BENTONITE (SODIUM FORM)
Bentonite powder
CAS: 1302-78-9
Molecular Formula: Al2O3.4(SiO2).H2O
BENTONITE (SODIUM FORM) - Names and Identifiers
| Name | Bentonite powder |
| Synonyms | Bentonite BENTONITE pengruntu Bentonites Diosmectite FULLERS EARTH Lecithinase C BENTONITE MAGMA MONTMORILLONITE Bentonite powder KWK KRYSTAL KLEAR albagelpremiumusp4444 BENTONITE (SODIUM FORM) nitrilotriethane-2,1-diyl trinitrate |
| CAS | 1302-78-9 |
| EINECS | 215-108-5 |
| InChI | InChI=1/C6H12N4O9/c11-8(12)17-4-1-7(2-5-18-9(13)14)3-6-19-10(15)16/h1-6H2 |
BENTONITE (SODIUM FORM) - Physico-chemical Properties
| Molecular Formula | Al2O3.4(SiO2).H2O |
| Molar Mass | 360.31 |
| Density | 2~3g/cm3 |
| Boling Point | 381.8°C at 760 mmHg |
| Flash Point | 184.7°C |
| Water Solubility | Insoluble in water and forms a colloidal solution. |
| Solubility | Practically insoluble in water and in aqueous solutions. It swells with a little water forming a malleable mass. |
| Vapor Presure | 4.93E-06mmHg at 25°C |
| Appearance | Solid |
| Color | Light yellow or green, cream,pink, gray to black solid |
| Exposure Limit | ACGIH: TWA 1 mg/m3 |
| Merck | 14,1055 |
| Storage Condition | Room Temprature |
| Stability | Stable. |
| Refractive Index | 1.503 |
| MDL | MFCD00130611 |
| Physical and Chemical Properties | Traits are generally white, light yellow, due to changes in iron content and light gray, light green, pink, brown red, brick red, gray-black and so on. relative density 2-3g/cm3 |
| Use | Used for iron concentrate pellets, drilling mud, casting sand Binder, animal and vegetable oil decolorization, purification agent, plastic filler, desiccant, adsorbent, etc |
BENTONITE (SODIUM FORM) - Risk and Safety
| Risk Codes | R20/22 - Harmful by inhalation and if swallowed. R8 - Contact with combustible material may cause fire |
| Safety Description | S22 - Do not breathe dust. S24/25 - Avoid contact with skin and eyes. |
| WGK Germany | 3 |
| RTECS | CT9450000 |
| TSCA | Yes |
| Toxicity | LD50 intravenous in rat: 35mg/kg |
BENTONITE (SODIUM FORM) - Upstream Downstream Industry
| Raw Materials | White mineral oil (petroleum) Sodium carbonate |
| Downstream Products | montmorillonite K 10 |
BENTONITE (SODIUM FORM) - Reference
| Reference Show more | 1. [IF=2.678] Jianming Zhang et al."Adsorption of plantaricin Q7 on montmorillonite and application in feedback regulation of plantaricin Q7 synthesis by Lactobacillus plantarum Q7."Eng Life Sci. 2019 Jan;19(1):57-65 2. [IF=3.352] Yu Li et al."DIETARY FIBERS WITH DIFFERENT VISCOSITY REGULATE LIPID METABOLISM VIA AMPK PATHWAY: ROLES OF GUT MICROBIOTA AND SHORT-CHAIN FATTY ACID."Poultry Sci. 2022 Jan;:101742 |
BENTONITE (SODIUM FORM) - Nature
Open Data Verified Data
bentonite is a water aluminosilicate mineral containing a small amount of alkali metals and alkaline earth metals, and its main mineral composition is montmorillonite, with a content of 85% ~ 90%, some properties of bentonite are also determined by montmorillonite. In addition, it also contains a small amount of kaolinite, hydrate aluminum Stone, chlorite, Opal, mica and other minerals. Bentonite is odorless, tasteless, very fine, and has a mixed-color appearance. Generally white, light yellow, due to changes in iron content and light gray, light green, pink, brown red, brick red, gray-black and so on. Insoluble in water and organic solvents. The specific gravity is 2.4~2.8, the melting point is 1330~1430 ℃, bentonite has strong hygroscopicity, can absorb the water equivalent to its own volume 8~20 times and expand to 30 times; in the aqueous medium can be dispersed in colloidal suspension, and has a certain viscosity, thixotropy and lubricity, IT and sediment and other blends with plasticity and adhesion, it has strong cation exchange capacity and adsorption capacity.
