Izvestiya of Saratov University.
ISSN 1816-9775 (Print)
ISSN 2541-8971 (Online)


Modified High Silicon Zeolite Catalyst

N-hexane and gasoline fraction conversion on bismuthchromezeolite catalyst at 300-500°C was researched. It was showed that in cataly­ sate total content of izomerization products reduce. The maximum content of aromatic hydrocarbons is 16.5% at 450°C and minimum benzene formation (0.8%). Ennoblement of gasoline fraction on bismuthchromezeolite catalyst contributes increase octane number on 29 points at 400°C. Benzene content is 1.4% that accord with environmental requirements of motor fuels.

Study of the activity of bifunctional catalyzers on the transformation of n-hexane

The production of various motor fuels is carried out by processing light fractions of oil with an initial temperature of boiling to 350°С. The current trend shows that oil in new fi elds has more weight than before. New oil reservoirs are deeper with a greater proportion of dark fraction with a boiling point of 350°С. This situation stimulates to fi nd new ways of increasing the processing depth light fractions for synthesis target product. One of the main solution path for the problem is creation of new catalytic systems or modernization of existing ones.

Превращения н-гексана и стабильного гидрогенизата на поверхности высокомодульных цеолитных систем

Исследованы превращения н-гексана и стабильного гидрогенизата (температура кипения 85–180 °С) в интервале температур 250–500 °С. Установлено, что процесс превращения н-гексана включает в себя реакции крекинга, изомеризации и ароматизации. Направление химических превращений зависит от параметров активации и условий протекания процесса. Конверсия стабильного гидрогенизата позволяет получать высокооктановые компоненты топлива.


Исследовано превращение н-гексана на высококремнистом цео-
лите, промотированном медью и гадолинием при 300–500 °С.
Показано, что использование данной системы целесообразно
для получения продуктов крекинга.

Thermodynamic Analysis of Transformation Isomerization Reaction of n-Hexane on Zeolite Systems ZSM-5, Cr-Bi-ZSM-5

A comparative analysis of dependencies isomerization reaction, and the formation reaction of isobutane, isopentane in the temperature range from 573 to 673 K at the high-silicon ZSM-5 system and the same system modified with oxides of bismuth, and chromium.

Increase of Activity Industrial Catalys for Isomerisation Normal Hydrocarbons

Was done the studie of activity zeolite-containing catalyst Cr2О3 +Bi2О3 /ZSM-5 and technical catalyst SI-2, also they combained action in process of conversion of n-hexane at lay-by-layers download. In the process of conversion n-hexane on Cr2О3 +Bi2О3 /ZSM-5 catalyst prevails reaction of cracking and destroy of n-hexane to two symmetric molecule of propane (51,4%). Lay-by-layers download of Cr2О3 +Bi2О3 /ZSM-5 and SI-2 catalysts with high conversion nhexane to achieve a lot of contents iso-hydrocarbons in products of conversion with 200 oC.