Hydrogenation of alpha-hydroxy ketones
    2.
    发明公开
    Hydrogenation of alpha-hydroxy ketones 失效
    氢化缬氨酸α-羟基 - 酮。

    公开(公告)号:EP0405956A1

    公开(公告)日:1991-01-02

    申请号:EP90307051.4

    申请日:1990-06-27

    IPC分类号: C07C29/136 C07C31/22

    摘要: This invention relates to a process for the catalytic hydrogenation of alpha-hydroxy ketones to the corresponding alcohol in a heterogeneous liquid phase reaction medium which contains a carboxylic acid. The carboxylic acid may be a simple carboxylic acid or a hydroxy carboxylic acid.
    The presence of the carboxylic acid improves both the yield of and selectivity to the alcohol product.

    摘要翻译: 本发明涉及在包含羧酸的非均相液相反应介质中将α-羟基酮催化氢化成相应的醇的方法。 羧酸可以是简单的羧酸或羟基羧酸。 羧酸的存在改善了醇产物的产率和选择性。

    Production of hydroxyketones
    4.
    发明公开
    Production of hydroxyketones 失效
    Herstellung von Hydroxyketonen。

    公开(公告)号:EP0480646A2

    公开(公告)日:1992-04-15

    申请号:EP91309136.9

    申请日:1991-10-04

    IPC分类号: C07C45/75 C07C49/17

    CPC分类号: C07C45/00 C07C49/17

    摘要: This invention relates to an improved process for the production of hydroxyketones, especially dihydroxyacetone, by the condensation of one or more aldehydes in the presence of a catalyst and the use of specific process train. The product of this process is a relatively pure and any waste products from the reaction are environmentally friendly because none of the chemical components are discharged into the waste streams.

    摘要翻译: 本发明涉及通过一种或多种醛在催化剂存在下缩合和使用特定工艺列车来制备羟基酮,特别是二羟基丙酮的改进方法。 该方法的产物是相对纯的,并且来自反应的任何废物都是环境友好的,因为没有一种化学成分被排放到废物流中。

    Synthesis of glycerol from formaldehyde
    8.
    发明公开
    Synthesis of glycerol from formaldehyde 失效
    甘油合成甲醛。

    公开(公告)号:EP0306215A2

    公开(公告)日:1989-03-08

    申请号:EP88307881.8

    申请日:1988-08-25

    摘要: This invention relates to a process for synthesis of glycerol from formaldehyde, wherein formaldehyde under substantially anhydrous condition is self-condensed in a catalytic step to dihydroxyacetone which is separated from the self-condensation catalyst and hydrogenated catalytically to glycerol.
    The feature of the invention is to have less than 0.4% w/w of water in the self-condensation reaction mixture thereby improving the process to produce glycerol in commercially viable rates and yields.

    摘要翻译: 本发明涉及从甲醛合成甘油的方法,其中在基本无水条件下的甲醛在催化步骤中自缩合成二羟基丙酮,其与自缩合催化剂分离并氢化为甘油。 本发明的特征是在自缩合反应混合物中具有小于0.4%w / w的水,从而改进以商业上可行的速率和产率生产甘油的方法。

    Process for the production of glycerol from formaldehyde
    9.
    发明公开
    Process for the production of glycerol from formaldehyde 失效
    Herstellungsverfahren von Glycerin aus Formaldehyd。

    公开(公告)号:EP0274226A1

    公开(公告)日:1988-07-13

    申请号:EP87310718.9

    申请日:1987-12-04

    IPC分类号: C07C31/22 C07C29/38

    CPC分类号: C07C29/38 C07C31/225

    摘要: A process for the production of glycerol from formaldehyde which process comprises reacting at elevated temperature formaldehyde in a liquid reaction medium with hydrogen in the presence of a catalyst system comprising as essential components (i) a thiazolium or imidazolium salt, (ii) a proton abstractor, and (iii) a compound or mixture containing (a) a rhodium or ruthenium moiety and optionally (b) a moiety of the formula XR₃ wherein X is either phosphorus, nitrogen arsenic or antimony and the groups R are independently either hydrogen or hydrocarbyl or substituted hydrocarbyl groups.

    摘要翻译: 一种用于从甲醛生产甘油的方法,该方法包括在升高的温度下将液体反应介质中的甲醛与氢气在催化剂体系的存在下反应,所述催化剂体系包含作为必需组分(i)噻唑鎓或咪唑鎓盐,(ii)质子提取器 ,和(iii)包含(a)铑或钌部分和任选(b)式XR 3的部分的化合物或混合物,其中X为磷,氮砷或锑,基团R独立地为氢或烃基或 取代的烃基。