The uses of soda ash are mainly used in the glass industry, chemical industry, measurement benchmarks, food industry and so on.
1, glass industry
Glass industry is the largest source of soda ash consumption, per ton of glass consumption of soda ash 0.2t. Mainly used in float glass, picture tube glass shell, optical glass, etc..
2, chemical industry
Chemical industry is mainly used for the production of sodium salt, metal carbonates, baking soda, sodium nitrate, sodium nitrite, sodium silicate, borax, bleach, fillers, detergents, catalysts and dyes.
3, measurement benchmark
Quantitative analysis of the benchmark for the calibration of acid, determination of aluminum, sulfur, copper, lead and zinc. Test urine and whole blood glucose. Analyze the co-solvent of silica in cement. Metallographic analysis of metals, etc.
4, food industry
Food industry as a neutralizer, bulking agent, such as the manufacture of amino acids, soy sauce and noodle foods such as steamed bread, bread and so on. Can also be formulated into alkaline water added to pasta to increase the elasticity and ductility. It can also be used to produce monosodium glutamate.
Properties of soda ash sodium carbonate
1, solubility?
Sodium carbonate is soluble in water and glycerol. 20 ℃ every hundred grams of water can dissolve 20 grams of sodium carbonate, 35.4 ℃ when the maximum solubility, 100 grams of water can dissolve 49.7 grams of sodium carbonate, slightly soluble in anhydrous ethanol, insoluble in propanol. The solution is alkaline, can make phenolphthalein red.
2, stability?
Stability is strong, but it can be decomposed at high temperature to produce sodium oxide and carbon dioxide.
3, hydrolysis reaction
Because of the hydrolysis of sodium carbonate in aqueous solution, ionized carbonate ions combine with hydrogen ions in water to form bicarbonate ions, resulting in a reduction of hydrogen ions in the solution, leaving the ionized hydroxide ions, so the solution pH is alkaline.
The above reference? Baidu Encyclopedia-Sodium Carbonate