Last Update：2024-01-02 23:10:35
BENTONITE (SODIUM FORM) - Preparation Method
Open Data Verified Data
bentonite mineral processing method is generally divided into two kinds of dry and wet
- dry beneficiation is generally used to treat bentonite with good quality. The method is to dry the raw ore by drying, natural air drying or drying with dry Kang, drying furnace, first with artificial or jaw crusher crushing, and then lemon grinding and other roller grinding machine grinding into 100 mesh, 150 mesh, 200 mesh grade products.
- wet beneficiation is generally used to treat low grade bentonite with a montmorillonite content of 30% to 80%. The method is to crush the raw ore to a particle size of less than 50mm, add water to make a suspension, and classify it in a hydraulic separator, and concentrate the obtained fine grade concentrate in a precipitator, after drying in a dryer and grinding, a product suitable for drilling mud grade can be obtained.
bentonite modification: including the preparation of calcium bentonite, activated clay and organic bentonite
- bentonite sodium is also divided into two kinds of dry and wet. The dry method is to add a sodium-containing reagent (generally sodium carbonate) to calcium-based soil, and convert it into sodium-based bentonite by mixing and extruding and Na-Ca displacement reaction. Wet Method is when the reagent is mixed with the soil, fully water mixing dispersion.
- (acidic (active) clay preparation also has two kinds of dry and wet. The wet method is to add hydrochloric acid (or sulfuric acid), water and dispersant before mixing and extruding into strips, and fully stir and disperse; The dry rule is only to add hydrochloric acid (or sulfuric acid) and then fully stir.
- The organobentonite is obtained by adding a sodium-based bentonite to an ethylene glycol solution of an organic amine salt, followed by high-speed stirring and displacement reaction.
Last Update：2022-01-01 09:07:25
BENTONITE (SODIUM FORM) - Introduction
Bentonite (bentonite) is a natural colloid hydrated aluminum silicate. No smell. Slightly earthy. It is insoluble in water and organic solvents, but can absorb 12 times the volume of water and swell; it does not swell in organic solvents.
Last Update：2022-10-16 17:13:08
BENTONITE (SODIUM FORM) - Use
Open Data Verified Data
In metallurgy, casting, drilling, chemical, food and other fields as a binder, adsorbent, Catalyst, thickener, thixotropic agent, decolorant. It can be used as soil conditioner, feed additive and pesticide carrier in agriculture. It is used as a purifying agent for fruit juice and wine in food industry. Organic bentonite is used as lubricating oil thickener, anti-settling agent of paint, ink and coating, oil-water slurry of high temperature deep well, thickening agent and stabilizer of latex coating, cosmetics, etc.
Last Update：2022-01-01 09:07:25
BENTONITE (SODIUM FORM) - Safety
Open Data Verified Data
toxic; Rats were injected intravenously with LDsa:35mg/kg. The dust can stimulate the nasal cavity, throat, lungs, eyes, long-term inhalation can cause bronchial asthma.
