Wool scouring
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United States of America Patent
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-
Sep 14, 1982
Grant Date -
N/A
app pub date -
Sep 5, 1980
filing date -
Sep 7, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In wool scouring systems in which scouring liquor is continuously withdrawn from the scouring bowls for separation of solid contaminants and wool grease and then recycled to the bowls, improved separation of solids is achieved by adding a soluble silicate, and preferably also a polyelectrolyte to the liquor before solids separation. Silicate can advantageously replace soda as scouring agent. Improved operation can also be obtained by controlled flow down from the circulatory system, as at 27, and by passing the jet phase from a disc centrifuge 17 to a decanter centrifuge 15 for further separation of solids. Alternatively, the entire liquor circulation may be passed first to the disc centrifuge and only the jet phase to the decanter, the middle liquor phase being recycled.
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