Thermodynamic analysis of reactions of catalytic heterocyclization of C/sub 6/-hydrocarbons and hydrogen sulfide to alkylthiophenes
Alkylthiophenes were synthesized from n-hexane and hydrogen sulfide by heterocyclization. C/sub 6/-Hydrocarbons (normal and iso-) can form ethyl- and dimethylthiophenes in the presence of a chromium oxide catalyst under atmospheric pressure at 820/sup 0/K. During this reaction normal C/sub 6/ hydrocarbons undergo heterocyclization but in addition are dehydrocyclized to benzene whereas those of iso-structure are not subject to dehydrocyclization. Hydrocarbons of iso-structure (paraffins and olefins) were shown to undergo heterocyclization and their rate factor was greater, in comparison with C/sub 6/ hydrocarbons of normal structure - n-hexane and hex-l-ene. In order to establish the degree of removal from the equilibrium in the reaction system and to evaluate the possibility of increasing the yield of intermediate heterocyclization products on a Cr catalyst, thermodynamic analysis of the equilibrium reactions using different temperatures were carried out.
- OSTI ID:
- 5404065
- Journal Information:
- Pet. Chem. USSR (Engl. Transl.); (United States), Journal Name: Pet. Chem. USSR (Engl. Transl.); (United States) Vol. 24:4; ISSN PECHA
- Country of Publication:
- United States
- Language:
- English
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023000 -- Petroleum-- Properties & Composition
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400103* -- Radiometric & Radiochemical Procedures-- (-1987)
ALKANES
ATMOSPHERIC PRESSURE
CATALYSIS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CHROMIUM COMPOUNDS
CHROMIUM OXIDES
DATA
DEHYDROCYCLIZATION
EQUILIBRIUM
EXPERIMENTAL DATA
HETEROCYCLIC COMPOUNDS
HEXANE
HIGH TEMPERATURE
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
INFORMATION
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLYCYCLIC SULFUR HETEROCYCLES
REACTION INTERMEDIATES
SULFIDES
SULFUR COMPOUNDS
SYNTHESIS
TEMPERATURE DEPENDENCE
THERMODYNAMICS
TRANSITION ELEMENT COMPOUNDS
YIELDS