CN102126741A - Method for producing nitro/S-based compound fertilizer and coproducing plaster - Google Patents
Method for producing nitro/S-based compound fertilizer and coproducing plaster Download PDFInfo
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- CN102126741A CN102126741A CN 201110022223 CN201110022223A CN102126741A CN 102126741 A CN102126741 A CN 102126741A CN 201110022223 CN201110022223 CN 201110022223 CN 201110022223 A CN201110022223 A CN 201110022223A CN 102126741 A CN102126741 A CN 102126741A
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Abstract
The invention provides a method for producing a nitro/S-based compound fertilizer and coproducing plaster, belonging to the technical field of compound fertilizer production. The method comprises the following steps: after decomposing phosphorite with nitric acid, firstly filtering and removing the acid insoluble matters and organic suspended matters; adding industrial ammonium sulfate or sulfuric acid to the purified acidolysis solution to remove calcium and filtering the reaction solution to obtain the calcium removed byproduct, namely high-purity plaster, wherein the acidolysis solution after calcium removal is used for producing the nitro/S-based compound fertilizer; and mixing the calcium removed acidolysis solution with acid potassium sulfate to form mixed acid, subjecting the mixed acid to carry out neutralization reaction with ammonia to obtain slurry containing ammonium nitrate, monoammonium phosphate, ammonium sulfate and potassium sulfate and pelleting and drying the slurry to obtain the nitro/S-based compound fertilizer. The method has the following beneficial effects: the ammonium sulfate or sulfuric acid is used for removing calcium from the acidolysis solution obtained after decomposing phosphorite with the nitric acid, without bringing other foreign ions, and ammonia in the ammonium sulfate when the ammonium sulfate is used for removing calcium is retained in the finished product as nutrient; and the calcium removal rate of the acidolysis solution is high and is more than 95%.
Description
Technical field:
The present invention relates to a kind of nitric acid decomposing phosphate rock and produce the method for nitrate-based compound fertilizer by-product high purity gypsum, belong to composite fertilizer's production technical field, the method that is specifically related to nitric acid decomposing phosphate rock production composite fertilizer and produces high purity gypsum.
Background technology:
Sulphur (chlorine) base composite fertilizer that contains nitric nitrogen is called nitrate-based compound fertilizer.The principal feature that the nitric acid decomposing phosphate rock prepares compound fertilizer technology is that nitric acid has played dual function: both utilized the strongly-acid of nitric acid to come decomposing phosphate rock to produce phosphoric acid, replaced the sulfuric acid decomposing phosphate rock, saved sulfuric acid, itself stays its negatively charged ion in the product as the nitric nitrogen nutrient again, the utilization of fullest chemical reactant.
With the technology of nitric acid decomposing phosphate rock production composite fertilizer abroad as Europe and USSR (Union of Soviet Socialist Republics) employing be cold method.China uses cold method explained hereafter nitro-compound fertilizer that a family of a day ridge Coal Chemical Industry group company (former Shanxi fertilizer plant) is only arranged, and is to have introduced Norsk Hydro cold method nitrophosphate fertilizer device from Norway.This device is because of using the phosphorus ore production that domestic grade is low, foreign matter content is high, and nitrocalcite cold method separation difficulty still exists a lot of problems not solve at present on the technology, cause only this cover of domestic cold method nitrophosphate fertilizer device.The defective of this technology is huge, the long flow path of plant investment, to ingredient requirement harshness, complicated operation, the domestic phosphorus ore of device incompatibility etc.
Document 1 Chinese patent " a kind of processing method of producing high concentration nitric-phosphate fertilizer " (application number: 200910009223.3), it comprises the steps: that phosphorus ore adds nitric acid solution, acid non-soluble substance precipitate and separate, nitrocalcite freezing and crystallizing, nitrocalcite filtration, mother liquor neutralization, evaporation, granulation and drying, between nitrocalcite filtration and mother liquor neutralization, mother liquor degree of depth deliming step is arranged, this step comprises following process: I) the mother liquor degree of depth is removed mother liquor of calcium interpolation sulfuric acid or ammonium sulfate, and the calcium ion of mother liquor and sulfate ion generate the terra alba crystallization; II) the reaction slurry stage treatment adopts stage equipment that reaction slurry is carried out stage treatment, and the reaction slurry that has small-particle calcium sulfate returns the deliming of the mother liquor degree of depth, and the reaction slurry that has macrobead calcium sulfate is delivered to the calcium sulfate filtration; III) calcium sulfate filtering reaction slip filters through filter and washing, and during a first filtrate and a washing lotion are sent to and operation, two washing lotions are returned filter.
