Process for the preparation of alkyl tert.-alkyl ethers

US4330679A · kind A · utility

Assignee

• EC Erdolchemie GmbH · DE

Inventors

• Hans-Dieter Kohler · Dormagen, DE
• Bernhard Schleppinghoff · Dormagen, DE

Key dates

• Filing date: Jun 24, 1981
• Grant date: May 18, 1982
• Expiry date: Jun 24, 2001

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C41/06
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

In a process for the preparation of an alkyl tert.-alkyl ether by reaction of an isoolefin branched at the double bond and an alkanol in the presence of a cation exchanger, the improvement which comprises: PA0 (a) Employing as the cation exchanger a macroporous or gelatinous acid cation exchanger in the H.sup.+ form which has been charged with 0.1 to 5 grams, per one liter of dry cation exchanger, of an elementary form of a metal of sub-groups VI, VII or VIII of the periodic table of elements (Mendeleev) which cation exchanger is crosslinked with the degree of crosslinking of 2 to 65% and has a specific surface area of 5 to 750 square meters per gram on the basis of dry cation exchange resin; and PA0 (b) The reaction is carried out in the liquid phase at a temperature of 30.degree. to 140.degree. C. at a pressure of 2 to 100 bars employing a molar ratio of isoolefin to alkanol of 0.1 to 5.