CN105776167A - Polyphosphate and preparation method thereof - Google Patents
Polyphosphate and preparation method thereof Download PDFInfo
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- CN105776167A CN105776167A CN201610195193.XA CN201610195193A CN105776167A CN 105776167 A CN105776167 A CN 105776167A CN 201610195193 A CN201610195193 A CN 201610195193A CN 105776167 A CN105776167 A CN 105776167A
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- polyphosphate
- fertilizer
- pelletize
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
- C01B25/38—Condensed phosphates
- C01B25/40—Polyphosphates
- C01B25/405—Polyphosphates of ammonium
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Pest Control & Pesticides (AREA)
- Inorganic Chemistry (AREA)
- Fertilizers (AREA)
Abstract
The invention discloses polyphosphate and a preparation method thereof. The preparation method comprises the following steps: (1) preparing slurry, namely, enabling nitric acid and phosphorite to react according to a mass ratio of (1.1-1.3):1 so as to obtain slurry; (2) neutralizing and steaming, namely, preheating the slurry to 90-130 DEG C, adding the slurry together with an ammonia gas into a tubular reactor in a mass ratio of (15-25):1, controlling the pressure to 0.35-0.45MPa, and enabling to react at 206-230 DEG C so as to obtain a material liquid; or preheating phosphoric acid and polyphosphoric acid to 90-130 DEG C, and adding into the tubular reactor to react with the ammonia gas so as to obtain the material liquid; (3) mixing, namely, mixing the material liquid with one or more of a nitrogen fertilizer, a phosphatic fertilizer, a potash fertilizer, additives and trace elements so as to obtain a mixture; and (4) pelletizing, namely, evaporating the material liquid obtained in the step (2) till the water content is smaller than 1.2%, directly pelletizing, or mixing with the mixture obtained in the step (3), and pelletizing, thereby obtaining the polyphosphate. The polyphosphate is simple in preparation method, low in cost, high in efficiency and good in diversity.
Description
Technical field
The invention belongs to technical field of fertilizers, be specifically related to a kind of polyphosphate and preparation method thereof.
Background technology
CN200780044974.8 discloses a kind of nitrophosphate process and produces the method containing polyphosphate NPK or NP material, the method is by reducing the pressure of evaporation step and/or improving the temperature of evaporation step and/or control the temperature of crystallisation step, make in the material obtained the mixture containing MAP, DAP, DCP and optional apatite, and the condensed phosphate of controlled quentity controlled variable (polyphosphate), and N/P and the Ca/P of NPK material is than for N/P >=0.95,1.0 >=Ca/P >=0.2, and the product obtained by the method.
The method preparing nitrophosphate fertilizer is also disclosed simultaneously, comprise the steps of (1) nitric acid digestion apatite, (2) crystallization, filtration of calcium nitrate, (3) neutralize with ammonia, (4) evaporation, wherein the pressure of evaporation process reduction evaporation makes moisture less than or equal to 1%, optionally improve the temperature of step (4) simultaneously, optionally controlling the temperature of crystallisation step (2) thus generating polyphosphate, optionally adding potassium afterwards in step (4).Prior art can only realize the chemical reaction of APP under negative pressure and generate, and condition restriction ratio is relatively strict, and power consumption height, is unfavorable for reaching the purpose of energy-saving and emission-reduction.
When prior art prepares polyphosphate, generally adopt after utilizing decomposing phosphorite by using nitric acid, by-10～0 DEG C of crystallization, and evaporating pressure is decreased below 0.8bar, evaporating temperature is risen above simultaneously and generate polyphosphate equal to 170 DEG C.This process has following deficiency: (1) by the impact of nitric acid severe corrosive, and the slurry moisture after decomposing phosphate rock high (up to 30～40%), during evaporation, steam consumption is big；(2) producing condensed type phosphate, the evaporation equipment volume of trough body structure used is big, needs the volume of several cubic metres, and making apparatus needs material many；(3) controlling under negative pressure and hot conditions, the material of equipment is required high (usually imported steel), equipment cost is high.
