Method for regenerating an auxiliary filtering agent

Details Method for regenerating an auxiliary filtering agent Method for regenerating an auxiliary filtering agent

2011-08-09

2011-08-09

Popovics, Robert James (Department: 1776)

Liquid purification or separation

Processes

Separating

C210S777000, C210S791000, C210S792000, C210S193000

Reexamination Certificate

active

07993533

ABSTRACT:
Processes comprising: (i) providing a filter aid comprising a co-extrudate of a water-insoluble polyvinylpyrrolidone and a thermoplastic polymer, (ii) treating the filter aid with aqueous alkali; (iii) subsequently treating the filter aid with an enzyme; and (iv) subsequently thereto carrying out a second treatment with aqueous alkali, to provide a regenerated filter aid, and uses therefor.

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Verfahrenstechnik, Filtration, GTM Mar. 2006, pp. 44-49.

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