Aromatic carboxylic anhydride catalyst

Patent · Tue Dec 13 04:00:00 EST 1988

OSTI ID:6385571

Wachs, I E; Saleh, R Y; Chersich, C C

This patent describes a process for preparing a catalyst composition comprising vanadium, tantalum and oxygen capable of catalyzing the oxidation of hydrocarbons which comprises: (a) contacting titanium dioxide with a tantalum oxide source in a manner and under conditions sufficient to apply a discontinuous monolayer amount of the tantalum oxide source on the titanium dioxide to form a catalyst precursor; (b) calcining the catalyst precursor in a manner and under conditions sufficient to convert at least a portion of the tantalum oxide source to tantalum oxide, to form a calcined catalyst precursor having a discontinuous monolayer amount of tantalum oxide adsorbed on the titanium dioxide; (c) depositing a catalytically effective amount of at least one vanadium oxide source on the calcined catalyst precursor, to form a vanadium-containing catalyst precursor, and (d) calcining the vanadium-containing catalyst precursor in a manner and under conditions sufficient to convert at least a portion of the vanadium oxide source to vanadium oxide, thereby forming the catalyst composition comprising vanadium, tantalum and oxygen. Improved catalyst which comprises from about 0.001 to 1 weight percent tantalum oxide, from about 0.7 to 50 weight percent vanadium oxide and from about 49 to 99.3 weight percent titanium dioxide anatase, and wherein the vanadium oxide is present in an amount of at least 1.7 N/sub min/ grams.

• Assignee: Exxon Research and Engineering Co., Florham Park, NJ
• Patent Number(s): US 4791092
• OSTI ID: 6385571
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
AROMATICS
CALCINATION
CARBOXYLIC ACIDS
CATALYSIS
CATALYSTS
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL PREPARATION
CHEMICAL REACTIONS
DECOMPOSITION
DEPOSITION
HYDROCARBONS
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PYROLYSIS
QUANTITY RATIO
REFRACTORY METAL COMPOUNDS
SYNTHESIS
TANTALUM COMPOUNDS
TANTALUM OXIDES
THERMOCHEMICAL PROCESSES
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
VANADIUM COMPOUNDS