Showing papers on "Mixed oxide published in 1973"
106 citations
01 Mar 1973
60 citations
Patent•
11 May 1973TL;DR: An improved vanadium-phosphorus mixed oxide was prepared by a unique method employing an organic medium as discussed by the authors, and the substantial intrinsic surface area and the microcrystalline structure of the new oxide result in advantageous activity and selectivity effects in the catalysed vapor phase oxidation of n-butane to maleic anhydride.
Abstract: An improved vanadium-phosphorus mixed oxide is prepared by a unique method employing an organic medium. The substantial intrinsic surface area and the microcrystalline structure of the new oxide result in advantageous activity and selectivity effects in the catalysed vapor phase oxidation of n-butane to maleic anhydride. These oxides are also useful for the production of acid anhydrides from suitable hydrocarbon feeds.
28 citations
TL;DR: In this article, the authors performed transpiration experiments at temperatures between 1000 and 1700°C to study the thermodynamics and defect structure of hypostoichiometric UO 2 -20 wt % PuO 2 solid-solution systems.
27 citations
Patent•
12 Apr 1973TL;DR: A method for the preparation and use of an improved vanadium-phosphorus mixed oxide oxidation catalyst and a novel mixed oxide monohydrate which is a precursor of the catalyst is described in this paper.
Abstract: A method is described for the preparation and use of an improved vanadium-phosphorus mixed oxide oxidation catalyst and of a novel mixed oxide monohydrate which is a precursor of the catalyst.
26 citations
Patent•
15 Jan 1973
TL;DR: In this paper, a method of making a catalyst precursor is proposed, which is capable of forming a first PRECIPTATE COMPRISING COMPOUNDS, of at least one DIVALENT METAL from the group consisting of ZINC, MANGANESE, and MAGNESIUM and at LEAST one TRIValent METAL form the group of OXIDES.
Abstract: 1. A METHOD OF MAKING A CATALYST PRECURSOR WHICH METHOD COMPRISES FORMING A FIRST PRECIPITATE COMPRISING COMPOUNDS, THERMALLY DECOMPOSABLE TO OXIDES, OF AT LEAST ONE DIVALENT METAL FROM THE GROUP CONSISTING OF ZINC, MANGANESE, AND MAGNESIUM AND AT LEAST ONE TRIVALENT METAL FORM THE GROUP CONSISTING OF ALUMINUM AND CHROMIUM WOSE OXIDES ARE CAPABLE OF FORMING TOGETHER A MIXED OXIDE HAVING THE SPINEL STRUCTURE, FORMING A SECOND PRECIPITATE COMPRISING ONE OR MORE COPPER COMPOUNDS THERMALLY DECOMPOSABLE TO OXIDES, WASHING,DRYING AND CALCINING THE TWO PRECIPITATES TO FORM THE METAL OXIDES, THE TWO PRECIPITATES BEING MIXED EITHER PRIOR TO OR SUBSEQUENT TO CALCINING.
25 citations
TL;DR: A new mixed oxide, SiO2-TiO2, prepared by a coprecipitation method showed a surprisingly high acidity and higher catalytic activity and selectivity for the title reaction than SiO 2−Al2O3 as discussed by the authors.
Abstract: A new mixed oxide, SiO2–TiO2, prepared by a coprecipitation method showed a surprisingly high acidity and higher catalytic activity and selectivity for the title reaction than SiO2–Al2O3.
20 citations
Patent•
10 Oct 1973
TL;DR: In this article, the authors used a mixture of molybdenum and bismuth with elements as oxides or mixed oxides at from 280° to 450° C.
Abstract: In the oxidation of α-olefins in the gas phase to α,β-olefinically unsaturated aldehydes and carboxylic acids with molecular oxygen in the presence of an inert gas using a catalyst containing molybdenum and bismuth with elements as oxides or mixed oxides at from 280° to 450° C a content of indium and/or aluminum and/or lanthanum and/or gallium as oxide or mixed oxide results in an improvement in the conversion and/or activity and/or life of the catalyst.
12 citations
11 citations
Patent•
19 Apr 1973
TL;DR: In this paper, a method of electrolyzing brine in a mercury cell, at applied current densities of at least 6 amperes per square inch, employing as the anode a titanium substrate bearing on at least a portion of the surface thereof a mixed oxide coating of from 30 to 90 percent stannic oxide, from 1.0 to 10 percent antimony oxide, and from 0.5 to 30 percent of a valve metal oxide selected from the group consisting of titanium and tantalum oxides.
Abstract: Described is a method of electrolyzing brine in a mercury cell, at applied current densities of at least 6 amperes per square inch, employing as the anode a titanium substrate bearing on at least a portion of the surface thereof a mixed oxide coating of from 30 to 90 percent stannic oxide, from 1.0 to 10 percent antimony oxide, from 1.0 to 50 percent of at least one platinum group metal oxide, and from 0.5 to 30 percent of a valve metal oxide selected from the group consisting of titanium and tantalum oxides.
11 citations
TL;DR: In this article, the authors studied the performance of mixed oxide catalysts of cobalt/molybdenum, cobalt-nickel and nickel/naphase supported on α-alumina.
Patent•
05 Apr 1973
TL;DR: In this article, a synergistic oxide mix is used for decomposing ozone produced by u.v. radiation or corona discharges, in the form of powder, pellets or porous sintered bodies.
Abstract: Catalyst for decomposing ozone produced e.g. by u.v. radiation or corona discharges consists of a synergistic oxide mixT. based on Ni2O3 and NiO with or without doping with Li2O, MnO2, Cu2O and/or Cu, CoO and/or Co3I4, and Ag2O, opt. deposited on a carrier such as a silicate, kieselguhr, hydrated alumina or active carbon, in the form of powder, pellets or porous sintered bodies. The catalysts are effective at temps. above 15 degrees C and have long service life.
TL;DR: A new mixed oxide, SiO2-TiO2, prepared by a coprecipitation method showed a surprisingly high acidity and higher catalytic activity and selectivity for the title reaction than SiO 2−Al2O3.
Abstract: A new mixed oxide, SiO2–TiO2, prepared by a coprecipitation method showed a surprisingly high acidity and higher catalytic activity and selectivity for the title reaction than SiO2–Al2O3.