Method for making methylamines

Details Method for making methylamines Method for making methylamines

B - Operations, Transporting

01

J

B01J 29/18 (2006.01) B01J 31/02 (2006.01) C01B 39/26 (2006.01) C07C 209/16 (2006.01)

Patent

CA 2223844

A method for preparing a modified ammonium mordenite, wherein (1) an ammonium mordenite is dried under such conditions that the mordenite remains in ammonium form, and (2) the resulting dried ammonium mordenite is processed with gas-phase tetrachlorosilane at 300-600 ·C. The resulting modified ammonium mordenite is used as a catalyst for producing methylamines from a gaseous mixture of methanol and ammonia. High dimethylamine selectivities are achieved.

Procédé de préparation d'une mordénite sous forme ammonium modifiée, caractérisé en ce qu'il comprend: (1) le séchage d'une mordénite sous forme ammonium dans des conditions telles que la mordénite soit maintenue sous forme ammonium, et (2) le traitement de la mordénite sous forme ammonium séchée ainsi obtenue par du tétrachlorosilane en phase gazeuse, à une température comprise entre 300 et 600 ~C. La mordénite sous forme ammonium modifiée ainsi obtenue est utilisée comme catalyseur pour la production de méthylamines à partir d'un mélange gazeux de métanol et d'ammoniac; de hautes sélectivités en diméthylamine sont obtenues.

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