CN105481515A - Production method of compound fertilizer containing poly-magnesium phosphate - Google Patents
Production method of compound fertilizer containing poly-magnesium phosphate Download PDFInfo
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- CN105481515A CN105481515A CN201511027137.7A CN201511027137A CN105481515A CN 105481515 A CN105481515 A CN 105481515A CN 201511027137 A CN201511027137 A CN 201511027137A CN 105481515 A CN105481515 A CN 105481515A
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- Prior art keywords
- acid
- compound fertilizer
- magnesium
- production method
- phosphoric acid
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- 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
-
- 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
Abstract
The invention discloses a production method of compound fertilizer containing poly-magnesium phosphate. The method includes the following steps that firstly, wet-process phosphoric acid and magnesium oxide powder are added into a reactor in proportion, and a dilute magnesium biphosphate solution is obtained; secondly, one or more of urea, ammonium nitrate, calcium ammonium nitrate and nitric phosphate are added into the dilute magnesium biphosphate solution and placed in an evaporator to be heated and evaporated, and a sizing agent is obtained; thirdly, the sizing agent is produced to form the compound fertilizer containing poly-magnesium phosphate. According to the production method of the compound fertilizer containing poly-magnesium phosphate, conventional wet-process phosphoric acid serves as main raw materials, the magnesium oxide powder is applied to perform reaction and processing, the compound fertilizer containing poly-magnesium phosphate is produced, and production cost is low. Not only is magnesium fertilizer added, but also 10% or above ortho-dihydrogen phosphate radicals are converted into poly-phosphate radicals, and product quality is high.
Description
Technical field
The present invention relates to the production field of compound fertilizer, particularly a kind of production method containing polyphosphoric acid magnesium compound fertilizer.
Background technology
Magnesium is the required moderate-element of plant, and be chlorophyllous important composition, it is absolutely necessary for photosynthesis.Magnesium elements is the activator of many enzymes, can promote the metabolism of carbohydrate, the synthesis of nucleic acid, phosphatic conversion etc., contribute to plant growth and high yield.Compound fertilizer is produced in material and is added fertiliser containing magnesium, and the problem of mainly encountering is, conventional magnesium sulfate often containing crystal water, compound fertilizer produce in drying not, cause the easy efflorescence of particle to be hardened.Therefore, present stage major part fertiliser containing magnesium use all separately.Increase technical communicator difficulty and agriculture production workload.Conventional phosphate fertilizer is ortho-phosphoric acid root salt mostly, be administered in soil and just fixed by iron, calcium plasma in 4 ~ 12 hours, movability is little, experimentally, major part soil miles of relative movement is no more than 10 centimetres, plant not easily absorbs, although people adopt concentrated fertilization mode to reduce by soil fixing as far as possible, produces effects little.Cause phosphorus utilization general too low, this season utilization ratio only about 10 ~ 15%.
Modern age introduces the ammonium polyphosphate containing poly-phosphate in the production of compound fertilizer and liquid fertilizer, causes the attention of people gradually.Major advantage containing poly-phosphate fertilizer is: 1, poly-phosphate has sequestering power to metal ion, therefore, is not easily fixed by metal ions such as the iron in soil, calcium, can increase locomotivity; And can soluble complexes be formed with the invalid trace element in soil and be absorbed by plants on the contrary; 2, the sequestering action of poly-phosphate can prevent the metallic impurity in suspension fertilizer from forming precipitation, thus adds ammonium polyphosphate and can obtain high-concentration suspension fertilizer; 3, poly-phosphate is not directly absorbed by plant, but in soil, is progressively hydrolyzed into ortho-phosphoric acid by plant utilization, because of but a kind of slow dissolubility controlled availability fertilizer.Use poly-phosphate fertilizer, short chain moieties is hydrolyzed to ortho-phosphoric acid root Crop for 2 ~ 7 days, and the long-chain moiety polymerization degree is longer, and hydrolysis time is longer, and the poly-phosphorus ammonium of fertilizer generally selects the controlled hydrolysis polymerization degree of 7 ~ 60 days.The controlled polymerization degree has good controlled release properties.Adopt poly-phosphorus technology, P availability is enhanced about more than once, and use proper, phosphorus utilization reaches 70-80%.
