Production method for 1, 4-butanediol

摘要

The purpose of the present invention is to efficiently remove impurities that are mixed in during industrial-scale production of a biomass resource-derived 1, 4-BG and produce a high quality 1, 4-BG that can be used as a PBT raw material having good color tone. The present invention relates to a production method for refined 1, 4-BG obtained from a side stream of the distillation of crude 1, 4-BG-containing liquid obtained after: a step in which a refined raw material 1, 4-BG obtained from a fermentation culture having bacterial cells, salt, and water removed therefrom is distilled and high-boiling point components and/or low-boiling point components are removed therefrom; and/or a step in which unsaturated compounds are converted into hydrides.