CATALYSEUR A BASE D'OXYDES DE VANADIUM ET DE TITANE POUR LA FABRICATION D'ANHYDRIDE PHTALIQUE

• Main Author: YOSHIYUKI NAKANISHI, YOJI AKAZAWA, NORIAKI IKEDA ET TAKEHIKO SUZUKI
• Format: Patent
• Language: French
• Published: 19.06.1981
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; HETEROCYCLIC COMPOUNDS; METALLURGY; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

CATALYSEUR POUR LA PRODUCTION D'ANHYDRIDE PHTALIQUE PAR OXYDATION DE L'ORTHO-XYLENE OU DU NAPHTALENE AVEC DE L'OXYGENE MOLECULAIRE.CE CATALYSEUR COMPREND UNE MATIERE CATALYTIQUE FORMEE DE 1 A 20PARTIES EN POIDS D'OXYDE DE VANADIUM VO AVEC 99 OU 80PARTIES EN POIDS D'OXYDE DE TITANE TIO DE LA FORME ANATASE, POREUX ET EN PARTICULES DE DIAMETRE COMPRIS ENTRE 0,4 ET 0,7MICRON, AYANT UNE SURFACE SPECIFIQUE DE 10 A 60MG, ET, POUR 100PARTIES EN POIDS DE LA SOMME DE CES DEUX COMPOSANTS, 0,01 A 1PARTIE EN POIDS DE NBO, 0,05 A 1,2PARTIE EN POIDS D'OXYDE DE POTASSIUM, CESIUM, RUBIDIUM OU THALLIUM, 0,2 A 1,2PARTIE DE PO ET 0,5 A 10PARTIES DE SBO, LA MATIERE CATALYTIQUEMENT ACTIVE SE TROUVANT SUR UN SUPPORT POREUX A RAISON DE 3 A 200G POUR 100CM DU SUPPORT. A catalyst for the production of phthalic anhydride by the catalytic vapor-phase oxidation of o-xylene or naphthalene with molecular oxygen, said catalyst comprising a catalytically active material composed of 1 to 20 parts by weight of V2O5 of vanadium oxide and 99 to 80 parts by weight as TiO2 of anatase-type titanium oxide being porous and having a particle diameter substantially of 0.4 to 0.7 micron and a specific surface area of 10 to 60 m2/g, and per 100 parts by weight of the sum of these two components, 0.01 to 1 part by weight as Nb2O5 of niobium, 0.05 to 1.2 parts by weight as oxide of potassium, cesium, rubidium or thallium, 0.2 to 1.2 parts by weight as P2O5 of phosphorus and 0.5 to 10 parts by weight as Sb2O3 of antimony, said catalytically active material being supported on a porous carrier in an amount of 3 to 200 g/100 cc of carrier.