Previous production polyphosphoric acid base is ammonium polyphosphate produced in USA, mainly with hot method polyphosphoric acid for raw material, but it is too high to make the obvious cost of fertilizer with it.Early 1970s U.S. TVA develops with commodity phosphoric acid by wet process (54%P
2o
5) ammonification in tubular reactor, produce the molten mass containing ammonium polyphosphate, mainly for the production of liquid fertilizer.Before u. s. mesh, liquid fertilizer occupies about 40% of total fertilizer amount, the phosphorus source mainly ammonium polyphosphate of its liquid fertilizer.Producing containing poly-phosphate kind at present in China is ammonium polyphosphate, and its production technique mainly contains urea phosphate condensation method, ammonium phosphate salt urea condensation method and ammonium phosphate Vanadium Pentoxide in FLAKES polymerization 3 kinds.Mainly for the production of frie retardant coating.This several prods is improper as fertilizer material.The condensation method having urea to participate in, because needing comparatively high temps when producing, produces the biuret, triuret etc. harmful to crop, and ammonia loss is serious.Therefore domestic do not have large-scale production process technology.Therefore, poly-phosphate does not have economically viable production technology in agriculture compound fertilizer.
The information being disclosed in this background technology part is only intended to increase the understanding to general background of the present invention, and should not be regarded as admitting or imply in any form that this information structure has been prior art that persons skilled in the art are known.
Summary of the invention
The object of the present invention is to provide a kind of production method containing polyphosphoric acid magnesium compound fertilizer, thus it is high to overcome existing production method production cost, energy consumption is large, the shortcoming of obtained compound fertilizer fertilizer efficiency difference.
For achieving the above object, the invention provides a kind of production method containing polyphosphoric acid magnesium compound fertilizer, comprise the following steps:
(1) adopt phosphoric acid by wet process and magnesia powder to join in reactor in proportion to react, obtain dilute phosphoric acid dihydro magnesium solution;
(2) in dilute phosphoric acid dihydro magnesium solution, add one or more in urea, ammonium nitrate, calcium ammonium nitrate, nitrophosphate fertilizer, and insert heating evaporation in vaporizer, obtain slurry;
(3) slurry is carried out production to be formed containing polyphosphoric acid magnesium compound fertilizer.
Preferably, in technique scheme, the heating evaporation of described step (2) comprising:
A. dilute phosphoric acid dihydro magnesium is inserted in vaporizer and heat, carry out first time evaporation, form the concentrated phosphoric acid dihydro magnesium solution that water content is 7 ~ 35%;
B. in concentrated phosphoric acid dihydro magnesium solution, add one or more in urea, ammonium nitrate, calcium ammonium nitrate, nitrophosphate fertilizer, insert in vaporizer and heat, carry out second time evaporation, form the slurry of water content < 2%.
Preferably, in technique scheme, the heating evaporation of described step (2) is included in dilute phosphoric acid dihydro magnesium one or more that add in urea, ammonium nitrate, calcium ammonium nitrate, nitrophosphate fertilizer, insert heating evaporation in vaporizer, form the slurry of water content < 2%.
Preferably, in technique scheme, described step (1) described phosphoric acid by wet process and magnesium oxide are counted add-on by weight and are, the phosphoric acid by wet process of phosphoric acid 25% 50 ~ 100 parts, containing the magnesia powder 1 ~ 10 part of magnesium oxide 90%.
Preferably, in technique scheme, described step (1) described phosphoric acid by wet process and magnesium oxide refer to that mol ratio is 0.9 ~ 2.2:1 in proportion.
Preferably, in technique scheme, in described step (2), in vaporizer, Heating temperature is 110 ~ 200 DEG C, vacuum tightness 0 ~ 0.08Mpa.
Preferably, in technique scheme, add one or more in potash fertilizer, middle micro element fertilizer, additive in the slurry of described step (3), and then granulation produces formation containing polyphosphoric acid magnesium compound fertilizer.
