Process for the preparation of N-alkylated anilines

Details Process for the preparation of N-alkylated anilines Process for the preparation of N-alkylated anilines

1990-07-12

1991-10-08

Raymond, Richard L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

564399, 558418, C07C20918, C07C25330

Patent

active

050556177

ABSTRACT:
Anilines or N-alkyl-anilines are advantageously reacted with alkyl alcohols or the associated dialkyl ethers at elevated temperature in the gas phase, if a .gamma.-Al.sub.2 O.sub.3 is used that is prepared by dehydration of an aluminum oxide/hydroxide hydrate and has a BET surface area from 50 to 400 m.sup.2 /g and a surface acidity of 5 to 600 mmol H.sup.+ /kg.

REFERENCES:
patent: 1799722 (1931-04-01), Arnold
patent: 2565842 (1951-08-01), Hetzner et al.
patent: 3957874 (1976-05-01), Dockner et al.
patent: 4029707 (1977-01-01), Hargis
patent: 4400537 (1983-08-01), Weil
patent: 4613705 (1986-09-01), Hargis
patent: 4801752 (1989-01-01), Chen et al.
Houben-Weyl, Methoden der organischen Chemie, vol. X1/1; Stickstoffverbindungen II; 1957, pp. 112-119; George Thieme Verlag; Stuttgard, DE.

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