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    Process for producing aliphatic diols
    4.
    发明授权
    Process for producing aliphatic diols 失效
    脂肪族二醇的制造方法

    公开(公告)号：US6037504A

    公开(公告)日：2000-03-14

    申请号：US204903

    申请日：1998-12-03

    申请人： Gerhard Darsow ,  Wolfgang Dummer ,  Wilfried Niemeier

    发明人： Gerhard Darsow ,  Wolfgang Dummer ,  Wilfried Niemeier

    IPC分类号： B01J23/86 ,  B01J23/88 ,  B01J23/889 ,  C07B61/00 ,  C07C29/149 ,  C07C31/20 ,  C07C67/08 ,  C07C29/14

    CPC分类号： C07C29/149 ,  B01J23/8892 ,  Y02P20/52

    摘要： In a process for producing aliphatic .alpha.,.omega.-diols comprising 4 to 12 C atoms from aliphatic .alpha.,.omega.-dicarboxylic acids comprising 4 to 12 C atoms, an oligoester of average chain length n=3 to n=4.5 and with an acid number of 40 to 60 mg KOH/g reaction mixture is first formed from a diol and a dicarboxylic acid, which oligoester is thereafter catalytically hydrogenated in the liquid phase. Hydrogenation is carried out continuously at 180 to 250.degree. C. and at an H.sub.2 pressure of 100 to 400 bar, over a pelletised catalyst which is free from Zn oxide and which comprises pressed powders of Cu, Mn and Al oxides with a content of at least one oxide of metals of subgroup VI of the periodic table of the elements (Mendeleev). The amount of H.sub.2 is 20 to 100 times the amount required stoichiometrically.

    摘要翻译： 在由4-12个碳原子的脂肪族α，ω-二羧酸组成的含有4-12个碳原子的脂肪族α，ω-二醇的制备方法中，平均链长n = 3〜n = 4.5，酸值为 40至60mg KOH / g反应混合物首先由二醇和二羧酸形成，然后将低聚酯在液相中催化氢化。 在180-250℃，在100-400巴的H 2压力下，在不含Zn氧化物的颗粒状催化剂上连续进行氢化，其包含Cu，Mn和Al氧化物的压制粉末，其含量为 元素周期表第VI族金属的最少一种金属（Mendeleev）。 H2的量为化学计量所需量的20-100倍。