Preferably, in technique scheme, described additive is one or more that described additive-package contains in plant hormone, plant modifying agent, agricultural chemicals, fertilizer function regulator, kaolin, wilkinite, ground dolomite.
Preferably, in technique scheme, described plant hormone is one or more in growth hormone, choline dichloride, dormin; Described plant modifying agent is one or more in DA-6, sodium nitrophenolate; Described agricultural chemicals is one or more in acephatemet, Paraquat.
Preferably, in technique scheme, described fertilizer function regulator is Amino Trimethylene Phosphonic Acid salt, ethylene diamine tetra methylene phosphonic acid salt, 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid salt, diethylene triamine pentamethylene phosphonic salt, polyacrylate, the large acetate of quadrol two salicyl, tri-polyphosphate, Citrate trianion, gluconate, tartrate, diethylamide tetraacetate, polyaspartic acid salts, maleic acid-acrylic acid copolymer, diethylene triamine pentacetic acid (DTPA) salt, phosphoric acid, sulfuric acid, nitric acid, hydrochloric acid, ureasulfuric acid, gluconic acid, citric acid, lactic acid, oxysuccinic acid, tartrate, amino acid, methyl alcohol, ethanol, ethylene glycol, glycerol, formaldehyde, one or more in acetaldehyde.
Preferably, in technique scheme, in described step (1), obtained dilute phosphoric acid dihydro magnesium solution carried out filtering to remove water-insoluble.
Compared with prior art, the present invention has following beneficial effect: the present invention is containing the production method of polyphosphoric acid magnesium compound fertilizer, by applying conventional filtered, without concentrated phosphoric acid by wet process as main raw material, application magnesia powder carries out reacting processing and produces containing polyphosphoric acid magnesium compound fertilizer, and production cost is low.Not only with the addition of fertiliser containing magnesium, and more than 10% ortho-phosphoric acid dihydro root is converted into polyphosphoric acid root, product quality is high.Containing polyphosphoric acid magnesium compound fertilizer
Embodiment
Below in conjunction with specific embodiment, the specific embodiment of the present invention is described in detail, but is to be understood that protection scope of the present invention not by the restriction of embodiment.
Embodiment 1
Containing a production method for polyphosphoric acid magnesium compound fertilizer, comprise the following steps:
Step one, adopt without phosphoric acid 25% phosphoric acid by wet process 100 parts that is concentrated and that filter, add the magnesia powder 5.5 parts containing magnesium oxide 90%, join in reactor respectively and react, the dilute phosphoric acid dihydro magnesium solution containing water-insoluble obtained, solution after filtration, forms pure dilute phosphoric acid dihydro magnesium solution;
Step 2, pure dilute phosphoric acid dihydro magnesium solution enter heating in the first vaporizer and carry out single vaporization, form the concentrated phosphoric acid dihydro magnesium solution of moisture 35%;
Step 3, concentrated phosphoric acid dihydro magnesium solution add the calcium ammonium nitrate 50 parts of nitrogenous 27% again, enter in the second vaporizer and heat 200 DEG C, vacuum tightness 0Mpa, carry out double evaporation-cooling, the slip of moisture 1.5% is formed after double evaporation-cooling, in slip, dihydrogen phosphate has been partially converted into polyphosphoric acid root, is equivalent to generate containing polyphosphoric acid magnesium slip;
Step 4, slip carry out granulation and produce formation compound fertilizer,
By above step, formation content is the compound fertilizer of 16.8-18.1-0-6.2 (magnesium oxide), can record the polymerization degree 3.6 of wherein phosphorus content 2.2, and this compound fertilizer is containing polyphosphoric acid magnesium compound fertilizer.Embodiment 2
Containing a production method for polyphosphoric acid magnesium compound fertilizer, comprise the following steps:
Step one, adopt without concentrated, phosphoric acid 25% phosphoric acid by wet process 80 parts filtered, add the magnesia powder 4.5 parts containing magnesium oxide 90%, join in reactor respectively and react, the dilute phosphoric acid dihydro magnesium solution containing a small amount of water-insoluble obtained, solution more after filtration, forms pure dilute phosphoric acid dihydro magnesium solution;
Step 2, pure dilute phosphoric acid dihydro magnesium add 30 parts, the urea of nitrogenous 46% again, enter in vaporizer and heat 110 DEG C, vacuum tightness 0.08Mpa, evaporate, the slip of moisture 0.8% is formed after evaporation, in slip, dihydrogen phosphate has been partially converted into polyphosphoric acid root, is equivalent to generate containing polyphosphoric acid magnesium slip;
Step 3, slip add the potassium sulfate 20 parts of content 50% again, and granulation is produced and formed compound fertilizer.