Summary of the invention
The present invention overcomes the defect of prior art to provide a kind of polyphosphate and preparation method thereof.
The purpose of the present invention is achieved through the following technical solutions:
A kind of polyphosphate, the average degree of polymerization of described polyphosphate is less than 10, and 2%～3% is long chain polyphosphate in described polyphosphate composition.
Preferably, the degree of polymerization of described long chain polyphosphate is more than 10.
The preparation method that the present invention also provides for described polyphosphate, comprises the steps:
(1) prepare slip: by nitric acid and phosphorus ore (1.1～1.3) in mass ratio: 1 reaction, obtain slip；
(2) neutralize and evaporation: with ammonia in mass ratio for (15～25) after slip is preheating to 90～130 DEG C: 1 addition controls pressure 0.35～0.45MPa to tubular reactor, is obtained by reacting feed liquid under 206～230 DEG C of conditions of temperature；
Or phosphoric acid, polyphosphoric acids are added to tubular reactor after being preheating to 90～130 DEG C and under control pressure 0.35～0.45MPa, 206～230 DEG C of conditions of temperature, are obtained by reacting feed liquid with ammonia, described phosphoric acid, polyphosphoric acids, ammonia mass ratio be (2-4): (2-4): 1；
(3) mixing: feed liquid is mixed to get mixture with one or more in nitrogenous fertilizer, phosphate fertilizer, potash fertilizer, adjuvant and trace element；
(4) pelletize: after being mixed by the mixture in step (3), pelletize obtains polyphosphate.
The preparation method that present invention also offers a kind of polyphosphate, comprises the steps:
(1) prepare slip: by nitric acid and phosphorus ore (1.1～1.3) in mass ratio: 1 reaction, obtain slip；
(2) neutralize and evaporation: with ammonia in mass ratio for (15～25) after slip is preheating to 90～130 DEG C: 1 addition controls pressure 0.35～0.45MPa to tubular reactor, is obtained by reacting feed liquid under 206～230 DEG C of conditions of temperature；
(3) mixing: feed liquid is mixed to get mixture with one or more in nitrogenous fertilizer, phosphate fertilizer, potash fertilizer, adjuvant and trace element；
(4) pelletize: the feed liquid of step (2) is evaporated to water content less than 1.2% after directly pelletize or the mixture in step (3) carried out pelletize obtain polyphosphate.
The preparation method that present invention also offers a kind of polyphosphate, comprises the steps:
(1) phosphoric acid, polyphosphoric acids are added to tubular reactor after being preheating to 90～130 DEG C control pressure under 0.35～0.45MPa, 206～230 DEG C of conditions of temperature, are obtained by reacting feed liquid with ammonia, described phosphoric acid, polyphosphoric acids, ammonia mass ratio be (2-4): (2-4): 1；
(2) mixing: feed liquid is mixed to get mixture with one or more in nitrogenous fertilizer, phosphate fertilizer, potash fertilizer, adjuvant and trace element；
(3) pelletize: the feed liquid of step (1) is evaporated to water content less than 1.2% after directly pelletize or the mixture of step (2) is carried out pelletize obtain polyphosphate.
Preferably, in step (1) after decomposing phosphorite by using nitric acid, elimination acid non-soluble substance obtains slip.
Preferably, neutralize described in step (2) as occurring under positive pressure to neutralize reaction.
Preferably, feed liquid in step (3): nitrogenous fertilizer: phosphate fertilizer: potash fertilizer: adjuvant: the mass ratio of trace element is (50～70): (0～30): (0～30): (0～30): (0～20): (0～1).
Preferably, in step (3), adjuvant is one or more in nitre phosphorus compound fertilizer, nitrophosphate fertilizer, ammonium sulfate, MAP, Diammonium phosphate (DAP), magnesium potassium sulfate, potassium sulfate, potassium chloride, stone powder, dry powder, zinc sulfate, manganese sulfate, magnesium sulfate.
Preferably, high tower or biaxial granulation machine pelletize are passed through in step (4) described pelletize, after pelletize, after processing, namely granule cooling, screening, parcel are obtained polyphosphate.
