Patent ID: 6072095
Filing Date: 2000-06-06
Classification: C07C

Abstract:
A process for producing a tertiary olefin by decomposing a tertiary alkyl ether, comprising:a) decomposing at least one tertiary alkyl ether in a reaction zone comprising at least one reactor (R1) containing a catalyst for decomposing said ether, under conditions which can at least partially decompose said tertiary alkyl ether to a product (P) containing at least one alcohol and at least one tertiary olefin and optionally ether which has not been decomposed in step a) and optionally light compounds;b) purifying at least a portion of product (P) in a water washing extraction zone (L1) to obtain an aqueous fraction (A1) containing most of the alcohol present in and a fraction (B1) containing most of the tertiary olefin initially present in said portion, said fraction (B1) containing said tertiary olefin, water, optionally ether and optionally light compounds and being substantially free of alcohol;said process further comprising step c) comprising passing at least a portion of fraction (B1) from step b) to a separation zone (Co1), to recover a liquid aqueous fraction (La1) and a liquid organic fraction (Lb1) containing most of the tertiary olefin initially present in said portion of the fraction (B1), said fraction (Lb1) containing said tertiary olefin, optionally ether and optionally light compounds, said fraction (Lb1) being depleted of water.