FIELD: chemistry.
SUBSTANCE: aluminium and alkali metal nitrate salts are processed by evaporating the nitrate salt solution to salt concentration of 45-55 wt %, thermal hydrolysis of aluminium nitrate with conversion thereof to aluminium hydroxide with a boehmite structure in an autoclave to degree of deposit of aluminium of 98% in an equimolar mixture of sodium nitrate and potassium nitrate at temperature of 220-250°C and pressure of 0.6 MPa while feeding jet steam into the autoclave. Sodium and potassium nitrate salts are leached from the obtained pulp and then separated from the aluminium hydroxide residue.
EFFECT: invention enables to obtain aluminium hydroxide with a boehmite structure of high purity and alkaline nitrates in form of desired products.
1 tbl, 5 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PURIFYING ACIDIC SALT SOLUTIONS CONTAINING ALUMINIUM NITRATE FROM IRON | 2011 |
|
RU2480413C2 |
| METHOD OF PRODUCTION OF ALUMINUM OXIDE | 2002 |
|
RU2202516C1 |
| METHOD FOR PROCESSING OF OXIDISED NICKEL ORES | 2013 |
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| METHOD OF PROCESSING NEPHELINE | 2011 |
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| METHOD OF PROCESSING OF SERPENTINITE | 2005 |
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| METHOD FOR SORPTION EXTRACTION OF IRON FROM NITRATE SALT SOLUTIONS | 2011 |
|
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| METHOD OF COMPREHENSIVE PROCESSING OF APATITE-NEPHELITE ORES | 0 |
|
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| TREATMENT OF MANGANIFEROUS MATERIALS | 2013 |
|
RU2563391C1 |
| METHOD FOR PROCESSING SYNNYRITE TO OBTAIN POTASSIUM FERTILIZERS AND ALUMINA | 2023 |
|
RU2820256C1 |
| REMOVAL OF METALS FROM MANGANESE-CONTAINING MATERIALS OXIDES | 2013 |
|
RU2610103C2 |
