EP 2911980 A1 20150902 - METHOD AND COMPOSITION FOR WATER PURIFICATION AND SLUDGE DEWATERING
Title (en)
METHOD AND COMPOSITION FOR WATER PURIFICATION AND SLUDGE DEWATERING
Title (de)
VERFAHREN UND ZUSAMMENSETZUNG ZUR WASSERREINIGUNG UND SCHLAMMENTWÄSSERUNG
Title (fr)
PROCÉDÉ ET COMPOSITION D'ÉPURATION D'EAU ET DE DÉSHYDRATATION DE BOUES
Publication
Application
Priority
- DE 102012021103 A 20121026
- EP 2013072022 W 20131022
Abstract (en)
[origin: CA2889528A1] The invention relates to a method for purifying water and for dewatering sludge, comprising the following steps: bringing a surface-treated natural calcium carbonate, a natural bentonite and an anionic polymer into contact with the water or sludge, flakes being formed as a result of the agglomeration of particulate materials contained in said water or sludge, and separating said formed flakes so as to obtain purified water, or separating water in order to obtain dewatered sludge. The surface-treated natural calcium carbonate is a product of a reaction of natural calcium carbonate with an acid and carbon dioxide, which is formed in situ by the acid treatment and/or is fed from outside, and is produced as an aqueous suspension with a pH greater than 6.0 measured at 20°C. The invention also relates to a composition comprising said surface-treated natural calcium carbonate, a natural bentonite, and an anionic polymer, for the purpose of purifying water or dewatering sludge.
IPC 8 full level
C02F 1/28 (2006.01); B01J 20/04 (2006.01); C02F 101/10 (2006.01); C02F 101/20 (2006.01); C02F 101/22 (2006.01); C02F 101/30 (2006.01); C02F 101/32 (2006.01); C02F 103/10 (2006.01); C02F 103/28 (2006.01); C02F 103/32 (2006.01)
CPC (source: EP US)
B01J 20/043 (2013.01 - EP US); B01J 20/12 (2013.01 - EP US); B01J 20/24 (2013.01 - EP US); B01J 20/261 (2013.01 - EP US); B01J 20/28004 (2013.01 - EP US); B01J 20/28054 (2013.01 - EP US); B01J 20/28057 (2013.01 - EP US); C02F 1/385 (2013.01 - US); C02F 1/5263 (2013.01 - EP US); C02F 1/54 (2013.01 - US); C02F 11/148 (2018.12 - EP US); B01J 2220/46 (2013.01 - EP US); C02F 1/281 (2013.01 - EP US); C02F 1/56 (2013.01 - EP US); C02F 1/66 (2013.01 - EP US); C02F 2101/20 (2013.01 - EP US); C02F 2103/001 (2013.01 - EP US); C02F 2103/16 (2013.01 - EP US); C02F 2103/20 (2013.01 - EP US); C02F 2103/28 (2013.01 - EP US); C02F 2103/30 (2013.01 - US); C02F 2103/32 (2013.01 - EP US)
Citation (search report)
See references of WO 2014064073A1
Citation (examination)
EP 2011766 A1 20090107 - OMYA DEVELOPMENT AG [CH]
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
DOCDB simple family (publication)
DE 102012021103 A1 20140430; AU 2013336734 A1 20150514; BR 112015009262 A2 20170704; CA 2889528 A1 20140501; CL 2015001069 A1 20151228; CN 104837775 A 20150812; EP 2911980 A1 20150902; JP 2016500565 A 20160114; MX 2015005216 A 20150714; RU 2015119675 A 20161220; SG 11201503258Y A 20150629; US 2015274565 A1 20151001; WO 2014064073 A1 20140501
DOCDB simple family (application)
DE 102012021103 A 20121026; AU 2013336734 A 20131022; BR 112015009262 A 20131022; CA 2889528 A 20131022; CL 2015001069 A 20150424; CN 201380063955 A 20131022; EP 13779601 A 20131022; EP 2013072022 W 20131022; JP 2015538402 A 20131022; MX 2015005216 A 20131022; RU 2015119675 A 20131022; SG 11201503258Y A 20131022; US 201314438579 A 20131022