CN109574748A - A kind of Synergistic slow release coated fertilizer and preparation method thereof - Google Patents
A kind of Synergistic slow release coated fertilizer and preparation method thereof Download PDFInfo
- Publication number
- CN109574748A CN109574748A CN201811535858.2A CN201811535858A CN109574748A CN 109574748 A CN109574748 A CN 109574748A CN 201811535858 A CN201811535858 A CN 201811535858A CN 109574748 A CN109574748 A CN 109574748A
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- coated fertilizer
- fertilizer
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- urea
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Classifications
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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
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C3/00—Fertilisers containing other salts of ammonia or ammonia itself, e.g. gas liquor
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C9/00—Fertilisers containing urea or urea compounds
-
- 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
- C05G3/80—Soil conditioners
-
- 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
- C05G3/90—Mixtures of one or more fertilisers with additives not having a specially fertilising activity for affecting the nitrification of ammonium compounds or urea in the soil
-
- 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
- C05G5/00—Fertilisers characterised by their form
- C05G5/30—Layered or coated, e.g. dust-preventing coatings
Abstract
The present invention relates to a kind of preparation methods of Synergistic slow release coated fertilizer, comprising: S1: the first coated fertilizer of preparation: the formalin of urea and 20% ~ 40% being stirred in reactor tank, until urea all dissolves, pH value of solution is adjusted to 8 ~ 9 with triethanolamine, and 1 ~ 2h is reacted under room temperature, is adjusted between pH to 5 ~ 6.5, it is heated to 60 ~ 80 DEG C under stiring, continue to stir, until stopping heating when reaction system is close to gel state, the first coated fertilizer is made；S2: the second coated fertilizer of preparation: humic acid 70 ~ 99%, activator 0.5 ~ 1% and polynucleic acid powder 0.5 ~ 29% will uniformly be mixed according to weight percent, the second coated fertilizer is made；S3: being warming up to 60-80 DEG C for the urea master batch of particle size range 2.0mm ~ 5.0mm in revolving drum, and the first coated fertilizer is sprayed onto the surface of urea master batch by spray equipment, and first layer coating is completed in aeration-drying；S4: the fertilizer for completing first layer coating is preheated, 40-50 DEG C is preheated to, adhesive (alginic acid is dissolved in aqueous slkali) is sprayed to the fertilizer surface of fluidisation, then disperse fertilizer surface for the second coated fertilizer, obtain Synergistic slow release coated fertilizer.
Description
Technical field
The present invention relates to technical field of fertilizers, especially a kind of Synergistic slow release coated fertilizer and preparation method thereof.
Background technique
Currently, with agricultural development, fertilizer more and more attention has been paid to.In order to improve utilization rate of fertilizer, it is alleviated or avoided
The method and approach of environmental pollution caused by as fertilizer loss have very much, wherein being modified to fertilizer itself, exploitation is slow
Release, release and release control fertilizer be it is the most efficient and convenient, most can fundamentally solve the problems, such as the hot spot of fertilizer loss.Current coated slow release fertilizer
Development be concentrated mainly in the selection of coated fertilizer.Most common coating agent is sulphur coating and two kinds of coated with resin.Two
The item equal Shortcomings of technology: (1) nitrogen element content is too low in sulphur coating, and thus leads to nitrogen element content in entire coated fertilizer
Also relatively low, about only 35wt% or so.(2) resin coating is difficult natural degradation, such as polyvinyl chloride, polystyrene resin, easily right
Soil causes secondary pollution.
Summary of the invention
In order to solve, nitrogen content in coating agent is too low and problem of easy degradation, the present invention do not provide a kind of Synergistic slow release coating
On the one hand the content of nitrogen in coated fertilizer can be improved in the preparation method of fertilizer, solve coated fertilizer and be not easy pollution degradation soil
On the other hand problem extends fertilizer efficiency period, optimize element proportion and component in fertilizer, increase fertilizer efficiency.The invention further relates to the systems
Synergistic slow release coated fertilizer made from Preparation Method reduces rate of fertilizer.
