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    Method of reprocessing alkanesulfonic acid
    5.
    发明授权
    Method of reprocessing alkanesulfonic acid 有权

    公开(公告)号：US10214485B2

    公开(公告)日：2019-02-26

    申请号：US15774722

    申请日：2016-11-08

    Applicant: BASF SE

    Inventor： Jan Spielmann ,  Michael Koch ,  Juergen Wortmann ,  Sabine Weiguny ,  Feelly Ruether ,  Robert Sengpiel

    IPC: C07C303/44

    Abstract: The invention relates to a method of reprocessing alkanesulfonic acid employed in a chemical process as an agent, catalyst or solvent and comprising the steps of: (a) removing an alkanesulfonic acid-comprising stream from a reaction mixture generated in the chemical process, (b) feeding the alkanesulfonic acid-comprising stream into a melt crystallization as the starting melt to form crystals of the alkanesulfonic acid, of hydrates of the alkanesulfonic acid or of a mixture of both suspended in mother liquor, (c) performing a solid-liquid separation to remove the crystals from the mother liquor, (d) optionally washing the crystals to remove mother liquor adhering to the crystals, (e) recycling the washed or unwashed crystals removed from the mother liquor into the chemical process.

    Method of producing biodiesel
    7.
    发明授权
    Method of producing biodiesel 有权

    公开(公告)号：US11591545B2

    公开(公告)日：2023-02-28

    申请号：US17284020

    申请日：2019-10-07

    Applicant: BASF SE

    Inventor： Paul Klingelhoefer ,  Michael Koch ,  Michael Schier ,  Juergen Schneider

    IPC: C11C3/02 ,  C07C67/08 ,  B01J31/02 ,  C07C67/03

    Abstract: The present invention relates to a method of producing fatty acid alkyl ester from an organic oil source containing at least one free fatty acid, wherein the oil source has an acid number of at least 30 mg KOH/g oil source and wherein the method comprises the steps of a) reacting the oil source with glycerol at a temperature, which does not exceed 180° C. during the reaction, in the presence of a catalyst comprising at least one alkyl or aryl sulfonic acid or an homoanhydride thereof; and b) transesterification of the reaction product from step a) with an alkanol; and c) isolating the fatty acid alkyl ester from the reaction product of step b).

    Process for purifying alkanesulfonic acids
    9.
    发明授权
    Process for purifying alkanesulfonic acids 有权

    公开(公告)号：US10577312B2

    公开(公告)日：2020-03-03

    申请号：US15774847

    申请日：2016-11-08

    Applicant: BASF SE

    Inventor： Jan Spielmann ,  Michael Koch ,  Juergen Wortmann ,  Feelly Ruether ,  Sabine Weiguny ,  Frieder Borgmeier

    IPC: C07C303/44 ,  C07C309/01 ,  C07C309/02 ,  C07C309/03 ,  B01D3/14 ,  B01D9/00 ,  B01D3/00

    Abstract: A process comprising: (a) distilling a melt comprising crude alkanesulfonic acid to completely or partly remove low boilers, wherein the low boilers are drawn off at the top of a distillation column or of a one-stage evaporation apparatus and a material stream comprising alkanesulfonic acid, high boilers and residual low boilers is withdrawn at the bottom of the distillation column or of the one-stage evaporation apparatus, (b) sending the stream comprising alkanesulfonic acid, high boilers and residual low boilers into a melt crystallization as the starting melt to obtain crystals formed from the alkanesulfonic acid, hydrates of the alkanesulfonic acid or a mixture of both suspended in mother liquor, (c) performing a solid-liquid separation to remove the crystals from the mother liquor, and (d) optionally washing the crystals to remove mother liquor adhering to the crystals.

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