Sodium Bromate Powder is an inorganic compound with molecular formula of nabro ₃, colorless crystal or white particle, crystalline powder. No smell. Decompose at 381 ℃ and release oxygen at the same time. Soluble in water, insoluble in ethanol, the aqueous solution is neutral and oxidizing. Friction with organic substances, sulfides and easily oxidized substances can cause combustion or explosion. Irritating. It forms explosive mixture with ammonium salt, metal powder, combustibles, organics or other oxides, which is easy to cause combustion or explosion after friction or heating. It is easy to explode in contact with sulfuric acid. It can react violently with aluminum, arsenic, copper, carbon, metal sulfide, organic matter, phosphorus, selenium and sulfur. It should be used as analytical reagent, oxidant and perm agent. It should be mixed with sodium bromide as gold dissolving agent.
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C.F. |
BrNaO3 |
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E.M. |
150 |
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M.W. |
151 |
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m/z |
150 (100.0%), 152 (97.3%) |
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E.A. |
Br, 52.95; Na, 15.24; O, 31.81 |
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Sodium bromate (NaBrO3) is a white crystal composed of Na+ions and BrO3- ions. In NaBrO3, sodium ions are affected by charge and are in a fixed position within the molecule. The BrO3 ion is composed of bromine atoms (Br) and three oxygen atoms (O). This structure gives BrO3- ions a certain degree of symmetry, with oxygen atoms arranged in an anti triangle, and the bond length phase between each oxygen atom and bromine atom. This molecular structure determines the physicochemical properties and practical application range of NaBrO3.
The molecular structure of NaBrO3 has ionic properties, with Na+ions carrying positive charges and BrO3- ions carrying negative charges. This ion structure allows NaBrO3 to rapidly dissolve and undergo proton exchange reactions when it comes into contact with water. This type of ion forms a polarized buffering system with a polar organic solvent such as dimethyl sulfoxide (DMSO), which can effectively promote organic synthesis reactions. It is widely used in fields such as chemistry, textiles, bleaching, medicine, and other fields, such as preparing drugs, dyes, glass, and additives for cubic crystals.
In chemical reactions, the molecular structure of NaBrO3 gives it some special properties. For example, it can generate halogen (Br2) through a reduction reaction, which is widely used for the preparation and detection of halogen compounds. In addition, in certain special circumstances, NaBrO3 can also be used as an oxidant.
Melting point 755 ° C (lit.), Boiling point 1390 ° C, Density 3.339 g/ml at 25 ° C (lit.), Vapor pressure 1 mm Hg (806 ° C), Refractive index 1.594, Storage condition store below +30 ° C, Solubility h2o: 1 m at 20 ° C, clear, colorless, Form powder/solid, Color white, Specific gravity 3.34, PH value 5.0-9.0 (25 ℃, 50mg/ml in H2O), Acid base indicator discoloration pH range 5 - 9, Water solubility 364 g/l (20 º C)
There are three ways to synthesize Sodium Bromate Powder:
Chlorine oxidation method: add bromine dropwise to the lime milk prepared by lime powder and water for reaction to generate calcium bromate and calcium bromide, and then add chlorine for oxidation reaction. After filtration and washing, the filtrate is concentrated. Barium chloride solution is added for reaction at low temperature. The barium bromate generated from the reaction is washed with water and then re decomposed with sodium carbonate. The finished sodium bromate is prepared through filtration, evaporation, crystallization, separation and drying. The reaction equation is as follows:
bromine is added to NaOH solution. Evaporate and concentrate the reaction liquid until the volume is reduced by half. Cooling, suction filtration, washing crystallization with a small amount of cold water, dissolving in the same amount of hot water for recrystallization.
Direct current is applied to the aqueous sodium bromide solution to make the sodium bromide anodized to sodium bromate.
Sodium bromate (NaBrO3), as an inorganic compound, has become a key raw material in various fields such as chemical, metallurgical, daily chemical, and pharmaceutical industries due to its unique chemical properties and wide applicability.
1. Extraction of precious metals: the "chemical key" for gold dissolution
After mixing sodium bromate with sodium bromide, gold can be converted into soluble compounds through oxidation reactions, becoming a core reagent for the extraction and purification of precious metals such as gold and platinum. Its advantages lie in:
Efficient dissolution: Under acidic conditions, it reacts with sodium bromide to form bromine (Br ₂), which then reacts with gold to form soluble gold bromide complexes, achieving efficient separation of metals from ores.
Environmentally friendly alternatives: Compared to traditional cyanide methods, the sodium bromate system has lower toxicity and can reduce environmental pollution through neutralization treatment.
