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    Process for enriching enantiomers from an enantiomer mixture
    1.
    发明授权
    Process for enriching enantiomers from an enantiomer mixture 审中-公开

    公开(公告)号：US10669222B2

    公开(公告)日：2020-06-02

    申请号：US16338633

    申请日：2017-10-05

    Applicant: BASF SE

    Inventor： Sebastian Wloch ,  Gunnar Heydrich ,  Matthias Rauls

    IPC: C07C29/78 ,  C07C29/17 ,  B01D9/00

    Abstract: The present invention relates to a process for enriching enantiomers from an enantiomer mixture by a fractionating melt crystallization in a melt crystallization apparatus. The invention specifically relates to a process for producing an enantiomer-enriched chiral terpene, in particular of D/L-Isopulegol. The process comprises: i) a crystallization step to obtain a crystallizate and a mother melt and removal of the mother melt from the crystallizate to afford a mother melt fraction; ii) sweating of the crystallizate obtained in step i) to afford a molten sweating fraction and iii) subsequent melting of the sweated crystallizate to afford a molten crystallizate fraction, wherein the optical rotation at least of the sweating fraction is determined online using a polarimeter and the changeover from step ii) to step iii) is controlled online by means of at least one control unit.

    Method for obtaining crystalline 2′-fucosyllactose
    4.
    发明授权
    Method for obtaining crystalline 2′-fucosyllactose 有权

    公开(公告)号：US11685759B2

    公开(公告)日：2023-06-27

    申请号：US17286474

    申请日：2019-10-17

    Applicant: BASF SE

    Inventor： Michael Puhl ,  Sebastian Wloch ,  Peter Oedman ,  Anne-Catrin Letzel ,  Hartwig Schroeder ,  Jacek Malisz ,  Daniel Seibert-Ludwig ,  Emiel Jan Kappert ,  Chung Huan Wong ,  Michael Barros Gross ,  Martin Viertelhaus

    IPC: C07H1/08 ,  C07H3/06

    CPC classification number: C07H1/08 ,  C07H3/06 ,  C07B2200/13

    Abstract: The present invention relates to a method for obtaining crystalline 2′-fucosyllactose from a 2′-FL raw material, which contains 2′-FL as a main constituent and at least 0.5% by weight, frequently at least 1% by weight, in particular at least 2% by weight, more particularly at least 5% by weight, and especially at least 8% by weight,based on the total amount of mono-and oligosaccharides in the raw material, of one or more mono- or oligosaccharides different from 2′-FL, where the method comprises a)providing a solution of the 2′-FL raw material in water, which does not contain more than 10% by weight, preferably not more than 7% by weight, more preferably not more than 5% by weight of organic solvents, based on the total amount of water; b) effecting the crystallization of 2′-FL from the solution provided in step a) by inducing conditions of a controlled super saturation in the solution; and c) separating crystalline 2′-FL from the mother liquor, and where during controlled supersaturation in step b) not more than 10% by weight, preferably not more than 7% by weight, more preferably not more than 5% by weight of organic solvents are present, based on the total amount of water present during step b).

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