CAS No.: | 7647-14-5 |
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Formula: | Nacl |
EINECS: | 231-598-3 |
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Preparation
A sodium chloride production method is characterized by: including the following steps:
(1) Prepare a brine containing at least 150 g/l sodium chloride by dissolving a source of sodium chloride in water;
(2) Cool the resulting brine to a temperature below 0°C but above the eutectic temperature of the resulting brine by indirect cooling in a self-cleaning fluidized bed heat exchanger/crystallizer, thereby forming a sodium chloride dihydrate containing The slurry and mother liquor of the product, the brine does not contain any solid sodium chloride according to the naked eye;
(3) Separating the sodium chloride dihydrate formed in step (2) at the eutectic temperature such that a stream rich in sodium chloride dihydrate is formed;
(4) Feed sodium chloride dihydrate into the recrystallizer to form sodium chloride and mother liquor.
TEST ITEMS |
TEST STANDARD
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REFINED INDUSTRIAL SALT
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RAW INDUSTRIAL SALT
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SODIUM CHLORIDE
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≥99.1%
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≥98.5%
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≥94.5%
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MOISTURE
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≤0.30%
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≤0.50%
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≤3.90%
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WATER INSOLUBLE
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≤0.05%
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≤0.10%
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≤0.40%
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TOTAL CALCIUM AND MAGNESIUM IONS
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≤0.25%
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≤0.40%
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≤0.50%
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SULFATE ION
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≤0.30%
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≤0.50%
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≤0.70%
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