Synthesis and properties of hydrorefining catalysts. II. The state of molybdenum in alumina-molybdenum catalysts and their catalytic properties in the hydrogenolysis of thiophene
A series of alumina-molybdenum specimens containing 3 to 25% Mo have been prepared by the adsorption of molybdenum from solutions of ammonium paramolybdate onto ..gamma..-Al/sub 2/O/sub 3/. X-ray diffraction studies have been conducted on the specimens, and the uv spectra of the aqueous and ammonia extracts have been recorded. Chemical and spectral analysis of them and the x-ray diffraction data give reasons to postulate the presence of aluminum molybdate, isopoly compounds, and molybdenum oxides on the surface of calcined specimens. The amount of Al/sub 2/(MoO/sub 4/)/sub 3/ formed is limited by the calcination temperature, while the concentration of isopoly compounds and MoO/sub 3/ increases with an increase in the molybdenum content of the specimens. A definite correlation is observed between the catalytic activity and the compounds formed, which form sites which are active in the hydrogenolysis of the thiophene after activation in a reducing atmosphere.
- Research Organization:
- Inst. of Organic Chemistry, Sofia, Bulgaria
- OSTI ID:
- 6397492
- Journal Information:
- Kinet. Catal. (Engl. Transl.); (United States), Journal Name: Kinet. Catal. (Engl. Transl.); (United States) Vol. 23:2; ISSN KICAA
- Country of Publication:
- United States
- Language:
- English
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ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CATALYSIS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
COHERENT SCATTERING
DATA
DESULFURIZATION
DIFFRACTION
ELEMENTS
EXPERIMENTAL DATA
HETEROCYCLIC COMPOUNDS
HYDROGENATION
INFORMATION
METALS
MOLYBDENUM
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
SCATTERING
SPECTRA
SYNTHESIS
THIOPHENE
TRANSITION ELEMENTS
ULTRAVIOLET SPECTRA
X-RAY DIFFRACTION