Liquid purification or separation – Processes – Ion exchange or selective sorption
Patent
1981-05-04
1983-02-15
Castel, Benoit
Liquid purification or separation
Processes
Ion exchange or selective sorption
210794, 210799, 210275, 210290, B01D 1500, B01D 2316
Patent
active
043740294
ABSTRACT:
A regenerative filter having particular application for removal of oil from water. The filter includes a bed of finely divided particles or media separated in three horizontal layers. The top layer is comprised of anthracite particles, the middle layer of silica sand particles, and the bottom layer of garnet sand particles. The filter bed is supported within the filter vessel by a strata of relatively coarse support particles located beneath the bottom layer of filter media. The oil-contaminated water is fed into the top of the vessel and flows through the filter bed and supporting strata to a manifold at the bottom of the tower where it is discharged. By proper selection of the type and size of the media, effective removal of oil from the water is achieved during filtering and loss of media and intermixing of the layers is prevented during the back washing cycle.
REFERENCES:
patent: 3557961 (1971-01-01), Stuart
patent: 3876546 (1975-04-01), Hsiung et al.
patent: 4197205 (1980-04-01), Hirs
patent: 4315822 (1982-02-01), Jasinghani
Castel Benoit
Nelson Industries Inc.
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