What is the situation regarding the raw materials and supplies used for producing caustic soda?

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This post was last edited by sunjl1981 on 2013-1-6 at 22:07. The raw materials and reagents include: 1. Raw salt, 2. Barium chloride, 3. Sodium carbonate, 4. Ferric trichloride, 5. Sodium sulfite, 6. Sulfuric acid, 7. White sugar. Question 1: May I ask what quality standards are used in the factories of industry professionals? For example, are they top-grade products, first-class products, or only qualified products? And why? Question 2: What is the price difference between top-grade products, first-grade products, and qualified products? My understanding: Taking sodium carbonate as an example, the details include: mass fraction of sodium carbonate, price (yuan/ton), cost-effectiveness, whether it is included in the magazine and its impact on product quality, as well as transportation costs. For top-quality products: ≥99.2% purity, price of 1100 yuan/ton, cost-effectiveness index of 0.090, no impact on product quality, value of 1 (assumed to be 1). For first-class products: ≥98.8% purity, price of 1050 yuan/ton, cost-effectiveness index of 0.094, no impact on product quality, value of 1.004. For qualified products: ≥98% purity, price of 1000 yuan/ton, cost-effectiveness index of 0.098, no impact on product quality, value of 1.012. Therefore, choosing qualified products is the most appropriate option. #hcbbs