2. Textile printing and dyeing: "enhancers" for dyeing effects
Wool finishing agent: can improve the moisture absorption and dyeing performance of wool fibers, and enhance the texture of fabrics.
Sulfurization/reduction dye oxidant: During the dyeing process, it acts as an oxidant to promote the bonding between the dye and the fiber, making the color more vibrant and the fastness higher. For example, in the dyeing of sulfur black dye, adding it can increase the dyeing depth by 20% while reducing the residual floating color.
3. Metal smelting: the "refining master" of purification technology
In the smelting of precious metals such as gold and platinum, they participate in redox reactions to remove impurity elements (such as iron and copper) and improve metal purity. For example, in platinum refining, the impurity content can be reduced from 5% to below 0.1% to meet high-end manufacturing needs.
1. Hair perm agent: a "chemical stylist" for curling hair
As the main component of cold perm agent, it changes the disulfide bonds in the protein structure of hair through oxidation, achieving a curling effect. Its advantages lie in:
Mild: Compared to traditional ammonium thioglycolate (TG ammonium), it has lower scalp irritation and is suitable for sensitive individuals.
Durability: The oxidized disulfide bond re crosslinks, maintaining the curling effect for 3-6 months, significantly better than the 1-2 months of hot pressing.
2. Cleaning agent: the "oxidation killer" for stubborn stains
The strong oxidizing property of sodium bromate powder makes it an ideal raw material for preparing efficient cleaning products:
Kitchen oil removal: After compounding with surfactants, it can decompose animal and vegetable oils into soluble fatty acids, increasing cleaning efficiency by 30%.
Industrial equipment cleaning: In oil pipeline cleaning, sodium bromate solution can remove sediments such as ferrous sulfide and restore pipeline flow.
1. Chemical reagents: the "synthetic cornerstone" of inorganic chemical products
It is a raw material for preparing other bromate salts (such as potassium bromate and ammonium bromate), and also serves as a reference substance for phenolic determination, used to calibrate the concentration of reducing agents (such as sodium thiosulfate).
2. Oxidizing agent: the "catalytic assistant" for organic synthesis
In organic synthesis, it can be used as a catalyst or reactant for oxidation reactions:
Alcohol oxidation: oxidize primary alcohols to aldehydes and secondary alcohols to ketones, with mild reaction conditions and high selectivity.
Epoxidation of olefins: Combined with hydrogen peroxide, it achieves the conversion of olefins to epoxides, providing key intermediates for drug synthesis.
3. Bromine Generator: A Convenient Solution for Laboratory Bromine Sources
By acidifying a mixed solution of sodium bromate and sodium bromide, bromine (Br ₂) can be quantitatively generated for use in bromination reactions or as an analytical reagent. This method is easy to operate and has high safety, avoiding the storage and transportation risks of directly using liquid bromine.
According to the analysis of the Sodium Bromate Powder industry, the sales volume of sodium bromate increased from 310000 tons in 2009 to 1.22 million tons in 2014, with the proportion increasing from 3.47% to 11.03%; Industrial sodium bromate increased from 3.28 million tons to 5.12 million tons, accounting for 46.29% of the total.
From the global consumption trend of sodium bromate, sodium bromate products are showing a diversified development trend. There are many varieties of sodium bromate abroad, and it is extremely important for China's sodium bromate industry to accelerate the application and development of sodium bromate products if it wants to occupy a position in the fierce market competition.
The raw material resources of sodium bromate in China are extremely abundant. By the end of 2017, China's production of sodium bromate reached 62.666 million tons, a year-on-year increase of 3.8%. As of January August 2018, China's production of sodium bromate reached 37.072 million tons, a year-on-year decrease of 0.9%. It is expected that the production of sodium bromate in China will reach 63.1 million tons in 2018, with a compound annual growth rate of about 0.86% in the next five years (2018-2022). It is expected that the production of sodium bromate in China will reach 65.3 million tons by 2022.
From 2015 to 2019, the export value of sodium bromate in China steadily increased. In 2018, the export value of sodium bromate in China was 70.66 million US dollars, a year-on-year increase of 011%; In 2019, the export value of sodium bromate from China was 71.2 million US dollars, a year-on-year increase of 0.76%.
Investing in the construction of sodium bromide projects can significantly improve economic benefits, thereby enhancing the company's core competitiveness in the sodium bromide industry and promoting sustainable development in the industry. At the same time, it can also promote small and medium-sized enterprises to improve their effective supply capacity of products and services. Continuously improving the quality of products and services. Small and medium-sized enterprises can also strengthen and refine their core businesses, creating competitive and influential products and services.
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