CN1083034A - The production method of ammonium potassium dihydrogen phosphate - Google Patents
The production method of ammonium potassium dihydrogen phosphate Download PDFInfo
- Publication number
- CN1083034A CN1083034A CN 92108206 CN92108206A CN1083034A CN 1083034 A CN1083034 A CN 1083034A CN 92108206 CN92108206 CN 92108206 CN 92108206 A CN92108206 A CN 92108206A CN 1083034 A CN1083034 A CN 1083034A
- Authority
- CN
- China
- Prior art keywords
- dihydrogen phosphate
- controlled
- ammonium
- production method
- phosphate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- KYAXVUURGCWDJW-UHFFFAOYSA-N [K].P(=O)(O)(O)[O-].[NH4+] Chemical compound [K].P(=O)(O)(O)[O-].[NH4+] KYAXVUURGCWDJW-UHFFFAOYSA-N 0.000 title claims description 11
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 24
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 22
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 claims description 15
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 239000012535 impurity Substances 0.000 claims description 7
- 229910000387 ammonium dihydrogen phosphate Inorganic materials 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 6
- 235000019837 monoammonium phosphate Nutrition 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 238000002425 crystallisation Methods 0.000 claims description 5
- 238000005649 metathesis reaction Methods 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 5
- 239000012141 concentrate Substances 0.000 claims description 4
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 3
- 238000013019 agitation Methods 0.000 claims description 3
- 238000005119 centrifugation Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000006386 neutralization reaction Methods 0.000 claims description 3
- 239000001103 potassium chloride Substances 0.000 claims description 3
- 235000011164 potassium chloride Nutrition 0.000 claims description 3
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 3
- 235000011152 sodium sulphate Nutrition 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 230000008025 crystallization Effects 0.000 claims description 2
- 238000004176 ammonification Methods 0.000 claims 1
- 238000002360 preparation method Methods 0.000 claims 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 239000000706 filtrate Substances 0.000 description 4
- 229910052700 potassium Inorganic materials 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 3
- 239000003337 fertilizer Substances 0.000 description 3
- 239000000395 magnesium oxide Substances 0.000 description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 3
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 3
- 239000011591 potassium Substances 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 239000012452 mother liquor Substances 0.000 description 2
- 239000002367 phosphate rock Substances 0.000 description 2
- 150000003016 phosphoric acids Chemical class 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 238000003828 vacuum filtration Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000004254 Ammonium phosphate Substances 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- WZLMXYBCAZZIRQ-UHFFFAOYSA-N [N].[P].[K] Chemical compound [N].[P].[K] WZLMXYBCAZZIRQ-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 235000012538 ammonium bicarbonate Nutrition 0.000 description 1
- 229910000148 ammonium phosphate Inorganic materials 0.000 description 1
- 235000019289 ammonium phosphates Nutrition 0.000 description 1
- QLULGSLAHXLKSR-UHFFFAOYSA-N azane;phosphane Chemical compound N.P QLULGSLAHXLKSR-UHFFFAOYSA-N 0.000 description 1
- 239000003637 basic solution Substances 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
- 230000007812 deficiency Effects 0.000 description 1
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- NTTOTNSKUYCDAV-UHFFFAOYSA-N potassium hydride Chemical compound [KH] NTTOTNSKUYCDAV-UHFFFAOYSA-N 0.000 description 1
- 229910000105 potassium hydride Inorganic materials 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(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
- 238000003809 water extraction Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B13/00—Fertilisers produced by pyrogenic processes from phosphatic materials
- C05B13/06—Alkali and alkaline earth meta- or polyphosphate fertilisers
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Fertilizers (AREA)
Abstract
一种磷酸二氢钾铵的生产方法，包括以下工艺流 程：1.以湿法磷酸为原料制备磷酸二氢铵溶液；2.磷 酸二氢铵与氯化钾复分解；3.冷却结晶；4.离心分离； 5.干燥。磷酸二氢铵溶液与氯化钾复分解时，氯化钾 ∶磷酸二氢铵＝0.7～1，反应温度50℃～80℃，冷却 结晶温度-10°～30℃。本发明提供的方法拓宽了 原料来源，有利于我国磷矿资源的开发利用，产品含 N＞5％、P2O5＞50％、K2O＞18％，总收得率达到了 60～80％，而氯含量小于2％，生产成本降低20～ 30％。A production method of potassium dihydrogen phosphate ammonium, comprising the following technological process: 1. using wet-process phosphoric acid as raw material to prepare ammonium dihydrogen phosphate solution; 2. double decomposition of ammonium dihydrogen phosphate and potassium chloride; 3. cooling crystallization; 4. Centrifugal separation; 5. Drying. During double decomposition of ammonium dihydrogen phosphate solution and potassium chloride, potassium chloride:ammonium dihydrogen phosphate=0.7～1, reaction temperature 50°C～80°C, cooling crystallization temperature -10°～30°C. The method provided by the invention broadens the source of raw materials and is beneficial to the development and utilization of phosphate rock resources in China. The product contains N>5%, P2O5 >50%, K2O >18%, and the total yield reaches 60-60%. 80%, while the chlorine content is less than 2%, and the production cost is reduced by 20-30%.
