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    Method for separating fine particles by selective hydrophobic coagulation

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    Publication Date
    1992-11-10
    Filing Date
    1990-04-24
    Inventor
    Yoon, Roe-Hoan
    Luttrell, Gerald H.
    Metadata
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    Abstract
    A process of selectively agglomerating coal in an aqueous environment while leaving the mineral matter dispersed has been developed. This process is autogenous for hydrophobic particles in that neither an agglomerating agent nor an electrolytic coagulant is needed. It is based on the finding that hydrophobic particles are pushed against each other by the surrounding water structure. This process, which is referred to as selective hydrophobic coagulation, is driven by the so-called hydrophobic interaction energy, which is not included in the classical DLVO theory describing the stability of lyophobic suspensions. The relatively small coagula formed by the selective hydrophobic coagulation process can be readily separated from the dispersed mineral matter by several different techniques such as screening, elutriation, sedimentation and froth flotation.
    Assignee
    Virginia Tech Intellectual Properties, Inc.
    Patent Number
    5161694
    Application Number
    7513884
    Source URL
    http://pimg-fpiw.uspto.gov/fdd/94/616/051/0.pdf
    Primary/U.S. Class
    209/5
    Other/U.S. Class
    209/8
    209/9
    209/165
    209/167
    44/624
    44/627
    CPC Class
    B03D3/02
    B03B1/04
    B03C1/01
    Patent Type
    utility
    URI
    http://hdl.handle.net/10919/72741
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    • Virginia Tech Patents [619]

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