutylene, 3 to 8 weight percent tertiary butyl alcohol, 30 to 60 weight percent diisobutylene, and 10 to 80 weight percent isooctane to produce a product stream comprising diisobutylene, isobutylene, tertiary butyl alcohol, and water; (b) distilling the product stream to produce a first overhead stream comprising water and isobutylene and a first bottoms stream comprising diisobutylene and tertiary butyl alcohol; (c) separating water from the first overhead stream to produce an isobutylene-enriched stream and recycling the isobutylene-enriched stream to step (a); and (d) distilling the first bottoms stream to produce a bottoms product stream comprising diisobutylene and a second overhead stream comprising tertiary butyl alcohol and diisobutylene.