Method of producing epoxy resins by gas phase epoxidation

US6392065B1 · kind B1 · utility

Assignee

• Creavis Gesellschaft fuer Technologie und Innovation mbH · DE

Inventors

• Dieter Hönicke · Karlsruhe, DE
• Viorel Duma · Hercules, US
• Waldemar Krysmann · Plaisir, FR

Key dates

• Filing date: Jul 26, 2000
• Grant date: May 21, 2002
• Expiry date: Jul 26, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D301/14
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a method of producing epoxy resins from hydrocarbons with olefinic double bonds, especially alkenes, by heterogeneous catalyzed oxidation in the gaseous phase. According to said method, and oxidic solid catalyst is released which contains iron as its active component at a concentration of 0.001-1% and alkali and/or alkaline earth elements as the promoters. N2O is used as the oxidizing agent. The granulated oxidic solid catalyst, especially on the basis of SiO2 as the carrier, has a specific surface of greater that 50 m2/g. The ratio of the concentrations of the active components to the promoter components is preferably between 1:100 and 10:1. The partial oxidation of hydrocarbons with olefinic double bonds, especially propene, results in propene selectivities of 10-70% at reaction temperatures of 300-500° C. and conversions of 2-30%. The catalyst repeatedly used in the reaction process can easily be regenerated by oxidation in air so that it retains its high activity even after 50 or more regeneration cycles.