(19)

(11)

EP 3 894 051 A1

(12)

(43) Date of publication: 20.10.2021 Bulletin 2021/42 (21) Application number: 19894621.2 (22) Date of filing: 08.03.2019

(51) International Patent Classification (IPC):  B01D 61/02(2006.01) B01D 63/00(2006.01) F04F 5/02(2006.01) B01D 61/14(2006.01) C02F 1/44(2006.01) (52) Cooperative Patent Classification (CPC): B01D 2313/20; C02F 1/441; B01D 2315/10; F04F 5/54; B01D 63/06; C02F 1/442; C02F 1/44; C02F 1/444; F04F 5/466; F04F 5/10 (86) International application number: PCT/FI2019/050186 (87) International publication number: WO 2020/120830 (18.06.2020 Gazette 2020/25)

(84) Designated Contracting States: 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 Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 14.12.2018 WO PCT/FI2018/050930 (71) Applicant: EMP-Innovations OY 05460 Hyvinkää (FI)	(72) Inventors: AULANKO, Esko 04230 Kerava (FI) MUSTALAHTI, Jorma 05620 Hyvinkää (FI) (74) Representative: Salomäki, Juha Kari Ensio  Salomaki Oy Kankurinkatu 4-6 05800 Hyvinkää 05800 Hyvinkää (FI)