Liquid purification or separation – Filter – Movable medium
Patent
1993-05-17
1994-06-14
Savage, Matthew O.
Liquid purification or separation
Filter
Movable medium
210387, 210401, 425197, B01D 3304, B01D 33044
Patent
active
053207530
ABSTRACT:
Filtration process and filters for use with materials such as, but not limited to, melts, utilizing a band of filter medium sealed in the filter rollers to seal the material from the outside. In one embodiment, the seal rollers reduce to a minimum the leakage of melt to the outside and make it possible to advance the filter medium through the filter continuously. In various embodiments, the filter medium can be advanced either by the takeup spool or by driving the seal rollers and the rate of movement of the filter medium through the filter can be controlled to maintain a constant pressure drop across the filter. Two component wear-resistant seals are also provided. Maintaining constant conditions through continuous advancement of the filter medium during filtration yields higher product quality and dimensional stability.
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Keillor, III Peter T.
Kirksey William A.
Savage Matthew O.
The Dow Chemical Company
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