Compared with prior art, there is advantages that
(1) neutralize, flow process is simple, cost is low in evaporation: the present invention neutralizes, evaporation all carries out in tubular reactor, compared with prior art, saves neutralization, evaporation equipment；Also save the steam consumption of evaporation simultaneously, reduce production cost.During with slot type neutralization, evaporation equipment, volume is big, each neutralization chamber diameter about 3.5 meters, and high about 4.6 meters, large-scale production needs 2～10 grooves, and this each trough will use steam, consumes big；Slip then only need to be preheated by tubular reactor, and recycling reaction heat evaporates moisture unnecessary in slip.Reaction heat can be made full use of to reduce the moisture of feed liquid after neutralization simultaneously, save steam；Tubular reactor can adopt filler carbon steel material, and reactor volume little (less than 1 cube of master), cost of manufacture is low.
(2) generate polyphosphate method variation: have two kinds of approach, one be by decomposing phosphorite by using nitric acid after part or all of slip, in tubular reactor with ammonia malleation in and and generate polyphosphate；One be by phosphoric acid or polyphosphoric acids in tubular reactor with ammonia malleation in and and generate polyphosphate；
(3) efficiency is high: the polyphosphate content in the product prepared by this programme accounts for more than the 5% of total phosphate content.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearly understand, below in conjunction with embodiment, the present invention is further elaborated, but the scope of protection of present invention is not limited to the scope that embodiment is expressed.
Embodiment 1
Prepare polyphosphate to comprise the steps:
(1) slip is prepared: being reacted with phosphorus ore 1.2:1 in mass ratio by nitric acid, elimination acid non-soluble substance obtains slip；
(2) malleation and evaporation: occur under positive pressure to neutralize reaction, adds with ammonia 20:1 in mass ratio after slip is preheating to 100 DEG C and controls to be obtained by reacting feed liquid under pressure 0.35MPa, 210 DEG C of conditions of temperature to tubular reactor；
Or add with ammonia 3:3:1 in mass ratio after phosphoric acid, polyphosphoric acids are preheating to 100 DEG C and control to be obtained by reacting feed liquid under pressure 0.35MPa, 210 DEG C of conditions of temperature to tubular reactor；
(3) mixing: feed liquid is mixed with one or more in nitre phosphorus compound fertilizer, nitrophosphate fertilizer, ammonium sulfate, MAP, Diammonium phosphate (DAP), magnesium potassium sulfate, potassium sulfate, potassium chloride, stone powder, dry powder, zinc sulfate, manganese sulfate, magnesium sulfate etc.；
(4) pelletize: by biaxial granulation machine pelletize after being mixed by the mixture in step (3), namely obtains polyphosphate after being processed by granule cooling screening parcel after pelletize.
Embodiment 2
The preparation method of a kind of polyphosphate, comprises the steps:
(1) slip is prepared: 16.9kg mass fraction being about the nitric acid of 65% and reacts with 10kg phosphorus ore, elimination acid non-soluble substance obtains slip；
(2) neutralize and evaporation: add to tubular reactor with 1.4kg ammonia after slip is preheating to 90 DEG C and control pressure 0.35MPa, under 206 DEG C of conditions of temperature, being obtained by reacting feed liquid；
(3) mixing: feed liquid and 12.6kg nitrogenous fertilizer, 12.6kg phosphate fertilizer, 12.6kg potash fertilizer, 8.4kg adjuvant (nitre phosphorus compound fertilizer, nitrophosphate fertilizer, ammonium sulfate, MAP, Diammonium phosphate (DAP), magnesium potassium sulfate, potassium sulfate, potassium chloride, stone powder, dry powder, zinc sulfate, manganese sulfate, magnesium sulfate) and 4.2kg magnesium, zinc, boron, molybdenum, calcium (trace element) are mixed and obtains mixture；
(4) pelletize: the feed liquid of step (2) is evaporated to water content less than 1.2% after obtain polyphosphate either directly through high-tower granulation.
