Light weight aluminum hydroxide (Aluminiumhydroxide), chemical formula Al(OH)3, white strong, insoluble in water, soluble in acid or antacid, is a common amphoteric hydroxide. After it is warmed and also dried out airborne, it can be converted into alumina, which is of great relevance to the manufacturing of alumina. Light weight aluminum hydroxide can react with acid to create salt as well as water, and also can react with strong base to form salt and water, so it is an amphoteric hydroxide. As a result of its specific level of acidity, it can additionally be called aluminate (H3AlO3). Nevertheless, what is actually created when it reacts with a base is tetrahydroxyaluminate ([ Al(OH)4] -). Therefore, it is generally considered as metaaluminate monohydrate (HAlO2 · H2O), which is divided right into two kinds: commercial quality as well as pharmaceutical quality.
Light Weight Aluminum Hydroxide Otc is a chemical product with a variety of uses. Industrial quality light weight aluminum hydroxide is mostly made use of as filler for plastics as well as polymers, fire resistant as well as binder for carpeting making, filler for epoxy resin, and also color filler for paper making. As well as coatings, manufacturing of aluminum sulfate, alum, aluminum fluoride, sodium aluminate, artificial molecular screens, production of fillers for toothpaste, ingredients for glass, its gel liquid as well as completely dry gel. Pharmaceutical quality Light weight aluminum Hydroxide Otc is primarily used as an antacid. It can neutralize gastric acid and safeguard the ulcer surface. It can ease the signs of heartburn caused by hyperacidity. It appropriates for stomach abscess and also duodenal ulcer, reflux illness. Treatment of esophagitis and upper stomach blood loss. When made use of in combination with calcium as well as vitamin D, it can deal with neonatal hypocalcemia (tetany).
Aluminum Hydroxide Otc Property
2980℃[at 101 325 Pa]
2.42 g/cm3 at 20 °C
<0.1 hPa (20 °C)
Store at +5°C to +30°C.
8-9 (100g/l, H2O, 20℃)(slurry)
Aluminum Hydroxide Otc Application
Because Light weight aluminum Hydroxide Otc can be produced on a large scale, the raw products suffice, the product pureness is high, and it is conveniently soluble in acid and alkali. Consequently, light weight aluminum hydroxide is a vital raw material for preparing aluminum salts, such as barium aluminate, aluminum sulfate, and so on.
Light weight aluminum Hydroxide Otc powder is normally regarded as a perfect for plastics, unsaturated polyester, rubber as well as various other organic polymers because of its filling, fire retardant, smoke suppression functions and also non-toxic and also safe. flame retardant filler. Fire resistant mechanism of light weight aluminum hydroxide: When the temperature exceeds 200 ℃, Aluminum Hydroxide Otc begins to endothermic decomposition as well as launches 3 crystal waters, and also its decomposition rate is the largest at concerning 250 ℃. which is: 2Al( OH) 3 → Al2O3 + 3H2O ↑. This reaction is a solid endothermic reaction, consequently preventing the rise of the polymer temperature level, decreasing its decomposition price, and also just generating water vapor, no toxic and also dangerous gases. For that reason, the flame retardant mechanism can be summed up as adheres to: 1) Endothermic effect. Dehydration endothermic at 300-350 ℃, hindering the temperature surge of the polymer; 2) dilution. ATH filling lowers the focus of flammable polymers. The water vapor launched by ATH dehydration weakens the focus of combustible gas as well as oxygen, which can protect against combustion; 3) Covering effect. After ATH is dehydrated, an Al2O3 safety movie is based on the surface area of the flammable product to separate oxygen and protect against continued combustion; 4) Carbonization. Flame retardants produce solid dehydrating substances under burning conditions, which carbonize plastics and also are less most likely to produce combustible volatiles, therefore avoiding the spread of flames.
Aluminium Hydroxide Otc is calcined at high temperature to get alumina, as well as alumina has high thermochemical security, thermal strength, creep resistance, dielectric residential or commercial properties and also low thermal expansion coefficient, as well as is an essential product for synthetic ceramics. Throughout ceramic synthesis, aluminum hydroxide activates and also manages the condensation process, thereby achieving control over the phase formation of the composite.
