Механизм метилирования анилина на цеолитных катализаторах по данным спектроскопии ЯМР 13C in situ - Conference attendances

Механизм метилирования анилина на цеолитных катализаторах по данным спектроскопии ЯМР 13C in situ Conference attendances

Language

Английский

Participant type

Устный

Conference

VI Russian Conference on Catalytic Reaction Mechanisms
01-05 Oct 2002 , Москва

Authors

Ivanova Irina Igorevna ¹ , Pomakhina E B ¹ , Rebrov A I ² , Wang W ² , Khunger M ³ , Veitkamp E ³

Affiliations

1	Lomonosov Moscow State University
2	Topchiev Institute of Petrochemical Synthesis RAS
3	University of Stuttgart

OP-III-5 Механизм метилирования анилина на цеолитных катализаторах по данным ЯМР спектроскопии in situ In situ 13C MAS NMR was applied to study the mechanisms of N-and C-alkylation of aniline with methanol over Y type zeolite catalysts (HY, CsOH/CsNa Y, V 2O5/DealY). On acidic catalysts, the reaction proceeds via methanol dehydration leading to dimethyl ether or methoxy surface groups, which further react with aniline to give N-methyalaniline, N,N-dimethylaniline and trimethylanilinium cation. At elevated temperatures, methylanilines convert to toluidines via a secondary isomerization or disproportionation reactions. On basic and redox catalysts, the reaction pathway includes methanol dehydrogenation leading to formaldehyde species, alkylation of aniline with formaldehyde to give N-methyleneaniline and hydrogenation of N-methyleneaniline to N-methylaniline. Секция: Секция III: Methods of investigation of the mechanisms of catalytic reactions

Ivanova I. , Pomakhina E.B. , Rebrov A.I. , Wang W. , Khunger M. , Veitkamp E.
Механизм метилирования анилина на цеолитных катализаторах по данным спектроскопии ЯМР 13C in situ
VI Russian Conference on Catalytic Reaction Mechanisms 01-05 Oct 2002