Last Update：2022-01-01 09:07:26
BENTONITE (SODIUM FORM) - Reference Information
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| bentonite | bentonite, also known as bentonite, bentonite, is a kind of clay or clay rock with montmorillonite as the main mineral component. The name given by the American scholar W.C.Knight in 1898 when he studied the Cretaceous argillaceous rocks near Wyoming, USA. Bentonite is mainly composed of hydrous aluminosilicate minerals. In addition to the main mineral montmorillonite, it also often contains clay minerals such as illite, kaolinite, chlorite, halloyle, and beidite. The associated components include zeolite minerals and calcite, quartz, and feldspar, Glass debris, cuttings, etc. The main chemical components of bentonite are silica, aluminum oxide and water, magnesium oxide and iron oxide, as well as calcium, sodium, potassium, etc. Montmorillonite is an aqueous aluminosilicate containing a small amount of alkali and alkaline earth metal ions. The unit cell of montmorillonite is two silicon-oxygen tetrahedral layers with a hydrogen-oxygen octahedral layer. The cation heterovalent homoimage substitution makes it charge and has various characteristics such as adsorption and cation exchange. Bentonite can be divided into different properties according to the type of exchangeable cations and layer charge size of montmorillonite, such as sodium, calcium, magnesium, aluminum, etc., and each property can also transition from each other, that is, natural modification. People use this feature to artificially modify bentonite as needed in production. Fig. 1 is sodium calcium bentonite |
| classification | 1. according to color, it can be divided into gray-white, brown and variegated bentonite ore; 2, according to its properties and industrial uses, it can be divided into sodium-based, calcium-based and sodium-based bentonite ore. 3. bentonite can be divided into two categories according to water absorption. the first category can absorb a large amount of water and expand greatly after absorbing water. It is maintained in suspension in a thin water dispersant. This type of clay is mostly used as a plasticizer for ceramics. It can increase the drying strength and firing temperature of the porcelain blank and reduce the adsorption effect. The second type of bentonite can only adsorb slightly more water than ordinary plastic clay or bleaching soil, and its expansion is not significant, and it precipitates quickly in the thin water dispersant. This kind of bentonite is widely used as a clear clay, used in chemical, pharmaceutical, food decolorant, purifier, pesticide carrier and graphite crucible, enamel glaze regulator and binder, and the manufacture of construction clay products. |
| color | bentonite has milky white, white, light yellow, yellow, brown, pink, light green, light cyan, gray, etc. Usually, milky bentonite with a density of 2.4~2.8 is used, with a melting point of about 1 330~1 430 ℃ and extremely fine particles. It can adsorb water better than ordinary clay and play an alkali exchange role better than kaolin. After absorbing water, the volume increases to form a gel-like substance. It can adsorb water 5 times its weight, and its volume will expand 15 times. After adding water to form a colloidal solution, it can be suspended for a long time. After drying, water can be added to expand again, and repeated treatment does not affect its performance. In short, bentonite has the properties of water absorption, expansion, adhesion, suspension, plasticity and fire resistance. Information on the product characteristics, physical and chemical properties, classification, color, resource distribution, cause and composition, industrial use of non-metallic mineral bentonite is edited by Yao Yao. |
| Resource Distribution | The world's bentonite resources are mainly distributed in (1) Canada, the United States, Mexico, Peru, Japan, South Korea, the southeast coastal areas of China and the Philippines in the Pacific Rim metallogenic belt; (2) Spain, France, Italy, Greece, Turkey, Turkmenistan, Uzbekistan, Kyrgyzstan, Tajikistan, Kazakhstan, Xinjiang, Gansu and other places in the Mediterranean metallogenic belt; (3) India, Pakistan, Iran, Iraq, Sudan, Tanzania, Mozambique, South Africa, Myanmar, Indonesia and western Australia in the metallogenic belt around the Indian Ocean. Among them, Wyoming, South Dakota, North Dakota, Montana, Sardinia, Italy, Milos, Greece, Turkmen Ogranre, Askan, Georgia, Suri Fienhe, Armenia and Gujarat, India, are all world-famous bentonite deposits. Wyoming and South Dakota are the main producing areas of sodium bentonite. China's bentonite deposits are mainly distributed in Heilongjiang, Jilin, Liaoning, Jiangsu, Zhejiang, Shandong, Fujian, Guangdong, Guangxi and other provinces. Xinjiang, Gansu, Shaanxi, Jiangxi, Sichuan, Henan, Anhui and other places also have large-scale high-quality bentonite deposits. Among them, the bentonite resources in the three northeastern provinces (especially Jilin Province) and Guangxi are not only large in reserves and excellent in quality, but also mainly sodium bentonite, which is an important bentonite producing area in China. They mainly occur in the Jurassic and Tertiary coal-bearing rock series. |
