Alumina-supported technetium as a hydrocarbon conversion catalyst

Journal Article · Wed Jun 01 00:00:00 EDT 1983 · Dokl. Phys. Chem. (Engl. Transl.); (United States)

OSTI ID:5033227

Isagulyants, G V; Sterligov, O D; Barkova, A P; Babashova, T V

Supported technetium has been proposed for the aromatization of n-heptane and the dehydrogenation of six-membered cyclic compounds. Here, supported technetium was studied as a catalyst for the conversion of saturated hydrocarbons including cyclohexane, n-hexane, and methylcyclopentane and the catalytic properties of this metal were compared with those of rhenium and manganese. Catalysts containing 4.2 at.% technetium, rhenium, or manganese were prepared by the impregnation of ..gamma..-Al/sub 2/O/sub 3/ by aqueous solutions of NH/sub 4/TcO/sub 4/, NH/sub 4/ReO/sub 4/, and Mn(OAc)/sub 2/ x 4H/sub 2/O, respectively. The major pathways in the catalysis of reactions of n-hexane on Tc/Al/sub 2/O/sub 3/, were dehydrogenation to monoolefins, aromatization, and C/sub 5/-dehydrocyclization to yield benzene and methylcyclopentenes. The five-membered ring of methylcyclopentane on Tc/Al/sub 2/O/sub 3/, underwent hydrogenolysis resulting in hexenes and n-hexane but the major reactions were dehydrogenation and dehydroisomerizaion with the formation of methylcyclopentenes and methylcyclopentadienes as well as benzene. Comparison of the results obtained for low-percentage catalysts containing technetium, rhenium, and manganese on alumina showed that Tc/Al/sub 2/O/sub 3/ was superior relative to dehydrogenating activity over the analogous rhenium and manganese catalysts in the catalytic conversion of n-hexane, methylcyclopentane, and especially, cyclohexane. 3 figures, 1 table.

• Research Organization: N.D. Zelinskii Inst. of Organic Chemistry, Moscow, USSR
• OSTI ID: 5033227
• Journal Information: Dokl. Phys. Chem. (Engl. Transl.); (United States), Journal Name: Dokl. Phys. Chem. (Engl. Transl.); (United States) Vol. 270:4-6; ISSN DKPCA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ALKANES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
AROMATIZATION
CATALYSIS
CATALYST SUPPORTS
CHALCOGENIDES
CHEMICAL REACTIONS
CYCLOALKANES
CYCLOHEXANE
DEHYDROGENATION
ELEMENTS
HEXANE
HYDROCARBONS
MANGANESE
METALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
RHENIUM
TECHNETIUM
TRANSITION ELEMENTS