Usage: as the basic chemical material, widely used in the chemical , metallurgy, paper-making , oil, textile, and domestic chemical industry
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Item
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Index
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Mercury Process
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Causticizing Process
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Diaphragm Process
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Superior quality
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First grade
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Acceptable part
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Superiorquality
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First grade
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Acceptable part
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Superior quality
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First grade
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Acceptable part
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|
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NaOH≥
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99.5
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99.5
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99.0
|
97.0
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97.0
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96.0
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96.0
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96.0
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95.0
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NaCO3≤
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0.40
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0.45
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0.90
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1.5
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1.7
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2.5
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1.3
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1.4
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1.6
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NaCl≤
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0.06
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0.08
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0.15
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1.1
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1.2
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1.4
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2.7
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2.8
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3.2
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Fe2O3≤
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0.003
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0.004
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0.005
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0.008
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0.01
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0.01
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0.008
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0.01
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0.02
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Ca/Mg≤
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0.01
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0.02
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0.03
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SiO2≤
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0.02
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0.03
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0.04
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0.50
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0.55
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0.60
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Hg≤
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0.005
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0.005
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0.0015
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