Document 2 Chinese patents " a kind of nitric acid decomposing rock phosphate with hydrogen is produced the method and the system thereof of nitro-compound fertilizer material " (application number: 200810215546.3), this method is a kind of method and system of preparing sulphur based compound fertilizer by decomposing rock phosphate with hydrogen nitrate, its step is as follows: the preparation of (1) sal enixum gets nitration mixture I; (2) nitric acid decomposing rock phosphate with hydrogen gets nitration mixture II; (3) nitration mixture I mixes with nitration mixture II; (4) with step (3) gained nitration mixture III and liquefied ammonia or gas ammonia reaction, get sulphur based compound fertilizer.
Above-mentioned existing method is all with the nitric acid decomposing phosphate rock and prepares the relevant production method of composite fertilizer, has close with the present invention or the part that communicates.But existing cold method technology is had relatively high expectations to phosphorus ore grade and foreign matter content, and freezing to remove nitrocalcite incomplete, and the decalcification rate is about 75%～80%, the nitrocalcite of by-product needs metathesis to produce lime carbonate, this technology can not be produced NPK composite fertilizer, and the flow operations complexity, invests huge.
The method of document 1 is the improvement to existing cold method nitrophosphate fertilizer technology, increased with sulfuric acid and ammonium sulfate degree of depth decalcification process, but the crystal of calcium sulfate that removes is tiny, needs classification is carried out in crystallization, mother liquor circulates in a large number, also will carry out metathesis to isolated calcium sulfate and be converted into lime carbonate.This technology can not be produced NPK composite fertilizer equally, and flow operations is complicated more, invests bigger.
In the method for document 2, sal enixum (nitration mixture I) is mixed with the acid hydrolysis solution (nitration mixture II) of nitric acid decomposing phosphate rock, make sulfate ion among the nitration mixture I and the calcium ion among the nitration mixture II produce calcium sulfate precipitation and remove calcium in the feed liquid.But this decalcification method is owing to there is the existence of potassium ion, the hydrofluoric acid in the acid hydrolysis solution can with its generation metathesis side reaction, produce insoluble potassium silicofluoride.Remove acid non-soluble substance, the organic seston contain behind the phosphorus ore acid hydrolysis in the calcium sulfate filtrate that this method is come out, also contain the potassium silicofluoride that side reaction produces.On the one hand calcium sulfate precipitation is carried secretly with the potassium silicofluoride precipitation and is taken away nutrient potassium, causes the loss of potassium, and the calcium sulfate impurity that comes out of this method is numerous on the other hand, can't further utilize, and can only stack as phosphogypsum.
Summary of the invention:
Purpose of the present invention, the shortcoming that be to overcome that existing cold method nitrophosphate fertilizer technical process complicated operation, investment are huge, the acid hydrolysis solution decalcification by-product calcium sulfate precipitation foreign matter content height of the shortcoming that can not produce NPK composite fertilizer and existing nitric acid decomposing phosphate rock can't fully utilize provides a kind of method of producing the nitrate-based compound fertilizer by-product gypsum.
The present invention is achieved like this: behind the nitric acid decomposing phosphate rock, earlier acid non-soluble substance and organic seston are removed by filter, acid hydrolysis solution after the purification adds industrial sulphuric acid ammonium or sulfuric acid decalcification, filters to obtain decalcification byproduct high purity gypsum, and the acid hydrolysis solution after the decalcification is used for producing nitrate-based compound fertilizer again.
A kind of method of producing the nitrate-based compound fertilizer by-product gypsum specifically may further comprise the steps:
(1) will carry out acidolysis reaction with nitric acid behind the phosphorus ore grinding;
(2) the thick acid hydrolysis solution that step (1) is obtained filters, and removes wherein acid non-soluble substance and organic seston, and filtrate is smart acid hydrolysis solution;
(3) smart acid hydrolysis solution adding ammonium sulfate or the sulfuric acid with step (2) carries out the replacement(metathesis)reaction decalcification, and reaction solution is filtered, and solid is a high purity gypsum, is gypsum product after washing drying, and filtrate is the decalcification acid hydrolysis solution;
(4) with the decalcification acid hydrolysis solution in the step (3) with become nitration mixture after sal enixum mixes, nitration mixture and gas ammonia neutralization reaction must contain the slip of ammonium nitrate, monoammonium phosphate, ammonium sulfate, vitriolate of tartar, slip obtains nitrate-based compound fertilizer through granulation, drying.