By above step, formation content is the compound fertilizer of 18.5-19.4-13.4-5.4 (magnesium oxide), can record the polymerization degree 2.6 of wherein phosphorus content 2.1, and this compound fertilizer is containing polyphosphoric acid magnesium compound fertilizer.
The aforementioned description to concrete exemplary of the present invention is to illustrate and the object of illustration.These descriptions not want the present invention to be defined as disclosed precise forms, and obviously, according to above-mentioned instruction, can much change and change.The object selected exemplary embodiment and describe is to explain certain principles of the present invention and practical application thereof, thus those skilled in the art can be realized and utilize various different exemplary of the present invention and various different selection and change.Scope of the present invention is intended to limited by claims and equivalents thereof.
Claims (10)
1., containing a production method for polyphosphoric acid magnesium compound fertilizer, it is characterized in that, comprise the following steps:
(1) adopt phosphoric acid by wet process and magnesia powder to join in reactor in proportion to react, obtain dilute phosphoric acid dihydro magnesium solution;
(2) in dilute phosphoric acid dihydro magnesium solution, add one or more in urea, ammonium nitrate, calcium ammonium nitrate, nitrophosphate fertilizer, and insert heating evaporation in vaporizer, obtain slurry;
(3) slurry is carried out production to be formed containing polyphosphoric acid magnesium compound fertilizer.
2. the production method containing polyphosphoric acid magnesium compound fertilizer according to claim 1, it is characterized in that, the heating evaporation of described step (2) comprising:
A. dilute phosphoric acid dihydro magnesium is inserted in vaporizer and heat, carry out first time evaporation, form the concentrated phosphoric acid dihydro magnesium solution that water content is 7 ~ 35%;
B. in concentrated phosphoric acid dihydro magnesium solution, add one or more in urea, ammonium nitrate, calcium ammonium nitrate, nitrophosphate fertilizer, insert in vaporizer and heat, carry out second time evaporation, form the slurry of water content < 2%.
3. the production method containing polyphosphoric acid magnesium compound fertilizer according to claim 1, it is characterized in that, the heating evaporation of described step (2) is included in dilute phosphoric acid dihydro magnesium one or more that add in urea, ammonium nitrate, calcium ammonium nitrate, nitrophosphate fertilizer, insert heating evaporation in vaporizer, form the slurry of water content < 2%.
4. the production method containing polyphosphoric acid magnesium compound fertilizer according to claim 1, it is characterized in that, described step (1) described phosphoric acid by wet process and magnesium oxide refer to that mol ratio is 0.9 ~ 2.2:1 in proportion.
5. the production method containing polyphosphoric acid magnesium compound fertilizer according to claim 1, is characterized in that, in described step (2), in vaporizer, Heating temperature is 30 ~ 200 DEG C, vacuum tightness 0 ~ 0.08Mpa.
6. the production method containing polyphosphoric acid magnesium compound fertilizer according to claim 1, it is characterized in that, add one or more in potash fertilizer, middle micro element fertilizer, additive in the slurry of described step (3), and then granulation produces formation containing polyphosphoric acid magnesium compound fertilizer.
7. the production method containing polyphosphoric acid magnesium compound fertilizer according to claim 6, it is characterized in that, described additive is one or more that described additive-package contains in plant hormone, plant modifying agent, agricultural chemicals, fertilizer function regulator, kaolin, wilkinite, ground dolomite.
8. the production method containing polyphosphoric acid magnesium compound fertilizer according to claim 7, it is characterized in that, described plant hormone is one or more in growth hormone, choline dichloride, dormin; Described plant modifying agent is one or more in DA-6, sodium nitrophenolate; Described agricultural chemicals is one or more in acephatemet, Paraquat.
