Removal of oil from water

Details Removal of oil from water Removal of oil from water

1992-03-19

1994-02-01

Straub, Gary P.

Liquid purification or separation

Processes

Ion exchange or selective sorption

585826, 210694, 210924, B01D 1508, C02F 128

Patent

active

052829758

ABSTRACT:
A hydrophobic and oleophilic particular vermicular structure of expanded graphite, possessing the property of absorbing in a selective manner only large amounts of petroleum products from a water media is described. This expanded grahite is characterized by three main properties: (a) a specific density in the range of 0.003-0.1 g/ml; (b) a surface area in the range of 50-200 m.sup.2 g/ml; and (c) closed pores in the range of 3% to 20%. The particular structure of the expanded graphite can be used in the form of particulate, pillows, blankets, booms or as a filter medium. Preferred particles sizes of the expanded graphite are in the range of between 0.5 to 3 mm. The oil absorbed onto the expanded grahite can be released by pressure or recovered by solvent extraction.

REFERENCES:
patent: 2817605 (1957-12-01), Sanz et al.
patent: 3338815 (1967-08-01), Groszek
patent: 3357929 (1967-12-01), Olstowski
patent: 3769199 (1973-10-01), Groszek
patent: 4533086 (1985-08-01), Junttila
patent: 4961988 (1990-10-01), Zhu
D. D. L. Chung Journal of Material Science Dec. 22, 1987, pp. 4190-4198.

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