Light weight aluminum Hydroxide Otc is mainly made up of Al( OH) 4- in water, which can precipitate harmful heavy metals in sewage by co-precipitation and afterwards filter to achieve the impact of water filtration. Aluminum Hydroxide Otc also has a high certain surface area, which can adsorb colloids, put on hold solids, dyes, organics, etc in sewage on the surface.
Aluminum Hydroxide Otc can neutralize gastric acid, and is non-toxic and also safe. It is a conventional good medicine for the therapy of gastric illness. The use of light weight aluminum hydroxide as an adjuvant can also boost the immunogenicity of the vaccine. Its mechanism of activity is to adsorb the antigen externally of light weight aluminum hydroxide and also release it gradually to extend the efficacy of the vaccine.
Throughout the preparation process of Light weight aluminum Hydroxide Otc, the target items with various specific surface, pore quantity, pore structure as well as crystal framework are prepared by managing the temperature level, concentration and pH of the reactants, which can be properly made use of as a catalyst service provider for Hydrogenation of unsaturated carbonyl compounds, preparation of fullerenes, etc 7. Paper industry: Aluminum Hydroxide Otc has high whiteness, ultra-fine bit size, complete crystal type, and solid compatibility with brighteners. Utilizing it as an additive for coatings as well as resins can successfully enhance the whiteness, opacity, smoothness as well as ink attachment of coated paper.
Aluminum Hydroxide Otc Preparation
Industrial production methods
Other synthetic methods
Industrial production methods
Industrial production methods mainly include Bayer method and sintering method. 1) Bayer method: 97% of the bauxite ore produced every year in the world is processed by the Bayer method to obtain alumina. The Bayer process consists of two main processes: heat treatment of bauxite with caustic soda solution, so that Aluminum Hydroxide Otc in the ore produces sodium metaaluminate, namely:
Then, the cooled sodium aluminate solution is decomposed by stirring, and then filtered and separated to obtain the product of Aluminum Hydroxide Otc, namely
2) Sintering method: In industrial aluminum production, the sintering method is suitable for high-silicon bauxite, that is, Al2O3/SiO2<7. The steps of the sintering method include the following aspects: First, the bauxite and sodium carbonate solution are mixed in a certain proportion for sintering, namely:
Secondly, the sintered bauxite is prepared into sodium aluminate by leaching with sodium carbonate solution; namely:
Finally, CO2 gas is passed into the sodium aluminate solution to generate Aluminum Hydroxide Otc.
The Aluminum Hydroxide Otc synthesized by the hydrothermal method has high purity, small particle size, uniform distribution, easy control of crystal shape, and simple operation. Therefore, it is widely used in the process of synthesizing aluminum hydroxide. Using aluminum isopropoxide as the main raw material, it was mixed with distilled water in a molar ratio of 1:100 to make it hydrolyzed. Heat treatment, and then cooling and centrifuging to obtain nano aluminum hydroxide. The prepared aluminum hydroxide product is a typical boehmite flake structure with a particle size of about 10 nm.
The sol-gel method is currently a commonly used method for the preparation of ultra-fine Aluminum Hydroxide Otc. The most common sol-gel method for preparing aluminum hydroxide is to hydrolyze aluminum salts and alkoxides in water. The mechanism is divided into two steps: the -OR group is first hydrolyzed to produce -OH, and then aluminum hydroxide is precipitated in the form of precipitation. A highly crystalline aluminum hydroxide product was synthesized by reacting aluminum isopropoxide and monobutyltrimethylimidazolium borofluoride in 1 L of hydrophilic ionic liquid and using (NH)4OH as a catalyst at 30 °C. , and heat treatment at 300 ℃ to obtain highly crystalline alumina particles, and the product is boehmite with low crystallinity when isopropanol is used as a medium, and a new composite material is synthesized by combining the aluminum hydroxide product with polystyrene.