9. the production method containing polyphosphoric acid magnesium compound fertilizer according to claim 8, it is characterized in that, described fertilizer function regulator is Amino Trimethylene Phosphonic Acid salt, ethylene diamine tetra methylene phosphonic acid salt, 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid salt, diethylene triamine pentamethylene phosphonic salt, polyacrylate, the large acetate of quadrol two salicyl, tri-polyphosphate, Citrate trianion, gluconate, tartrate, diethylamide tetraacetate, polyaspartic acid salts, maleic acid-acrylic acid copolymer, diethylene triamine pentacetic acid (DTPA) salt, phosphoric acid, sulfuric acid, nitric acid, hydrochloric acid, ureasulfuric acid, gluconic acid, citric acid, lactic acid, oxysuccinic acid, tartrate, amino acid, methyl alcohol, ethanol, ethylene glycol, glycerol, formaldehyde, one or more in acetaldehyde.
10. the production method containing polyphosphoric acid magnesium compound fertilizer according to claim 1, is characterized in that, in described step (1), obtained dilute phosphoric acid dihydro magnesium solution carried out filtering to remove water-insoluble.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201511027137.7A CN105481515A (en) | 2015-12-31 | 2015-12-31 | Production method of compound fertilizer containing poly-magnesium phosphate |
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| CN201511027137.7A CN105481515A (en) | 2015-12-31 | 2015-12-31 | Production method of compound fertilizer containing poly-magnesium phosphate |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108456007A (en) * | 2018-04-02 | 2018-08-28 | 金正大生态工程集团股份有限公司 | A kind of calcium polyphosphate magnesium fertilizer and preparation method thereof prepared as raw material using phosphoric acid and phosphorus tailing |
| CN108456122A (en) * | 2018-04-02 | 2018-08-28 | 金正大生态工程集团股份有限公司 | One cultivates peanut Special slow release fertilizer and its manufacturing method |
| CN114133282A (en) * | 2021-11-23 | 2022-03-04 | 谭宏伟 | Preparation method of efficient magnesium polyphosphate fertilizer |
| CN114249610A (en) * | 2021-12-30 | 2022-03-29 | 瓮福达州化工有限责任公司 | Preparation process and device of ammonium potassium polyphosphate containing chelated medium and trace elements |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108456007A (en) * | 2018-04-02 | 2018-08-28 | 金正大生态工程集团股份有限公司 | A kind of calcium polyphosphate magnesium fertilizer and preparation method thereof prepared as raw material using phosphoric acid and phosphorus tailing |
| CN108456122A (en) * | 2018-04-02 | 2018-08-28 | 金正大生态工程集团股份有限公司 | One cultivates peanut Special slow release fertilizer and its manufacturing method |
| WO2019192328A1 (en) | 2018-04-02 | 2019-10-10 | 金正大诺泰尔化学有限公司 | Polyphosphoric acid calcium magnesium fertilizer, polyphosphoric acid calcium magnesium fertilizer prepared by using phosphoric acid and phosphorus tailings as raw materials and preparation method therefor |
| CN108456007B (en) * | 2018-04-02 | 2021-05-25 | 金正大生态工程集团股份有限公司 | Calcium-magnesium polyphosphate fertilizer prepared by taking phosphoric acid and phosphate tailings as raw materials and preparation method thereof |
| US11787748B2 (en) | 2018-04-02 | 2023-10-17 | Kingenta Ecological Engineering Group Co., Ltd. | Polyphosphoric acid calcium magnesium fertilizer, polyphosphoric acid calcium magnesium fertilizer prepared by using phosphoric acid and phosphorus tailings as raw material and preparation method therefor |
| CN114133282A (en) * | 2021-11-23 | 2022-03-04 | 谭宏伟 | Preparation method of efficient magnesium polyphosphate fertilizer |
| CN114249610A (en) * | 2021-12-30 | 2022-03-29 | 瓮福达州化工有限责任公司 | Preparation process and device of ammonium potassium polyphosphate containing chelated medium and trace elements |
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Application publication date: 20160413 |