Method for hydrogenating benzene polycarboxylic acids or derivatives thereof by using a catalyst containing macropores

US6284917A · kind A · utility

Assignee

• BASF SE

Inventors

• Melanie Brunner · Schifferstadt, DE
• Arnd Bottcher · Bischofswerda, DE
• Boris Breitscheidel · Fulda, DE
• Klaus Halbritter · Heidelberg, DE
• Jochem Henkelmann · Mannheim, DE
• Lucien Thil · Schifferstadt, DE
• Rolf Pinkos · Bad Dürkheim, DE

Key dates

• Filing date: Jun 19, 2000
• Grant date: Sep 4, 2001
• Expiry date: Jun 19, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C2601/14
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for hydrogenating a benzenepolycarboxylic acid or a derivative thereof or a mixture of two or more thereof by bringing the benzenepolycarboxylic acid or the derivative thereof or the mixture of two or more thereof into contact with a hydrogen-containing gas is carried out in the presence of a catalyst which comprises as active metal at least one metal of transition group VIII of the Periodic Table alone or together with at least one metal of transition group I or VII of the periodic table applied to a support which contains macropores with the proviso that if dimethyl terephthalate is hydrogenated, the hydrogenation using a catalyst which comprises as active metal ruthenium either alone or together with at least one metal of transition group I, VII or VIII of the Periodic Table applied to a support, where the support has a mean pore diameter of at least 50 nm and a BET surface area of at most 30 m.sup.2 /g and the amount of the active metal is from 0.01 to 30% by weight, based on the total weight of the catalyst, and the ratio of the surface areas of the active metal and the catalyst support is less than 0.05, and/or a catalyst which comprises as active metal ruthenium ei…