Process for the preparation of pure alkyl tert-alkyl ethers and hydrocarbon raffinates which are largely free from isoolefins and from alkanols

US4504688A · kind A · utility

Assignees

• EC Erdolchemie GmbH · DE
• BAYER HEALTHCARE LLC · DE

Inventors

• Jens Herwig · Cologne, DE
• Hans-Volker Scheef · Dormagen, DE
• Bernhard Schleppinghoff · Dormagen, DE
• Peter M. Lange · Leverkusen, DE

Key dates

• Filing date: Mar 7, 1984
• Grant date: Mar 12, 1985
• Expiry date: Mar 7, 2004

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C41/06
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for the preparation of pure alkyl tertiary alkyl ethers and hydrocarbon raffinates which are substantially free from tertiary olefins and alkanols. An alkanol and a hydrocarbon mixture containing at least one tertiary olefin are contacted with the alkanol being present in a stoichiometric excess. The reaction product is removed from the reaction zone and excess alkanol in the reaction product or a partial stream thereof is absorbed on a synthetic ion exchanger containing groups which exchange cations or anions or mixtures of such ion exchangers. After absorption of at least a portion of the alkanol on the synthetic ion exchanger, the alkanol is desorbed by contacting the same with a hydrocarbon mixture containing at least one tertiary olefin.