Impact of heating method on the flocculation process using thermosensitive polymer.
The impact of suspension heating method on the flocculation process using thermosensitive polymer is reported in this paper. In experiments a model suspension of chalk in RO water (purified by Reverse Osmosis) was destabilized using a copolymer of N-isopropylacrylamide (NIPAM) and cationic diallyldimethyl ammonium chloride (DADMAC). The measurements were made using a laboratory setup consisting of a mixing tank with four baffles, Rushton turbine, laser particle sizer Analysette 22 by Fritsch and a system of pump and thermostating devices. Two different modes of heating were used. In the first case the temperature of the system was gently raised above the Lower Critical Solution Temperature (LCST) using an electrical heater placed inside the tank, while in the second case the system temperature was rapidly raised by an injection of hot water directly into the tank. It was proven that heating method as well as the polymer concentration was crucial to the shape and size of created flocs.
Department of Chemical and Process Engineering, Faculty of Chemistry, Silesian University of Technology, ul. ks. M. Strzody 7, 44-100 Gliwice, Poland. Marcin.Lemanowicz@polsl.pl
Marcin
M
Lemanowicz
Wojciech
W
Kuźnik
Mirosław
M
Gibas
Grzegorz
G
Dzido
Andrzej
A
Gierczycki
D000178:Acrylamides / Q000737:chemistry / Q000494:pharmacology; D000498:Allyl Compounds / Q000737:chemistry / Q000494:pharmacology; D002119:Calcium Carbonate / Q000737:chemistry*; D005427:Flocculation / Q000187:drug effects; D006361:Heating / Q000379:methods*; D008956:Models, Chemical; D015394:Molecular Structure; D011108:Polymers / Q000737:chemistry* / Q000494:pharmacology; D000644:Quaternary Ammonium Compounds / Q000737:chemistry / Q000494:pharmacology; D013535:Suspensions; D013696:Temperature; D014867:Water / Q000737:chemistry*
D000178:Acrylamides; D000498:Allyl Compounds; D011108:Polymers; D000644:Quaternary Ammonium Compounds; D013535:Suspensions; D014867:Water; C508190:diallyldimethylammonium chloride; C067295:N-isopropylacrylamide; D002119:Calcium Carbonate