Process for fractionating water-containing crude amine mixtures from amine synthesis
    12.
    发明授权
    Process for fractionating water-containing crude amine mixtures from amine synthesis 失效
    从胺合成分馏含水粗胺混合物的方法

    公开(公告)号:US06821396B2

    公开(公告)日:2004-11-23

    申请号:US10272012

    申请日:2002-10-17

    IPC分类号: B01D314

    摘要: A mixture containing mixture one or more amines, water, low-boilers and high-boilers, is fractioned in a process wherein (i) low-boilers are separated from the mixture by distillation, (ii) high-boilers are separated from the mixture by distillation, (iii) the mixture is extracted with a sodium hydroxide solution to form an aqueous, sodium-hydroxide-containing first phase and an aqueous-organic, amine-containing second phase, and (iv) the aqueous-organic second phase is distilled to form an amine/water azeotrope and an essentially anhydrous amine, and the amine/water azeotrope is recycled to the extraction step (iii).

    摘要翻译: 将混合物中含有一种或多种胺,水,低锅炉和高锅炉的混合物在一个方法中进行分馏,其中(i)通过蒸馏将低沸点物与混合物分离,(ii)从混合物中分离出高锅炉 通过蒸馏,(iii)混合物用氢氧化钠溶液萃取以形成含氢氧化钠的第一相和含水有机胺的第二相,和(iv)含水有机相第二相为 蒸馏以形成胺/水共沸物和基本上无水的胺,并将胺/水共沸物再循环至提取步骤(iii)。

    Catalyst and method for the production of polytetrahydrofuran
    14.
    发明授权
    Catalyst and method for the production of polytetrahydrofuran 失效
    用于生产聚四氢呋喃的催化剂和方法

    公开(公告)号:US06362312B1

    公开(公告)日:2002-03-26

    申请号:US09529180

    申请日:2000-04-10

    IPC分类号: C07C4311

    摘要: In a process for preparing polytetrahydrofuran, polytetrahydrofuran copolymers or diesters or monoesters thereof comprises polymerizing tetrahydrofuran in the presence of at least one telogen and/or comonomer over an acid-activated calcium montmorillonite as catalyst, the calcium montmorillonite has a BET surface area of at least 300 m2/g, an acidity of at least 0.02 mmol/g at pKa

    摘要翻译: 在制备聚四氢呋喃的方法中,聚四氢呋喃共聚物或二酯或其单酯包括在至少一种前体和/或共聚单体存在下,在酸活化的钙蒙脱石作为催化剂上聚合四氢呋喃,所述钙蒙脱石的BET表面积至少为 300m 2 / g,在pKa <3时酸度至少为0.02mmol / g,孔径在30至200之间的孔体积至少为0.40cm 3 / g。

    Method for producing polytetrahydrofuran with low color index
    15.
    发明授权
    Method for producing polytetrahydrofuran with low color index 失效
    低颜色指数聚四氢呋喃的制备方法

    公开(公告)号:US06197979B1

    公开(公告)日:2001-03-06

    申请号:US09485459

    申请日:2000-02-10

    IPC分类号: C07D30793

    CPC分类号: C08G65/20 B01J23/24

    摘要: In a process for preparing polytetrahydrofuran, tetrahydrofuran copolymers, diesters or monoesters of these polymers having a low color number by polymerization of tetrahydrofuran in the presence of at least one telogen and/or comonomer over a heterogeneous catalyst, the polymerization is carried out in the presence of hydrogen.

    摘要翻译: 在通过在非均相催化剂的存在下,在至少一种环糊精和/或共聚单体的存在下通过四氢呋喃聚合而制备聚四氢呋喃的这些聚合物的四氢呋喃共聚物,二酯或单酯具有低色数的聚合反应在存在下进行 的氢。