Katalysator und Vorkatalysator zur Herstellung von Phthalsäureanhydrid

Details

Veröffentlichungs-Nr.

EP4751806

Anmeldetag

2. Dezember 2024

Veröffentlichung

3. Juni 2026

Rechtsraum

EP

Abstract

A pre-catalyst thermally convertible into a catalyst for producing phthalic anhydride by gas-phase catalytic oxidation of ortho-xylene and/or naphthalene with a molecular oxygen-containing gas comprises a support body, and coated on the support body, a coating composition. The coating composition comprises titanium dioxide; vanadium pentoxide or a vanadium compound thermally convertible to vanadium pentoxide; a binder polymer selected from polyvinyl esters, polyvinyl ester alkylene copolymers and polymers and copolymers of ethylenically unsaturated carboxylic acids such as acrylic acid, methacrylic acid and/or maleic acid, and salts and esters thereof; and a hydrophilic polymer selected from polyalkylene oxides, polyvinyl alcohol and starch. A catalyst obtained by thermal treatment of the pre-catalyst of the invention allows for a high yield and high selectivity in the production of phthalic anhydride.

Anmelder

Firma

BASF SE

Land

🇩🇪 Deutschland