Application background and overview of sodium perborate tetrahydrate
Sodium perborate tetrahydrate is white monoclinic crystalline particles or white powder. It is soluble in acid, alkali and glycerol, and slightly soluble in water. The solution is alkaline (pH value 10~11). The sodium metaborate solution is obtained by reacting borax and sodium hydroxide, reacting with hydrogen peroxide at a temperature below 35°C, crystallizing by cooling, centrifuging, and drying. It can also be produced by adding borax to soda ash as the electrolyte, using platinum as the anode and a tin tube as the cathode. This product is commonly used as an oxidant for the color development of indanthrene dye, bleaching and degreasing of original cloth, and as a disinfectant and bactericide in medicine. It can also be used as a mordant, detergent additive, deodorant, and additive for electroplating solutions. , analytical reagents, organic synthesis polymerizers, and toothpaste, cosmetics, etc.
Applications of sodium perborate tetrahydrate
CN200910049332.8 reports a preparation method of iodobenzene diacetate. Iodobenzene diacetate is an organic hypervalent iodine compound. It is a type of mild, non-toxic oxidant and has a strong electrophilic reagent. It is different from previous heavy metals. Oxides such as KMnO4, CrO3, etc. have the advantages of being non-polluting and non-toxic. This method uses sodium perborate tetrahydrate as raw material, and undergoes an acylation reaction with iodobenzene in the presence of glacial acetic acid/acetic anhydride mixture, wherein the molar ratio of sodium perborate tetrahydrate to iodobenzene is 3-10:1, and the reaction The temperature is 30°C-45°C, and the reaction time is 4-24 hours. After the reaction, ice water is added to obtain crude iodobenzene diacetate, which is then recrystallized to obtain iodobenzene diacetate. Compared with the existing technology, the present invention has reasonable process, simple operation, safe production, is suitable for industrial large-scale production, and provides favorable conditions for the industrial production of iodobenzene diacetate through the esterification of boric acid inalcohol.
For the preparation of sodium perborate monohydrate. Sodium perborate usually exists in two forms: sodium perborate tetrahydrate and sodium perborate monohydrate. Compared with sodium perborate tetrahydrate, sodium perborate monohydrate has a particularly high active oxygen content, which is 50% higher than that of sodium perborate tetrahydrate, and also has a higher dissolution rate. These properties make Sodium perborate monohydrate is showing increasing appeal in the field of detergent compositions.
CN200610068757. The temperature of the air flow is controlled between 150-220 degrees, and the fluidization speed of the air flow is 0.5-0.8m/s. In the fluidized layer, the hot air flow and the material complete the heat exchange and drying process. The drying time is more than 50 minutes. Sodium perborate tetrahydrate is dehydrated into sodium perborate monohydrate-10B; then the sodium perborate monohydrate is cooled in a fluidized state; it is packaged after the cooling is qualified and meets the packaging requirements; the dust-containing gas first enters the cyclone dust collector for processing After the first dust removal, the bag dust collector is used for secondary purification and then emptied; the collected dry powder is sent to the finished product area for packaging. The invention allows sodium perborate monohydrate to be prepared and dust removed at the same time, has high production efficiency, reliable product quality, reduces environmental pollution, and is simple, convenient, stable and reliable.
