SU264367A1 - METHOD FOR PRODUCING PHOSPHORIC ACIDS! - Google Patents
METHOD FOR PRODUCING PHOSPHORIC ACIDS!Info
- Publication number
- SU264367A1 SU264367A1 SU1234952A SU1234952A SU264367A1 SU 264367 A1 SU264367 A1 SU 264367A1 SU 1234952 A SU1234952 A SU 1234952A SU 1234952 A SU1234952 A SU 1234952A SU 264367 A1 SU264367 A1 SU 264367A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- arc
- phosphoric acid
- acid
- phosphoric acids
- phosphate
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title description 2
- 150000003016 phosphoric acids Chemical class 0.000 title 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-N phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 20
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 14
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 10
- NBIIXXVUZAFLBC-UHFFFAOYSA-K [O-]P([O-])([O-])=O Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 5
- 239000002253 acid Substances 0.000 description 5
- 239000010452 phosphate Substances 0.000 description 5
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L Calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 4
- 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 4
- 239000001506 calcium phosphate Substances 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- 239000000706 filtrate Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229910000150 monocalcium phosphate Inorganic materials 0.000 description 3
- 235000019691 monocalcium phosphate Nutrition 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- QVLTXCYWHPZMCA-UHFFFAOYSA-N PO4-PO4 Chemical compound OP(O)(O)=O.OP(O)(O)=O QVLTXCYWHPZMCA-UHFFFAOYSA-N 0.000 description 2
- 229910052586 apatite Inorganic materials 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium monoxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 description 2
- 239000001184 potassium carbonate Substances 0.000 description 2
- 229910000027 potassium carbonate Inorganic materials 0.000 description 2
- 239000001187 sodium carbonate Substances 0.000 description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-N Carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 241000238366 Cephalopoda Species 0.000 description 1
- AQSJGOWTSHOLKH-UHFFFAOYSA-N Phosphite Chemical class [O-]P([O-])[O-] AQSJGOWTSHOLKH-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 229910000389 calcium phosphate Inorganic materials 0.000 description 1
- 235000011010 calcium phosphates Nutrition 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000005712 crystallization Effects 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002367 phosphate rock Substances 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 150000003112 potassium compounds Chemical class 0.000 description 1
- KEAYESYHFKHZAL-UHFFFAOYSA-N sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 150000003388 sodium compounds Chemical class 0.000 description 1
- 239000007790 solid phase Substances 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
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Description
Изобретение относитс к области лолучеиш фосфорной кислоты сернокислотным способом .This invention relates to the field of phosphoric acid la-acid by the sulfuric acid method.
Известен способ нолученн коицентрированной фосфорной кислоты разложением фосфоритОВ оборотной фосфор.иой кислотой в виде нульпы, содержащей пор дка 40% Р2О.-„ при темиературе выше 80°С с иоследующим разложеннем полученной суспензии люнокальцийфосфата серной кислотой ирл 80-105°С с получением иолугндрата сульфата кальци . Однако осуществление иолугидратното способа производства ко1щеитрирова11иой фосфорной кислоты при высокой температуре (более 94°С) в зоне ipeaKiuni ускор ет коррозию а-ппаратуры , требует интенсивного разогрева системы в процессе иуска. С другой стороны, осуществление снособа нри темнературе ииже 100°С св зано с (выделением в твердую фазу полугидрата сульфата кальци , который сравнительно нло.хо фильтруетс , что не обеспечнвает достаточно полной отмьшки осадка от фосфорной кислоты.The known method of obtaining the co-centered phosphoric acid by decomposing phosphorites with circulating phosphorus acid in the form of a null containing about 40% P2O.- "at temperature above 80 ° C with subsequent decomposition of the resulting suspension of lunocalcium phosphate with sulfuric acid Irl 80-105 ° C to produce a arc and a wave and a arc and a rain and a arc of a arc and a arc of a lunar phosphate with a sulfuric acid concentration of 80–105 ° C will be obtained and a arc and a arc of a lunar calcium phosphate with a sulfuric acid Irl of 80–105 ° C will be obtained and a arc and a arc of a arc and a arc of a rain and a mole of a lunar phosphate with a sulfuric acid of 80–105 ° C will be obtained and a arc and a hollow pulp will be spent and a wave and a arc and a arc of a rain and a arc will be 80 and 105 degrees and a arc and a arc of a rain and phosphoric acid phosphoric acid should be 80–105 ° C. calcium. However, the implementation of the i-hydrate method of producing coconitrile phosphoric acid at a high temperature (over 94 ° C) in the ipeaKiuni zone accelerates the corrosion of the a-equipment, requires intensive heating of the system during the process. On the other hand, the implementation of the removal at temperaure and below 100 ° C is associated with (isolation of calcium sulfate in the solid phase of the hemihydrate, which is comparatively poor, is filtered, which does not ensure a sufficiently complete removal of the precipitate from phosphoric acid.