Comparative example 1
As different from Example 2, comparative example 1 step (2) neutralizes and adds to tubular reactor with 1.4kg ammonia after slip being preheating to 90 DEG C with evaporation step and control pressure-0.35MPa, is obtained by reacting feed liquid under 206 DEG C of conditions of temperature.
Comparative example 2
As different from Example 2, comparative example 1 step (2) neutralizes and adds to tubular reactor with 1.4kg ammonia after slip being preheating to 90 DEG C with evaporation step and control pressure-0.35MPa, is obtained by reacting feed liquid under 140 DEG C of conditions of temperature.
Comparative example 3
As different from Example 2, comparative example 1 step (2) neutralizes and slip is not preheated directly by evaporation step and 1.4kg ammonia adds to tubular reactor and controls pressure-0.35MPa, is obtained by reacting feed liquid under 140 DEG C of conditions of temperature.
Embodiment 3
The preparation method of a kind of polyphosphate, comprises the steps:
(1) it is about 30.7kg mass fraction after the nitric acid of 65% is preheating to 90 DEG C with 20kg polyphosphoric acids to add to tubular reactor control pressure and is obtained by reacting feed liquid with 10kg ammonia under 0.35Mpa, 206 DEG C of conditions of temperature.
(2) mixing: feed liquid and 12.6kg nitrogenous fertilizer, 12.6kg phosphate fertilizer, 12.6kg potash fertilizer, 8.4kg adjuvant (nitre phosphorus compound fertilizer, nitrophosphate fertilizer, ammonium sulfate, MAP, Diammonium phosphate (DAP), magnesium potassium sulfate, potassium sulfate, potassium chloride, stone powder, dry powder, zinc sulfate, manganese sulfate, magnesium sulfate) and 4.2kg magnesium, zinc, boron, molybdenum, calcium (trace element) are mixed to get mixture；
(3) pelletize: obtain polyphosphate by high-tower granulation after being mixed by the mixture in step (2).
The composition of polyphosphate prepared by the employing paper chromatography each embodiment of analysis and comparative example, result is following table such as.
Comparative example 1 adds in tubular reactor and control pressure-0.35MPa, being obtained by reacting feed liquid under 206 DEG C of conditions of temperature with 1.4kg ammonia after slip being preheating to 90 DEG C owing to step (2) neutralizes with evaporation step relative to embodiment 2.Therefore the average degree of polymerization of polyphosphate, the degree of polymerization long chain polyphosphate more than 10 that generate in system are low both with respect to embodiment 2.Relative to comparative example 1, embodiment 2 shows that step (2) neutralizes the pressure with evaporation reaction and can determine the aggregate rate of the average degree of polymerization of polyphosphate, the degree of polymerization long chain polyphosphate more than 10.
Comparative example 2 adds in tubular reactor and control pressure-0.35MPa, being obtained by reacting feed liquid under 140 DEG C of conditions of temperature with 1.4kg ammonia after slip being preheating to 90 DEG C owing to its comparative example 1 step (2) neutralizes with evaporation step relative to embodiment 2.Therefore the average degree of polymerization of polyphosphate, the degree of polymerization long chain polyphosphate more than 10 that generate in system are also low both with respect to embodiment 2.Relative to comparative example 1, embodiment 2 shows that step (2) neutralizes the pressure and temperature with evaporation reaction and can determine the aggregate rate of the average degree of polymerization of polyphosphate, the degree of polymerization long chain polyphosphate more than 10 simultaneously.
Comparative example 3 relative to embodiment 2 due to its step (2) neutralize with evaporation step slip do not preheated directly with 1.4kg ammonia addition to tubular reactor in and control pressure-0.35MPa, being obtained by reacting feed liquid under 140 DEG C of conditions of temperature, the average degree of polymerization of polyphosphate, the degree of polymerization long chain polyphosphate more than 10 that generate in system are also low both with respect to embodiment 2.Embodiment 2 shows the preheating temperature of step (2) slip relative to comparative example 1, neutralizes and evaporates the pressure and temperature reacted in OK range, it was shown that above-mentioned three can determine the aggregate rate of the average degree of polymerization of polyphosphate, the degree of polymerization long chain polyphosphate more than 10.