Foregoing method, preferably scheme is, and the nitric acid mass concentration is 40-70% in the step (1), and the optimization mass concentration is 55-65%, more optimizes 60%.
Foregoing method, preferred scheme be, the mol ratio 1 of calcium ion and nitric acid in phosphorus ore when step (1) is carried out acidolysis reaction: 2-3 is optimized for 1: 2-2.3.
Foregoing method, preferred scheme is that temperature of reaction was 45-70 ℃ when step (1) was carried out acidolysis reaction, was optimized for 55-60 ℃, more optimized 58 ℃.
Foregoing method, preferably scheme is, and it is 0.5-4 hour that step (1) is carried out the acidolysis reaction the reaction time, and optimal conditions is 1-2 hour.
Foregoing method, preferred scheme is that ammonium sulfate or sulfuric acid add-on are pressed the mol ratio 1-1.2 of calcium ion in sulfate ion and the smart acid hydrolysis solution in the step (3): 1.
Foregoing method, preferred scheme is that temperature of reaction was 55-60 ℃ when step (3) was carried out metathesis.
Foregoing method, preferred scheme is that it is 1-4 hour that step (3) is carried out the metathesis the reaction time, is optimized for 2-2.5 hour.
Foregoing method, preferred scheme is that the granulation mode is spray granulating, ammoniation-granulation, high tower prilling or biaxial granulation in the step (4).
Produce in the method for nitrate-based compound fertilizer by-product gypsum in the present invention, the add-on of sal enixum is allocated into by NPK content ratio requirement in the product in the step (4).Such as: to the product of potassium content at 8-10%, the add-on of sal enixum is the 23-30% of decalcification acid hydrolysis solution weight.
A kind of method of producing the nitrate-based compound fertilizer by-product gypsum, another technical thought are that the gained slip is produced powder-like product without granulation with the spraying drying mode in the step (4).
The present invention has following feature and beneficial effect:
(1) the present invention first filter acid insolubles and organic seston before the acid hydrolysis solution decalcification of nitric acid decomposing phosphate rock, decalcification byproduct terra alba (gypsum) purity is reached more than 99%, can be used as high purity gypsum such as mould gypsum, medical gypsum, filler, no phosphogypsum discharging realizes the comprehensive utilization of resource;
(2) acid hydrolysis solution of phosphorolytic cleavage phosphorus ore of the present invention removes calcium and uses ammonium sulfate or sulfuric acid, is not with other foreign ions of people, and the ammonia during with the ammonium sulfate decalcification in the ammonium sulfate is stayed in the finished product as nutrient;
(3) the decreasing ratio height of acidolysis liquid calcium of the present invention arrives more than 95%, and this is that cold method technology is incomparable;
(4) the present invention does not have freezing in the cold method technology, nitrocalcite to be converted into operations such as lime carbonate, simplified control, and investment significantly reduces;
(5) the present invention can produce the nitrate-based compound fertilizer that contains NPK.
Embodiment:
Describe technical scheme of the present invention in detail below in conjunction with embodiment, but protection domain is not by this restriction.
Raw materials usedly among the embodiment all can buy from market, used sal enixum is with Repone K and the sulfuric acid sal enixum (but reference 3 Chinese patents " production method of potassium sulphate type ternary composite fertilizer ") through the low temperature conversion preparation in the production of sulfur-based compound fertilizer
Embodiment 1: implement raw material: 1, ground phosphate rock: P
20
5Content is 30.72%, and CaO is 48.28%; 2, nitric acid: concentration 70%; 3, industrial sulphuric acid ammonium: ammonia content 21%.
The invention process process may further comprise the steps:
(1) carries out acidolysis reaction with 70% nitric acid after ground phosphate rock being added water, the mol ratio 1: 3 of calcium ion and nitric acid in the phosphorus ore; Temperature of reaction is 45 ℃, reacts 0.5 hour.
(2) the thick acid hydrolysis solution that step (1) is obtained filters, and removes wherein acid non-soluble substance and organic seston, and filtrate is smart acid hydrolysis solution.
