EP 0640153 A1 19950301 - METHOD FOR CLEANING ALUMINUM AT LOW TEMPERATURES.
Title (en)
METHOD FOR CLEANING ALUMINUM AT LOW TEMPERATURES.
Title (de)
VERFAHREN ZUM REINIGEN VON ALUMINIUM BEI NIEDRIGEN TEMPERATUREN.
Title (fr)
PROCEDE DE NETTOYAGE DE L'ALUMINIUM A BASSES TEMPERATURES.
Publication
Application
Priority
- AU PL241092 A 19920514
- US 9304316 W 19930512
Abstract (en)
[origin: WO9323590A1] An acidic cleaning process for aluminum, especially aluminum cans, that includes a pre-cleaning washing stage followed by an acid cleaning stage is improved by including in the pre-cleaning washing solution both of (i) a component of polyalkoxylated straight or branched chain alcohol surfactant and (ii) a component of polyalkylene glycol-abietic acid surfactant, which are maintained during the process in a ratio of component (i) to component (ii) within the range from 0.4:1 to 3.0:1. The method is particularly useful when the acid cleaning stage also contains both these types of surfactants, but at a lower ratio. A pre-cleaner replenisher composition comprising water, sulfuric acid, and polyalkoxylated straight or branched chain alcohol surfactant is advantageously used in the process.
IPC 1-7
IPC 8 full level
CPC (source: EP KR)
C23G 1/12 (2013.01 - KR); C23G 1/125 (2013.01 - EP)
Citation (search report)
See references of WO 9323590A1
Designated contracting state (EPC)
AT BE DE ES FR GB GR IT SE
DOCDB simple family (publication)
WO 9323590 A1 19931125; AT E151120 T1 19970415; BR 9306357 A 19980630; CA 2135391 A1 19931125; DE 69309460 D1 19970507; DE 69309460 T2 19971009; EP 0640153 A1 19950301; EP 0640153 B1 19970402; ES 2101315 T3 19970701; GR 3023464 T3 19970829; JP H07508074 A 19950907; KR 950701691 A 19950428; MY 110663 A 19990130; SG 68573 A1 19991116; ZA 933362 B 19931208
DOCDB simple family (application)
US 9304316 W 19930512; AT 93911127 T 19930512; BR 9306357 A 19930512; CA 2135391 A 19930512; DE 69309460 T 19930512; EP 93911127 A 19930512; ES 93911127 T 19930512; GR 970401113 T 19970516; JP 50364094 A 19930512; KR 19940704066 A 19941114; MY PI19930896 A 19930514; SG 1996007008 A 19930512; ZA 933362 A 19930513