Process for the production of high purity melamine from urea

Details Process for the production of high purity melamine from urea Process for the production of high purity melamine from urea

C - Chemistry, Metallurgy

07

D

C07D 251/62 (2006.01) B01J 8/00 (2006.01) B01J 8/02 (2006.01)

Patent

CA 2421275

A method for purifying melamine comprising impurities like ureido-melamine, oxotriazines, melam, melem, comprises the step of putting into contact at a temperature comprised between 340 ~C and 410 ~C and at a pressure comprised between 8 and 17 MPa a melamine melt with a bed of a catalyst thus obtaining melamine with a purity of at least 99 %.

L'invention concerne un procédé de purification de mélamine renfermant des impuretés, telles que l'ureidomelamine, des oxotriazines, le melam, le melem. Le procédé consiste à mettre en contact à une température comprise entre 340 ·C et 410 ·C et à une pression comprise entre 8 et 17 MPa de la mélamine fondue et un lit d'un catalyseur, produisant ainsi de la mélamine d'une pureté d'au moins 99 %.

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