Title:
PROCESS FOR THE PREPARATION OF DIMETHYLAMINE
Document Type and Number:
WIPO Patent Application WO/2004/002937
Kind Code:
A1
Abstract:
Conventional zeolite catalysts for the preparation of dimethylamine from methanol or a methylamine mixture and ammonia have a disadvantage in that the selectivity for dimethylamine is steeply lowered when the conversion of methanol becomes 95% or above. The invention aims at overcoming the disadvantage to thereby provide a novel zeolite catalyst attaining a higher selectivity for dimethylamine, a lower selectivity for trimethylamine, and a higher activity for methanol-consumption reaction. A process for preparing dimethylamine by conducting a reaction between methanol and ammonia, among methanol, a methylamine mixture, and ammonia, or between a methylamine mixture and ammonia in the presence of a zeolite catalyst in a vapor phase, wherein the reaction is conducted in the presence of a zeolite catalyst treated with a solution of an organophosphorus compound.
Inventors:
HIROHATA JITSUO
HOSHINO MANABU
KANEKO ISAO
HOSHINO MANABU
KANEKO ISAO
Application Number:
PCT/JP2003/006216
Publication Date:
January 08, 2004
Filing Date:
May 19, 2003
Export Citation:
Assignee:
MITSUBISHI RAYON CO (JP)
International Classes:
C07B61/00; C07C209/02; C07C209/16; C07C211/04; (IPC1-7): C07C211/04; C07B61/00; C07C209/02; C07C209/16
Foreign References:
| EP0210718A1 | 1987-02-04 | |||
| EP0125616A1 | 1984-11-21 |
Other References:
See also references of EP 1516868A4
Attorney, Agent or Firm:
Asamura, Kiyoshi (New Ohtemachi Bldg. 2-1, Ohtemachi 2-chom, Chiyoda-ku Tokyo, JP)
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