Description
The invention belongs to high-concentration fertilizer and make the field, relate to a kind of production method of ammonium potassium dihydrogen phosphate.
The suitability for industrialized production ammonium potassium dihydrogen phosphate mainly contains two kinds of methods at present: a kind of is with preparing primary ammonium phosphate with thermal phosphoric acid in the bicarbonate of ammonia, then primary ammonium phosphate and Repone K being carried out metathesis and obtain ammonium potassium dihydrogen phosphate; Another kind is to be raw material with agricultural ammonium phosphate, with its water extraction, gets its extraction liquid and Repone K reaction production ammonium potassium dihydrogen phosphate.The weak point of above-mentioned two kinds of methods is that raw materials cost is higher, causes the cost height of product.
The objective of the invention is to overcome the deficiencies in the prior art, providing a kind of is the method for raw material production ammonium potassium dihydrogen phosphate with phosphoric acid by wet process, to reduce production costs, widens the starting material source, makes full use of china natural resources.
Phosphoric acid by wet process is directly by phosphorus ore extraction and obtain, and more in view of the mid low grade phosphate rock of China, so the content of impurity is also more in the phosphoric acid by wet process, and its major impurity is silicofluoric acid (H
2SiF
6), aluminium sesquioxide (Al
2O
3), ferric oxide (Fe
2O
3) and magnesium oxide (MgO).At the characteristics of phosphoric acid by wet process, method provided by the present invention comprises following technical process:
1, with the phosphoric acid by wet process is the feedstock production ammonium dihydrogen phosphate
The operation of this flow process is defluorinate, filtration, neutralization, filtration and concentrates.
The defluorinate of phosphoric acid by wet process adds Repone K or sodium sulfate, makes silicofluoric acid generate potassium silicofluoride (sodium) precipitation and removes.Required by defluorinate, the add-on of potassium hydride KH is that 100～140%(is by stoichiometry), the add-on of sodium sulfate is that 120～160%(is by stoichiometry), temperature of reaction is controlled at 25 °～50 ℃.
Filtering for the first time is to remove potassium silicofluoride or Sodium Silicofluoride, can adopt centrifugal separation.
Neutralization is under agitation to feed gas ammonia in filtrate, and the pH value of solution value is controlled at 3.0～5.0.This operation can form primary ammonium phosphate, the also further removal of impurity, and in this kind basic solution, Fe
++, Al
++, Mg
++The phosphoric acid salt that can generate Deng impurity and precipitating.
Filtering for the second time is to remove Fe
++, Al
++, Mg
++Deng the phosphoric acid salt that impurity generates, adopt vacuum filtration or centrifuging, filter residue can send phosphorus ammonium Workshop Production ammophos.
Concentrating is to remove water unnecessary in the filtrate, makes the water content in the ammonium dihydrogen phosphate just in time satisfy metathetic requirement, and this is one critical process, and it directly has influence on the carrying out of next flow process.Through repetition test, the content of primary ammonium phosphate should be controlled at 40～60% in the solution.
2, primary ammonium phosphate and Repone K metathesis
This flow process is will solid potassium chloride directly to add to concentrate in the good ammonium dihydrogen phosphate and under agitation carry out, and the add-on of Repone K is according to Repone K (Kcl): primary ammonium phosphate (NH
4H
2PO
4)=0.7～1(mol ratio) calculates, but, only be applicable to the Repone K that purity is high according to the determined Repone K add-on of following formula,, then need after suitable purifying treatment, to press earlier following formula and calculate for impure more Repone K (as agricultural potassium chloride).Metathetic temperature of reaction is controlled at 50 °～80 ℃.
