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Sodium montmorillonite (Na bentonite) is the major constituent of freshwater drilling muds. The function of the drilling mud is to remove cuttings from the drill hole to keep formation fluids from penetrating into the drilling mud, to lubricate and cool the bit, and to build an impervious filter cake on the wall of the drill hole to prevent the penetration of …
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The depletion of onshore oil reserves along with a rapid increase in the global energy demand has driven the oil industry to explore and produce oil from deepwater fields. However, because of high salinity in the subsea formation, salt contamination is becoming one of the most critical challenges to bentonite water-based drilling fluids (BT-WDFs), …
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Volcanic Materials in Commerce and Industry. Jonathan Dehn, Stephen R. McNutt, in The Encyclopedia of Volcanoes (Second Edition), 2015. 5.1 Bentonite. Bentonite is an off-white montmorillonite clay formed from altered volcanic ash. It has a sheet-silicate structure and is especially notable for the way in which it absorbs and loses water and for its base …
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Bentonite clay is one of the oldest clays that humankind has been using from ancient times as traditional habits and remedies. In recent years researchers have found many applications of bentonite ...
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properties in water-based fluid systems. Due to its high swelling capacity, it provides ... SCD050 coating machine. Bentonite (45.16 g) was added to 600 ml
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Bentonite can be applied in the production of a variety of paints and coatings: Interior and exterior house paints. Multi-purpose …
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Development of bentonite supported adsorbent coating (BAC) Bentonite supported adsorbent coating (BAC) was prepared by mixing of bentonite, water-based paint and distilled water in 0.3: 2.5: 2.0 ratio. Water-based paint acts as a binder and consists of calcium carbonate, PVA, formalin, ammonia and hydrosol (Azha et al., 2015b).
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This study investigated the impact of various thixotropic agents (organically modified hectorite and bentonite clays) on water-based oligomer system rheology. Ingredients were evaluated to determine their influence on unreacted composite characteristics (viscosity and pigment suspension stability) and reacted film …
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Section snippets Theoretical approach. The theoretical basis for interpreting isothermal activation of bentonite in presence of sodium carbonate is provided by Karimi and Salem theory which describes the cation exchange capacity, C, with activation time, t, as follows [16]: C = C 0 exp (a t b) where C 0 is the cation exchange capacity of …
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Na-Bentonite, clay based thickening agent, is generally used to modify the viscosity of paints, since it is more eco-nomical and environmentally friendly compared to polymer …
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This study investigated the impact of various thixotropic agents (organically modified hectorite and bentonite clays) on water-based oligomer system rheology.
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Learn how BENTONE® Hectorite clay can enhance the performance of aqueous and non-aqueous formulations with its unique crystal morphology and rheological …
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As an important industrial material, bentonite has been widely applied in water-based drilling fluids to create mud cakes to protect boreholes. However, the common mud cake is porous, and it is difficult to reduce the filtration of a drilling fluid at high temperature. Therefore, this paper endowed bentonite with a thermo response via the …
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removing heavy metals from contaminated surfaces by using polyvinyl alcohol strippable coatings containing bentonite clay. Viscosity measurements, evaporation rate tests, …
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Rheology plays a major role both in production and application stages of paints. Na-Bentonite, clay based thickening agent, is generally used to modify the viscosity of paints, since it is more ...
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Due to their cost-effectiveness, low toxicity, and naturally renewable properties, bio-coagulants for water treatment are gaining popularity. In this context, four bio-coagulants were tested for their ability in turbidity reduction in a synthetic bentonite suspension: Opuntia ficus indica (OFI) and Moringa oleifera (MO) seeds, two well …
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In this paper, fumed silica (AEROSILR974), polyurethane thickener (BYK-6500) and polyurea thickener (BYK-420) were selected as the rheological additives of water-based coatings to improve the ...
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Summary. The rapidly increasing global oil/gas demand and gradual depletion of shallow reservoirs require the development of deep oil/gas reservoirs and geothermal reservoirs. However, deep drilling suffers from drilling‐fluid failures under ultrahigh temperature, which cause serious accidents such as wellbore collapse, stuck …
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Smectites such as bentonite are highly swellable expanding lattices which, through modification with organic alkyl groups, can be used to provide shear-thinning to aqueous and solventborne coatings. Related to these organoclays is Attagel® (attapulgite) which is a special composite of smectite and non-expanding acicular palygorskite that forms ...
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The cement manufacturing process causes environmental problems such as carbon dioxide emissions. Bentonite-cement-water glass grouting (BCG) is a grout with low environmental impact, designed to reduce the use of cement. The significance of this study is to explore the fundamental properties of BCGs with the bentonite contents of …
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Bentonite/modified bentonite composites show excellent adsorption performance. •. Composites are eco-friendly adsorbents for treating the wastewaters. •. …
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In this study, the direct intercalation of gemini ionic liquids (ILs) with different alkyl chains into the bentonite (BT) interlayer as a high-performance lubricating additive for base oil 500SN was investigated. The purpose of modifying BT with an IL is to improve the dispersion stability and lubricity of BT in lubricating oil. The dispersibility and tribological …
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This study investigated the impact of various thixotropic agents (organically modified hectorite and bentonite clays) on water …
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A series of modified bentonite (MBT)/polyurethane (PU) composites were synthesized from MBT, isocyanate, and soybean oil-based polyols by in-situ polymerization to coat urea granules for slowing nitrogen (N) release. Bentonite (BT) was modified by intercalation of polyethylene glycol inside the interlayer space, expanded the BT layer spacing and …
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The acting mechanism of organic bentonite prevents precipitation to change the rheological properties of a given system. Polyolefin particles reduce swelling and dispersion in non-polar solvents. It is applied on gel coatings and plays a key role in preventing sagging, especially baking sagging.
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In this work, the Na-bentonite (Na-BT) was ultrasonically treated by a series of non-ionic PEG surfactants, which was used as the filler of a castor oil-based polyurethane (PU) coating. Different from the commonly applied organic bentonite with improved surface hydrophobicity, the PEGs-modified Na-bentonite (MBT) materials …
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Bentonite clay is one of the oldest clays that humankind has been using from ancient times as traditional habits and remedies. In recent years researchers have found many applications of bentonite clay due to its various physio-chemical properties. In the present work, various physical and chemical properties of bentonite such as surface area, …
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To improve the anti-wear performances of drilling tools in geological prospecting, WC-10Co4Cr coating spayed via high-velocity oxygen-fuel (HVOF) was prepared on the 1045 steel substrate. Tribological behaviors of WC-10Co4Cr coatings in water-based drilling fluids with different contents of filter reducer and bentonite clay …
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Smectite, notably bentonite and hectorite clays, represent the most widely used inorganic rheology modifiers for solvent-based paints. Bentonite organoclay is most versatile while hectorite is more specifically preferred …
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DOI: 10.1016/J.ARABJC.2016.03.009 Corpus ID: 100664925; Water-based strippable coatings containing bentonite clay for heavy metal surface decontamination @article{Toader2016WaterbasedSC, title={Water-based strippable coatings containing bentonite clay for heavy metal surface decontamination}, author={Gabriela Toader and …
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