SU311450A1 - METHOD OF PREPARATION OF PHOSPHORIC ACID - Google Patents
METHOD OF PREPARATION OF PHOSPHORIC ACIDInfo
- Publication number
- SU311450A1 SU311450A1 SU1394372A SU1394372A SU311450A1 SU 311450 A1 SU311450 A1 SU 311450A1 SU 1394372 A SU1394372 A SU 1394372A SU 1394372 A SU1394372 A SU 1394372A SU 311450 A1 SU311450 A1 SU 311450A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- phosphoric acid
- preparation
- stage
- sulfuric acid
- decomposition
- Prior art date
Links
- NBIIXXVUZAFLBC-UHFFFAOYSA-N phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 title description 18
- 229910000147 aluminium phosphate Inorganic materials 0.000 title description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 12
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L Calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 10
- 235000021317 phosphate Nutrition 0.000 description 7
- 235000011132 calcium sulphate Nutrition 0.000 description 5
- 238000000354 decomposition reaction Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 239000007787 solid Substances 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K [O-]P([O-])([O-])=O Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 239000001175 calcium sulphate Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- QORWJWZARLRLPR-UHFFFAOYSA-H Tricalcium phosphate Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000001506 calcium phosphate Substances 0.000 description 1
- 229910000389 calcium phosphate Inorganic materials 0.000 description 1
- 235000011010 calcium phosphates Nutrition 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000005712 crystallization Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- VSIIXMUUUJUKCM-UHFFFAOYSA-D pentacalcium;fluoride;triphosphate Chemical compound [F-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O VSIIXMUUUJUKCM-UHFFFAOYSA-D 0.000 description 1
- 239000002367 phosphate rock Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
Description
Изобретение относитс к иереработке фосфоритов в фосфорную кислоту.This invention relates to the recovery of phosphate rock to phosphoric acid.
Известен способ получени фосфорной кислоты разложением природны.х фосфатов серной кислотой при 70-85°С с последующим отделением сульфата кальци . Однако выход целевого продукта недостаточно высок (не более 96%) вследствие нлохой растворимости нриродных фосфатов в серной кислоте и потери PzOs при сов.местной кристаллизации фосфата и сульфата кальци , кроме того, скорость процесса мала и трудно получить крупнокристаллический хорошо фильтрующийс осадок сульфата кальци .A known method for producing phosphoric acid is the decomposition of natural phosphates with sulfuric acid at 70-85 ° C, followed by the separation of calcium sulfate. However, the yield of the target product is not high enough (no more than 96%) due to the poor solubility of natural phosphates in sulfuric acid and the loss of PzOs during the combined crystallization of calcium phosphate and calcium sulphate. Moreover, the process rate is small and it is difficult to obtain a coarse, well-filtered calcium sulphate precipitate.
Дл увеличени выхода целевого продукта и интенсификации ироцесса предлагаетс разложение природных фосфатов серной кислотой осуществл ть в среде пульпы продукта, содержащей пе менее 30-35% твердых частиц , а две ступени при концентрации серной кислоты на первой ступени 30-120 г/л и на второй 10-30 г/л. Отделение сульфата кальци производ т преи.мущественно после второй ступени ироцесса, а часть полученной фосфорной кислоты возвращают в голову процесса.To increase the yield of the target product and intensify the process, the decomposition of natural phosphates with sulfuric acid is proposed to be carried out in the pulp medium of the product containing less than 30-35% solids, and two steps with a concentration of sulfuric acid in the first step 30-120 g / l and the second 10-30 g / l. The separation of calcium sulfate is performed primarily after the second stage of the process, and part of the phosphoric acid obtained is returned to the head of the process.
Выход фосфорной кислоты по предлагаемому способу близок к 99%, содержание РоО-, в отдел емом гипсе не превышает 0,3%. Способ может быть использован дл разло/кенн мало реакцнонноспособных фосфатов и позвол ет получать фосфорную кислоту с различпым содержанием сульфат-иона.The yield of phosphoric acid according to the proposed method is close to 99%, the content of RoO-, in the separated gypsum does not exceed 0.3%. The method can be used for decomposition / kenn of little reactive phosphates and allows to obtain phosphoric acid with a different content of sulfate ion.