фориой кислотой в присутствии соедипеннй кали илН натри , апри.мер карбоната натри , карбоната кали или и.х смеси.forioic acid in the presence of sodium compound or sodium, aprimer sodium carbonate, potassium carbonate, or ix mixture.
Иредлагаемый способ позвол ет снизить температуру ia стадии сернокислотного разложени лульиы монокальцийфосфата до 70-92°С, увеличить производительность фильтрации по сухому отмытому осадку гюлугидрата сульфата кальци до 1300 кг/см-час и выще, обеспечить степень отмывки осадка не ниже 96-98Ve при получении фосфорной кислоты концентрацией 45% Р2О.-.The proposed method makes it possible to reduce the temperature ia of the stage of sulfuric acid decomposition of mono-calcium phosphate lula to 70-92 ° C, increase the filtration capacity of the dry washed precipitate of calcium sulfate hyulhydrate to 1300 kg / cm-hr and higher, to ensure the degree of precipitate washing not less than 96-98Ve upon receipt phosphoric acid concentration of 45% P2O.-.
1Иример. В первый реактор подают 100 кг апатитового концентрата, 1100 кг оборотной пульпы (ИЗ последнего реактора), 262,5 кг нервого фильтрата и 1-5 кг соды. Врем разложенн апатита 1,0-1,5 час.1Imermer. 100 kg of apatite concentrate, 1100 kg of circulating pulp (FROM the last reactor), 262.5 kg of nerve filtrate and 1-5 kg of soda are fed to the first reactor. The time of decomposition of apatite is 1.0-1.5 hours.
Далее пульпа в количестве 1450 кг поступает во второй реактор, куда подают 96,5 кг сер92 ,5% и 128 л-. ной кислоты ко1щентрацией слабой фосфорной кислоты со второй зоны фильтра. Врем разложени суспензии монокальцийфосфата 0,5-1,0 час.Next, the pulp in the amount of 1450 kg enters the second reactor, where 96.5 kg of sulfur 92, 5% and 128 liters are supplied. acid concentration of weak phosphoric acid from the second zone of the filter. The decomposition time of monocalcium phosphate suspension is 0.5-1.0 hours.
В результате фильтрации получают 341,5 кг фосфорной кислоты концентрацией 48э/с Р2О5, часть которой (262,5 кг) возвращают в .первый реа.ктор, а 79 кг вывод т в виде продукционной кислоты,As a result of filtration, 341.5 kg of phosphoric acid with a concentration of 48 e / s P2O5 are obtained, some of which (262.5 kg) is returned to the first rector, and 79 kg is removed as production acid,
npo jbiBKy осадка на фильтре провод т 82,4 кг гор чей воды и промежуточными фильтратами в три стадии.The npo jbiBKy filter cake carried out 82.4 kg of hot water and intermediate filtrates in three stages.
Слабый фильтрат в количестве 128 кг направл ют во второй реактор, осадок же в количестве 170 кг идет в отвал.A weak filtrate in the amount of 128 kg is sent to the second reactor, while the sediment in the amount of 170 kg goes to the dump.
Состав полученной фосфорной кислоты, %: РгОг, 48,0; СаО 0,1; 50 0,2-0,4; F 0,15- 0,7; КзОз il,3.The composition of the obtained phosphoric acid,%: РгОг, 48,0; CaO 0.1; 50 0.2-0.4; F 0.15-0.7; KzOz il, 3.
Предмет изобретени Subject invention
Способ получени фосфорной кислоты путем разложени фосфатного сырь оборотной фосфорной кислотой с последующей обработкой полученной пульпы монокальцийфосфата серной кислотой с кристаллизацией .полугидрата сульфата кальци и фильтрацией суспензи-и , отличающийс тем, что, с целью улучшени фильтрации полугидрата сульфата кальци , разложение фосфатного сырь оборотной фосфорной кислотой провод т в присутствии соединений патри или кали , на пример карбоната натр-и , карбоната кали или 1И.х смеси .A method of producing phosphoric acid by decomposing a phosphate raw material with circulating phosphoric acid followed by treating the resulting pulp of monocalcium phosphate with sulfuric acid with crystallization of calcium sulfate hemihydrate and filtering the suspension and, characterized in that, in order to improve the filtration of calcium sulfate hemihydrate, the phosphate raw material is decomposed into phosphoric phosphoric raw material phosphoric phosphoric acid phosphoric acid. carried out in the presence of patricium or potassium compounds, for example sodium carbonate, potassium carbonate or 1Ix mixture.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU264367A1 true SU264367A1 (en) |
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