Elimination of boron from soluble silica via solvent extraction with 2,2,4-trimethyl-1,3-pentanediol using a multistage flow-type reactor

Nobufumi Matsuo, Takafumi Ishihara, Takahiro Oyanagi, Kazuki Nakajima, Masahiro Kunimoto, Yasuhiro Fukunaka, Takayuki Homma

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Citation (Scopus)

    Abstract

    Elimination of boron species via solvent extraction with 2,2,4-trimethyl-1,3-pentandiaol was engaged in a flow-type device into which the aqueous solution dissolving diatomaceous earth, a -candidate of the resource for high-purity silicon material. The flow-type device has a 2-stage channel with 1.0 mm width, 0.10 mm depth, and 25 mm length each, and the specific interfacial area is comparable to a typical microchannel device. Residual boron content in the aqueous solution decreased to less than 0.1 ppm after the solvent extraction under the restriction of short contact duration shorter than 100 ms. In addition, the analysis with density functional theory indicated that the number of neighbor carbon on the central carbon is one of the keys for improvement of reactivity of extractant. Hence, it is suggested that the flow-type microchannel device with solvent extraction with alkyldiol extractant can be utilized as an attractive approach toward the production of high-purity silica as a source for solar-grade silicon.

    Original languageEnglish
    Title of host publicationECS Transactions
    PublisherElectrochemical Society Inc.
    Pages91-97
    Number of pages7
    Volume64
    Edition45
    ISBN (Print)9781607685395
    DOIs
    Publication statusPublished - 2015
    EventSymposium on Student Poster General Session - 2014 ECS and SMEQ Joint International Meeting - Cancun, Mexico
    Duration: 2014 Oct 52014 Oct 9

    Other

    OtherSymposium on Student Poster General Session - 2014 ECS and SMEQ Joint International Meeting
    CountryMexico
    CityCancun
    Period14/10/514/10/9

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    ASJC Scopus subject areas

    • Engineering(all)

    Cite this

    Matsuo, N., Ishihara, T., Oyanagi, T., Nakajima, K., Kunimoto, M., Fukunaka, Y., & Homma, T. (2015). Elimination of boron from soluble silica via solvent extraction with 2,2,4-trimethyl-1,3-pentanediol using a multistage flow-type reactor. In ECS Transactions (45 ed., Vol. 64, pp. 91-97). Electrochemical Society Inc.. https://doi.org/10.1149/06445.0091ecst