| genesis and composition | bentonite has different genesis and composition, resulting in changeable ore color, complex structure and different structure. the quality of bentonite mainly depends on the content, properties and beneficial and harmful components of montmorillonite. Because of its good physical and chemical properties such as adhesion, adsorption, catalysis, suspension, dispersion, thixotropic and cation exchange, bentonite is often used in industry as binder, adsorbent, absorbent, filler, catalyst, thixotropic agent, flocculant, detergent, stabilizer, thickener, etc., widely used in metallurgical pellets, casting sand, drilling mud, grease decolorization, chemical industry, papermaking, rubber, medicine, agriculture and forestry and other industries. fig. 2 is a reference index for bentonite quality. the genesis of bentonite can be divided into three categories: weathering residue type, sedimentary-diagenetic type and hydrothermal alteration type. Bentonite occurs in the Jurassic, Cretaceous and Tertiary strata of the Middle and Cenozoic, and a few are produced in the Carboniferous to Permian strata of the Paleozoic. |
| industrial use | bentonite is mainly used as thickener and anti-precipitation agent for coatings and inks in industry. (1) bentonite is used as binder to form iron pellets, which are directly put into blast furnace for smelting instead of sintering method, which can save 10% ~ 15% of flux and coke and improve blast furnace production capacity by 40% ~ 50%. (2) drilling mud prepared with sodium bentonite has high pulping rate and many other advantages, and is suitable for oil drilling, high pressure jet wells, small diameter drilling and unstable formation drilling. (3) using sodium bentonite as casting sand binder can strengthen the sand resistance and solve the problem of sand collapse. (4) bentonite can be used as pesticide carrier and diluent, oil and oil purification and decolorizing agent, wine and sugar industry clarifier and purifier. In the past ten years, many new uses of bentonite have been developed. in coal mine production, the roadway excavated in bentonite is easy to expand and deforms or even blocks the roadway, which is not easy to support. |
| toxicity | ADI is not specified (FAO/WHO,2001). GRAS(FDA,§ 184.1155,2000). |
| usage limit | is not restricted, GMP is the limit, and the food is not left in the end. (FDA,§184.1155,2000) |
| use | GB 2760-96: processing aid. Purifying agent; anti-caking agent; suspending agent; emulsifier. Mainly used for the clarification of wine; a filter aid for suspended yeast in draft beer. It can effectively adsorb proteins, pigments and positively charged colloidal ions to produce condensation. When in use, add 10 times the amount of water to make it fully swell, stir into a slurry and add it to the juice to be treated, stir and disperse evenly, and filter after 0.5~1.0h. Bentonite can be used as a binder, adsorbent, filler, thixotropic agent, flocculant, detergent, stabilizer, thickener, etc., used as a carrier for fertilizers, fungicides and pesticides, rubber and plastic fillers, anti-settling additives for synthetic resins and inks, thixotropic and thickening of pigments and puree coatings, additives for daily chemicals, sorbents and adhesives for medicine, etc, it is also widely used in petroleum, metallurgy, casting, machinery, ceramics, construction, light industry, paper making, textile and food sectors. Used as emulsifier and adsorbent for proteins and particles in biochemical research, oil emulsifier. decolorant. |
| production methods | mining methods include open-pit mining and underground mining, mainly open-pit mining. Open-pit mining process: The main mining methods for underground mining are the room column method, the empty field method and the layered caving method, and the process is: the beneficiation method is generally selected directly by hand during mining. It is made by mining, crushing, grinding and drying. |
| category | toxic substances |
| toxicity classification | highly toxic |
| acute toxicity | intravenous-rat LD50: 35 mg/kg |
| flammability hazard characteristics | non-combustible; injection of it can cause blood coagulation |
| storage and transportation characteristics | ventilation and low temperature drying |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-09 21:21:28
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Raw Materials for BENTONITE (SODIUM FORM)
Downstream Products for BENTONITE (SODIUM FORM)