Hydrophobically modified cationic polyelectrolytes

Novel biodegradable flocculanting agents based on pullulan

“…They are available in all three forms, i.e. cationic, anionic and nonionic and may be synthetic (acrylic acid polymers and copolymers, styrene sulfonate polymers and copolymers, maleic acid copolymers with nonionic monomers, derivatives of phenol-formaldehyde resin; polyalkyleneimine and polyhydroxyalkyleneamine, diallyldimethylammonium chloride polymers and copolymers; polymers and copolymers of quaternized tertiaryaminoalkyl esters and amides with acrylamide, poly(1-aminoethylene) such as polyvinylamine (PVAm) and related polymers) [2][3][4][5][6] and natural (ionic derivatives of gum guar, starch, dextran, chitosan) [7][8][9][10][11]. Synthetic flocculants are more performant than the natural ones, requiring lower polymer dose to obtain an efficient flocculation.…”

Chemical destabilization of oil-in-water emulsion by novel polymerized diethanolamines

“…Inorganic emulsion breakers might be aluminum sulfate, aluminum chloride [7], or ferric chloride [8]. The polyamine type strongly cationic emulsion breakers give the treated water improved quality in breaking O/W emulsions [9,10]. The present investigation is concerned with the synthesis and evaluation of novel emulsion breakers (D 3 -D 7 and D 9 ).…”

Solution properties of a hyamine based on N,N‐dimethyl diallyl ammonium chloride–acrylamide copolymer

“…[1][2][3][4][5] Although there have been numerous studies concerned with the solution property of polyelectrolytes, 6 most of the attention has focused on anionic polymers. Because cationic polymers were usually dissolved in water when used as flocculating agents, the present investigators believed it necessary to understand the solution property and behavior of cationic polymers.…”