Classification of sodium carbonate (soda ash)
Release time:
2024-01-30
Soda ash is mainly divided into light soda ash (referred to as light soda ash) and heavy soda ash (referred to as heavy soda ash) according to different densities.
1. Soda ash is mainly divided into light soda ash (referred to as light soda ash) and heavy soda ash (referred to as heavy soda ash) according to different densities.
The chemical composition is sodium carbonate, but the physical form is different. The density of light alkali is 500-600kg/m3, in the form of white crystalline powder, with a weight of 40kg/bag. The density of heavy alkali is 1000-1200kg/m3, appearing as white fine particles. 50 kg/bag, 750 kg/bag. Compared with light alkali, heavy alkali has the characteristics of solidity, large particle size, high density, low moisture absorption, less prone to clumping, less prone to flying, and good fluidity.
2. Soda ash is divided into industrial grade and food grade according to its usage.
Industrial grade soda ash is one of the main raw materials for flat glass, and can also be used as a co solvent for smelting, a flotation agent for ore dressing, and a desulfurizer for steelmaking. In the textile industry, soda ash can serve as a water softener in the textile production process.
Food grade soda ash can serve as a neutralizing agent, leavening agent, buffering agent, and dough improver for noodles, increasing their taste and flexibility. It can also be used as an auxiliary additive in the production of monosodium glutamate and soy sauce.
3. According to the different content of ammonia compounds, soda ash can be divided into ordinary alkali, low salt alkali, ultra-low salt alkali, and special low salt alkali. According to the national standard, the mass fraction of ordinary alkali sodium chloride is ≤ 1.20%; the mass fraction of low salt alkali sodium chloride is ≤ 0.90%; the mass fraction of ultra-low salt alkali sodium chloride is<0.70%; and the mass fraction of special low salt alkali sodium chloride is ≤ 0.30%.
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