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rdf:type
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Description
| - Pyridin a jeho methylové deriváty byly syntetizovány v plynné fázi z ethanolu, formaldehydu a amoniaku. Reakce byla katalyzována několika typy zeolitů (H-ZSM-5, Beta, Mordenit) a SiO2. Selektivitu vzniku pyridinu i alkylpyridinů byla silně ovlivňována jednak poměrem Si/Al a také modifikací zeolitů zinkem. Nejvyšší výtěžek pyridinu byl získán reakcí katalyzovanou zeolitem ZSM-5 modifikovaným zinkem a nejvyššího poměru pyridin/alkylparidiny bylo dosaženo při použití H-ZSM-5 s vysokým obsahem křemíku (Si/Al 140). (cs)
- Pyridine and its methyl derivatives were synthesized in vapor phase from ethanol, formaldehyde and ammonia over zeolites H-ZSM-5, Beta, mordenite and over SiO2. Both the Si/Al molar ratio and modification of zeolite with zinc strongly influenced the selectivity in pyridine and alkylpyridines formation. The highest yield of pyridine was obtained over ZSM-5 modified with zinc and the highest pyridine-to-alkylpyridines ratio was achieved over H-ZSM-5 with high Si content (Si/Al ratio 140). The conversion of ethanol and the selectivity in pyridine formation were correlated with the acidity of used catalyst.
- Pyridine and its methyl derivatives were synthesized in vapor phase from ethanol, formaldehyde and ammonia over zeolites H-ZSM-5, Beta, mordenite and over SiO2. Both the Si/Al molar ratio and modification of zeolite with zinc strongly influenced the selectivity in pyridine and alkylpyridines formation. The highest yield of pyridine was obtained over ZSM-5 modified with zinc and the highest pyridine-to-alkylpyridines ratio was achieved over H-ZSM-5 with high Si content (Si/Al ratio 140). The conversion of ethanol and the selectivity in pyridine formation were correlated with the acidity of used catalyst. (en)
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Title
| - Synthesis of pyridines over zeolites in gas phase
- Synthesis of pyridines over zeolites in gas phase (en)
- Syntéza pyridinů v plynné fázi na zeolitech (cs)
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skos:prefLabel
| - Synthesis of pyridines over zeolites in gas phase
- Synthesis of pyridines over zeolites in gas phase (en)
- Syntéza pyridinů v plynné fázi na zeolitech (cs)
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skos:notation
| - RIV/61388955:_____/07:00091836!RIV08-AV0-61388955
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http://linked.open.../vavai/riv/strany
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http://linked.open...avai/riv/aktivita
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http://linked.open...avai/riv/aktivity
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http://linked.open...iv/cisloPeriodika
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http://linked.open...vai/riv/dodaniDat
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http://linked.open...aciTvurceVysledku
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http://linked.open.../riv/druhVysledku
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http://linked.open...iv/duvernostUdaju
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http://linked.open...titaPredkladatele
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http://linked.open...dnocenehoVysledku
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http://linked.open...ai/riv/idVysledku
| - RIV/61388955:_____/07:00091836
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http://linked.open...riv/jazykVysledku
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http://linked.open.../riv/klicovaSlova
| - pyridine; pyridine bases; ZSM-5; ethanol (en)
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http://linked.open.../riv/klicoveSlovo
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http://linked.open...odStatuVydavatele
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http://linked.open...ontrolniKodProRIV
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http://linked.open...i/riv/nazevZdroje
| - Collection of Czechoslovak Chemical Communications
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http://linked.open...in/vavai/riv/obor
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http://linked.open...ichTvurcuVysledku
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http://linked.open...cetTvurcuVysledku
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http://linked.open...UplatneniVysledku
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http://linked.open...v/svazekPeriodika
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http://linked.open...iv/tvurceVysledku
| - Čejka, Jiří
- Bejblová, Martina
- Slobodník, M.
- Cvengrošová, Z.
- Hronec, M.
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http://linked.open...n/vavai/riv/zamer
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issn
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number of pages
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