Method for Improving a Piperazine Colour Stability
    1.
    发明申请
    Method for Improving a Piperazine Colour Stability 有权
    改善哌嗪颜色稳定性的方法

    公开(公告)号:US20070295592A1

    公开(公告)日:2007-12-27

    申请号:US11659531

    申请日:2005-08-03

    IPC分类号: C07D295/023

    CPC分类号: C07D295/02 Y10S203/20

    摘要: The present invention relates to a process for improving the color stability by postpurifying piperazine, the steps comprising preparing an aqueous piperazine solution by introducing solid or liquid piperazine having a degree of purity of at least 90% by weight in water; removing the water by distillation; isolating the piperazine with a predefined maximum residual content of water. The invention further provides a rapid test of aging for checking the improvement in the color stability.

    摘要翻译: 本发明涉及通过将哌嗪后期纯化来改善颜色稳定性的方法,包括通过在水中引入纯度至少为90重量%的固体或液体哌嗪来制备哌嗪水溶液的步骤; 通过蒸馏除去水分; 用预定的最大残留含量的水分离哌嗪。 本发明进一步提供了用于检验颜色稳定性改进的老化的快速测试。

    Method for improving a piperazine colour stability
    2.
    发明授权
    Method for improving a piperazine colour stability 有权
    改善哌嗪颜色稳定性的方法

    公开(公告)号:US07758730B2

    公开(公告)日:2010-07-20

    申请号:US11659531

    申请日:2005-08-03

    IPC分类号: B01D3/42 C07D295/023

    CPC分类号: C07D295/02 Y10S203/20

    摘要: The present invention relates to a process for improving the color stability by postpurifying piperazine, the steps comprising preparing an aqueous piperazine solution by introducing solid or liquid piperazine having a degree of purity of at least 90% by weight in water; removing the water by distillation; isolating the piperazine with a predefined maximum residual content of water. The invention further provides a rapid test of aging for checking the improvement in the color stability.

    摘要翻译: 本发明涉及通过将哌嗪后期纯化来改善颜色稳定性的方法,包括通过在水中引入纯度至少为90重量%的固体或液体哌嗪来制备哌嗪水溶液的步骤; 通过蒸馏除去水分; 用预定的最大残留含量的水分离哌嗪。 本发明进一步提供了用于检验颜色稳定性改进的老化的快速测试。

    Process for producing ethyleneamines
    3.
    发明授权
    Process for producing ethyleneamines 有权
    制备亚乙基胺的方法

    公开(公告)号:US07696384B2

    公开(公告)日:2010-04-13

    申请号:US12088715

    申请日:2006-09-25

    IPC分类号: C07C211/00

    摘要: Processes comprising: providing a starting material comprising monoethanolamine; and reacting the starting material with ammonia in the presence of a heterogeneous transition metal catalyst to form a reaction product comprising one or more ethylene amines; wherein the catalyst comprises a catalytically active composition, which prior to treatment with hydrogen, comprises a mixture of oxygen-containing compounds of aluminum, copper, nickel and cobalt; and wherein the catalyst is present as one or more shaped catalyst particles selected from spheres, extrudates, pellets and other geometries, wherein the sphere or extrudate has a diameter of

    摘要翻译: 方法包括:提供包含单乙醇胺的原料; 并在非均相过渡金属催化剂的存在下使原料与氨反应形成包含一种或多种亚乙基胺的反应产物; 其中所述催化剂包含催化活性组合物,其在用氢处理之前包括铝,铜,镍和钴的含氧化合物的混合物; 并且其中所述催化剂作为选自球体,挤出物,丸粒和其它几何形状的一种或多种成型催化剂颗粒存在,其中所述球体或挤出物的直径<3mm,所述颗粒具有<3mm的高度,而另一种 几何形状具有等效直径L = 1 / a'<0.70mm,其中a'是每单位体积的外表面积(mms2 / mmp3),由'= A p V p定义,其中Ap是外表面积 的催化剂颗粒(mms2),Vp是催化剂颗粒的体积(mmp3)。