Method for dewatering fine coal

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dc.contributor.assigneeCenter for Innovative Technologyen
dc.contributor.assigneeVirginia Polytechnic Institute and State Universityen
dc.contributor.assigneeVirginia Tech Intellectual Properties, Inc.en
dc.contributor.departmentMining and Minerals Engineeringen
dc.contributor.inventorYoon, Roe-Hoanen
dc.contributor.inventorLuttrell, Gerald H.en
dc.date.accessed2016-08-19en
dc.date.accessioned2016-08-24T17:53:42Zen
dc.date.available2016-08-24T17:53:42Zen
dc.date.filed1994-04-18en
dc.date.issued1995-10-17en
dc.description.abstractFine coals are dewatered in an energy efficient process in which a non-polar liquid or a mixture of different hydrophobic liquids are used to displace the water from the coal surface. This process works with higher rank coals that are naturally hydrophobic so that the coal surface from which the water is displaced has a stronger affinity for the hydrophobic liquid than the water. Thermodynamically, this process is spontaneous and, hence, requires no energy. The only energy required for this process is to recover the spent hydrophobic liquid(s) for recycling purposes. The hydrophobic liquids are recovered in gaseous form either by lowering the pressure or by heating, and coverted back to liquid form for re-use. The most economical reagents that can be used for this purpose include propane, butane, pentane, and ethane. Carbon dioxide can also be used for the dewatering process described in the present invention. The process of dewatering by displacement is capable of achieving the same level of moisture reduction as thermal drying but at substantially lower energy costs.en
dc.format.mimetypeapplication/pdfen
dc.identifier.applicationnumber8229012en
dc.identifier.patentnumber5458786en
dc.identifier.urihttp://hdl.handle.net/10919/72299en
dc.identifier.urlhttp://pimg-fpiw.uspto.gov/fdd/86/587/054/0.pdfen
dc.language.isoenen
dc.publisherUnited States Patent and Trademark Officeen
dc.subject.cpcB03B1/04en
dc.subject.cpcC02F1/547en
dc.subject.cpcC02F1/54en
dc.subject.cpcC02F11/14en
dc.subject.cpcC02F2101/10en
dc.subject.cpcC02F2101/105en
dc.subject.cpcC02F2101/20en
dc.subject.cpcC02F2101/32en
dc.subject.cpcF26B5/005en
dc.subject.cpcF26B2200/18en
dc.subject.uspc209/5en
dc.subject.uspcother210/711en
dc.subject.uspcother210/712en
dc.subject.uspcother210/729en
dc.subject.uspcother210/770en
dc.subject.uspcother44/572en
dc.subject.uspcother44/626en
dc.titleMethod for dewatering fine coalen
dc.typePatenten
dc.type.dcmitypeTexten
dc.type.patenttypeutilityen

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