The announcement of book and instruction according to the above description, above-mentioned embodiment can also be modified and revise by those skilled in the art in the invention.Therefore, the invention is not limited in detailed description of the invention disclosed and described above, should also be as some modifications and changes of the present invention falling in the scope of the claims of the present invention.Although additionally, employ some specific terms in this specification, but these terms are intended merely to convenient explanation, and the present invention does not constitute any restriction.
Claims (10)
1. a polyphosphate, it is characterised in that the average degree of polymerization of described polyphosphate is less than 10, and 2%～3% is long chain polyphosphate in described polyphosphate composition.
2. a kind of polyphosphate as claimed in claim 1, it is characterised in that the degree of polymerization of described long chain polyphosphate is more than 10.
3. the preparation method of a kind of polyphosphate as claimed in claim 1, it is characterised in that comprise the steps:
(1) prepare slip: by nitric acid and phosphorus ore (1.1～1.3) in mass ratio: 1 reaction, obtain slip；
(2) neutralize and evaporation: with ammonia in mass ratio for (15～25) after slip is preheating to 90～130 DEG C: 1 addition controls pressure 0.35～0.45MPa to tubular reactor, is obtained by reacting feed liquid under 206～230 DEG C of conditions of temperature；
Or phosphoric acid, polyphosphoric acids are added to tubular reactor after being preheating to 90～130 DEG C and under control pressure 0.35～0.45MPa, 206～230 DEG C of conditions of temperature, are obtained by reacting feed liquid with ammonia, described phosphoric acid, polyphosphoric acids, ammonia mass ratio be (2-4): (2-4): 1；
(3) mixing: feed liquid is mixed to get mixture with one or more in nitrogenous fertilizer, phosphate fertilizer, potash fertilizer, adjuvant and trace element；
(4) pelletize: after being mixed by the mixture in step (3), pelletize obtains polyphosphate.
4. the preparation method of a polyphosphate, it is characterised in that comprise the steps:
(1) prepare slip: by nitric acid and phosphorus ore (1.1～1.3) in mass ratio: 1 reaction, obtain slip；
(2) neutralize and evaporation: with ammonia in mass ratio for (15～25) after slip is preheating to 90～130 DEG C: 1 addition controls pressure 0.35～0.45MPa to tubular reactor, is obtained by reacting feed liquid under 206～230 DEG C of conditions of temperature；
(3) mixing: feed liquid is mixed to get mixture with one or more in nitrogenous fertilizer, phosphate fertilizer, potash fertilizer, adjuvant and trace element；
(4) pelletize: the feed liquid of step (2) is evaporated to water content less than 1.2% after directly pelletize or the mixture in step (3) carried out pelletize obtain polyphosphate.
5. the preparation method of a polyphosphate, it is characterised in that comprise the steps:
(1) phosphoric acid, polyphosphoric acids are added to tubular reactor after being preheating to 90～130 DEG C control pressure under 0.35～0.45MPa, 206～230 DEG C of conditions of temperature, are obtained by reacting feed liquid with ammonia, described phosphoric acid, polyphosphoric acids, ammonia mass ratio be (2-4): (2-4): 1；
(2) mixing: feed liquid is mixed to get mixture with one or more in nitrogenous fertilizer, phosphate fertilizer, potash fertilizer, adjuvant and trace element；
(3) pelletize: the feed liquid of step (1) is evaporated to water content less than 1.2% after directly pelletize or the mixture of step (2) is carried out pelletize obtain polyphosphate.
6. the preparation method of a kind of polyphosphate according to any one of claim 3-5, it is characterised in that in step (1) after decomposing phosphorite by using nitric acid, elimination acid non-soluble substance obtains slip.
7. the preparation method of a kind of polyphosphate according to any one of claim 3-5, it is characterised in that neutralize described in step (2) as occurring under positive pressure to neutralize reaction.
8. the preparation method of a kind of polyphosphate according to any one of claim 3-5, it is characterized in that, feed liquid in step (3): nitrogenous fertilizer: phosphate fertilizer: potash fertilizer: adjuvant: the mass ratio of trace element is (50～70): (0～30): (0～30): (0～30): (0～20): (0～1).
