Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...
Reexamination Certificate
2007-09-25
2007-09-25
Menon, Krishnan S. (Department: 1723)
Liquid purification or separation
Processes
Liquid/liquid solvent or colloidal extraction or diffusing...
C210S636000, C210S749000, C210S750000, C210S791000, C426S330400, C426S330300, C426S590000, C426S592000, C426S495000
Reexamination Certificate
active
10517566
ABSTRACT:
The invention relates to a crossflow-filtration method for beverages, in particular beer, which comprises the following steps: a) the feed liquid is introduced into a filter module by means of a tangential flow through a filter membrane (6) in a first direction, whereby the filtrate flow on the filtrate side (19) of the filter module is maintained within predetermined threshold values; b) the entry pressure is reduced and the filter is backflushed by surges of filtrate initiated by a reversal of the flow direction transversally to the membrane; c) the feed liquid is optionally introduced in an inverse flow direction to that of step a) and the concentrate is evacuated on the non-filtrate (7) side of the module; d) the entry pressure is reduced and the filter is backflushed by surges of filtrate initiated by a reversal of the flow direction transversally to the membrane; e) steps a) to d) are repeated until the filtrate flow lies below the lower predetermined threshold value; f) to k) the filter is emptied by applying pressure, backflushed, rinsed and l) steps a) to k) are resumed.
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International Search Report for PCT/EP2003/006296 dated Oct. 29, 2003.
Armgart Dieter
Diel Bernhard
Grabosch Matthias
Rodenberg Michael
Casella Anthony J.
Hespos Gerald E.
Menon Krishnan S.
Sartorius Biotech GmbH
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