EP 1086043 A1 20010328 - WASTE ACID RECOVERY
Title (en)
WASTE ACID RECOVERY
Title (de)
WIEDERGEWINNUNG VON ABFALLSÄURE
Title (fr)
RECUPERATION D'ACIDE EPUISE
Publication
Application
Priority
- US 9821275 W 19981007
- US 9806400 W 19980331
Abstract (en)
[origin: WO9950177A1] A process for purifying a sulfuric acid solution such as by cooling a sulfuric acid solution to at or near its freezing point to form a slurry of a solid phase and a liquid phase. The slurry has an acid-rich region and an acid-poor region. The acid-rich region is separated from the acid-poor region on the basis of density.
IPC 1-7
IPC 8 full level
C01B 17/90 (2006.01); C01B 17/92 (2006.01); C02F 1/22 (2006.01); C02F 1/38 (2006.01)
CPC (source: EP KR)
C01B 17/90 (2013.01 - KR); C01B 17/905 (2013.01 - EP); C01B 17/92 (2013.01 - EP); C02F 1/22 (2013.01 - EP); C02F 1/38 (2013.01 - EP); Y02P 20/145 (2015.11 - EP)
Citation (search report)
See references of WO 9950177A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 9950177 A1 19991007; AU 1796099 A 19991018; CN 1292766 A 20010425; EP 1086043 A1 20010328; JP 2003526589 A 20030909; KR 20010042375 A 20010525
DOCDB simple family (application)
US 9821275 W 19981007; AU 1796099 A 19981007; CN 98814013 A 19981007; EP 98962803 A 19981007; JP 2000541095 A 19981007; KR 20007010943 A 20000930