The carbon fractionation method is a method in which CO2 gas is introduced into the sodium metaaluminate solution to precipitate aluminum hydroxide, and the size and morphology of the product are controlled by adjusting the pH value and CO2 concentration.
Microemulsions typically consist of surfactants, cosurfactants, solvents, and water (or aqueous solutions). Microemulsions have properties such as ultra-low interfacial tension and high solubilizing ability. The preparation of nanomaterials by microemulsion technology can precisely control the crystal growth process of nanomaterials, and the microemulsion spheres wrap the crystal particles, effectively preventing the agglomeration of nanoparticles.
Other synthetic methods
1) Acid-base method: Zhejiang University of Technology uses industrial solid waste alum pulp as raw material, mainly containing KAl(SO4)2 and SiO2, and a small amount of Fe2O3 in the rest. First, use H2SO4 for acid treatment to obtain Al2(SO4)3, and then add Excess NaOH is filtered to remove iron to obtain sodium metaaluminate, which is then neutralized with H2SO4 to precipitate aluminum hydroxide. According to the discussion of the preparation process, it is considered that the best synthesis conditions are: H2SO4 concentration 16 mol/L, NaOH concentration 5 mol/L L. This method realizes the efficient utilization of industrial solid waste, but the product yield is not high and contains many impurities, which still needs to be purified.
2) Ion membrane electrolysis method: Alkaline ion membrane electrolysis MA1(ΟH)4 to obtain aluminum hydroxide, where M represents an alkali metal, and the electrolysis temperature is not less than 40 °C. This method can greatly improve the decomposition efficiency of sodium aluminate, and obtain high-quality, high-yield Aluminum Hydroxide Otc.
3) Homogeneous precipitation method: Using Al(NO) 3 9H2O and anhydrous sodium acetate as raw materials, nano-sodium hydroxide was prepared by homogeneous precipitation in the absence of water. The specific experiment is as follows: 0.3 mmol Al(NO) 3 9H2O and 0.9 mmol anhydrous sodium acetate, with PVP (60 g) as the dispersant, add 30 mL of ethylene glycol together into a beaker and stir at room temperature until it is completely dissolved. The reactants were transferred to a 50 mL autoclave containing Teflon and crystallized at 180 °C for 5 h. This method can achieve the effect of controlling the particle size and morphology of the product by controlling the reaction temperature and the concentration of the reactants.
4) Aluminum salt hydrolysis method: add 100 g Na2SO4 to 412 g Al2(SO4)3 solution, and then add the mixed solution to the Na2CO3 solution with a mass fraction of 26% at a rate of 25 mL/min for hydrolysis. When the pH is between 7 and 8, the synthesized BET is 350-450 m2/g, and the pore volume is 0.58-0.9×10-6 m2/g of porous boehmite. When the pH is equal to 9, the synthesized boehmite BET drops to 189 m2/g, while the pore volume increased to 1.27×10-6 m2/g.
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Company Profile and Corporate Culture
ZhiShang Chemical is owned by ZhiShang Group is a professional new-type chemicals enterprise combined into research and development, production and sales .
The company’s competitive product is pharmaceutical raw materials and intermediates (especially carbohydrate derivatives Series), In recent years, the company has made a major breakthrough in food and feed additives, plant extraction, industrial chemicals industry .
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The production base is located in Zhangqiu chemical industry park and Tai’an high-tech chemical industry park. laboratory and workshop in strict accordance with the GMP standard and the product fit national ISO9001 and ISO2000 standards.
“Zhishang” products are exported to Europe, North and South America, the Middle East, Asia Pacific and Africa area, so as to establish a long-term and stable cooperation relationship with customer in the world.
Business Type: Manufacturer
Product Range: Cosmetic raw materials
Products/Service:Cosmetic raw materials (flavors and fragrances,antioxidant products, moisturizing and hydrating, whitening agents, cosmetic additives)
Factory Location : Diao Town Industry Park, Zhangqiu City, Jinan City, Shandong Province, China.
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