Coagulation using kerosene for magnetic deinking of waste office paper

Tatsuya Oki, Shuji Owada, Hiroki Yotsumoto, Hirokazu Tanuma, Yuu Takeuchi

    Research output: Contribution to journalArticle

    Abstract

    A method for disintegrating waste office paper using kerosene was reported in our previous paper, which achieved almost a 100% liberation of toner from paper fibers. The liberated toner must be completely separated to realize effective deinking. Recently, a new method for deinking waste officer paper by magnetic separation after hetero-coagulation of magnetic and non-magnetic toner by 1-octadecanol was reported by Augusta et al. Under this method, coagulation was carried out at 72°C. The 1-octadecanol liquid was then cooled to produce strong solid coagulates. As reported in our previous paper, kerosene has the ability to soften toner, and strong coagulates for magnetic separation may be produced by their adhesion when used as a flocculant. The present study investigated the size of toner particles liberated by the kerosene disintegration method, and compared the bonding strength between the toner particles coagulated by the addition of kerosene as a flocculant to those coagulated with 1-octadecanol. After these investigations, the coagulating and deinking properties of kerosene and 1-octadecanol were compared by rejecting toner coagulates with a neodymium-boron magnet. The results showed that nearly perfect deinking can be achieved with little paper loss, even in ambient temperature, due to the large and strong coagulates produced by this method. When kerosene was used in the disintegration and coagulation stages, the average coagulate size was 1114 μm, and a deinking percentage of 98.4% was attained through separation with a neodymium-boron magnet.

    Original languageEnglish
    Pages (from-to)320-326
    Number of pages7
    JournalMaterials Transactions
    Volume44
    Issue number2
    Publication statusPublished - 2003 Feb

    Fingerprint

    Deinking
    kerosene
    Kerosene
    coagulation
    Coagulation
    Neodymium
    Magnetic separation
    Boron
    Disintegration
    disintegration
    neodymium
    Magnets
    boron
    magnets
    Waste paper
    ambient temperature
    adhesion
    Adhesion
    fibers
    stearyl alcohol

    Keywords

    • Coagulation
    • Deinking
    • Kerosene
    • Magnetic separation
    • Office paper
    • Paper recycling
    • Toner

    ASJC Scopus subject areas

    • Materials Science(all)
    • Metals and Alloys

    Cite this

    Oki, T., Owada, S., Yotsumoto, H., Tanuma, H., & Takeuchi, Y. (2003). Coagulation using kerosene for magnetic deinking of waste office paper. Materials Transactions, 44(2), 320-326.

    Coagulation using kerosene for magnetic deinking of waste office paper. / Oki, Tatsuya; Owada, Shuji; Yotsumoto, Hiroki; Tanuma, Hirokazu; Takeuchi, Yuu.

    In: Materials Transactions, Vol. 44, No. 2, 02.2003, p. 320-326.

    Research output: Contribution to journalArticle

    Oki, T, Owada, S, Yotsumoto, H, Tanuma, H & Takeuchi, Y 2003, 'Coagulation using kerosene for magnetic deinking of waste office paper', Materials Transactions, vol. 44, no. 2, pp. 320-326.
    Oki T, Owada S, Yotsumoto H, Tanuma H, Takeuchi Y. Coagulation using kerosene for magnetic deinking of waste office paper. Materials Transactions. 2003 Feb;44(2):320-326.
    Oki, Tatsuya ; Owada, Shuji ; Yotsumoto, Hiroki ; Tanuma, Hirokazu ; Takeuchi, Yuu. / Coagulation using kerosene for magnetic deinking of waste office paper. In: Materials Transactions. 2003 ; Vol. 44, No. 2. pp. 320-326.
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