Process for preparing dimethyl-terephtalate from polyester...

C - Chemistry – Metallurgy – 07 – C

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260/473.4

C07C 63/26 (2006.01) C08G 63/16 (2006.01) C08G 63/18 (2006.01) C08J 11/00 (2006.01)

Patent

CA 1039742

PRECIS DE LA DIVULGATION L'invention concerne un nouveau procédé de transformation de téréphtalate de bis (diol) en téréphtalate de diméthyle. Il est effectué par interéchange en milieu méthanolique, en présence de méthylate de magnésium comme catalyseur. Le procédé permet la régénération de téréphtalate de diméthyle à partir de déchets de fils ou films en polytéréphtalates ou copolytéréphtalates pour fabriquer des polytéréphtalates ou copolytéréphtalates utilisables pour la fabrication de fils ou films par exemple.

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