Fluid treatment process
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United States of America Patent
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-
Mar 19, 2002
Grant Date -
N/A
app pub date -
Sep 16, 1997
filing date -
May 4, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Non-aqueous functional fluids are treated to avoid degradation or to recondition degraded fluids by a process which comprises contacting the fluid with an anionic ion-exchange resin and subsequently removing water by vacuum dehydration. The fluids can be restored and maintained at a water content of less than 0.1% w/w and an acid number of less than 0.2 mgKOH/gm. The fluid is preferably a triaryl phosphate based fluid. Treated fluids may exhibit improved properties especially increased resistivity.
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