(2) technical solution
In order to achieve the above object, the main technical schemes that the present invention uses include:
A kind of preparation method of Synergistic slow release coated fertilizer comprising:
S1: the first coated fertilizer of preparation: the formalin of urea and 20% ~ 40% is stirred in reactor tank, until urea is whole
Dissolution adjusts pH value of solution to 8 ~ 9 with triethanolamine, 1 ~ 2h is reacted under room temperature, adjusts between pH to 5 ~ 6.5, heats under stiring
To 60 ~ 80 DEG C, continue to stir, until stopping heating when reaction system is close to gel state, it is spare that the first coated fertilizer is made；
S2: the second coated fertilizer of preparation: will be according to weight percent by humic acid 70 ~ 99%, activator 0.5 ~ 1% and polynucleic acid powder
The uniformly mixing of end 0.5 ~ 29%, it is spare to be made the second coated fertilizer；
S3: the granular urea master batch of particle size range 2.0mm ~ 5.0mm is warming up to 60-80 DEG C in revolving drum, starting revolution
First coated fertilizer, is sprayed onto the surface of urea master batch with pressure pump by cylinder overturning by spray equipment, aeration-drying, so that the
The solidification of one coated fertilizer is in the urea master batch surface, i.e. completion first layer coating；
S4: the fertilizer for completing first layer coating is preheated, preheating temperature uniformly sprays adhesive to 40-50 DEG C, with pressure pump
It is coated onto the fertilizer surface of fluidisation, then the second coated fertilizer is dispersed in the fertilizer surface of fluidisation to get Synergistic slow release coating
Fertilizer；Wherein described adhesive is dissolved in potassium hydroxide aqueous solution for alginic acid and is formed.
As one more preferably embodiment of the present invention, in step S1, the mass percent of formaldehyde is 30%, and urea with
The molar ratio of formaldehyde is 1:1 ~ 2.
As one more preferably embodiment of the present invention, in step S2, the activator is potassium hydroxide.
As one more preferably embodiment of the present invention, in step S2, second coated fertilizer includes 94% humic
Acid, 1% activator and 5% polynucleic acid powder.
As one more preferably embodiment of the present invention, in step S2, second coated fertilizer includes 93% humic
Acid, 1% activator, 1% middle trace element compound and 5% polynucleic acid powder.
As one more preferably embodiment of the present invention, in step S2, second coated fertilizer includes 92% humic
Acid, 1% activator, 1% microbial bacterial agent, 1% middle trace element compound and 5% polynucleic acid powder.
Preferably, the microbial bacterial agent is bacillus subtilis, Rhizobium Inoculant, fixed nitrogen bacteria agent, phosphate solubilizing microorganism
Microbial inoculum, silicate microbial bacterial agent, photosynthetic bacteria microbial inoculum, organic matter fermentation agent, growth promoting bacteria agent, bush mycorrhiza agent or biological prosthetic bacterium
Agent.
Preferably, the middle trace element compound is selected from zinc sulfate, borax, boric acid, manganese sulfate, ammonium molybdate, sulfuric acid
One of copper and ferrous sulfate are a variety of, and middle trace element compound gross mass accounts for the 1% of the second coated fertilizer quality.
As one more preferably embodiment of the present invention, after the completion of step S3, the first coated fertilizer is urea master batch matter
The 5 ~ 8% of amount.
As one more preferably embodiment of the present invention, after step s 4 is completed, the second coated fertilizer is urea master batch matter
The 5 ~ 8% of amount.
It the present invention also provides a kind of Synergistic slow release coated fertilizer, is prepared using any of the above-described embodiment.
