Cleaning and dewatering fine coal

Yoon, Roe-Hoan; Eraydin, Mert Kerem

Cleaning and dewatering fine coal

Patent · 18 February 2020

OSTI ID:1632556

Yoon, Roe-Hoan; Eraydin, Mert Kerem

Fine coal is cleaned of its mineral matter impurities and dewatered by mixing the aqueous slurry containing both with a hydrophobic liquid, subjecting the mixture to a phase separation. The resulting hydrophobic liquid phase contains coal particles free of surface moisture and droplets of water stabilized by coal particles, while the aqueous phase contains the mineral matter. By separating the entrained water droplets from the coal particles mechanically, a clean coal product of substantially reduced mineral matter and moisture contents is obtained. The spent hydrophobic liquid is separated from the clean coal product and recycled. The process can also be used to separate one type of hydrophilic particles from another by selectively hydrophobizing one.

Research Organization:: Virginia Tech Univ., Blacksburg, VA (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: FC26-05NT42457

Assignee:: Virginia Tech Intellectual Properties, Inc. (Blacksburg, VA)

Patent Number(s):: 10,562,038

Application Number:: 15/786,079

OSTI ID:: 1632556

Country of Publication:: United States

Language:: English

References (6)

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Particles Adsorbed at the Oil−Water Interface: A Theoretical Comparison between Spheres of Uniform Wettability and “Janus” Particles Binks, B. P.; Fletcher, P. D. I. Langmuir, Vol. 17, Issue 16, p. 4708-4710 https://doi.org/10.1021/la0103315	journal	August 2001
An investigation of a separation process involving liquid—water—coal systems Keller, D. V.; Burry, W. Colloids and Surfaces, Vol. 22, Issue 1, p. 37-50 https://doi.org/10.1016/0166-6622(87)80004-5	journal	January 1987
The Demineralization of Coal Using Selective Agglomeration by the T-Process Keller, Jr., D. V.; Burry, W. M. Coal Preparation, Vol. 8, Issue 1-2, p. 1-17 https://doi.org/10.1080/07349349008905169	journal	January 1990
Janus Particles at Liquid−Liquid Interfaces Glaser, Nicole; Adams, Dave J.; Böker, Alexander Langmuir, Vol. 22, Issue 12 https://doi.org/10.1021/la060693i	journal	June 2006
A survey of oil agglomeration in wet fine coal processing Capes, C. E.; Darcovich, K. Powder Technology, Vol. 40, Issue 1-3, p. 43-52 https://doi.org/10.1016/0032-5910(84)85054-8	journal	October 1984

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

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