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    Process for the continuous manufacture of n-butyraldehyde by selective hydrogenation of crotonaldehyde in the liquid phase in the presence of a palladium-aluminum oxide catalyst
    1.
    发明授权
    Process for the continuous manufacture of n-butyraldehyde by selective hydrogenation of crotonaldehyde in the liquid phase in the presence of a palladium-aluminum oxide catalyst 失效
    在钯 - 氧化铝催化剂存在下，通过液相中巴豆醛的选择性氢化连续制造正丁醛的方法

    公开(公告)号：US4450300A

    公开(公告)日：1984-05-22

    申请号：US357451

    申请日：1982-03-12

    Applicant: Lothar Fischer ,  Manfred Z. Hausen ,  Kurt Wember

    Inventor： Lothar Fischer ,  Manfred Z. Hausen ,  Kurt Wember

    IPC: B01J23/44 ,  B01J35/10 ,  C07C45/62

    CPC classification number: B01J35/10 ,  B01J23/44 ,  C07C45/62 ,  B01J35/008 ,  B01J35/1019 ,  B01J35/1038 ,  B01J35/1061

    Abstract: For the continuous manufacture of n-butyraldehyde by selective hydrogenation of crotonaldehyde, the hydrogenation is conducted in the liquid phase in the presence of a palladium-aluminum oxide supported catalyst containing the palladium in the outer layer of the supporting grain of a thickness of 0.05-0.2 mm. The palladium content of this catalyst is 0.1-0.6% by weight. The aluminum oxide support, with a specific pore volume of 0.4-0.6 cm.sup.3 /g, has 40-60% of its pores of a diameter of >0.5 nm and an internal surface area of 130-160 m.sup.2 /g. The hydrogenation is conducted under absolute pressures of 5-50 bar and at temperatures of 20.degree.-100.degree. C. The resultant n-butyraldehyde is of a high purity without interfering by-products.

    Abstract translation: 为了通过巴豆​​醛的选择性氢化连续制造正丁醛，在含有负载粒子的外层中含有钯的钯 - 氧化铝负载催化剂存在下，在液相中进行氢化，厚度为0.05- 0.2毫米。 该催化剂的钯含量为0.1-0.6重量％。 具有0.4-0.6cm 3 / g的比孔体积的氧化铝载体具有直径> 0.5nm的孔的40-60％，内表面积为130-160m 2 / g。 氢化在绝对压力为5-50巴，温度为20°-100℃的条件下进行。所得正丁醛的纯度高，无干扰副产物。

    Method for preparation of dimethyl terephthalate
    2.
    发明授权
    Method for preparation of dimethyl terephthalate 失效
    对苯二甲酸二甲酯的制备方法

    公开(公告)号：US4009199A

    公开(公告)日：1977-02-22

    申请号：US588836

    申请日：1975-06-20

    Applicant: Ferdinand List ,  Kurt Wember

    Inventor： Ferdinand List ,  Kurt Wember

    IPC: B01J21/08 ,  B01J21/12 ,  B01J23/06 ,  B01J23/14 ,  B01J37/14 ,  C07C69/82

    CPC classification number: B01J23/06 ,  B01J21/08 ,  B01J21/12 ,  B01J23/14 ,  B01J37/14

    Abstract: Silica gel esterification catalysts which are mechanically stable and are highly abrasion free, particularly suitable for the esterification of dimethyl terephthalate, are prepared by impregnating silica gel in solutions of aluminum, titanium, zinc and tin compounds, separating the excess solutions and drying at elevated temperatures. The catalysts are further improved by treatment with a gaseous mixture of methanol and water.

    Abstract translation: 通过将硅胶浸渍在铝，钛，锌和锡化合物的溶液中，分离过量溶液并在高温下干燥来制备机械稳定且高度无磨损，特别适用于对苯二甲酸二甲酯酯化的硅胶酯化催化剂 。 通过用甲醇和水的气体混合物处理进一步改进催化剂。

    Process for recovering the mother liquor produced by the esterification of terephthalic acid with methanol
    4.
    发明授权
    Process for recovering the mother liquor produced by the esterification of terephthalic acid with methanol 失效
    回收由对苯二甲酸与甲醇酯化产生的母液的方法

    公开(公告)号：US4005124A

    公开(公告)日：1977-01-25

    申请号：US525516

    申请日：1974-11-20

    Applicant: Ferdinand List ,  Wilfried Uhlenbrock ,  Norbert Wilke ,  Kurt Wember

    Inventor： Ferdinand List ,  Wilfried Uhlenbrock ,  Norbert Wilke ,  Kurt Wember

    IPC: C07C69/82 ,  C07C29/80 ,  C07C51/265 ,  C07C67/48

    CPC classification number: C07C29/80 ,  C07C51/265 ,  C07C67/08 ,  C07C67/56

    Abstract: The process of recovering methanolic mother liquor obtained by the esterification of terephthalic acid with methanol, where the terephthalic acid may be unprepurified, is improved by adjusting to a specific gravity of about 0.85 - 0.98 by addition of water and/or methanol distillate, a mother liquor containing esterification water and dissolved solids at a concentration of about 1.0 to 6.0 percent by weight and cooling the mother liquor from a temperature of about 65.degree. - 85.degree. C to a temperature of about 10.degree. - 30.degree. C to separate the solids and remove the separated solids. The separated solids may be recycled into the esterification reaction and the unseparated solids may be recycled for oxidation to terephthalic acid following distillation to remove the methanol.

    Abstract translation: 通过加入水和/或甲醇馏出物，通过调节约0.85-0.98的比重来改善通过对苯二甲酸与甲醇酯化反应得到的甲醇母液（对苯二甲酸可能未经修复的方法）的方法，母体 含有酯化水和溶解固体的液体浓度为约1.0至6.0重量％，并将母液从约65-85℃的温度冷却至约10-30℃的温度，以分离固体和 去除分离的固体。 分离的固体可以再循环到酯化反应中，并且未分离的固体可以在蒸馏之后再循环以氧化成对苯二甲酸以除去甲醇。

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