Patent ID: 9422205
Filing Date: 2016-08-23
CPC Classification: C07C,Y02P

Claim Text:
1. A process for the production of high-purity isobutene which comprises feeding a stream containing MTBE (Methyl-Tert Butyl Ether) or ETBE (Ethyl-Tert Butyl Ether) into a fractionation area and obtaining a stream of high-purity MTBE or ETBE; and the following areas in sequence: a fractionation area for obtaining the stream of high-purity MTBE or ETBE; a cracking area of said stream of MTBE or ETBE for obtaining an outgoing stream containing isobutene and the relative alcohol, methanol or ethanol; a washing area with water of the stream leaving the cracking area for the recovery of the relative alcohol, in order to obtain a stream containing isobutene, the ether, and light compounds and a stream containing water and relative alcohol, with a relevant fractionation section for separating the washing water to be recycled to the same washing area from the relative alcohol; a fractionation area of the stream containing isobutene, the ether, and light compounds for separating a stream of high-purity isobutene.