Product Overview:
Bentonite is an aqueous clay mineral dominated by montmorillonite. The montmorillonite structure is a 2:1 type crystal structure composed of two silicon oxide tetrahedrons sandwiched by an aluminum-oxygen octahedron, and certain cations exist due to the layered structure formed by the montmorillonite unit cell, such as Cu, Mg, Na , K, etc., and these cations and montmorillonite unit cell is not very strong, easy to be exchanged by other cations, it has better ion exchange. It has been applied in more than 100 sectors in the 24 fields of industrial and agricultural production, and there are more than 300 products, so people call it "universal soil."
Product Features:
(1) Electronegativity: Similar to the nature of colloidal particles, the surface of particles of bentonite is also charged. The reasons for charging are as follows: (1) The lattice static charge is replaced by the lattice replacement together with internal compensation displacement. 2 Bonds of bentonite will break in the aqueous medium, resulting in broken bonds at the end face and end charges resulting from the exit of Al3+ and OH- (or Al2O3) from bentonite octahedral sheets.
(2) Adsorptivity and ion exchange: Due to the isomorphous isotopic substitution, the unit cell of bentonite becomes a large negative ion group; in addition, due to the special structure of bentonite, it has a large specific surface area and pore volume. The specific surface area can reach 750m2/g. Therefore, it has strong adsorption to some cations and polar molecules. The cations adsorbed between the layers are connected by a common oxygen atom and ion exchange with other metal cations under certain conditions.
(3) Stability and non-toxicity: Bentonite is resistant to high temperature of 300°C, free water and adsorbed water can be evolved at 140°C, interlaminar water is escaped at 300°C, crystal water is lost at 500°C, and has good thermal stability. Basically insoluble in water, slightly soluble in strong acids and alkalis, it is not destroyed by strong oxidants or strong reducing agents at room temperature, and has good chemical stability. Bentonite is non-corrosive to humans, animals and plants, non-toxic and non-irritating, and therefore can be used as a carrier for medicine, a feed additive, a soil improvement and fertilizer carrier, and can be used as a food additive.
(4) Adhesion and thixotropy: This characteristic comes from many aspects, such as hydrophilicity of bentonite, fine particles, diversification of crystal surface charge, irregularity of particles, formation of hydrogen bonds between hydroxyl groups and water, etc. The particles are in aqueous medium. In the cross-linking of each other to form a continuous network structure, can form solutions or gels. When an external force or stirring is applied, the sol or gel has good fluidity and lubricity, and self-recovers the gel-like state when stirring is stopped.
(5) Hydrophilicity and swellability: The oxygen layer and the oxygen layer between the crystal layers of the bentonite in the c-axis direction are combined with van der Waals forces. The bond energy is very weak, and a good dissociation surface can be formed. The interlayer is easy to invade water molecules or Other polar molecules cause expansion in the c-axis direction; at the same time, the unit cell has many metal cations and hydroxyl-hydrophilic groups, and therefore it exhibits strong hydrophilicity. Some bentonite can adsorb 5 times its own mass of water, and its volume can expand to 20-30 times before water absorption.
Product Categories:
The type of bentonite determines the type of bentonite between the layers of bentonite. When the interlayer cation is Na+, it is called sodium bentonite; when the interlayer cation is Ca+, it is called calcium bentonite; when the interlayer cation is H+, it is called hydrogen bentonite (active clay); Organic cations are called organic bentonites.
1. Hydrogen bentonite (activated clay)
Activated clay is an adsorbent made of clay (mainly bentonite) as raw material, inorganic acidified, and then rinsed and dried. Its appearance is milky white powder, odorless, odorless, non-toxic, and has strong adsorption performance. Colored substances, organic substances. Easy to absorb moisture in the air, place it too long will reduce the adsorption performance. However, heating above 300 degrees Celsius starts to lose crystal water, which is a structural change that affects fading. Activated clay is insoluble in water, organic solvents, and various oils. It is almost completely soluble in caustic soda and hydrochloric acid. The relative density is 2.3 to 2.5, and swelling in water and oil is minimal.
