Abstract: A method for preparing bio-based 1,4-butanediol (BDO) is provided, including: mixing succinic acid from a bio-based source and an alcohol compound to obtain a mixture, and subjecting the mixture to esterification to obtain an oligomer polyester; subjecting the oligomer polyester to hydrogenation reduction in the presence of a catalyst to obtain a 1,4-BDO crude product; and purifying the 1,4-BDO crude product to obtain the bio-based 1,4-BDO.

Abstract: Provided is a method for preparing 1,2-pentanediol, including subjecting 2-hydroxypentanal and hydrogen to hydrogenation reduction under an action of a catalyst to obtain the 1,2-pentanediol; wherein the catalyst is a supported nickel-based catalyst; the supported nickel-based catalyst comprises a carrier and an active component supported on the carrier; the active component comprises a first component and a second component; the first component is a nickel compound; and the second component is one or more selected from the group consisting of a copper compound, a cobalt compound, a platinum compound, an iridium compound, a rhodium compound, and a rhenium compound.

Abstract: A method for preparing bio-based 1,4-butanediol (BDO) is provided, including: mixing succinic acid from a bio-based source and an alcohol compound to obtain a mixture, and subjecting the mixture to esterification to obtain an oligomer polyester; subjecting the oligomer polyester to hydrogenation reduction in the presence of a catalyst to obtain a 1,4-BDO crude product; and purifying the 1,4-BDO crude product to obtain the bio-based 1,4-BDO.

Abstract: The present disclosure relates to the technical field of hexanediol production, and provides a production method and a production device of high-purity 1,6-hexanediol. A dipic acid and a C6 mixed alcohol are mixed to conduct esterification to obtain a product feed liquid including an adipic acid diester, and the high-purity 1,6-hexanediol is obtained through hydrogenation reduction and distillation. In addition to being used as a reaction raw material, the C6 mixed alcohol further acts as a water-carrying agent; water produced by the esterification is removed by azeotropy, thereby promoting a smooth reaction process to realize the esterification without a catalyst. The method does not need the catalyst during esterification, and the subsequent hydrogenation reduction can be directly conducted with no complicated post-treatment procedure required after the esterification.