Process for the epoxidation of olefins
    1.
    发明授权
    Process for the epoxidation of olefins 有权
    烯烃环氧化方法

    公开(公告)号:US06720436B2

    公开(公告)日:2004-04-13

    申请号:US10384217

    申请日:2003-03-07

    IPC分类号: C07D30112

    CPC分类号: C07D301/12

    摘要: A process for the catalytic epoxidation of olefins in at least one reaction stage comprising: (a) reacting the olefin with hydrogen peroxide in an organic, water-miscible solvent in the presence of a titanium silicalite catalyst in a reactor while continuously feeding an inert gas stream into the reactor, (b) continuously removing an exit gas stream containing olefin oxide, unreacted olefin, oxygen and inert gas from the reactor, (c) bringing the exit gas stream into contact in an absorption unit with the same solvent as used in the reaction stage, (d) removing a solvent stream loaded with olefin and olefin oxide from the absorption unit and (e) discharging an gas stream containing oxygen and the inert gas from the absorption unit.

    摘要翻译: 一种用于在至少一个反应阶段中对烯烃进行催化环氧化的方法,包括:(a)在反应器中在钛硅沸石催化剂存在下,使烯烃与有机的水混溶性溶剂中的过氧化氢反应,同时连续进料惰性气体 (b)从反应器中连续除去含有烯烃氧化物,未反应的烯烃,氧和惰性气体的出口气流,(c)使出口气流与吸收单元中的相同溶剂接触, 反应阶段,(d)从吸收单元除去负载有烯烃和烯烃氧化物的溶剂流,和(e)从吸收单元排出含有氧和惰性气体的气流。

    Rectifying column for extractive distillation of close-boiling or azeotropic boiling mixtures
    2.
    发明授权
    Rectifying column for extractive distillation of close-boiling or azeotropic boiling mixtures 有权
    精馏塔用于近沸或共沸混合物的萃取蒸馏

    公开(公告)号:US06514387B1

    公开(公告)日:2003-02-04

    申请号:US09582596

    申请日:2000-08-01

    IPC分类号: B01D336

    CPC分类号: B01D3/141 B01D3/40 Y10S203/09

    摘要: The invention relates to a rectifying column for extractive distillation, comprising a column main section (204) and a raffinate section (205) above said main section, an evaporator (208) situated on the lower end of the column, an inlet (214) disposed between the main section of the column and the raffinate section and a solvent inlet (215) arranged on the top side of the raffinate section (205) for feeding an extracting agent. According to the invention, the main section (204) has two chambers (216, 217) connected in parallel. A stripping section (222) is disposed between the bottom of the column (221) and the main section (204), in which concentration of the extracting agent occurs from the top down. The bottom (221) is connected to the solvent inflow (215) by a device (223) for recycling the extracting agent.

    摘要翻译: 本发明涉及一种用于萃取蒸馏的精馏塔,包括柱主体部分(204)和位于所述主部分上方的提余部分(205),位于塔的下端的蒸发器(208),入口(214) 设置在所述塔的主要部分和所述提余部分之间,以及布置在所述提余部分(205)的顶侧上的用于进料提取剂的溶剂入口(215)。 根据本发明,主部分(204)具有并联连接的两个室(216,217)。 汽提段(222)设置在塔(221)的底部和主区段(204)之间,其中提取剂的浓度从上到下发生。 底部(221)通过用于再循环提取剂的装置(223)连接到溶剂流入物(215)。

    Process for recovering methanol
    3.
    发明授权
    Process for recovering methanol 有权
    回收甲醇的方法

    公开(公告)号:US07157610B2

    公开(公告)日:2007-01-02

    申请号:US11312237

    申请日:2005-12-19

    IPC分类号: C07C29/80 C07C29/82 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降低到下一个阶段,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。