The British Petroleum Company, P.l.c.

Kalsep Limited

Anthony S MacFarlane

Philip A Medlicott

Anna C Lawrence

Simon Clarke

Philip K Chown

Eric C Green

Giselle M Brown

A filter coalescer cartridge for removing contaminants from a liquid comprises:

Coalescing filter using an expandable bed fiber

A method of coalescence involves the use of a coalescer element consisting essentially of or comprising a sintered polymeric media having a fine porous structure. Suitable polymers include thermoplastics or thermosetting resins. The element is suitable for de-oiling oily water and dewatering crude oil.

Method for coalescence

A backwashable filter comprises (a) an outer case, (b) a rotatable, permeable filter drum, (c) a fibrous filter element supported on the surface of the drum, (d) one or more stationary backwash arms, (e) a feed inlet leading to one side of the filter drum and (f) a filter outlet emerging from the other side of the drum. The backwash arms are in close contact with the filter element. The tendency of the feedstock to bypass the filter and enter the backwash arms is thereby reduced.

Backwashable filter

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Lightwater, United Kingdom

Anthony S MacFarlane