EP 3404084 C0 20230809 - WASHING METHOD FOR ROLLING AND DRESSING OILS
Title (en)
WASHING METHOD FOR ROLLING AND DRESSING OILS
Title (de)
WASCHVERFAHREN FÜR WALZ- UND DRESSIERÖLE
Title (fr)
PROCÉDÉ DE LAVAGE POUR DES HUILES DE ROULEAU ET DE DRESSAGE
Publication
Application
Priority
EP 17171441 A 20170517
Abstract (en)
[origin: JP2019022906A] SOLUTION: There is provided a method for reproducing oil contaminated with aluminum from a rolling process/surface finishing process which intensively mixes contaminated oil with alkali hydroxide metal aqueous solution to wash away aluminum, subsequently causes phase separation between an aqueous phase and a purified oil phase, then separates the aqueous phase from the oil phase, and finally removes residual water and a suspensoid present in some cases by a drying agent from the oil phase so as to be used as pure oil in the rolling process or surface finishing process so that a mass ratio of the contaminated oil to the alkali hydroxide metal aqueous solution is at least 1:2.EFFECT: A method for cleaning surface finishing oil purifies contaminated oil through a non-continuous process without a thermal separation method so as to be able to use the purified oil as pure oil again.SELECTED DRAWING: Figure 1
IPC 8 full level
C10M 175/00 (2006.01); C10M 175/02 (2006.01)
CPC (source: EP)
C10M 175/005 (2013.01); C10M 175/02 (2013.01); C10M 2209/104 (2013.01); C10M 2209/105 (2013.01); C10N 2010/02 (2013.01); C10N 2040/245 (2020.05)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Participating member state (EPC – UP)
AT BE BG DE DK EE FI FR IT LT LU LV MT NL PT SE SI
DOCDB simple family (publication)
EP 3404083 A1 20181121; EP 3404084 A1 20181121; EP 3404084 B1 20230809; EP 3404084 C0 20230809; JP 2019022906 A 20190214; JP 6762988 B2 20200930
DOCDB simple family (application)
EP 17171441 A 20170517; EP 18171973 A 20180514; JP 2018093076 A 20180514