Orthoboric acid powder Raw Materials CAS 10043-35-3

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Uses and synthesis of Orthoboric acid powder

Orthoboric acid Raw Materials is a crystalline compound generated by dissolving diboron trioxide in water, which is an inorganic acid, mainly including tetraboronic acid H2B4O7 (also known as pyroboronic acid), metaboronic acid (HBO2)n and orthoboric acid H3BO3 (also known as protoboric acid). Among them, Orthoboric acid Raw Materials contains the most water and is the most stable.

Orthoboric acid powder also referred to as boric acid, the appearance of white powdery crystals or triclinic axial scaly crystals, glossy. It has a slight bitter and astringent odor. Slightly bitter and astringent odor, slippery feeling in contact with skin.

No odor, soluble in water, ethanol, glycerol, ether and essential oils, the aqueous solution shows weak acidity, Orthoboric acid CAS 10043-35-3 When heated to 70-100 ° C gradually dehydrated into metaboric acid, 150 ° C -160 ° C into pyroboric acid, 300 ° C into boronic anhydride (B2O3). Boric acid is toxic to human body.

Solubility in water: 2.77 at 0 ℃, 10 ℃, 3.65, 20 ℃, 4.87, 25 ℃, 5.74, 30 ℃, 6.77, 40 ℃, 8.90, 50 ℃, 11.39, 60 ℃, 14.89, 80 ℃, 23.54, 100 ℃, 38.00. The aqueous solution is weakly acidic is a typical Lewis acid, in the presence of hydrochloric, citric or tartaric acid, can promote in the presence of water. In the presence of hydrochloric acid, citric acid or tartaric acid, the solubility in water can be promoted. Therefore, it can be purified by recrystallization.

Applications / Functions of Orthoboric acid powder

• Orthoboric acid CAS 10043-35-3 Used as pH adjusting agent, disinfectant, anti-bacterial and antiseptic, etc.
• Orthoboric acid powder can be used in capacitor manufacturing and electronic components industry, high-purity analytical reagents, pharmaceutical disinfection and anticorrosion and the preparation of exposed photographic materials rinsing processing solution.
• Orthoboric acid Raw Materials is used in glass, enamel, ceramics, medicine, metallurgy, leather, dyestuff, pesticide, fertilizer, textile and other industries.
• Orthoboric acid Raw Materials Used for chromatographic analysis reagents, also used in the preparation of buffer
• Orthoboric acid CAS 10043-35-3 used in large quantities in the glass (optical glass, acid-resistant glass, heat-resistant glass, insulating materials with glass fibers) industry, can improve the heat-resistant glass products, transparent performance, improve mechanical strength, shorten the melting time.
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• In the enamel and ceramic industry, Orthoboric acid powder is used to enhance the luster and firmness of enamel products, and is also one of the components of glaze and pigment. Orthoboric acid powder is used as additives and co-solvents in metallurgical industry, especially boron steel with high hardness and good rolling ductility, which can replace nickel steel.Orthoboric acid powder has anticorrosive properties and can be used as antiseptic, such as wood preservation. It is used in metal welding, leather, photographic industry and the manufacture of dyestuffs, heat-resistant and fireproof fabrics, artificial gemstones, capacitors and cosmetics. It can also be used as insecticide and catalyst.
• Boron trace element fertilizer in agriculture, many crops have fertilizer effect, can enhance crop quality and improve yield.Orthoboric acid Raw Materials is also one of the basic raw materials for the production of other boron compounds, boron compounds produced by it are widely used in national defense and other industrial sectors and scientific research units.

Physicochemical Property of Orthoboric acid powder

Orthoboric acid powder is actually the hydrate of boron oxide, which is white powdery crystal or three oblique axial scales with glossy crystal. It has a slippery feel and no odor. Soluble in water, alcohol, glycerin, ether and essential oil.

production methodprocess of Orthoboric acid powder

1. Borax sulfuric acid neutralization method will be borax dissolved into a relative density of 30 ~ 32 ° Bé solution, filtered to remove impurities, and then put into the acid solution tank, at 90 ℃, add the equivalent of sulfuric acid, so that the solution in the Ph2 ~ 3 when the reaction. The finished reaction solution is cooled, crystallized, separated and dried to produce Orthoboric acid powder.
2. Carbon and ammonia method will be roasted boron ore powder mixed with ammonium bicarbonate, in the leaching kettle to heat the material to 140 ℃, the pressure of 1.5 ~ 2.0Mpa reaction for about 4h, the release of the remaining gas, through the absorption of ammonia tower will be ammonia recycling, when the temperature drops to 110 ℃ when the material can be discharged. After filtering and washing by filter, waste residue is excluded, and the solution is sent to ammonia evaporation tower for deamination, and ammonia can be recovered. When steamed to ammonia boron ratio of less than 0.04 (molar ratio) and then after concentration, cooling, crystallization, separation, drying, to produce Orthoboric acid CAS 10043-35-3.
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4. Hydrochloric acid method will be boron concentrate powder with mother liquor and water to the appropriate concentration, sent to the acid decomposition tank, Xu added hydrochloric acid to the specified amount of acid, stirring for a certain period of time, and then raise the temperature to 95 ~ 100 ° C, the reaction for 2h, and then filtered, discarding the filtrate, filtrate cooling, crystallization, centrifugal separation, washing, drying, packaging, the production of Orthoboric acid Raw Materials
5. Electrolysis electrodialysis method of carbon alkali borax to the carbon solution, add condensate adjusted to the specified boron concentration, as the anode chamber of the raw material liquid, sodium carbonate carbonization containing sodium bicarbonate carbonization liquid, as the cathode chamber of the raw material liquid; respectively, after controlled filtration with a pump pumping electrolysis electrodialysis tank within the corresponding electrode chamber.
6. After the flow rate is stabilized, direct current is introduced and the operation current is adjusted to the specified level. When the anode chamber effluent reaches the prescribed Ph value, it is sent to evaporation, and then cooled crystallization, centrifugal separation, drying, boric acid finished products. Sodium polyborate method will be boron and magnesium ore roasted and crushed into a certain fineness of the mineral powder, according to less than the theoretical amount of alkali ratio and soda ash solution into a suitable liquid-solid ratio of the slurry, through different concentrations of carbon dioxide gas, at a certain temperature and pressure for the carbon decomposition reaction, the reaction of the slurry after the filtration of the slurry discarded mud and slag. The sodium polyborate solution will be obtained by evaporation and concentration after adding sulfuric acid neutralization, cooling crystallization, centrifugal separation, drying, the system Orthoboric acid Raw Materials
7. Recrystallization method will be industrial boric acid dissolved in distilled water, after the removal of impurities, purification, filtration, crystallization, centrifugal separation, drying to produce Orthoboric acid CAS 10043-35-3.

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