EP 4077749 A1 20221026 - METHOD FOR REMOVING LEAD FROM BRASS
Title (en)
METHOD FOR REMOVING LEAD FROM BRASS
Title (de)
VERFAHREN ZUM ENTFERNEN VON BLEI AUS MESSING
Title (fr)
PROCÉDÉ D'ÉLIMINATION DU PLOMB DU LAITON
Publication
Application
Priority
- SE 1951540 A 20191220
- EP 2020086741 W 20201217
Abstract (en)
[origin: WO2021122974A1] A method for removing lead from brass scrap, said method comprising: - subjecting brass scrap comprising alloyed copper, zinc and lead to heating under reduced pressure at a temperature above the boiling point of lead at the reduced pressure but below the melting point of the copper base of the brass scrap at the reduced pressure, to evaporate lead and zinc, and - recovering the evaporated lead and zinc by condensation.
IPC 8 full level
C22B 7/00 (2006.01); C22B 9/04 (2006.01); C22B 9/14 (2006.01)
CPC (source: EP SE)
C22B 7/005 (2013.01 - EP); C22B 9/04 (2013.01 - EP SE); C22B 9/14 (2013.01 - EP SE); C22B 7/00 (2013.01 - SE); C22B 13/00 (2013.01 - SE); C22B 15/00 (2013.01 - SE); C22B 19/00 (2013.01 - SE); C22C 3/005 (2013.01 - SE); C22C 9/04 (2013.01 - SE); Y02P 10/20 (2015.11 - EP)
Citation (search report)
See references of WO 2021122974A1
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
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
WO 2021122974 A1 20210624; CN 115151664 A 20221004; EP 4077749 A1 20221026; SE 1951540 A1 20210621; SE 543879 C2 20210914
DOCDB simple family (application)
EP 2020086741 W 20201217; CN 202080088414 A 20201217; EP 20829531 A 20201217; SE 1951540 A 20191220