(3) the smart acid hydrolysis solution of step (2) is added the industrial sulphuric acid ammonium and carry out replacement(metathesis)reaction, the ammonium sulfate add-on is pressed the mol ratio 1: 1 of calcium ion in sulfate ion and the smart acid hydrolysis solution; Temperature of reaction is 55 ℃; Reaction times is 1 hour.Reaction solution is filtered, and solid is a high purity gypsum, is the high purity gypsum product after washing drying; Filtrate is the decalcification acid hydrolysis solution.
(4) after being mixed, the decalcification acid hydrolysis solution in the step (3) and sal enixum (add-on of sal enixum be decalcification acid hydrolysis solution weight 23.5%) become nitration mixture, nitration mixture and gas ammonia neutralization reaction, the slip that must contain ammonium nitrate, monoammonium phosphate, ammonium sulfate, vitriolate of tartar, slip obtains nitrate-based compound fertilizer through spray granulating, drying.
Result of implementation: 1. high purity gypsum: the sulfate dihydrate calcium contents is 99.3% in the gypsum after testing; 2. nitrate-based compound fertilizer: total nitrogen content 21.5%, phosphorus (P
2O
5) content is 10.0%, potassium (K
2O) content is 8.5%.
Embodiment 2: implement raw material: 1, ground phosphate rock: P
2O
5Content is 29.85%, and CaO is 48.30%; 2, nitric acid: concentration 40%; 3, industrial sulphuric acid ammonium: ammonia content 21%.
The invention process process may further comprise the steps:
(1) carries out acidolysis reaction with 40% nitric acid after ground phosphate rock being added water, the mol ratio 1: 2 of calcium ion and nitric acid in the phosphorus ore; Temperature of reaction is 70 ℃, reacts 4 hours.
(2) the thick acid hydrolysis solution that step (1) is obtained filters, and removes wherein acid non-soluble substance and organic seston, and filtrate is smart acid hydrolysis solution.
(3) the smart acid hydrolysis solution of step (2) is added the industrial sulphuric acid ammonium and carry out replacement(metathesis)reaction, the ammonium sulfate add-on is pressed the mol ratio 1.2: 1 of calcium ion in ammonium sulfate and the smart acid hydrolysis solution; Temperature of reaction is 60 ℃; Reaction times is 4 hours.Reaction solution is filtered, and solid is a high purity gypsum, is the high purity gypsum product after washing drying; Filtrate is the decalcification acid hydrolysis solution.
(4) after being mixed, the decalcification acid hydrolysis solution in the step (3) and sal enixum (add-on of sal enixum be decalcification acid hydrolysis solution weight 26%) become nitration mixture, nitration mixture and gas ammonia neutralization reaction, the slip that must contain ammonium nitrate, monoammonium phosphate, ammonium sulfate, vitriolate of tartar, slip obtains nitrate-based compound fertilizer through ammoniation-granulation, drying.
Result of implementation: 1, high purity gypsum: the sulfate dihydrate calcium contents is 99.5% in the gypsum after testing; 2, nitre chlorine-based compound fertilizer: total nitrogen content 21.0%, phosphorus (P
2O
5) content is 10.0%, potassium (K
2O) content is 9.0%.
Embodiment 3: implement raw material: 1, ground phosphate rock: P
2O
5Content is 31.05%, and CaO is 47.65%; 2, nitric acid: concentration 60%; 3, industrial sulphuric acid: concentration 98%.
The invention process process may further comprise the steps:
(1) carries out acidolysis reaction with 60% nitric acid after ground phosphate rock being added water, the mol ratio 1: 2 of calcium ion and nitric acid in the phosphorus ore; Temperature of reaction is 50 ℃, reacts 1.5 hours.
(2) the thick acid hydrolysis solution that step (1) is obtained filters, and removes wherein acid non-soluble substance and organic seston, and filtrate is smart acid hydrolysis solution.
(3) the smart acid hydrolysis solution of step (2) is added industrial sulphuric acid and carry out replacement(metathesis)reaction, the sulfuric acid add-on is pressed the mol ratio 1.1: 1 of calcium ion in sulfate ion and the smart acid hydrolysis solution; Temperature of reaction is 60 ℃; Reaction times is 3 hours.Reaction solution is filtered, and solid is a high purity gypsum, is the high purity gypsum product after washing drying; Filtrate is the decalcification acid hydrolysis solution.