(3) beneficial effect
First coated fertilizer of the invention is ureaformaldehyde oligomer, and the monomer of the oligomer is urea and formaldehyde, can make the first coating
Material generates the urea that can be utilized by plant after decomposing, and improves amide nitrogen fertilizer, improves the content of nitrogen in coated fertilizer.It adopts
It uses formaldehyde as polymerized monomer, can utmostly reduce the accounting of C, H, improve the percentage composition of nitrogen.First coated fertilizer and
Two coated fertilizers are the material for being easy to degradation in nature, will not cause secondary pollution to environment.
For the present invention using film-coating technique twice, the second coated fertilizer is the composition such as humic acid, polynucleic acid, can obtain containing humic
The double membrane slow release fertilizer of acid, it is contemplated that used in the dedicated fertilizer suitable for crops such as winter wheat, corn, cotton, peanut, soybean, rice.
Humic acid can be converted into the soil organism, will not destroy soil texture or contaminated soil.Polynucleic acid bio-feritlizer can activate soil
Earth improves resistance, high-quality output, the excellent tonic product of crop.Polynucleic acid is to be with amino acid, starch, sugar such as nucleotide, resistance to propylhomoserins
Primary raw material, a kind of fertilizer synergist obtained using microbial fermentation processes and drying process with atomizing method are added to multiple
Have the function of reducing nitrogen loss in the material of Hefei, reduce water-soluble phosphorus fixation.
In addition, trace element compound in being also added, improve plant sustain life had to magnesium, sulphur, iron, boron,
Amount and microelement in manganese, copper, zinc, molybdenum and chlorine etc..Secondary coating can also alleviate the problem of ureaformaldehyde oligomer too quick decomposition, prolong
The fertilizer efficiency period of long core granular urea master batch.
Bonding agent used in secondary coating is alginic acid, can be used as binder and uses using the material as coating and film forming
Material.Alginic acid can quickly absorb moisture, water-swellable, and alginic acid can reduce the surface tension of water, in plant surface shape
At one layer of coating, increase contact area, makes water-soluble substances be easier to enter plant cell through cauline leaf superficial cell film, make
Plant most effectively absorbs the nutritional ingredient in seaweed extracted liquor, therefore is used in mixed way with chemical fertilizer, and better effect can reduce
Sprinkling expense has synergistic effect to pesticide and chemical fertilizer.Contained natural antibiotics have disease-resistant in foreign countries' report alginic acid
Toxic action.Alginic acid can directly make soil or increase soil by organic matter by plant, activate various beneficial micro- lifes in soil
Object can play a part of catalyst in plant and microbe metabolite circulation, increase the biopotency of soil.The micro- life of soil
The metabolin of object can provide more nutrients for plant.Alginic acid is a kind of natural biological preparation, can be with plant and soil ecology
System harmoniously works.The native compound that it contains such as Sodium Alginate is natural soil conditioner, can promote soil granular
The formation of structure improves soil internal void space, coordinates solid, liquid, gas proportions in soil, restores to bear due to soil
Weight and chemical contamination and lose natural gum balance, increase geobiont vigor, promote the release of available nutrient, be conducive to root
System's growth, improves the resistance of crop.
Specific embodiment
In order to preferably explain the present invention, in order to understanding with reference to specific embodiments retouched in detail to present invention work
It states.
Embodiment 1
The present embodiment provides a kind of Synergistic slow release coated fertilizers, are prepared as follows:
1. preparing the first coated fertilizer: formaldehyde (4.6kg) solution of 1.8kg urea and mass fraction 30% is stirred in reactor tank
It mixes, until urea all dissolves, adjusts pH value of solution to 8 ~ 9 with triethanolamine, 1h is reacted under room temperature, is adjusted between pH to 5 ~ 6,
It is heated to 60 ~ 65 DEG C under stirring, continues to stir, until stopping heating when reaction system is close to gel state, the first coating is made
Materials for later use.
2. preparing the second coated fertilizer: by the polynucleic acid powder of the humic acid of 2.82kg, the potassium hydroxide of 0.3kg and 1.5kg
End uniformly mixes in ball grinder, and it is spare that the second coated fertilizer is made.
