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Preparation of water-soluble polymers for flocculants with improved dewatering characteristics

Publications associées (45)

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An asymptotic result for Brownian polymers

Thomas Mountford

We consider a model of the shape of a growing polymer introduced by Durrett and Rogers (Probab. Theory Related Fields 92 (1992) 337-349). We prove their conjecture about the asymptotic behavior of the underlying continuous process X-t (corresponding to the ...

2008

Electrochemical treatment of industrial wastewater

Christos Comninellis, Lassine Ouattara

The removal or breakdown of org. compds. from wastewater is an important and integral part of any industrial chem. process. Described here is the electrochem. treatment (or pretreatment prior to biol. treatment) of industrial wastewater (BASF wastewater) c ...

2004

Synthesis and characterization of thermoresponsive polymers, hydrogels and microgels, based on poly(N-substituted acrylamides)

Stimuli-responsive polymers have the unique property of undergoing a reversible phase transition. This property has attracted much interest for their application in the field of medicine and biotechnology, such as drug delivery systems. Linear polymers of ...

EPFL2004

Polymer flocculants with improved dewatering characteristics

Jutta Christine Wandrey, David Hunkeler

A high mol. wt. water sol. acrylamide based polymer having improved flocculating properties is provided. The polymer is prepd. by a process, in which a small quantity of a chain branching agent such as methylenebisacrylamide is added to the polymn. reactio ...

2003

Polymer flocculants with improved dewatering characteristics

Jutta Christine Wandrey, David Hunkeler

A high mol. wt. water sol. acrylamide based polymer having improved flocculating and dewatering properties is provided. The polymer is prepd. by a process in which a small quantity of a chain branching agent is added to the polymn. reaction mixt. continuou ...

(Ecole Polytechnique Federale De Lausanne (Epfl), Switz.).2002

Direct electrochemical oxidation of polyacrylates

Christos Comninellis

A promising elimination treatment of non-biodegradable org. pollutants is the direct electro-oxidn. The electrochem. elimination of polyacrylates by using B-doped diamond as anodic material was proposed. The complete elimination of org. contaminants was ob ...

2002

Polymer flocculents and preparation thereof

David Hunkeler

A high molecular weight water soluble graft copolymer having improved flocculating properties is provided. The backbone chain is a heteropolysaccharide comprising amino groups, in particular chitosan, grafted with one or more monoethylenically unsaturated ...

2002

Catalysis in prebiotic chemistry: Steps towards the RNA world

It is proposed that catalysis by minerals and metal ions had a central role in the steps that led to the origins of life. In particular, the formation of biopolymers in the presence of water requires catalysis to compete with hydrolytic reactions. Catalysi ...

2002

Inline conversion monitoring in MMA high solid content polymerization process

Thierry Meyer, Frédéric Lavanchy

Inline conversion measurements in chem. reactions are in general and esp. in polymn. reactions necessary for process monitoring and control. For polymn. monitoring, the sound propagation (UPV) can be related to the texture of the bulk with a high accuracy. ...

2001

A high throughput synthesis of aryl triflate and aryl nonaflate promoted by a polymer supported base (PTBD)

Jieping Zhu

A rapid synthesis of aryl triflate and aryl nonaflate was developed using 4-nitrophenyl triflate and 4-nitrophenyl nonaflate as perfluoroalkanesulfonyl transfer reagents in combination with polymer supported 1,5,7-triazabicyclo[4.4.0]dec-5-ene (PTBD). Simp ...

1999