Liquid purification or separation – Processes – Separating
Patent
1996-09-17
1999-07-27
Popovics, Robert J.
Liquid purification or separation
Processes
Separating
210790, 2103231, 2103232, 210340, 210420, 210424, 425199, B01D 3700, B01D 3512
Patent
active
059285230
ABSTRACT:
A filtering method and apparatus for continuously filtering a polymeric melt, which includes a plurality of filter chambers which are arranged in a melt flow path parallel to one another. Also, an intermediate filter is arranged parallel to the filter chambers. When one of the filter chambers is disconnected for the purpose of cleaning or replacing the filter element therein, the intermediate filter is connected synchronously in the melt flow path and, after the filter chamber is cleaned, or the filter element is exchanged, the flow is switched back through the filter chamber, and the intermediate filter is again disconnected.
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patent: 4772197 (1988-09-01), Heck
patent: 4775487 (1988-10-01), El-Saie
patent: 5200077 (1993-04-01), McNeice et al.
patent: 5417856 (1995-05-01), Bacher et al.
patent: 5462653 (1995-10-01), Hills
Filtration System Maintains Continuous Flow During Filter Changes, SPE Journal, vol. 27, No. 4, Apr. 1971, 1 page.
Chemical Fibers International, Polymer Filtration, vol. 45, p. 398, Oct. 1995.
Hobrecht Knut
Itter Friedhelm
Barmag AG
Popovics Robert J.
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