Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1976-10-15
1978-05-30
Douglas, Winston A.
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
252437, 26034675, B01J 2714, C07D30760
Patent
active
040922693
ABSTRACT:
The prior art discloses that phosphorus-vanadium-oxygen catalysts wherein the phosphorus to vanadium atom ratio is between about 1:2 and about 2:1, and wherein at least about 20 atom percent of the vanadium is in the tetravalent state, are useful for the conversion of aliphatic hydrocarbons to maleic anhydride. It has now been found that when the pore volume of the catalysts from pores having diameters between about 0.8 micron and about 10 microns is greater than 0.02 cc/g, the catalyst is particularly useful for the conversion of saturated hydrocarbons, such as butane, to maleic anhydride.
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patent: 3915892 (1975-10-01), Harrison
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Mount Ramon A.
Pysz, Jr. John F.
Raffelson Harold
Douglas Winston A.
Logomasini J. C.
Monsanto Company
Passley P. L.
Tarter S. M.
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