COOLANT REGENERATION METHOD

WIPO Patent Application WO/2013/035438

A1

This coolant regeneration method (1a) involves: a centrifugal separation and circulation step (A) comprising a centrifugal separation step (S2) for supplying a portion of a used coolant (3) to a centrifugal separation unit (2) having a vertical centrifugal separator and for centrifugally separating the same into a solid portion (17) and a centrifugally separated liquid (19), and a centrifugally separated liquid mixing step (S3) for mixing the centrifugally separated liquid (19) with the used coolant (3); a membrane separation and circulation step (B) comprising a membrane separation step (S4) for supplying the rest of the used coolant (3) to a membrane separation unit (7) having a filter membrane (6) and for separating the same by means of the membrane into a concentrated liquid (22) and a membrane filtered liquid (21), and a concentrated liquid mixing step (S5) for mixing the concentrated liquid (22) with the used coolant (3); and a coolant mix generation step (S6) for mixing the circulated centrifugally separated liquid (19) and the recovered membrane-filtered liquid (21) and producing a coolant (4).

BOHNO SHIGEKI (JP)
NISHIDA TAKAHARU (JP)
OGITA DAI (JP)
NOBUTO YOSHIKI (JP)
YAMADA KOJI (JP)

PCT/JP2012/068197

March 14, 2013

July 18, 2012

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KURARAY CO (JP)
BOHNO SHIGEKI (JP)
NISHIDA TAKAHARU (JP)
OGITA DAI (JP)
NOBUTO YOSHIKI (JP)
YAMADA KOJI (JP)

B24B57/00; B24B27/06; H01L21/304

JP2004255534A	2004-09-16
JP2002534242A	2002-10-15
JP2003340719A	2003-12-02
JP2010221337A	2010-10-07
JP2003300072A	2003-10-21

MAEDA Kanji et al. (JP)
Kanji Maeda (JP)

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