2, organic bentonite
Organic bentonite is an inorganic mineral/organoammonium composite. It uses bentonite as raw material and utilizes the lamellar structure of montmorillonite in bentonite and it can swell and disperse into colloid-like clay particles in water or organic solvents, through ion exchange. Technology made by inserting organic covering agents. Organic bentonite can form gels in various organic solvents, oils, liquid resins, has good thickening, thixotropic, suspension stability, high temperature stability, lubrication, film formation, water resistance and chemical stability There are important application values ​​in the coating industry. In the paint ink, aviation, metallurgy, 'chemical fiber, petroleum and other industries also have a wide range of applications.
3, bentonite mine
Bentonite is a multi-purpose mineral, and its quality and application mainly depend on its montmorillonite content and its type and its crystal chemistry. Therefore, its development and utilization must vary from mine to mine, depending on the role. Such as the production of activated clay, calcium to sodium, drilling grouting for oil drilling, instead of starch for spinning, printing and dyeing, building materials with internal and external wall coatings, preparation of organic bentonite, bentonite synthesis of 4A zeolite, production White carbon and so on.
4, salt bentonite
Seawater pulping and salt-resistant bentonite are not limited by the geographical location of the environment, and they can be used on the spot without being constrained by weather conditions. They can be used at any time. The salt-resistant bentonite solves the disadvantages of excessive filtration loss (140-160ml) of other salt-resistant bentonite, and its fluid loss is not more than 14ml. It has the advantages of fast dissolving speed, strong hydration capacity, high pulping rate, thin mud, strong stability, high solid wall capacity, small rotary resistance, and high drilling rate. In particular, when the sediment layer and salt layer are encountered during construction, its strong inhibition can prevent collapse, prevent the diameter of the well from expanding, and reduce the difficulty of starting and exiting the drilling process, not drilling in the end, stuck drilling, etc. occur.
Applications:
Because of its good physical and chemical properties, bentonite is known as "universal" clay and can be used as a binder, suspending agent, thixotropic agent, stabilizer, purification decolorant, filler, feed, catalyst, etc., widely used in a wide range of It is used in oil extraction, directional crossing, iron and steel casting, metallurgy pellets, chemical coating, compound fertilizer, sizing, rubber, plastics, papermaking, purified water, moisture absorbent, pesticides and other fields.
Digital Luggage Scale Digitial LCD Display Backlight Baggage Scale with 110lbs Capacity, Portable Stainless Steel Hanging Luggage Weight Scale with Tare Function for Travelers - Silver
- [IDEAL FOR TRAVELERS] Lightweight and compact, you can carry it everywhere you go and avoid overweight bags.
- [SIMPLE OPERATION] The Portable Luggage Scale is straightforward and easy to use. Push button to switch measurement units between g, oz, kg, lbs. Push button under load to use tare, and again to reset scale back to zero.
- [110-lbs MAX CAPACITY] The luggage weight scale has 110-lb weight capacity, allowing you to use it for even those oversized bags. The large digital screen allows you to read the luggage scale from a distance, making weighing your back easier.
- [BATTERY AND OVERLOAD INDICATOR] The digital Tracker Portable Luggage Scale, with its built-in battery and overload indicator, alerts you when the battery is low or your bag is over the maximum weight limit.
Package Includes
- 2x Digital Luggage Scale
- 2x CR2032 Battery
- 1x User Manual
Specifications
- Weight Capacity: 110lb (50kg)
- Scale Functions: Zero, Tare
- Unit Measurements: g/ oz/ kg/ lb
- Power: 1x 3v Lithium Cell (CR2032)
Luggage Scale,Portable Luggage Scale,Terminal 2 Portable Luggage Scale,Tracker Portable Luggage Scale
NINGBO NEWMORE IMP. & EXP. Co., LTD. , https://www.zjnewmore888.com