Process for preparing optically active biophosphinylalkanes
    1.
    发明授权
    Process for preparing optically active biophosphinylalkanes 有权
    制备光学活性生物磷烷基烷烃的方法

    公开(公告)号:US09469662B2

    公开(公告)日:2016-10-18

    申请号:US11997027

    申请日:2006-07-26

    IPC分类号: C07F9/50

    CPC分类号: C07F9/5027 Y02P20/582

    摘要: The present invention relates to a process for preparing optically active bisphosphinylalkanes from the correspondingly substituted, racemic 1,2-diols. The optically active bisphosphinylalkanes which can be obtained in this way are suitable as ligands for preparing chiral transition metal catalysts.

    摘要翻译: 本发明涉及从相应取代的外消旋1,2-二醇制备光学活性双膦酰基烷烃的方法。 以这种方式获得的光学活性双膦基烷烃适合用作制备手性过渡金属催化剂的配体。

    Process for the Preparation of Formic Acid
    4.
    发明申请
    Process for the Preparation of Formic Acid 有权
    制备甲酸的方法

    公开(公告)号:US20110319657A1

    公开(公告)日:2011-12-29

    申请号:US13171598

    申请日:2011-06-29

    IPC分类号: C07C53/02

    CPC分类号: C07C51/09 C07C51/44 C07C53/02

    摘要: Process for obtaining formic acid by thermal separation of a stream comprising formic acid and a tertiary amine (I), in which a liquid stream comprising formic acid and a tertiary amine (I) in a molar ratio of from 0.5 to 5 is produced by combining tertiary amine (I) and a formic acid source, from 10 to 100% by weight of the secondary components present therein are separated off and formic acid is removed by distillation in a distillation apparatus at a bottom temperature of from 100 to 300° C. and a pressure of from 30 to 3000 hPa abs from the liquid stream obtained, the bottom discharge from the distillation apparatus being separated into two liquid phases and the upper liquid phase being recycled to the formic acid source and the lower liquid phase being recycled for separating off the secondary components and/or to the distillation apparatus.

    摘要翻译: 通过热分离包含甲酸和叔胺(I)的流来获得甲酸的方法,其中包含摩尔比为0.5至5的甲酸和叔胺(I)的液体流通过组合 分离叔胺(I)和甲酸源,10至100重量%存在于其中的次要组分,并在蒸馏装置中在100-300℃的底部温度下蒸馏除去甲酸。 从得到的液体流中的压力为30〜3000hPa abs,将来自蒸馏装置的底部排出物分离成两液相,将上液相再循环至甲酸源,将下液相回收分离 脱离第二组分和/或蒸馏装置。