EP 3994307 A4 20230726 - KRAFT PULP MILL SCALE CONTROL WITH END GROUP MODIFIED POLYCARBOXYLATES
Title (en)
KRAFT PULP MILL SCALE CONTROL WITH END GROUP MODIFIED POLYCARBOXYLATES
Title (de)
KESSELSTEINKONTROLLE IN KRAFTZELLSTOFFWERKEN MIT ENDGRUPPENMODIFIZIERTEN POLYCARBOXYLATEN
Title (fr)
RÉGULATION DES BATTITURES DE PÂTE KRAFT AVEC DES POLYCARBOXYLATES MODIFIÉS PAR DES GROUPES TERMINAUX
Publication
Application
Priority
- US 201962869235 P 20190701
- US 2020040221 W 20200630
Abstract (en)
[origin: US2021002826A1] Scale build-up on metal surfaces of a black liquor evaporator is prevented or mitigated by treating the black liquor with a deposit inhibiting concentration of a water-soluble polymer containing a polycarboxylate chain and a 3-mercaptopropionic acid end group.
IPC 8 full level
D21C 9/00 (2006.01); C04B 24/04 (2006.01); C08F 22/26 (2006.01); D21C 3/20 (2006.01); D21C 11/10 (2006.01)
CPC (source: EP KR US)
D21C 3/02 (2013.01 - EP KR); D21C 9/008 (2013.01 - EP KR); D21C 11/0092 (2013.01 - EP KR US); D21C 11/106 (2013.01 - EP KR US)
Citation (search report)
- [XI] JP 2012031326 A 20120216 - NIPPON CATALYTIC CHEM IND
- [X] US 3404063 A 19681001 - HARDING CHARLES I
- [X] CN 109879627 A 20190614 - SHAANXI RUIXING BUILDING MATERIALS TECH CO LTD
- [A] US 2008277083 A1 20081113 - SHEVCHENKO SERGEY M [US], et al
- [A] WO 0012436 A1 20000309 - NALCO CHEMICAL CO [US]
- [A] US 3516910 A 19700623 - ENGMAN WILLIAM C, et al
- [A] WO 02098803 A1 20021212 - SOLUTIA INC [US], et al
- See references of WO 2021003115A1
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
DOCDB simple family (publication)
US 2021002826 A1 20210107; BR 112022000003 A2 20220215; CA 3145550 A1 20210107; CL 2021003583 A1 20220923; CN 114096712 A 20220225; EP 3994307 A1 20220511; EP 3994307 A4 20230726; KR 20220034140 A 20220317; WO 2021003115 A1 20210107
DOCDB simple family (application)
US 202016916127 A 20200630; BR 112022000003 A 20200630; CA 3145550 A 20200630; CL 2021003583 A 20211230; CN 202080047890 A 20200630; EP 20834429 A 20200630; KR 20227003430 A 20200630; US 2020040221 W 20200630