Synthesis of Diphenylamine Catalyzed by Zeolites.

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F03%3A54030283" target="_blank" >RIV/61388955:_____/03:54030283 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Synthesis of Diphenylamine Catalyzed by Zeolites.

Original language description

Catalytic activity of various molecular sieves, activated bentonite and BF3.etherate was investigated in the condensation of aniline to diphenylamine. Among the tested catalysts, the zeolite Beta with a Si/Al ratio = 12.5 exhibited the highest activity (ca. 34 % aniline conversion) and selectivity (above 98 %) for diphenylamine formation. Zeolites Beta with higher Si/Al ratio were less active but the selectivity to diphenylamine remained almost the same. It is assumed that the differences in the catalytic activities of molecular sieves are not caused only by the differences in the pore geometry but depends also on the concentration of acid sites. The type of acid sites, Broensted or Lewis sites, does not significantly influence the catalytic performance. Strong acid sites prepared by activation of bentonite with hydrochloric acid are probably responsible for the formation of by-products and the resulting catalyst is, thus, less selective to diphenylamine formation.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

CF - Physical chemistry and theoretical chemistry

OECD FORD branch

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Project

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Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2003

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Applied Catalysis. A - General

ISSN

0926-860X

e-ISSN

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Volume of the periodical

255

Issue of the periodical within the volume

N/A

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

6

Pages from-to

197-202

UT code for WoS article

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EID of the result in the Scopus database

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