Process for decolorizing aromatic dicarboxylic acids
    23.
    发明授权
    Process for decolorizing aromatic dicarboxylic acids 失效
    芳族二羧酸脱色方法

    公开(公告)号:US07164038B1

    公开(公告)日:2007-01-16

    申请号:US11353815

    申请日:2006-02-14

    申请人: Zhufang Liu

    发明人: Zhufang Liu

    IPC分类号: C07C51/42

    摘要: In a process for reducing the visible color of a crude aromatic dicarboxylic acid containing colored contaminants, an aqueous ammonia solution of the crude aromatic dicarboxylic acid is prepared and contacted with hydrogen in a reactor in the presence of a heterogeneous metal-containing catalyst that includes a noble metal and a support. The process is carried out under conditions of temperature, pressure, and contact time effective to reduce the visible color of the aromatic dicarboxylic acid.

    摘要翻译: 在减少含有着色污染物的粗芳族二羧酸的可见颜色的方法中,制备粗芳族二羧酸的氨水溶液并在反应器中与含氢异氰酸的催化剂存在下与氢接触,所述催化剂包括 贵金属和支持。 该方法在有效降低芳族二羧酸的可见颜色的温度,压力和接触时间的条件下进行。

    Process for the preparation of 2,2,4,4-tetraalkylcyclobutane-1,3-diols
    25.
    发明授权
    Process for the preparation of 2,2,4,4-tetraalkylcyclobutane-1,3-diols 有权
    制备2,2,4,4-四烷基环丁烷-1,3-二醇的方法

    公开(公告)号:US08420869B2

    公开(公告)日:2013-04-16

    申请号:US12963698

    申请日:2010-12-09

    IPC分类号: C07C29/145 C07C35/04

    摘要: Disclosed is a process for the preparation of a 2,2,4,4-tetraalkylcyclobutane-1,3-diol by hydrogenation of the corresponding 2,2,4,4-tetraalkylcyclobutane-1,3-dione in the vapor phase in the presence of a supported catalyst. The process is useful for the preparation of 2,2,4,4-tetramethylcyclobutane-1,3-diol from 2,2,4,4-tetramethylcyclobutane-1,3-dione. The process can produce a 2,2,4,4-tetraalkylcyclobutane-1,3-diol product having a cis:trans isomer ratio of 1:1 or greater.

    摘要翻译: 公开了一种通过在气相中氢化相应的2,2,4,4-四烷基环丁烷-1,3-二酮来制备2,2,4,4-四烷基环丁烷-1,3-二醇的方法 载体催化剂的存在。 该方法可用于从2,2,4,4-四甲基环丁烷-1,3-二酮制备2,2,4,4-四甲基环丁烷-1,3-二醇。 该方法可以制备具有1:1:1或更大的顺式:反式异构体比例的2,2,4,4-四烷基环丁烷-1,3-二醇产物。

    PROCESS FOR THE PREPARATION OF 2,2,4,4-TETRAALKYLCYCLOBUTANE-1,3-DIOLS
    26.
    发明申请
    PROCESS FOR THE PREPARATION OF 2,2,4,4-TETRAALKYLCYCLOBUTANE-1,3-DIOLS 有权
    制备2,2,4,4-四烯丙基-1,3-丁二醇的方法

    公开(公告)号:US20120149946A1

    公开(公告)日:2012-06-14

    申请号:US12963691

    申请日:2010-12-09

    IPC分类号: C07C35/04

    摘要: Disclosed is a process for the preparation of a 2,2,4,4-tetraalkylcyclobutane-1,3-diols by hydrogenation of a 2,2,4,4-tetraalkylcyclobutane-1,3-dione in the presence of a catalyst comprising ruthenium deposited on a carbon nanotube support. The process is useful for the preparation of 2,2,4,4-tetramethylcyclobutane-1,3-diol. The process may be carried out in the presence or absence of a solvent and in the liquid or vapor phase. Also disclosed is a process for modifying the cis:trans ratio of the 2,2,4,4-tetramethylcyclo-butane-1,3-diol hydrogenation product by contacting the diol with hydrogen in the presence of a supported ruthenium catalyst.

    摘要翻译: 公开了一种在催化剂存在下,通过2,2,4,4-四烷基环丁烷-1,3-二酮的氢化制备2,2,4,4-四烷基环丁烷-1,3-二醇的方法,包括 钌沉积在碳纳米管支撑体上。 该方法可用于制备2,2,4,4-四甲基环丁烷-1,3-二醇。 该方法可以在溶剂存在或不存在下和在液相或气相中进行。 还公开了通过在负载的钌催化剂的存在下使二醇与氢接触来改性2,2,4,4-四甲基环丁烷-1,3-二醇氢化产物​​的顺式:反式比的方法。

    Hydrogenation process and catalysts
    28.
    发明授权
    Hydrogenation process and catalysts 失效
    氢化工艺和催化剂

    公开(公告)号:US07632962B2

    公开(公告)日:2009-12-15

    申请号:US11787496

    申请日:2007-04-17

    申请人: Zhufang Liu

    发明人: Zhufang Liu

    IPC分类号: C07C69/74

    摘要: Disclosed is a process for the preparation of dimethyl cyclohexanedicarboxylates by the hydrogenation of the corresponding dimethyl benzenedicarboxylate ester in the presence of supported catalysts comprising (i) a Group VIII metal and (ii) a catalyst support material selected from graphite and silicon carbide.

    摘要翻译: 公开了通过在负载催化剂的氢化下相应的二苯基二羧酸酯的制备来制备环己烷二羧酸二甲酯的方法,所述载体催化剂包含(ⅰ)第Ⅷ族金属和(ⅱ)选自石墨和碳化硅的催化剂载体材料。