В аппарат с перемешивающим устройством ввод т 100 ч./час природного фосфата и :. 93%-иой серной кислоты, смешанной с разбавленной фосфорной кис.11отой. Реакцию осуществл ют в среде пульпы продукта, содержащей 36% твердых частиц. Концентраци серной кислоты на первой ступени реакции 75 г/л, на второй ступени 25 г/л. Продолжительность растворени фосфата па первой ступени при 72°С 5 час 40 мин, врем пребывани материала на второй ступени 1 час 10 мин. Выход фосфорной кислоты 100 hours / hour of natural phosphate are introduced into the apparatus with a stirrer and:. 93% sulfuric acid mixed with dilute phosphoric acid. The reaction is carried out in a pulp medium containing 36% solids. The concentration of sulfuric acid in the first reaction stage is 75 g / l, in the second stage, 25 g / l. The duration of phosphate dissolution in the first stage at 72 ° C is 5 hours and 40 minutes; the residence time of the material in the second stage is 1 hour and 10 minutes. Phosphoric acid yield
99,10/ 70увеличени выхода целевого продукта и интенсификации процесса, разложение фосфатов осуществл ют в среде пульпы продукта с содержапием твердых частиц не менее 30- 35% в две ступени, при концентрации серной5 99.10 / 70 increase the yield of the target product and intensify the process; the decomposition of phosphates is carried out in the pulp medium of the product with a solids content of at least 30–35% in two stages, at a sulfur concentration of 5
.. ,.,,,.v --..,. ,,,. v -
-. -.
., .. /Л;. 311450 кислоты на первой ступени 30-120 г/л и на второй 10-30 г/л, с рециркул цией части фосфорной кислоты и выделением сульфата кальци предпочтительно после второй ступени разложени .., .. / L ;. 3,11450 acids at the first stage of 30-120 g / l and at the second 10-30 g / l, with recycling part of phosphoric acid and release of calcium sulfate, preferably after the second stage of decomposition.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU311450A1 true SU311450A1 (en) |
Family
ID=
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2608465A (en) | Process of producing lithium sulfate from lithium phosphates | |
| CA1168834A (en) | Purified monammonium phosphate process | |
| SU311450A1 (en) | METHOD OF PREPARATION OF PHOSPHORIC ACID | |
| RU2739409C1 (en) | Method of extracting rare-earth elements from phosphogypsum | |
| GB2142614A (en) | Process for removing impurities from wet process phosphoric acid | |
| GB2100749A (en) | Treating molasses | |
| US1916429A (en) | Method of producing mixed fertilizers | |
| US3442609A (en) | Process of purifying phosporic acid | |
| RU2812559C1 (en) | Method of producing monoammonium phosphate | |
| SU378002A1 (en) | METHOD OF PREPARATION OF PHOSPHORIC ACID | |
| US3726660A (en) | Nitrophosphate fertilizer production | |
| US1910808A (en) | Process of preparing phosphoric acid | |
| RU2785813C1 (en) | Method for production of monopotassium phosphate | |
| SU353396A1 (en) | ||
| SU783294A1 (en) | Method of producing complex fertilizer | |
| SU945076A1 (en) | Process for purifying phosphogypsum | |
| SU239355A1 (en) | METHOD OF OBTAINING SUPERPHOSPHATE FERTILIZERS | |
| CN116745238A (en) | Integrated process for cadmium removal of phosphoric acid | |
| US1945914A (en) | Production of water-soluble phosphate compounds | |
| SU264367A1 (en) | METHOD FOR PRODUCING PHOSPHORIC ACIDS! | |
| SU189808A1 (en) | Method of producing phosphoric acid from poor phosphorous ores | |
| SU1747431A1 (en) | Method of preparing liquid complex manures | |
| SU1647000A1 (en) | Process for preparing monoammonium phosphate | |
| SU842018A1 (en) | Method of producing phosphoric acid | |
| SU906976A1 (en) | Process for producing diammoonium phosphate |