Process for the epoxidation of olefins
    5.
    发明授权
    Process for the epoxidation of olefins 有权
    烯烃环氧化方法

    公开(公告)号:US06838572B2

    公开(公告)日:2005-01-04

    申请号:US10669993

    申请日:2003-09-24

    摘要: A continuous process for the epoxidation of olefins with hydrogen peroxide in the presence of a heterogeneous catalyst promoting the epoxidation reaction, whereby the aqueous reaction mixture contains i) an olefin; ii) hydrogen peroxide; iii) less than 100 wppm of alkali metals, earth alkali metals, both irrespective whether in ionic, complex or covalently bonded form, bases or cations of bases having a pkB of less than 4.5, or combinations thereof; and, iv) at least 100 wppm of bases or cations of bases having a pkB of at least 4.5 or combinations thereof, whereby the wppm are based on the total weight of hydrogen peroxide in the reaction mixture.

    摘要翻译: 在促进环氧化反应的多相催化剂的存在下用过氧化氢环氧化烯烃的连续方法,由此含水反应混合物含有i)烯烃; ii)过氧化氢; iii)小于100wppm的碱金属,碱土金属,无论是在离子,复合或共价键合的形式,碱性或pKB小于4.5的碱的阳离子,或其组合; 和iv)至少100wppm的pkB至少为4.5的碱或碱的阳离子或其组合,其中wppm是基于反应混合物中过氧化氢的总重量。

    Process for the epoxidation of olefins
    6.
    发明授权
    Process for the epoxidation of olefins 有权
    烯烃环氧化方法

    公开(公告)号:US07169945B2

    公开(公告)日:2007-01-30

    申请号:US10724300

    申请日:2003-11-26

    IPC分类号: C07D301/12

    CPC分类号: C07D301/12 Y02P20/584

    摘要: A process for the catalytic epoxidation of olefins in the presence of a titanium containing zeolite catalyst and a polar solvent whereby the deactivation of the catalyst upon recycling of the solvent has been considerably reduced. In the process one or more nitrogen containing compounds are introduced at some stage, a solvent stream is recovered, treated to contain less than 50 wppm nitrogen in the form of organic nitrogen compounds and at least a part of it is recycled to the epoxidation step. Also disclosed is a process for the catalytic epoxidation of propene which integrates the treatment and recycle of the solvent into the workup of the reaction mixture.

    摘要翻译: 一种在含钛沸石催化剂和极性溶剂的存在下烯烃的催化环氧化方法,从而显着减少了在溶剂再循环时催化剂失活。 在该过程中,在一些阶段引入一种或多种含氮化合物,回收溶剂流,将其处理为含有少于50wppm氮的有机氮化合物形式,并将其至少一部分再循环至环氧化步骤。 还公开了丙烯的催化环氧化方法,其将溶剂的处理和再循环整合到反应混合物的后处理中。

    Process for the production of amines from imines of nitriles
    7.
    发明授权
    Process for the production of amines from imines of nitriles 有权
    从腈亚胺生产胺的方法

    公开(公告)号:US6011179A

    公开(公告)日:2000-01-04

    申请号:US182196

    申请日:1998-10-30

    摘要: A process for the production of primary and/or secondary amines from imines or nitriles, comprising an aminating hydrogenation of imine or of nitrile with hydrogen in the presence of ammonia, of a hydrogenation catalyst based on cobalt, nickel, ruthenium or mixtures of these metals and of a base, at a temperature within the range of 50.degree. C. to 200.degree. C. and at a pressure within the range of 0.3 to 30 MPa. The yield of amine is increased by the use of a quaternary ammonium hydroxide as base. Preferably a tetraalkylammonium hydroxide is used in a quantity of from 0.01 to 100 mMol per mol of amine or of nitrile. The process is suitable in particular for the production of isophoronediamine from isophorone nitrile imine.

    摘要翻译: 一种由亚胺或腈生产伯胺和/或仲胺的方法,包括在氨存在下亚胺或腈与氢的氨化氢化,基于钴,镍,钌的氢化催化剂或这些金属的混合物 在50〜200℃的范围内,压力为0.3〜30MPa的范围内进行。 通过使用季铵氢氧化物作为碱来增加胺的产率。 优选氢氧化四烷基铵的用量为每摩尔胺或腈的0.01至100mMol。 该方法特别适用于从异佛尔酮腈亚胺生产异佛尔酮二胺。

    Process for recovering methanol
    10.
    发明申请
    Process for recovering methanol 有权
    回收甲醇的方法

    公开(公告)号:US20060135826A1

    公开(公告)日:2006-06-22

    申请号:US11312237

    申请日:2005-12-19

    IPC分类号: C07C29/74

    摘要: A process for recovering methanol from mixtures containing methanol and water, comprising multistage evaporation with heat integration, wherein the pressure is reduced from each stage to the next, and a downstream series of distillation stages with heat integration, wherein the pressure is increased from each stage to the next. The process reduces the amount of energy required for methanol recovery.

    摘要翻译: 一种从含有甲醇和水的混合物中回收甲醇的方法,包括具有热积分的多级蒸发,其中压力从每个阶段下降到下一个阶段,以及下游一系列具有热积分的蒸馏阶段,其中压力从每个阶段增加 到下一个。 该方法减少甲醇回收所需的能量。