SU321081A1 - Method of decomposing aluminate solutions - Google Patents
Method of decomposing aluminate solutionsInfo
- Publication number
- SU321081A1 SU321081A1 SU6901392215A SU1392215A SU321081A1 SU 321081 A1 SU321081 A1 SU 321081A1 SU 6901392215 A SU6901392215 A SU 6901392215A SU 1392215 A SU1392215 A SU 1392215A SU 321081 A1 SU321081 A1 SU 321081A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- decomposition
- temperature
- decomposing
- solutions
- aluminate
- 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
- C01F7/04—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
- C01F7/14—Aluminium oxide or hydroxide from alkali metal aluminates
- C01F7/144—Aluminium oxide or hydroxide from alkali metal aluminates from aqueous aluminate solutions by precipitation due to cooling, e.g. as part of the Bayer process
- C01F7/145—Aluminium oxide or hydroxide from alkali metal aluminates from aqueous aluminate solutions by precipitation due to cooling, e.g. as part of the Bayer process characterised by the use of a crystal growth modifying agent other than aluminium hydroxide seed
-
- 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
- C01F7/04—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
- C01F7/14—Aluminium oxide or hydroxide from alkali metal aluminates
- C01F7/141—Aluminium oxide or hydroxide from alkali metal aluminates from aqueous aluminate solutions by neutralisation with an acidic agent
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Description
Изобретение относитс к пройзвопств глинозема. Известен способ разложени алюмина ных растворов с получением, глинозема введением в них затравки фосфорных сое аинений при перемешивании в течение 48-70 ч и понижении температуры с 65-7О до . При этом алюминатный раствор после фильтраций с температурой 90 С перец декомпозицией проходит стацию предварительного охлаждени в скрубберах-Охладител х QO начальной температуры декомпозиции 65-7О С. После декомпозиции маточный раствор с температурой 4О-45 С направл ют на вьтарку, где вновь нагревают до температуры кипени Степень разложени за 48 ч составл ет 51,6%. Однако охлаждение больших объемов алюминатного раствора (800000ЮООООО л/ч) перед декомпозицией и их последующее нагревание перед вь)паркой требуют больших энергетических затрат, достигающих до 4О-6О% от sHefUгозатрат в себестоимости глинозема. С целью повышени степени разложени и упрощени процесса, предлагаетс раз ложение начинать при 85-90 С и оканчивать при 5О С-. Это позвол ет степень разложени алюминатных растворов за 48 ч цо 55-56% и упростить процесс, исключ1ив стадию охлаждени растворов. Пример 1. Полупромышленное высокотемпературное разложение произ- | водственньж растворов ветви спекани Павлодарского алюминиевого завода про4 вод т с добавкой фосфорной кислоты. Объем раствора 4ОООО. л. После введени кислоты температура раствора соответствует 9О С, конечна температура деком- позиции 50 С. Процесс разложени протокает в течение 60 ч при равномерном снижении температуры и за 24, 48 и 60 чThis invention relates to alumina prozvopstv. There is a known method of decomposing aluminous solutions with the production of alumina by introducing into them the seeds of phosphoric soyenes with stirring for 48-70 h and lowering the temperature from 65-7 ° to. At the same time, the aluminate solution after filtration at a temperature of 90 ° C. Pepper decomposition passes the precooling station in scrubber-coolers QO of the initial decomposition temperature of 65-7 ° C. After decomposition, the mother liquor at a temperature of 4O-45 ° C is directed to the upper temperature, where it is again heated to boiling: The decomposition rate for 48 hours is 51.6%. However, the cooling of large volumes of aluminate solution (800000 LUOOO l / h) before decomposition and their subsequent heating before the park requires a large energy expenditure, reaching up to 4O-6O% of sHefU costs in the cost of alumina. In order to increase the degree of decomposition and simplify the process, it is proposed to start decomposition at 85-90 ° C and terminate at 5 ° C-. This allows the degree of decomposition of aluminate solutions in 48 hours to 55-56% and simplify the process, excluding the stage of cooling the solutions. Example 1. Semi-industrial high-temperature decomposition produced- | Water solutions of the sintering branch of the Pavlodar aluminum smelter are filled with phosphoric acid. Volume of solution 4oooo. l After the introduction of the acid, the temperature of the solution corresponds to 9 ° C, the final temperature of decomposition is 50 ° C. The decomposition process runs for 60 hours with a uniform decrease in temperature and 24, 48 and 60 hours.
3 32108143 3210814
степень разложени соответственно соста-60 ч степень разложени соответственdegree of decomposition, respectively, composition-60 h; degree of decomposition, respectively.
вит , 55 и 58,4%,,но составл ет 38,7 5О,6 и 55,4%Пример 2. ПолупромышленноеVit, 55 and 58.4%, but 38.7 5O, 6 and 55.4%. Example 2. Semi-industrial
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU6901392215A SU321081A1 (en) | 1969-12-29 | 1969-12-29 | Method of decomposing aluminate solutions |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU6901392215A SU321081A1 (en) | 1969-12-29 | 1969-12-29 | Method of decomposing aluminate solutions |
Publications (1)
Publication Number | Publication Date |
---|---|
SU321081A1 true SU321081A1 (en) | 1979-01-05 |
Family
ID=20449155
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU6901392215A SU321081A1 (en) | 1969-12-29 | 1969-12-29 | Method of decomposing aluminate solutions |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU321081A1 (en) |
-
1969
- 1969-12-29 SU SU6901392215A patent/SU321081A1/en active
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