The deflocculation of kaolin suspensions - the effect of various electrolytes
نویسندگان
چکیده
The deflocculation effect of conventional additives to kaolin suspensions is evaluated from the results standard rheological measurements. Several widely used electrolytes (NaOH, Na2C03, Na2Si03, SHMP = sodium hexametaphosphate, and CMC = sodium salts of carboxymethylcellulose) have been tested. The optimal concentrations of these deffloculants, in respect to reaching the maximum reduction of initial suspension viscosity, are found. The stability of deflocculated kaolin suspensions against sedimentation is evaluated and different aspects of the observed flow enhancement discussed. Inorganic electrolytes are found to be more effective in viscosity reduction, but on the other hand, low-molecular organic CMC additives produce more stable final suspensions.
منابع مشابه
Deflocculation of Cellulosic Suspensions with Anionic High Molecular Weight Polyelectrolytes
Pulp fibers have a strong tendency to form flocs in water suspensions, which may cause their undesirable distribution in the paper sheets. This flocculation can be controlled by adding, e.g., an anionic high molecular weight polyelectrolyte in the fiber suspension. The objective of this study was to investigate the effect of anionic polyelectrolytes on deflocculation kinetics, dewatering, and r...
متن کاملPreparation of Poly-N-Methylpyrrole Coated Platinum Modified Electrode in Chloroform in the Presence of Various Supporting Electrolytes and Its Use for the Catalytic Oxidation of Ascorbic Acid and Hydroquinone
The electrochemical preparation of poly-N-methylpyrrole (PMPy) coated platinum electrode in chloroform in the presence of tetrabutylammonium Perchlorate, hexafluorophosphate, hydrogensulphate, Periodate and Iodide as supporting electrolytes was performed. The influence of electrosynthesis method, dopant anion type and operation temperature on electrochemical behavior of polymer were demonst...
متن کاملEffect of Kaolin Application on Water Stress in Pistachio cv. „Ohadi‟
Effects of kaolin applicati on were evaluated on water stress in pistachio cv. ‘Ohadi’. This experiment was conducted in one of research sites at the Pistachio Research Institute in Rafsanjan (Kerman province) in . The results show that individual and interaction effects of all treatments were significant on nutrition absorption in leaves, although there was not a steady effect on all the eleme...
متن کاملInhibitory effects of curcumin, lawsonia, and ginger on kaolin induced paw edema in the rat
Background: Curcumin is yellow pigment of tumeric, and, that is extracted from it lawsonia (2-hydroxy 1,4 naphtoquinon) is a natural product and it is extracted from henna. Ginger is a dried rhizomes gained from a plant called zingiber officinalea, which is extracted from the family of ginger. Material and Methods: This experimental study performed on adult male rats. Acute inflammatory edema ...
متن کاملEffect of Islamic fasting on body weight, blood pressure, electrolytes, blood cell count and certain serum biochemical variables in males
The objectives of this study were to Investigate the changes in blood pressure ( systolic and diastolic) , serum lipids , glucose, electrolytes, blood cell count and weight during Ramadan fasting in apparently healthy muslem men. Eighty male college students or staffs were followed in 3 stages during the month of Ramadan. Blood pressure, weight and height were measured on day one ( baseline) ,a...
متن کامل