PRODUCTION OF METHYLAMINE

Japanese Patent JP3171763

B2

PURPOSE: To profitably obtain the subject compound little in the amount of trimethylamine by performing a disproportionation reaction in the presence of a specific catalyst at a specified temperature and also performing a main reaction at a specified temperature, and subsequently distilling out methylamine at a specific pressure, when CH3OH is reacted with NH3 and a methylamine mixture in a gaseous phase.
CONSTITUTION: In this method for producing methylamine by catalytically reacting (A1) CH3OH with (A2) a methylamine in a gaseous phase, A2 is reacted with B1 in the presence of a solid acid catalyst having an average particle diameter of ≤15&angst to subject B1 to a disproportionation reaction for reducing the amount of (T) trimethylamine. The obtained methylaminecontaining mixture (B2) is wholly or partially reacted with A1 and A2 in the presence of (C) a silylated solid acid catalyst. Therein, the main reaction is performed, while the difference between the inlet temperature of the C layer and the highest temperature in the C layer is ≤50°C. (B) the obtained methylamine-containing mixture (B3) and a part of B2 are subjected to a distillation treatment at a pressure of 10-25kg/cm2G to distill out the whole amount of T contained in the mixture as the azeotropic mixture with A2 from the tower top, and T is subsequently fed to a disproportionation reaction to obtain the objective compound.

Takeshi Yasutake
Noriyuki Iwanaga

JP31319794A

June 04, 2001

December 16, 1994

Click for automatic bibliography generation  

Mitsui Chemicals, Inc.

B01J29/18; C07B61/00; C07C209/16; C07C211/04; (IPC1-7): C07C211/04; B01J29/18; C07C209/16

JP72740A
JP3262540A
JP57169445A
JP7233125A
JP5646846A
JP227335B2
JP6247172B2
JP322378B2
JP216743B2
JP22876B2
JP38331B2

Previous Patent: 版パー

Next Patent: THIN-FILM MIS DIODE AND MANUFACTURE THEREOF