Abstract:
Maleic anhydride is made from n-butane or n-butene in a tubular reactor having an undivided reaction zone which contains two different catalysts-the first catalyst converts at least part of the n-butane or n-butene to butadiene and the second catalyst converts at least part of this product to maleic anhydride.
Abstract:
Molybdenum containing oxidation catalysts are prepared by reducing hexavalent molybdenum to a valence state below +6 prior to or during the catalyst preparation. Reproducible catalysts with superior catalytic activity are conveniently made by this process.
Abstract:
The process in this invention relates to the conversion of organic compounds selected from the group consisting of the nbutylenes, butadiene, crotonaldehyde and furan in a selective manner to maleic anhydride in the presence of a catalyst comprising the mixed oxides of antimony and molybdenum.
Abstract:
Catalysts containing antimony and molybdenum are promoted by the addition of iron or vanadium or mixture thereof to give very desirable catalysts for the preparation of maleic anhydride from 1,3-butadiene, n-butylenes, crotonaldehyde and furan.
Abstract:
THE USE OF COATED CATALYSTS IN TEE PREPARATION OF MALEIC ANHYDRIDE Very desirable temperature control and selectivity are obtained in the oxidation of benzene to maleic anhydride using an oxidation catalyst of an essentially inert support of at least 20 microns containing on its outer surface a coating of a catalytically active oxide material or a catalytically active oxide material and an oxide support.
Abstract:
Coated catalysts having an inert support material with an outer surface and a coating of active catalyst containing tungsten, vanadium and molybdenum plus optionally one or more of Fe, Mn, Cu, Sn, Sb, Cr, Ce, U, Co, Ni, Zn, Mg or mixture thereof have been found to be especially effective catalysts for the production of unsaturated acids from the corresponding unsaturated aldehydes, for example, acrolein is oxidized to acrylic acid using these catalysts. The catalysts give a very low exotherm, very high single pass yields of the desired acid and reduce the undesirable by-products.
Abstract:
Catalysts containing the oxides of vanadium, phosphorus and uranium have been found to be especially effective in the oxidation of n-butane, n-butenes and butadiene with molecular oxygen in the vapor phase to yield maleic anhydride. The reaction with n-butane gives an especially pure product in high yield.
Abstract:
MANUFACTURE OF HYDROPEROXIDES Hydroperoxides, such as cyclohexylbenzene hydroperoxide, are manufactured by the oxidation of aryl compounds, such as cyclohexylbenzene, in the presence of a catalyst selected from the group consisting of C6 - C18 primary amines and polyvinylpyrrolidone.