(4) the decalcification acid hydrolysis solution in the step (3) is allocated into sal enixum (add-on of sal enixum be decalcification acid hydrolysis solution weight 23%) back and gas ammonia neutralization reaction, composite fertilizer's slip of nitrogenous phosphorus potassium.Slip obtains nitrate-based compound fertilizer through biaxial granulation, drying, screening.
Result of implementation: 1, high purity gypsum: the sulfate dihydrate calcium contents is 99.2% in the gypsum after testing; 2, nitrate-based compound fertilizer: total nitrogen content 23.1%, phosphorus (P
2O
5) content is 9.0%, potassium (K
2O) content is 8.0%.
Embodiment 4: implement raw material: 1, ground phosphate rock: P
2O
5Content is 30.72%, and CaO is 48.28%; 2, nitric acid: concentration 65%; 3, industrial sulphuric acid ammonium: ammonia content 21%.
The invention process process may further comprise the steps:
(1) carries out acidolysis reaction with 65% nitric acid after ground phosphate rock being added water, the mol ratio 1: 2 of calcium ion and nitric acid in the phosphorus ore; Temperature of reaction is 58 ℃, reacts 1.5 hours.
(2) the thick acid hydrolysis solution that step (1) is obtained filters, and removes wherein acid non-soluble substance and organic seston, and filtrate is smart acid hydrolysis solution.
(3) the smart acid hydrolysis solution of step (2) is added the industrial sulphuric acid ammonium and carry out replacement(metathesis)reaction, the ammonium sulfate add-on is pressed the mol ratio 1.2: 1 of calcium ion in sulfate ion and the smart acid hydrolysis solution; Temperature of reaction is 60 ℃; Reaction times is 2 hours.Reaction solution is filtered, and solid is a high purity gypsum, is the high purity gypsum product after washing drying; Filtrate is the decalcification acid hydrolysis solution.
(4) the decalcification acid hydrolysis solution in the step (3) is allocated into sal enixum (add-on of sal enixum be decalcification acid hydrolysis solution weight 27%) back and gas ammonia neutralization reaction, composite fertilizer's slip of nitrogenous phosphorus potassium.The spray-dried powdery nitrate-based compound fertilizer that obtains of slip.
Result of implementation: 1, high purity gypsum: the sulfate dihydrate calcium contents is 99.5% in the gypsum after testing; 2, powdery nitrate-based compound fertilizer: total nitrogen content 21.5%, phosphorus (P
2O
5) content is 9.5%, potassium (K
2O) content is 9.0%.
Claims (10)
1. a method of producing the nitrate-based compound fertilizer by-product gypsum is characterized in that, may further comprise the steps:
(1) will carry out acidolysis reaction with nitric acid behind the phosphorus ore grinding;
(2) the thick acid hydrolysis solution that step (1) is obtained filters, and removes wherein acid non-soluble substance and organic seston, and filtrate is smart acid hydrolysis solution;
(3) smart acid hydrolysis solution adding ammonium sulfate or the sulfuric acid with step (2) carries out the replacement(metathesis)reaction decalcification, and reaction solution is filtered, and solid is a high purity gypsum, is gypsum product after washing drying, and filtrate is the decalcification acid hydrolysis solution;
(4) with the decalcification acid hydrolysis solution in the step (3) with become nitration mixture after sal enixum mixes, nitration mixture and gas ammonia neutralization reaction must contain the slip of ammonium nitrate, monoammonium phosphate, ammonium sulfate, vitriolate of tartar, slip obtains nitrate-based compound fertilizer through granulation, drying.
2. method according to claim 1 is characterized in that, the nitric acid mass concentration is 40-70% in the step (1), and the optimization mass concentration is 55-65%, more optimizes 60%.
3. method according to claim 1 is characterized in that, the mol ratio 1 of calcium ion and nitric acid in phosphorus ore when step (1) is carried out acidolysis reaction: 2-3 is optimized for 1: 2-2.3.
4. method according to claim 1 is characterized in that, temperature of reaction was 45-70 ℃ when step (1) was carried out acidolysis reaction, is optimized for 55-60 ℃, more optimizes 58 ℃.
5. method according to claim 1 is characterized in that, it is 0.5-4 hour that step (1) is carried out the acidolysis reaction the reaction time, and optimal conditions is 1-2 hour.
6. method according to claim 1 is characterized in that, ammonium sulfate or sulfuric acid add-on are pressed the mol ratio 1-1.2 of calcium ion in sulfate ion and the smart acid hydrolysis solution in the step (3): 1.
