Continuous manufacture of poly(trimethylene terephthalate)

Details Continuous manufacture of poly(trimethylene terephthalate) Continuous manufacture of poly(trimethylene terephthalate)

C - Chemistry, Metallurgy

08

G

C08G 63/00 (2006.01)

Patent

CA 2632699

This invention relates to a continuous process for production of poly(trimethylene terephthalate), wherein gaseous 1,3-propanediol by-product resulting from the process is condensed in a condenser, the total amount of any trimethylene terephthalate cyclic dimer and poly(trimethylene terephthalate) in the condensed by-product 1,3 propanediol is adjusted, and a portion of the condensed by-product is recycled to the condenser while another portion is recycled back into the process.

L'invention concerne un procédé de production en continu de poly(triméthylène téréphtalate), dans lequel le sous-produit gazeux de 1,3-propanediol engendré par le procédé est condensé dans un condenseur, la quantité totale de dimère cyclique de triméthylène téréphtalate et de poly(triméthylène téréphtalate) dans le sous-produit condensé de 1,3 propanediol est réglée, et une partie du sous-produit condensé est recyclée vers le condenseur tandis qu'une autre partie est recyclée dans le procédé.

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