Liquid purification or separation – Processes – Making an insoluble substance or accreting suspended...
Patent
1995-06-07
1996-12-24
Hruskoci, Peter A.
Liquid purification or separation
Processes
Making an insoluble substance or accreting suspended...
44572, 44626, 209 5, 210712, 210729, 210770, C02F 154
Patent
active
055870856
ABSTRACT:
Fine particles 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 particle surface. Thermodynamically, this process is spontaneous. The only energy required for this process is to recover the hydrophobic liquid(s) for recycling purposes. The hydrophobic liquids are recovered in gaseous form either by lowering the pressure or by heating, and converted 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 may also be used for the dewatering process described in the present invention. The process of dewatering by displacement is capable of achieving the same or better level of moisture reduction as thermal drying but at substantially lower energy costs.
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Luttrell Gerald H.
Yoon Roe-Hoan
Hruskoci Peter A.
Virginia Tech Intellectual Property Inc.
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