FIELD: chemistry.
SUBSTANCE: method of obtaining pure sodium carbonate includes preparation of water solution of sodium carbonate, filtration of obtained solution with its further carbonisation and separation of finished product. Carbonisation of 20% solution of sodium carbonate is carried out by passing gaseous carbon dioxide, taken with 10-15% excessive quantity from stoichiometry, through it at temperature 60-70°C and at rate 10-15 l/hour. After that, suspension of formed sodium hydrocarbonate is purified by filtration, washed with water and pressed. Separated crystals are subjected to thermal processing, starting with 80°C and finishing at 300°C.
EFFECT: invention makes it possible to obtain highly pure sodium carbonate, suitable for application as raw material in optic glass manufacturing and fibre optics.
1 tbl, 10 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PRODUCING PURE CALCIUM CARBONATE | 2013 |
|
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| METHOD OF PRODUCING HIGHLY PURE CADMIUM CARBONATE | 2013 |
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| METHOD FOR PRODUCING A COMPOSITE METAL-DISPERSED COATING, DISPERSED SYSTEM FOR PRECIPITATION OF COMPOSITE METAL-DISPERSED COATING AND METHOD OF ITS PRODUCTION | 2020 |
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