Production of silica and calcium carbonate particles from silicate minerals for ink jet paper coating and filler purposes

Sebastian Teir, John Kettle, Ali Harlin, Juha Sarlin

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    Abstract

    In this work, the possibility to produce silica and calcium carbonate particles of nanoscopic scale is studied. The work focuses on processes that can use magnesium- and calcium silicate minerals, such as serpentine, olivine and wollastonite, as raw materials. Experimental research has been initiated studying two different main routes: one using pressurised CO2 as a solvent and another one using strongly acidic solvents. The developed material is to be used as the top coating layer of high quality inkjet papers for high speed printing. The technical concept is to replace the expensive, relatively thick top coating layer of multiple coated premium inkjet paper with a thin top coating of nano silica particles applied directly onto the paper printing surface using either a foam or curtain coating technique. Although our ongoing experimental work has shown that wollastonite can be partially carbonated already at 10 bar total pressure, strongly acidic solvents seem far more favourable for mobilising the silica and allowing the production of pure materials. So far, our experiments have yielded >99 % pure calcite and vaterite particles with crystal sizes in the range of 50 nm to 5 ?m. Pure amorphous silica particles have also been produced with diameters in the range of tens of micrometers, but more work is required to reduce the particle size.
    Original languageEnglish
    Title of host publication3th International Conference on accelerated carbonation for environmental and materials engineering
    Place of PublicationTurku
    PublisherÅbo Akademi
    Pages63-74
    ISBN (Electronic)978-952-12-2506-2
    ISBN (Print)978-952-12-2505-5
    Publication statusPublished - 2010
    MoE publication typeA4 Article in a conference publication
    EventACEME10 Third International Conference on Accelerated Carbonation for Environmental and Materials Engineering - Turku, Finland
    Duration: 29 Nov 20101 Dec 2010

    Conference

    ConferenceACEME10 Third International Conference on Accelerated Carbonation for Environmental and Materials Engineering
    Abbreviated titleACEME10
    CountryFinland
    CityTurku
    Period29/11/101/12/10

    Keywords

    • silica
    • nanosilica
    • silicate
    • olivine
    • serpentine
    • wollastonite

    Fingerprint Dive into the research topics of 'Production of silica and calcium carbonate particles from silicate minerals for ink jet paper coating and filler purposes'. Together they form a unique fingerprint.

    Cite this