7. method according to claim 1 is characterized in that, temperature of reaction was 55-60 ℃ when step (3) was carried out metathesis.
8. method according to claim 1 is characterized in that, it is 1-4 hour that step (3) is carried out the metathesis the reaction time, is optimized for 2-2.5 hour.
9. method according to claim 1 is characterized in that, the granulation mode is spray granulating, ammoniation-granulation, high tower prilling or biaxial granulation in the step (4).
10. method according to claim 1 is characterized in that, the gained slip is produced powder-like product without granulation with the spraying drying mode in the step (4).
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104108968A (en) * | 2014-07-04 | 2014-10-22 | 贵州芭田生态工程有限公司 | Granulating method of nitric phosphate |
| CN106396915A (en) * | 2016-08-31 | 2017-02-15 | 宜昌富升化工有限公司 | Fully water-soluble nitro-sulfur based composite fertilizer and preparation method thereof |
| CN111533099A (en) * | 2020-05-22 | 2020-08-14 | 四川大学 | Production method of water-soluble monoammonium phosphate |
| CN111533154A (en) * | 2020-04-21 | 2020-08-14 | 贵州大学 | Method for removing calcium and byproduct alpha high-strength gypsum by decomposing phosphate rock acidolysis solution with nitric acid |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000143378A (en) * | 1998-11-05 | 2000-05-23 | Asahi Chem Ind Co Ltd | Porous compound fertilizer |
| CN1280111A (en) * | 1999-07-13 | 2001-01-17 | 李守义 | Middle concentrate compound potassium sulfate fertilizer and its producing method |
| CN101343200A (en) * | 2008-09-09 | 2009-01-14 | 中国-阿拉伯化肥有限公司 | Method for preparing sulphur based compound fertilizer by decomposing rock phosphate with hydrogen nitrate and system thereof |
-
2011
- 2011-01-20 CN CN2011100222234A patent/CN102126741B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000143378A (en) * | 1998-11-05 | 2000-05-23 | Asahi Chem Ind Co Ltd | Porous compound fertilizer |
| CN1280111A (en) * | 1999-07-13 | 2001-01-17 | 李守义 | Middle concentrate compound potassium sulfate fertilizer and its producing method |
| CN101343200A (en) * | 2008-09-09 | 2009-01-14 | 中国-阿拉伯化肥有限公司 | Method for preparing sulphur based compound fertilizer by decomposing rock phosphate with hydrogen nitrate and system thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104108968A (en) * | 2014-07-04 | 2014-10-22 | 贵州芭田生态工程有限公司 | Granulating method of nitric phosphate |
| CN106396915A (en) * | 2016-08-31 | 2017-02-15 | 宜昌富升化工有限公司 | Fully water-soluble nitro-sulfur based composite fertilizer and preparation method thereof |
| CN111533154A (en) * | 2020-04-21 | 2020-08-14 | 贵州大学 | Method for removing calcium and byproduct alpha high-strength gypsum by decomposing phosphate rock acidolysis solution with nitric acid |
| CN111533154B (en) * | 2020-04-21 | 2023-06-02 | 贵州大学 | Method for decomposing phosphate rock acidolysis solution by nitric acid to remove calcium and obtain byproduct alpha high-strength gypsum |
| CN111533099A (en) * | 2020-05-22 | 2020-08-14 | 四川大学 | Production method of water-soluble monoammonium phosphate |
| CN111533099B (en) * | 2020-05-22 | 2021-12-07 | 四川大学 | Production method of water-soluble monoammonium phosphate |
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| CN102126741B (en) | 2012-11-28 |
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Application publication date: 20110720 Assignee: Guizhou Kingenta Ecological Engineering Co., Ltd. Assignor: Shandong Kingenta Bio-engineering Stock Co., Ltd. Contract record no.: 2014370000033 Denomination of invention: Method for producing nitro/S-based compound fertilizer and coproducing plaster Granted publication date: 20121128 License type: Exclusive License Record date: 20140325 |
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Address after: 276700 Linyi Province, Linshu County, Xing County, West Street, No. 19 Patentee after: KINGENTA ECOLOGICAL ENGINEERING GROUP CO., LTD. Address before: 276700 No. 19, Da Xing Dong Street, Linshu County, Shandong Province Patentee before: Shandong Kingenta Bio-engineering Stock Co., Ltd. |