3, crystallisation by cooling
The Tc of this flow process is controlled at-10 °～30 ℃, and cooling rate is controlled at 0.3 °～3 ℃/minute, stops 0.5～1 hour in Tc during crystallization.
4, centrifugation
This flow process is that the ammonium potassium dihydrogen phosphate precipitation is separated with mother liquor, and isolated mother liquor can be used as other multiple fertile raw material, also can directly be condensed into the multiple fertilizer of solid nitrogen potassium phosphorus.
5, drying
The present invention has the following advantages:
1, compare with existing method, cost can reduce by 20～30%.
2, go out ammonium potassium dihydrogen phosphate with impure more Wet-process Phosphoric Acid Production, help the development and use of China's phosphate rock resource, widened the starting material source.
3, determined the optimum concn of ammonium dihydrogen phosphate and the add-on of Repone K, the product that metathesis is obtained has reached 60～80% recovery rates, and cl content meets the requirement of no chlorine fertilizer less than 2%.
Fig. 1 is a process flow sheet of the present invention.
Embodiment:
The composition of used phosphoric acid by wet process is: P
2O
522%, F1.0%, Al
2O
30.86%, MgO 0.85%, Fe
2O
30.25%.
Get 1000 kilograms of phosphoric acid by wet processes, add the required Repone K of defluorinate by stoichiometry 120%, in 50 ℃ of reactions, precipitation, the elimination potassium silicofluoride, the feeding gas ammonia is till the pH=3.5 in filtrate, and vacuum filtration calcium phosphate precipitation impurity contains NH with filtrate being concentrated to
4H
2PO
440% is standby.
At 70 ℃, slowly add Repone K under constantly stirring, reach Kcl: NH
4H
2PO
4After=0.7 promptly the speed with 1 ℃/minute cool to 25 ℃ of Tcs, and insulated and stirred 0.5 hour.At last with the ammonium potassium dihydrogen phosphate centrifugation of separating out and be drying to obtain 220 kilograms of products.Contain N5%, P in the product
2O
554%, K
2O18%, Cl＜2%.
Claims (3)
1, a kind of production method of ammonium potassium dihydrogen phosphate, technical process comprises primary ammonium phosphate and Repone K metathesis, crystallisation by cooling, centrifugation and drying, the crystallisation by cooling temperature is controlled at-10 °～30 ℃, cooling rate is controlled at 0.3 °～3 ℃/minute, stopped 0.5～1 hour in Tc during crystallization, it is characterized in that:
(1) preparation of ammonium dihydrogen phosphate is a raw material with the phosphoric acid by wet process that contains plurality of impurities, its operation is defluorinate, filtration, neutralization, filtration and concentrates, in and the time ammonification, pH value is controlled at 3.0～5.0, when concentrated in the solution content of primary ammonium phosphate be controlled at 40～60%.
(2) will solid potassium chloride directly add and concentrate in the good ammonium dihydrogen phosphate and under agitation carry out metathesis, its add-on is according to Repone K (KCl): primary ammonium phosphate (NH
4H
2PO
4Calculate)=0.7～1 (mol ratio), and temperature of reaction is controlled at 50 °～80 ℃.
2, production method according to claim 1 is characterized in that adding the Repone K defluorinate, and its add-on is that 100～140%(is by stoichiometry), temperature of reaction is controlled at 25 °～50 ℃.
