Process for producing 1,4-butanediol from renewable sources and polyesters obtained therefrom

摘要

The present invention relates to the preparation of a fermentation broth comprising water and 1,4-butanediol from a renewable source, separation of a liquid fraction comprising water from the 1,4-butanediol and one or more solid fractions (the liquid fraction is 80 including 2-pyrrolidone in an amount greater than ppm), at least one passage of the obtained liquid fraction through a bed comprising at least one cation-exchange resin, thereby providing an output pH of the liquid fraction of 4 to 2 And at least one passage of the obtained liquid fraction through a bed comprising at least one anion-exchange resin, thereby providing an output pH of the liquid fraction of 8 to 11, and distillation of the liquid fraction, thereby 1, It relates to a process for the preparation of 1,4-butanediol provided to obtain a composition having a concentration of 4-butanediol greater than 99.0% by weight and comprising 2-pyrrolidone in an amount less than 6 ppm. The resulting composition should exhibit an APHA color value of less than 30 after aging.