SU555052A1 - The method of producing alumina - Google Patents
The method of producing aluminaInfo
- Publication number
- SU555052A1 SU555052A1 SU2195614A SU2195614A SU555052A1 SU 555052 A1 SU555052 A1 SU 555052A1 SU 2195614 A SU2195614 A SU 2195614A SU 2195614 A SU2195614 A SU 2195614A SU 555052 A1 SU555052 A1 SU 555052A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- producing alumina
- alum
- aluminum
- ammonia
- aqueous solution
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/34—Preparation of aluminium hydroxide by precipitation from solutions containing aluminium salts
Description
1one
Изобретение относитс к способам получени оксида алюмини , используемого преимущественно дл изготовлени поликристаллической корундовой керамики, а также дл приготовлени катализаторов,The invention relates to methods for producing alumina, used primarily for the manufacture of polycrystalline corundum ceramics, as well as for the preparation of catalysts,
Известен способ получени оксида алюмини путем обработки водных растворов солей алюмини концентрированным водным раствором аммиака с последующими сушкой и прокаливанием полученного оксигидрата алюмини . Например, 10%-ный или растворы алюмоаммонийных квасцов разлагают концентрированным раствором аммиака, частично отжимают осадок от маточного раствора на центрифуге, сущат при 100 С и прокаливают при 11001300 с 1.A method of producing alumina is known by treating aqueous solutions of aluminum salts with a concentrated aqueous solution of ammonia, followed by drying and calcining the resulting aluminum oxyhydrate. For example, 10% or alum-ammonium alum solutions are decomposed with a concentrated ammonia solution, the precipitate is partially drained from the mother liquor in a centrifuge, stored at 100 ° C and calcined at 11001300 s 1.
Однако известный способ обладает существенным недостатком: продукт разложени алюмоаммонийных квасцов - оксигидра алюмини - получают в виде студенистой массы, исключительно плохо фильтрующейс (коэффициент сопротивлени фильрации пор дка 2 10 сек/см), что затрудн ет отделение осадка от маточной жидкости, промывку его от сульфатионов , в результате, приводит к выбросу в окружающую среду окислов серы при последующем прокаливании. Поэтому указанный способ не может быть использован в промыщленных масщтабах без применени сложного сорбционного оборудовани дл очист ки выбросных газов.However, the known method has a significant disadvantage: the decomposition product of ammonium alum alum - aluminum oxyhydra - is obtained in the form of a gelatinous mass, extremely poorly filtering (filtering resistance coefficient of about 2 to 10 sec / cm), which makes it difficult to separate the precipitate from the mother liquor, washing it from the sulfations , as a result, results in the emission of sulfur oxides into the environment during subsequent calcination. Therefore, this method cannot be used in industrial scale without the use of complex sorption equipment for cleaning exhaust gases.
Целью изобретени вл етс повыщение фильтруемости пульпы и предотвращение выделени вредных газов в атмосферу.The aim of the invention is to increase the filterability of the pulp and prevent the generation of harmful gases into the atmosphere.
Это достигаетс тем, что исходную соль алюмини предварительно обрабатывают 812°о-ным раствором аммиака.This is achieved in that the original aluminum salt is pretreated with 812 ° C with an ammonia solution.
Пример. В реактор из нержаве ощей стали с механической мещалкой и обогревом непрерывно параллельными потоками подают 22,5 л 20%-ного раствора алк моаммонийных квасцов и 14,5 л 10%-ного раствора аммиака со скорост ми соответст венно 25 и 18 мл/мин на 1 л объема реактора . Температуру реакционной массы поддерживают на уровне 80 С, рН не выще 8. Получают суспензию хорощо фильтрующегос осадка оксигидрата алюмини (коэффициентExample. To a stainless steel reactor with a mechanical broom and heating in continuous parallel flows 22.5 l of a 20% aqueous solution of alum ammonium alum and 14.5 l of a 10% aqueous solution of ammonia are used at a rate of 25 and 18 ml / min. 1 liter reactor volume. The temperature of the reaction mass is maintained at a level of 80 ° C, the pH is not higher than 8. An aluminum oxyhydrate suspension is obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU2195614A SU555052A1 (en) | 1975-12-04 | 1975-12-04 | The method of producing alumina |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU2195614A SU555052A1 (en) | 1975-12-04 | 1975-12-04 | The method of producing alumina |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU555052A1 true SU555052A1 (en) | 1977-04-25 |
Family
ID=20639272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU2195614A SU555052A1 (en) | 1975-12-04 | 1975-12-04 | The method of producing alumina |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU555052A1 (en) |
-
1975
- 1975-12-04 SU SU2195614A patent/SU555052A1/en active
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