3, production method according to claim 1 is characterized in that adding the sodium sulfate defluorinate, and its add-on is that 120～160%(is by stoichiometry), temperature of reaction is controlled at 25 °～50 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92108206 CN1083034A (en) | 1992-07-13 | 1992-07-13 | The production method of ammonium potassium dihydrogen phosphate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92108206 CN1083034A (en) | 1992-07-13 | 1992-07-13 | The production method of ammonium potassium dihydrogen phosphate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1083034A true CN1083034A (en) | 1994-03-02 |
Family
ID=4943328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92108206 Pending CN1083034A (en) | 1992-07-13 | 1992-07-13 | The production method of ammonium potassium dihydrogen phosphate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1083034A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101343206B (en) * | 2008-09-05 | 2011-05-04 | 中国-阿拉伯化肥有限公司 | Process for preparing circular particle kalium based fertilizer |
| CN103011122A (en) * | 2012-12-28 | 2013-04-03 | 山东金正大生态工程股份有限公司 | Method for producing water-soluble potassium ammonium phosphate from wet-process phosphoric acid |
| CN103030129A (en) * | 2012-12-28 | 2013-04-10 | 贵州金正大生态工程有限公司 | Method for producing water-soluble ammonium potassium phosphate fertilizer with wet-method phosphoric acid |
| CN103641574A (en) * | 2013-12-25 | 2014-03-19 | 黄明科 | Method for producing chemically synthesized water soluble fertilizer |
| CN104386664A (en) * | 2014-10-30 | 2015-03-04 | 成都化工股份有限公司 | Method for producing ammonium potassium dihydrogen phosphate from fertilizer grade ammonium dihydrogen phosphate |
| CN104744175A (en) * | 2015-04-03 | 2015-07-01 | 武汉工程大学 | Method for producing nitrogen-phosphorus-potassium mixed fertilizer by utilizing phosphorus-potassium associated ore |
| CN105000539A (en) * | 2015-08-17 | 2015-10-28 | 四川大学 | Method for producing potassium dihydrogen phosphate and potassium-ammonium dihydrogen phosphate through wet process phosphoric acid |
| CN105149016A (en) * | 2015-10-29 | 2015-12-16 | 黄尚勋 | Method for achieving replacement reaction through resin-free autologous bed ion exchange method |
| CN105174237A (en) * | 2015-09-22 | 2015-12-23 | 贵州开磷集团股份有限公司 | Method for preparing sodium dihydrogen phosphate by means of phosphoric acid obtained by wet process |
| CN107161968A (en) * | 2017-05-31 | 2017-09-15 | 攀枝花火凤凰再生资源回收利用有限责任公司 | The method of comprehensive utilization of potassium in a kind of sintering flue dust |
| CN107720713A (en) * | 2017-10-29 | 2018-02-23 | 贵阳开磷化肥有限公司 | A kind of method that phosphoric acid by wet process prepares ammonium dihydrogen phosphate co-production potassium dihydrogen phosphate |
| CN115490541A (en) * | 2022-11-22 | 2022-12-20 | 云南缁磷工业技术有限公司 | A method for continuous production of potassium ammonium phosphate |
-
1992
- 1992-07-13 CN CN 92108206 patent/CN1083034A/en active Pending
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101343206B (en) * | 2008-09-05 | 2011-05-04 | 中国-阿拉伯化肥有限公司 | Process for preparing circular particle kalium based fertilizer |
| CN103030129B (en) * | 2012-12-28 | 2015-04-08 | 贵州金正大生态工程有限公司 | Method for producing water-soluble ammonium potassium phosphate fertilizer with wet-method phosphoric acid |
| CN103011122A (en) * | 2012-12-28 | 2013-04-03 | 山东金正大生态工程股份有限公司 | Method for producing water-soluble potassium ammonium phosphate from wet-process phosphoric acid |
| CN103030129A (en) * | 2012-12-28 | 2013-04-10 | 贵州金正大生态工程有限公司 | Method for producing water-soluble ammonium potassium phosphate fertilizer with wet-method phosphoric acid |
| CN103011122B (en) * | 2012-12-28 | 2014-08-20 | 金正大生态工程集团股份有限公司 | Method for producing water-soluble potassium ammonium phosphate from wet-process phosphoric acid |
| CN103641574B (en) * | 2013-12-25 | 2016-03-30 | 黄明科 | A kind of production method of chemosynthesis water-soluble fertilizer |
| CN103641574A (en) * | 2013-12-25 | 2014-03-19 | 黄明科 | Method for producing chemically synthesized water soluble fertilizer |
| CN104386664A (en) * | 2014-10-30 | 2015-03-04 | 成都化工股份有限公司 | Method for producing ammonium potassium dihydrogen phosphate from fertilizer grade ammonium dihydrogen phosphate |
| CN104386664B (en) * | 2014-10-30 | 2016-02-17 | 成都化工股份有限公司 | The method of ammonium potassium dihydrogen phosphate produced by fertilizer grade primary ammonium phosphate |
