An explanation of flocculation using Lewis acid-base theory

Book · Fri Jan 01 00:00:00 EST 1988

OSTI ID:6504642

Brown, P M; Stanley, D A; Scheiner, B J

This paper describes a Bureau of Mines-devleoped method of dewatering clay slurries based on flocculation by high-molecular-weight polymers and water removal from the formed flocs using a trommel or hydrosieve. The exchange ion on the clays affects their dewaterability. Metal ions in solution and on the exchange sites of smectite clays are known to act as Lewis acids. Recent work has determined that these ions can be titrated with high-molecular-weight polymers. The relative acidity of the exchange ion and the basicity of the polymer determined by the new method give insight into the dewatering mechanism.

• OSTI ID: 6504642
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CLAYS
FLOCCULATION
ION EXCHANGE
LEWIS ACIDS
METALS
POLYMERS
SLURRIES
TITRATION
WATER REMOVAL
DISPERSIONS
ELEMENTS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
MIXTURES
PRECIPITATION
REMOVAL
SEPARATION PROCESSES
SUSPENSIONS
400201* - Chemical & Physicochemical Properties