FIELD: chemistry.
SUBSTANCE: invention can be used in chemical industry. Sodium chloride is produced by first preparing a salt solution containing at least 150 g/l sodium chloride by dissolving a sodium chloride source in water. The obtained salt solution is subjected to eutectic crystallisation by freezing via direct cooling of said salt solution, which results in formation of ice, sodium chloride dihydrate and a mother solution. Further, the formed sodium chloride dihydrate is separated from the ice and optionally from the mother solution at eutectic point such that a stream rich in sodium chloride dihydrate is formed. Further, said stream rich in sodium chloride dihydrate is fed into a recrystalliser to form sodium chloride and a mother solution.
EFFECT: invention reduces power consumption during industrial production of pure sodium chloride.
16 cl, 1 dwg, 2 tbl, 2 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PRODUCING SODIUM CHLORIDE | 2009 |
|
RU2504516C2 |
| METHOD AND REACTOR FOR EXTRACTING SODIUM CHLORIDE AND POTASSIUM CHLORIDE FROM POLYMINERAL SOURCES | 2018 |
|
RU2669622C1 |
| PROCESS AND METHOD FOR LITHIUM CARBONATE PURIFICATION BASED ON A LITHIUM CHLORIDE SOLUTION WITH IMPURITIES | 2020 |
|
RU2795224C1 |
| CONCENTRATING ROOT CROPS OR TUBERS WITH FREEZING | 2017 |
|
RU2720319C2 |
| METHOD FOR CONTINUOUS COLD TREATMENT OF NUTRITIVE AQUEOUS SOLUTION AND A METHOD OF PREPARING COOLED BEVERAGE | 1994 |
|
RU2156283C2 |
| METHOD OF PREPARING POTASSIUM SULFATE, SODIUM SULFATE AND SODIUM CHLORIDE | 1995 |
|
RU2157791C2 |
| METHOD OF CONTINUOUSLY PRODUCING POTASSIUM SULFATE FROM SODIUM SULFATE | 1994 |
|
RU2107028C1 |
| METHOD OF ISOLATING SODIUM IODATE FROM AQUEOUS SOLUTIONS | 1995 |
|
RU2104952C1 |
| METHOD OF PRODUCTION OF POTASSIUM SULFATE AND SODIUM SULFATE (VERSIONS) | 1995 |
|
RU2176218C2 |
| METHOD OF OBTAINING 5(6)-AMINO-2-(4-AMINOPHENYL) BENZIMIDAZOLE | 2006 |
|
RU2345988C2 |
