Synthesis of Diphenylamine Catalyzed by Zeolites.

Kód výsledku v 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>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

Synthesis of Diphenylamine Catalyzed by Zeolites.

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Synthesis of Diphenylamine Catalyzed by Zeolites.

Popis výsledku anglicky

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.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

—

Projekt

—

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2003

Kód důvěrnosti údajů

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

Název periodika

Applied Catalysis. A - General

ISSN

0926-860X

e-ISSN

—

Svazek periodika

255

Číslo periodika v rámci svazku

N/A

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

6

Strana od-do

197-202

Kód UT WoS článku

—

EID výsledku v databázi Scopus

—