Methyl methacrylate purification process

C - Chemistry – Metallurgy – 07 – C

Patent

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Details

C07C 67/60 (2006.01) C07C 69/54 (2006.01)

Patent

CA 2744402

A process for purifying methyl methacrylate (MMA) is described. The process involves contacting liquid MMA having impurities therein with a sulphonic acid resin, in the presence of formaldehyde or a suitable source of methylene or ethylene of formula I. R5 and R6 are independently selected from C1-C12 hydrocarbons or H; X is either O or S; n is an integer from, 1 to 100; and m is 1 or 2: The compound of formula I may be suitable source of formaldehyde.

L'invention concerne un procédé de purification de méthacrylate de méthyle (MMA). Le procédé implique la mise en contact du MMA liquide contenant des impuretés avec une résine d'acide sulfonique, en présence de formaldéhyde ou d'une source de méthylène ou d'éthylène appropriée de formule I. R5 et R6 sont indépendamment choisis parmi des hydrocarbures en C1-C12 ou H ; X représente O ou S ; n est un nombre entier de 1 à 100 ; et m vaut 1 ou 2. Le composé de formule I peut être une source appropriée de formaldéhyde.

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