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
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), Vol. 36:2; Other Information: Translated from Izestiya Akademii Nauk SSSR, Seriya Khimicheskaya; 36: No. 2, 266-272(Feb 1987)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
2-METHYLPROPENE
AROMATIZATION
HETEROGENEOUS CATALYSIS
POLYMERIZATION
CATALYSTS
MATERIALS TESTING
PROPYLENE
ZEOLITES
CATALYTIC EFFECTS
COMPARATIVE EVALUATIONS
ALUMINIUM OXIDES
AROMATICS
CHEMICAL REACTION YIELD
METHANE
MORDENITE
SILICATE MINERALS
ALKANES
ALKENES
ALUMINIUM COMPOUNDS
CATALYSIS
CHALCOGENIDES
CHEMICAL REACTIONS
HYDROCARBONS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
MATERIALS
MINERALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
TESTING
YIELDS
400201* - Chemical & Physicochemical Properties