Method for producing catalysts for synthesizing maleic anhydride by means of gas phase oxidation

US6407030B1 · kind B1 · utility

Assignee

• Consortium für elektrochemische Industrie GmbH · DE

Inventors

• Dirk Groke · Taufkirchen, DE
• Richard Bosch · Chesterfield, US
• Joachim Lotz · Hersbruck, DE
• Hans-Jurgen Eberle · Munich, DE

Key dates

• Filing date: Jun 1, 2001
• Grant date: Jun 18, 2002
• Expiry date: Jun 1, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C51/252
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A method is provided for producing catalysts useful for synthesizing maleic anhydride by oxidizing saturated and/or unsaturated C4 hydrocarbons. A vanadium (V) compound is reacted with a mixture of phosphorous and phosphoric acids in a particular ratio, in a solvent mixture containing a structure former, and an entrainer and where the water of reaction together with entrainer is distilled off and the resulting precursor is subjected to calcination.