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Verfahren zur Abtrennung suspendierter Feststoffe

Separating suspended solids from aqueous media, useful e.g. in microelectronics, food, pharmaceutical or textile industries, comprises using a highly-charged cationic poly-electrolyte with hydrophobic residues as flocculating agent
: Jaeger, W.; Laschewsky, A.; Schwarz, S.; Lunkwitz, K.; Petzold, G.

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DE 102005009809 A: 20050303
DE 2005-102005009809 A: 20050303
WO 2006-EP1604 A: 20060222
DE 102005009809 A1: 20060907
Patent, Elektronische Publikation
Fraunhofer IAP ()

Die Erfindung betrifft ein Verfahren zur Abtrennung suspendierter Feststoffe aus waessrigen Medien, bei dem speziell angepasste Flockungsmittel eingesetzt werden. Diese basieren auf hochgeladenen kationischen Polyelektrolyten, die hydrophobe Molekuelanteile besitzen.


DE 102005009809 A1 UPAB: 20061127 NOVELTY - Separating suspended solids from aqueous media comprises mixing the medium with a flocculating agent consisting of a highly-charged cationic polyelectrolyte with hydrophobic residues and then separating the flocculated material from the medium. USE - The highly-charged cationic polyelectrolytes with hydrophobic residues are used for separating suspended solids from aqueous media, especially slurries from the microelectronics industry and waste water from pharmaceutical-, food or textile industries (claimed). Other fields of application include paper production, metals, ceramics, printing, biotechnology and cosmetics. ADVANTAGE - The method provides a wide flocculation window and overcomes the problems associated with prior-art methods, i.e. in the separation of suspensions containing finely-divided particles with a low surface charge, suspensions with a low solid content, suspensions containing large amounts of interfering auxiliary substances (surfactants, stabilizers, pigments, oils), and concentrated slurries containing particles with a very wide particle size distribution.