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

2 Citations (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 publicationStudent Poster Session (General) - 226th ECS Meeting
EditorsV. R. Subramanian, C. S. Johnson, R. H. Lara-Castro, K. B. Sundaram, V. Chaitanya, P. Pharkya
PublisherElectrochemical Society Inc.
Pages91-97
Number of pages7
Edition45
ISBN (Electronic)9781607685395
DOIs
Publication statusPublished - 2014
EventSymposium on Student Poster General Session - 2014 ECS and SMEQ Joint International Meeting - Cancun, Mexico
Duration: 2014 Oct 52014 Oct 9

Publication series

NameECS Transactions
Number45
Volume64
ISSN (Print)1938-6737
ISSN (Electronic)1938-5862

Other

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

ASJC Scopus subject areas

  • Engineering(all)

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