The invention relates to a process for the production of 1,4-butanediol comprising the preparation of a fermentation broth comprising 1,4-butanediol from renewable sources and water, separation of a liquid fraction comprising said 1,4-butanediol and water from one or more solid fractions, said liquid fraction comprising 2-pyrrolidone in an amount higher than 80 ppm, one or more passages of the resulting liquid fraction through a bed comprising one or more cation-exchange resins thereby providing an output pH of said liquid fraction from 4 to 2, one or more passages of the resulting liquid fraction through a bed comprising one or more anion-exchange resins thereby providing an output pH of said liquid fraction from 8 to 11, and the distillation of the liquid fraction thereby provided so as to obtain a composition having a concentration of said 1,4-butanediol higher than 99.0% by weight and comprising 2-pyrrolidone in an amount lower than 6 ppm. The resulting composition should exhibit an APHA color value after ageing of less than 30.
本发明涉及一种生产
1,4-丁二醇的工艺,包括制备由可再生资源中的
1,4-丁二醇和
水组成的发酵液,将由所述
1,4-丁二醇和
水组成的液体馏分从一种或多种固体馏分中分离出来,所述液体馏分中
2-吡咯烷酮的含量高于 80 ppm、将得到的液体馏分一次或多次通过一个由一种或多种阳离子交换
树脂组成的床层,从而使所述液体馏分的输出 pH 值为 4 至 2,将得到的液体馏分一次或多次通过一个由一种或多种阴离子交换
树脂组成的床层,从而使所述液体馏分的输出 pH 值为 8 至 11,对由此得到的液体馏分进行蒸馏,以获得一种组合物,其所述
1,4-丁二醇的浓度高于 99.0% (以重量计),且
2-吡咯烷酮的含量低于 6 ppm。所得到的组合物在老化后的 APHA 色值应小于 30。