| CN104744175A (en) * | 2015-04-03 | 2015-07-01 | 武汉工程大学 | Method for producing nitrogen-phosphorus-potassium mixed fertilizer by utilizing phosphorus-potassium associated ore |
| CN104744175B (en) * | 2015-04-03 | 2017-09-29 | 武汉工程大学 | The method that nitrogen-phosphorus-potassium compound fertilizer is produced using phosphorus potassium associated minerals |
| CN105000539A (en) * | 2015-08-17 | 2015-10-28 | 四川大学 | Method for producing potassium dihydrogen phosphate and potassium-ammonium dihydrogen phosphate through wet process phosphoric acid |
| CN105174237A (en) * | 2015-09-22 | 2015-12-23 | 贵州开磷集团股份有限公司 | Method for preparing sodium dihydrogen phosphate by means of phosphoric acid obtained by wet process |
| CN105149016A (en) * | 2015-10-29 | 2015-12-16 | 黄尚勋 | Method for achieving replacement reaction through resin-free autologous bed ion exchange method |
| CN107161968A (en) * | 2017-05-31 | 2017-09-15 | 攀枝花火凤凰再生资源回收利用有限责任公司 | The method of comprehensive utilization of potassium in a kind of sintering flue dust |
| CN107720713A (en) * | 2017-10-29 | 2018-02-23 | 贵阳开磷化肥有限公司 | A kind of method that phosphoric acid by wet process prepares ammonium dihydrogen phosphate co-production potassium dihydrogen phosphate |
| CN107720713B (en) * | 2017-10-29 | 2020-11-20 | 贵阳开磷化肥有限公司 | Method for preparing ammonium dihydrogen phosphate and co-producing potassium dihydrogen phosphate by wet-process phosphoric acid |
| CN115490541A (en) * | 2022-11-22 | 2022-12-20 | 云南缁磷工业技术有限公司 | A method for continuous production of potassium ammonium phosphate |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110817911B (en) | Method for preparing gypsum whisker, magnesium chloride, ammonium magnesium phosphate and ammonium chloride from phosphate tailings | |
| CN102718200B (en) | Method for preparing industrial-grade phosphoric acid by decomposing mid-low-grade phosphorite with nitric acid | |
| CN105600763B (en) | A kind of method that fluoride salt method of purification produces industrial monoammonium phosphate | |
| CN111086977B (en) | Method for preparing MCP and MDCP (Madin-Darby Canine phosphate) by using raffinate acid | |
| CN106185855B (en) | A kind of feed grade phosphoric acid by wet process deep-purifying method | |
| CN112624074B (en) | Method for producing industrial grade monoammonium phosphate, monopotassium phosphate and fertilizer grade monoammonium phosphate from raffinate | |
| CN1083034A (en) | The production method of ammonium potassium dihydrogen phosphate | |
| CN103011122B (en) | Method for producing water-soluble potassium ammonium phosphate from wet-process phosphoric acid | |
| CN1063157C (en) | Production method of industrial monoammonium phosphate and industrial monoammonium phosphate and feed calcium hydrogen phosphate | |
| CN107720713A (en) | A kind of method that phosphoric acid by wet process prepares ammonium dihydrogen phosphate co-production potassium dihydrogen phosphate | |
| CN110745803A (en) | Method for preparing potassium dihydrogen phosphate from wet-process phosphoric acid | |
| CN113387374B (en) | Potassium removal process of ore lithium extraction production system | |
| CN105000539A (en) | Method for producing potassium dihydrogen phosphate and potassium-ammonium dihydrogen phosphate through wet process phosphoric acid | |
| CN1064858A (en) | Coproduction of fertilizer grade and pure monoammonium phosphate by wet-process phosphoric acid | |
| US3401014A (en) | Preparation of pure monocalcium phosphate | |
| US4222990A (en) | Production of fluoride-free phosphates | |
| CN115872377A (en) | A method for removing impurities with high magnesium phosphoric acid | |
| GB2142614A (en) | Process for removing impurities from wet process phosphoric acid | |
| CN1376635A (en) | Process for preparing phosphoric acid from waste sulfuric acid as by-product of titanium oxide powder by wet method | |
| US4160657A (en) | Preparation of monocalcium phosphate and phosphoric acid | |
| CN114988380A (en) | Method for producing food-grade monopotassium phosphate and co-producing high-purity gypsum by using feed-grade calcium hydrophosphate | |
| US4086322A (en) | Production of fluoride-free phosphates | |
| EP1171382A1 (en) | Process for production of phosphoric acid by crystallisation of phosphoric acid hemihydrate | |
| CA1066020A (en) | Process for obtaining pure orthophosphoric acid from superphosphoric acid | |
| US1961127A (en) | Making disodium phosphate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |