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US 4,734,207 AGranted
Purification of oils containing solid matters in suspension
AssigneeAusimont S.p.A.
InventorsEnzo Calloni, Maurizio Valente, Alfonso Raiola
Life of this patent
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Abstract
A process and apparatus for the purification of oils, such as perfluoropolyether oils or silicone oils or oils based on hydrocarbons, polluted by various impurities and in particular by solid matters in suspension, which solid matters can be filtered only with difficulty on conventional filters, comprising a filtration carried out by means of a filter of the tangential-flow type, wherein the pores of the filter element have a diameter below 0.4 micron.
Claims5
A process comprising:
- purifying oils selected from the group consisting of perfluoropolyether oils, and silicone oils, and oils based on hydrocarbons, from different impurities and in particular solid matters in suspension which can be filtered only with difficulty on conventional filters, by providing a filter of the tangential-flow type, wherein the pores of the filter element have a diameter below 0.4 micron, feeding the oil to be filtered to the said filter at high speed sufficient to avoid formation of solid deposits on the surface of said element.
Dependencies are inferred from the claim text.