9. the preparation method of a kind of polyphosphate according to any one of claim 3-5, it is characterized in that, in step (3), adjuvant is one or more in nitre phosphorus compound fertilizer, nitrophosphate fertilizer, ammonium sulfate, MAP, Diammonium phosphate (DAP), magnesium potassium sulfate, potassium sulfate, potassium chloride, stone powder, dry powder, zinc sulfate, manganese sulfate, magnesium sulfate.
10. the preparation method of a kind of polyphosphate according to any one of claim 3-5, it is characterised in that high tower or biaxial granulation machine pelletize are passed through in step (4) described pelletize, namely obtains polyphosphate by granule cooling, screening, parcel after processing after pelletize.
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| CN201510155315 | 2015-04-02 | ||
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107162843A (en) * | 2017-04-25 | 2017-09-15 | 长江师范学院 | The method that hot pickled mustard tube special fertilizer is produced with phosphate ore flotation tailings |
| CN107954749A (en) * | 2016-10-18 | 2018-04-24 | 贵州芭田生态工程有限公司 | Compound nitrogen phosphate fertilizer containing Quadrafos and preparation method thereof |
| CN108727133A (en) * | 2018-06-13 | 2018-11-02 | 贵阳开磷化肥有限公司 | A kind of preparation method of salt-soda soil special complex fertilizer |
| CN112939682A (en) * | 2021-02-22 | 2021-06-11 | 深圳市芭田生态工程股份有限公司 | Preparation method of polyphosphate synergistic nitrophosphate fertilizer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5795815A (en) * | 1980-10-15 | 1982-06-14 | Hoechst Ag | Manufacture of long chain ammonium polyphosphate |
| CN1651488A (en) * | 2004-12-23 | 2005-08-10 | 云南省化工研究院 | Production method of poly ammonium phosphate |
| EP2112123A3 (en) * | 2008-04-25 | 2010-01-06 | BK Giulini GmbH | Method for manufacturing flame retardants and their application in textiles |
| CN102718588A (en) * | 2012-05-31 | 2012-10-10 | 深圳市芭田生态工程股份有限公司 | Compound fertilizer produced by tubular reaction and method for preparing compound fertilizer |
-
2016
- 2016-03-31 CN CN201610195193.XA patent/CN105776167A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5795815A (en) * | 1980-10-15 | 1982-06-14 | Hoechst Ag | Manufacture of long chain ammonium polyphosphate |
| CN1651488A (en) * | 2004-12-23 | 2005-08-10 | 云南省化工研究院 | Production method of poly ammonium phosphate |
| EP2112123A3 (en) * | 2008-04-25 | 2010-01-06 | BK Giulini GmbH | Method for manufacturing flame retardants and their application in textiles |
| CN102718588A (en) * | 2012-05-31 | 2012-10-10 | 深圳市芭田生态工程股份有限公司 | Compound fertilizer produced by tubular reaction and method for preparing compound fertilizer |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107954749A (en) * | 2016-10-18 | 2018-04-24 | 贵州芭田生态工程有限公司 | Compound nitrogen phosphate fertilizer containing Quadrafos and preparation method thereof |
| CN107954749B (en) * | 2016-10-18 | 2021-03-30 | 贵州芭田生态工程有限公司 | Polyphosphate-containing nitrogen-phosphorus compound fertilizer and preparation method thereof |
| CN107162843A (en) * | 2017-04-25 | 2017-09-15 | 长江师范学院 | The method that hot pickled mustard tube special fertilizer is produced with phosphate ore flotation tailings |
| CN108727133A (en) * | 2018-06-13 | 2018-11-02 | 贵阳开磷化肥有限公司 | A kind of preparation method of salt-soda soil special complex fertilizer |
| CN112939682A (en) * | 2021-02-22 | 2021-06-11 | 深圳市芭田生态工程股份有限公司 | Preparation method of polyphosphate synergistic nitrophosphate fertilizer |
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Application publication date: 20160720 |