Method for producing glycols from oxirane compound
    2.
    发明授权
    Method for producing glycols from oxirane compound 有权
    由环氧乙烷化合物生产二醇的方法

    公开(公告)号:US09233900B2

    公开(公告)日:2016-01-12

    申请号:US14399567

    申请日:2013-05-10

    摘要: There is provided a method for producing dipropylene glycol (DPG) and/or tripropylene glycol (TPG) including: (A) reacting a raw material liquid including propylene oxide and water to obtain a reaction liquid including unreacted water, propylene glycol (PG), DPG and/or TPG, and an alcohol compound excluding PG, DPG, and TPG; (B) separating, from the reaction liquid, a first liquid containing water and the alcohol compound and a second liquid containing the PG, DPG and/or TPG and optionally the alcohol compound; (C) removing a part of the alcohol compound from the first liquid to obtain a third liquid containing water and optionally a part of the alcohol compound; (D) separating, from the second liquid, a fourth liquid containing the PG and optionally the alcohol compound, and a fifth liquid containing the DPG and/or TPG and optionally the alcohol compound; and (E) recycling a part of the third liquid to step (A).

    摘要翻译: 提供了制备二丙二醇(DPG)和/或三丙二醇(TPG)的方法,包括:(A)使包含环氧丙烷和水的原料液体反应,得到包含未反应水,丙二醇(PG), DPG和/或TPG,以及不包括PG,DPG和TPG的醇化合物; (B)从反应液中分离含有水和醇化合物的第一液体和含有PG,DPG和/或TPG以及任选的醇化合物的第二液体; (C)从第一液体中除去一部分醇化合物,得到含有水和任意一部分醇化合物的第三液体; (D)从第二液体中分离含有PG和任选的醇化合物的第四液体和含有DPG和/或TPG和任选的醇化合物的第五液体; 和(E)将第三液体的一部分再循环到步骤(A)。

    Processes for the production of ethylene glycol
    4.
    发明授权
    Processes for the production of ethylene glycol 有权
    生产乙二醇的方法

    公开(公告)号:US09096564B2

    公开(公告)日:2015-08-04

    申请号:US13362835

    申请日:2012-01-31

    摘要: A process for the production of ethylene glycol comprising: (i) supplying ethylene and oxygen and an organic chloride moderator to an EO reactor, thereby producing a reactor product stream; (ii) supplying the reactor product stream to an EO absorber, thereby producing a fat absorbent stream; (iii) supplying the fat absorbent stream to an EO stripper, thereby producing a concentrated ethylene oxide stream and a lean absorbent stream; (iv) recirculating the lean absorbent stream to the EO absorber; and (v) supplying the ethylene oxide stream and/or the ethylene carbonate stream to hydrolysis reactors with an alkali metal salt hydrolysis catalyst to form an ethylene glycol stream; wherein the process additionally comprises: (vi) removing a glycol bleed stream from the ethylene oxide stripper; and (vii) adding a base to the ethylene oxide stripper such that the pH in the bottom section of the stripper is maintained from 9.5 to 12.0.

    摘要翻译: 一种生产乙二醇的方法,包括:(i)向EO反应器供应乙烯和氧气和有机氯化物慢化剂,从而产生反应器产物流; (ii)将反应器产物流供应到EO吸收剂,从而产生吸收脂肪的物流; (iii)将脂肪吸收剂流供应到EO汽提器,从而产生浓缩的环氧乙烷流和贫吸收物流; (iv)将贫吸收物流再循环到EO吸收器; 和(v)用碱金属盐水解催化剂将环氧乙烷物流和/或碳酸亚乙酯物流供应至水解反应器以形成乙二醇物流; 其中所述方法还包括:(vi)从所述环氧乙烷剥离剂中除去二醇流出物; 和(vii)向环氧乙烷汽提器中加入碱,使得汽提塔底部的pH保持在9.5至12.0。