SU548565A1 - The method of obtaining the extraction of phosphoric acid - Google Patents
The method of obtaining the extraction of phosphoric acidInfo
- Publication number
- SU548565A1 SU548565A1 SU2094965A SU2094965A SU548565A1 SU 548565 A1 SU548565 A1 SU 548565A1 SU 2094965 A SU2094965 A SU 2094965A SU 2094965 A SU2094965 A SU 2094965A SU 548565 A1 SU548565 A1 SU 548565A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- phosphoric acid
- suspension
- atm
- obtaining
- extraction
- Prior art date
Links
Landscapes
- Fertilizers (AREA)
Description
1one
Изобретение относитс к способу получени экстракционной фосфорной кислоты, котора примен етс при производстве фосфорных удобрений.The invention relates to a method for producing phosphoric acid, which is used in the production of phosphate fertilizers.
Известен способ получени экстракционной фосфорной кислоты путем разложени фосфатного сырь смесью серной и оборотной фосфорной кислот в присутствии кремневой кислоты или растворимых силикатов и затравки сульфата кальци с последующей фильтрацией суспензии и отделением осадка.A method is known for producing extraction phosphoric acid by decomposing a phosphate feedstock with a mixture of sulfuric and circulating phosphoric acids in the presence of silicic acid or soluble silicates and seeding calcium sulfate, followed by filtering the suspension and separating the precipitate.
Однако по такому способу имеетс высокое содержание фтора в продукте 0,4-0,7% 1.However, this method has a high fluorine content in the product of 0.4-0.7% 1.
Известен способ получени экстракционной фосфорной кислоты путем разложени фосфатного сырь смесью серной и оборотной фосфорной кислот под давлением при температуре 110-140°С с последующим охлаждением суспензии, фильтрацией ее и отделением осадка фосфогипса.A method is known for producing extraction phosphoric acid by decomposing a phosphate raw material with a mixture of sulfuric and circulating phosphoric acid under pressure at a temperature of 110-140 ° C, followed by cooling the suspension, filtering it, and separating the phosphogypsum precipitate.
Недостатком этого способа также вл етс высокое содержание фтора в продукте 1,6- 1,8% 2.The disadvantage of this method is also a high content of fluorine in the product of 1.6-1.8% 2.
С целью снижени содержани фтора в продукте предложено суспензию после охлаждени диспергировать в объем, наход щийс под разр жением 0,003-0,027 атм, нредпочтительно 0,005 атм.In order to reduce the fluorine content in the product, it is proposed to disperse the suspension after cooling into a volume under the discharge of 0.003-0.027 atm, preferably 0.005 atm.
Способ позвол ет снизить содержание фтора в продукте до 0,1-0,2%.The method allows to reduce the fluorine content in the product to 0.1-0.2%.
Пример. 100 вес. ч. апатита и 150 вес. ч. 57%-ной серной кислоты подают в экстрактор, куда одновременно поступает 240 вес. ч. оборотной фосфорной кислоты. Суспензию перемешивают в течение 1 час. Температура в экстракторе повыщаетс до 75°С. Из экстрактора суспензию подают в выносной подогреватель, где под давлением 1,1 атм нагревают в течение 1,5 час до 110°С. После этого суспензиюExample. 100 weight. h. apatite and 150 wt. h. 57% sulfuric acid is fed into the extractor, which simultaneously receives 240 weight. h. circulating phosphoric acid. The suspension is stirred for 1 hour. The temperature in the extractor rises to 75 ° C. From the extractor, the suspension is fed to a remote heater, where it is heated under a pressure of 1.1 atm to 110 ° C for 1.5 hours. After this suspension
распыл ют в емкость, в которой поддерл-сивают разр жение 0,004 атм. Выдел ющиес при этом фтористые газы поступают на адсорбцию и переработку. Суспензию после распылени охлаладают до , затем подают наsprayed into a tank in which the discharge is maintained at 0.004 atm. The fluorine gases released in this process are sent for adsorption and processing. The spray after spraying is cooled to, then fed to
фильтр. Продукционна кислота содерл ит 35% PsOs и 0,Г% фтора.filter. Production acid contains 35% PsOs and 0, G% fluorine.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU2094965A SU548565A1 (en) | 1975-01-09 | 1975-01-09 | The method of obtaining the extraction of phosphoric acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU2094965A SU548565A1 (en) | 1975-01-09 | 1975-01-09 | The method of obtaining the extraction of phosphoric acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU548565A1 true SU548565A1 (en) | 1977-02-28 |
Family
ID=20606949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU2094965A SU548565A1 (en) | 1975-01-09 | 1975-01-09 | The method of obtaining the extraction of phosphoric acid |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU548565A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104401959A (en) * | 2014-10-13 | 2015-03-11 | 云南红富化肥有限公司 | Method for filtering phosphogypsum with dilute phosphoric acid for circulating washing |
-
1975
- 1975-01-09 SU SU2094965A patent/SU548565A1/en active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104401959A (en) * | 2014-10-13 | 2015-03-11 | 云南红富化肥有限公司 | Method for filtering phosphogypsum with dilute phosphoric acid for circulating washing |
| CN104401959B (en) * | 2014-10-13 | 2016-06-22 | 云南红富化肥有限公司 | A kind of method filtering ardealite employing light phosphoric acid circulation washing |
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