echemi logo
Product
  • Product
  • Supplier
  • Inquiry
    Home > Chemicals Industry > China Chemical > Electrochemistry ushered in a new opportunity for ethylene oxide and propylene oxide!

    Electrochemistry ushered in a new opportunity for ethylene oxide and propylene oxide!

    • Last Update: 2022-02-26
    • Source: Internet
    • Author: User
    Search more information of high quality chemicals, good prices and reliable suppliers, visit www.echemi.com

    Recently, in the latest issue of Science, Leow et al.
    published the latest research results under the title "Chloride-mediated selective electrosynthesis of ethylene and propylene oxides at high current density" and proposed ethylene oxide (EO) and propylene oxide.
    The electrochemical route of (PO) realizes the characteristics of cleaner, more efficient and more selective synthesis process

    .

    In this research work, under industrial current density, ethylene and propylene can be electrochemically oxidized to ethylene oxide and propylene oxide, respectively, and the Faraday selection efficiency is about 70%
    .
    In response to this research, John L.
    Barton published an opinion article "Electrification of the chemical industry" in the same issue and commented on the work

    .

    Leow et al.
    combined the flow battery and the ethylene oxide synthesis reaction to achieve C2H2+H2O→C2H2O+H2 (see Figure 1)

    .
    Two electrochemical reactions drive this reaction.
    The precipitation of chlorine occurs at the anode 2Cl-→2e-+Cl2, and the precipitation of hydrogen occurs at the cathode 2H2O+2e-→H2+2OH-

    .
    These reactions are not particularly novel and interesting, but the innovation lies in the coupling of these two simple reactions with the subsequent three homogeneous chemical reactions

    .

    The dissolved chlorine in the anode solution is decomposed into hydrochloric acid and hypochlorous acid (HCl and HOCl, respectively)
    .
    The latter reacts with ethylene to produce 1-chloro-2-hydroxyethane (HOCH2CH2Cl), or ethylene chlorohydrin

    .
    The cathode solution is rich in hydroxides during the hydrogen precipitation process

    .
    When the anode aqueous ethylene chlorohydrin solution is mixed with the alkaline cathode solution, ethylene oxide and chloride ions are generated

    .
    A similar route can also be used to produce propylene oxide from propylene

    .

    The energy intensity can be reduced through battery design (for example, changing the flow rate or electrode thickness), but the pairing of electrochemical reactions (Cl2 and H2) is unlikely to reduce the energy intensity below the chlor-alkali process because it is proportional to the battery voltage
    .
    In order to significantly improve energy requirements, electrochemical processes need to be changed to reduce battery voltage

    .
    In addition to the analysis in this article, there are some more subtle advantages, such as reduced water consumption

    .

    Although Leow et al.
    reported that this particular process is unlikely to be the next main production route for ethylene oxide and propylene oxide, the development of production processes that replace commercial chemicals, especially the introduction of renewable energy, is more important to achieve.
    Green production is necessary

    .

    This article is an English version of an article which is originally in the Chinese language on echemi.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to service@echemi.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

    Contact Us

    The source of this page with content of products and services is from Internet, which doesn't represent ECHEMI's opinion. If you have any queries, please write to service@echemi.com. It will be replied within 5 days.

    Moreover, if you find any instances of plagiarism from the page, please send email to service@echemi.com with relevant evidence.