Bentonite is an important component of drilling fluid whose quality directly affects the safety and economic benefits of water based drilling fluid In order to effectively cope with temperature changes the development of temperature sensitive modified bentonite is of great significance In this study a temperature sensitive modified bentonite based on NIPAM
The influence of the grinding time of raw bentonite the dispersant dosage in bentonite dispersion and the centrifugal speed on the purification of bentonite were investigated Results indicate
At pH Fig 10b the dispersion of Na/Ca bentonite shows no definite yield stress and flow is slightly plastic with a very small hysteresis Increasing pH causes the particles to disintegrate In contrast to Newtonian flow of the dispersion of homoionic sodium montmorillonite at pH = the plastic char acter of the flow curve is very
Ultrasound induced adsorption of SMC on bentonite and ultrasound induced dispersion of bentonite clay particle are responsible for the improvement Adsorption experiments by TOC FTIR and TGA as well as particle size analysis displayed that adsorption quantity of SMC on clay increased with introduction of ultrasonic oscillations due to acoustic
The pure bentonite dispersions were prepared by adding bentonite slowly to deionized water under magnetic stirring conditions to avoid the formation of aggregates and ensure homogeneous dispersion In the case of bentonite surfactant dispersions the surfactant solutions × 10−3 M International Journal of Chemical Engineering and
The SDS surfactant was effective in modifying the rheological behavior of bentonite dispersion in the concentration range that corresponds to critical micelle concentration CMC and critical coagulation concentrations CCC of SDS On the other hand the addition of CTAB surfactant to bentonite suspension reduced significantly its viscosity
The present study reports the effect of anionic surfactant sodium dodecyl sulfate SDS C12H25 OSO3Na upon the electrokinetic electrophoretic mobility zeta potential and rheological viscosity yield value properties of the Ca bentonitic clay found in Turkey and its Na activated form The SDS dispersant was added in different concentrations in the range of 1 ×
Nanoscale bentonite nm has been obtained by ultrasonic bentonite dispersion It is found that nanoscale bentonite significantly differed from bentonite in the shape size and size distribution of the particles The optimal administration of nanoscale bentonite in the body of white mice is shown to be oral injection We present data on the acute oral toxicity
The films from the dispersion containing bentonite were subjected to consistometric tests and the coatings containing the ionic liquid applied on the glass plates were subjected to water extraction at room temperature for 24 h Then spectrophotometric tests of the aqueous solutions were performed with the use of the Agilent Technologies
Firstly bentonite dispersion with a fixed dosage of 2 w/v% was prepared Secondly while continuing to stir at 8000 r/min a certain quality of additives was cooperated slowly with 300 mL bentonite dispersion according to the formula the mass/volume concentration After each additive was added the stirring process was continued for 20 min
temperature control during organoclay dispersion in solvent based systems is not as important as with organic thixotropes Various methods used in manufacturing formulations and procedures sometimes suffer in efficiency when order of addition and mixing conditions are less than optimum This leaflet will provide information and data
The bentonite dispersions showed Newtonian Bingham plastic and shear thinning behaviors depending on the solid concentration and bentonite type Although all bentonite dispersion exhibited a thixotropic behavior the Na bentonite showed a greater degree of thixotropy which was two order of magnitudes greater than that of Ca bentonite
Laponite® LAP is an intensively studied synthetic clay due to the versatility given by its layered structure which makes it usable in various applications This review describes the multifaceted properties and applications of LAP in aqueous dispersions and gel systems The first sections of the review discuss the LAP structure and the interactions between clay discs in
After dispersion process and ensuring of dispersion soils were chemically stabilized with different salts To test the effect of anion and cation type on stability of various clay soil samples CaCl 2 AlCl 3 Al 2 SO4 3 and CaSO 4 were chosen and evaluated with 3 % of cation concentration at optimum moisture content for a period of one
to further investigate the dispersion performance of modified bentonite at high temperature and high pressure by testing the gelling value this property is an important indicator of
Ethyl cellulose EC was filled with bentonite Bent particles by mechanical dispersion to produce composite film materials that were studied using various methods According to X ray diffraction XRD analysis the inter chain separation length was larger in EC/Bent composite then those in pure polymer Infrared spectrometry indicated a formation of
Dispersion into the colloidal state requires the transformation of the original bentonite into the sodium form for instance by soda activation Therefore we review here the coagulation of sodium montmorillonite dispersions by inorganic and organic cations and the influence of compounds of practical interest such as phosphates cationic and
induced adsorption and dispersion of bentonite technology combined with existing ltrate reducers provides an inno vative route to enhance uid loss properties of water based drilling uids So far no correlative work has been reported Sulfonated wood coal SMC is commonly synthesized from the reaction of wood coal formaldehyde and sulfonat
In order to benefit from bentonite s material characteristics the bentonite particles/ platelets must be uniformly distributed into a base medium Bentonite dispersions have a high swelling capacity and can adsorb a high amount of fluid When dispersed into a liquid the bentonite dispersion forms a highly thixotropic colloidal suspension or
Ethyl cellulose EC was filled with bentonite Bent particles by mechanical dispersion to produce composite film materials that were studied using various methods According to X ray diffraction XRD analysis the inter chain separation length was larger in EC/Bent composite then those in pure polymer Infrared spectrometry indicated a formation of
For instance the apparent viscosity of the 2 wt% laponite dispersion underwent changes between 22 and 24 mPa s after hot rolling at 180 240 °C for 16 h Compared to existing mud making materials laponite exhibited better mud making properties Bentonite is the most important ingredient of water based drilling fluids It is used as a
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