Liquid purification or separation – Processes – Including controlling process in response to a sensed condition
Patent
1988-11-22
1990-06-19
Spear, Frank
Liquid purification or separation
Processes
Including controlling process in response to a sensed condition
210 88, 210 98, 210108, 210142, 210188, 2103331, 210340, 210791, 55 55, B01D 2938, B01D 1900
Patent
active
049351516
ABSTRACT:
In a process for degassing and filtering liquids, particularly coating emulsions, a feed stream (F) is subdivided into a process stream (N), which is fed continuously to a process use through a main filter (16), and a recycled fractional stream. The fractional stream (T) is used to backflush successive sections of the main filter (16) and in turn is filtered through a supplementary filter (21, 22). In the apparatus for the process, a backflushing device (17) is associated with the main filter (16), the fractional stream (T) is used as a flushing means and the filter surface of the main filter (16) is cleaned progressively. Thus, a liquid with a continually constant grain size distribution, without gas bubbles and particles that cause defects, can be delivered continuously to the specific use.
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Drodge Joseph
E. I. Du Pont de Nemours and Company
Spear Frank
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