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Comparative study of transformations of C/sub 3/H/sub 6/ and i-C/sub 4/H/sub 8/ on zeolites of the pentasil and mordenite type

Journal Article · · Bull. Acad. Sci. USSR, Div. Chem. Sci. (Engl. Transl.); (United States)
DOI:https://doi.org/10.1007/BF00959353· OSTI ID:5846277
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The properties of high-silicon pentasils and mordenites of varying composition were compared in transformations of propylene and isobutylene and it was shown that mordenites are approx. 10 times less active in the oligomerization reaction; they are also less active in the reactions of aromatization and redistribution of hydrogen and are deactivated during operation. Dealumination slightly increases the activity and stability of mordenites. The activity of pentasils and mordenites in oligomerization of olefins virtually does not change with an increase in the SiO/sub 2//Al/sub 2/O/sub 3/ ratio from approx. 30 to 280-300, while the aromatization reaction is more sensitive to a change in the concentration of Al in the backbone of the zeolites with SiO/sub 2//Al/sub 2/O/sub 3/ approx. = 300, the yield of aromatic hydrocarbons decreases. The differences in the catalytic properties of high-silicon pentasils and mordenites in transformations of lower olefins are primarily due to the features of the structure of these zeolites, which determine their different stability in the conditions of a catalytic reaction.

Research Organization:
N.D. Zelinskii Institute of Organic Chemistry, Moscow, USSR
OSTI ID:
5846277
Journal Information:
Bull. Acad. Sci. USSR, Div. Chem. Sci. (Engl. Transl.); (United States), Journal Name: Bull. Acad. Sci. USSR, Div. Chem. Sci. (Engl. Transl.); (United States) Vol. 36:2; ISSN BACCA
Country of Publication:
United States
Language:
English

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Related Subjects

2-METHYLPROPENE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALKANES
ALKENES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
AROMATICS
AROMATIZATION
CATALYSIS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
COMPARATIVE EVALUATIONS
HETEROGENEOUS CATALYSIS
HYDROCARBONS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
MATERIALS
MATERIALS TESTING
METHANE
MINERALS
MORDENITE
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLYMERIZATION
PROPYLENE
SILICATE MINERALS
TESTING
YIELDS
ZEOLITES