3. in revolving drum by granular urea master batch (100kg) pre-heating temperature elevation of particle size range 2.0mm ~ 5.0mm to 60 ~
65 DEG C, the first coated fertilizer is sprayed onto the surface of urea master batch with pressure pump, so by starting revolving drum overturning by spray equipment
Rear venting is dry, so that the solidification of the first coated fertilizer makes the first coating material in the urea master batch surface, i.e. completion first layer coating
Material is the 5 ~ 8% of urea master batch quality.
4. the fertilizer for completing first layer coating is preheated, preheating temperature is uniform by adhesive with pressure pump to 40 ~ 45 DEG C
The fertilizer surface of fluidisation is sprayed to, then the second coated fertilizer is dispersed in the fertilizer surface of fluidisation to get Synergistic slow release packet
Film fertilizer.Wherein, adhesive is to be dissolved in potassium hydroxide aqueous solution by alginic acid to be formed, and viscosity is 200 ~ 300m.Pa.s.Complete two
After secondary coating, make the 5 ~ 8% of the second coated fertilizer urea master batch quality.
Embodiment 2
The present embodiment provides a kind of Synergistic slow release coated fertilizers, are prepared as follows:
1. preparing the first coated fertilizer: formaldehyde (6kg) solution of 1.8kg urea and mass fraction 30% is stirred in reactor tank,
Until urea all dissolves, pH value of solution is adjusted to 8 ~ 9 with triethanolamine, 2h is reacted under room temperature, adjusts between pH to 5 ~ 6, is stirring
It mixes down and is heated to 70 ~ 80 DEG C, continue to stir, until stopping heating when reaction system is close to gel state, the first coating material is made
Expect spare.
2. preparing the second coated fertilizer: by the humic acid of 2.79kg, the potassium hydroxide of 0.3kg, 1.5kg polynucleic acid powder
End, the zinc sulfate of 0.3kg, borax and ferrous sulfate 1:1:1 mixture, uniformly mixed in ball grinder, be made the second coating
Materials for later use.
3. in revolving drum by granular urea master batch (105kg) pre-heating temperature elevation of particle size range 2.0mm ~ 5.0mm to 60 ~
65 DEG C, the first coated fertilizer is sprayed onto the surface of urea master batch with pressure pump, so by starting revolving drum overturning by spray equipment
Rear venting is dry, so that the solidification of the first coated fertilizer makes the first coating material in the urea master batch surface, i.e. completion first layer coating
Material is the 5 ~ 8% of urea master batch quality.
4. the fertilizer for completing first layer coating is preheated, preheating temperature is uniform by adhesive with pressure pump to 40 ~ 45 DEG C
The fertilizer surface of fluidisation is sprayed to, then the second coated fertilizer is dispersed in the fertilizer surface of fluidisation to get Synergistic slow release packet
Film fertilizer.Wherein, adhesive is to be dissolved in potassium hydroxide aqueous solution by alginic acid to be formed, and viscosity is 300 ~ 400m.Pa.s.Complete two
After secondary coating, make the 5 ~ 8% of the second coated fertilizer urea master batch quality.
Embodiment 3
The present embodiment provides a kind of Synergistic slow release coated fertilizers, are prepared as follows:
1. preparing the first coated fertilizer: formaldehyde (6kg) solution of 1.8kg urea and mass fraction 30% is stirred in reactor tank,
Until urea all dissolves, pH value of solution is adjusted to 8 ~ 9 with triethanolamine, 2h is reacted under room temperature, adjusts between pH to 5 ~ 6, is stirring
It mixes down and is heated to 70 ~ 80 DEG C, continue to stir, until stopping heating when reaction system is close to gel state, the first coating material is made
Expect spare.
2. preparing the second coated fertilizer: by the humic acid of 2.76kg, the potassium hydroxide of 0.3kg, 1.5kg polynucleic acid powder
End, the bacillus subtilis of 0.3kg, Rhizobium Inoculant and the mixture of nitrogen-fixing bacteria 1:1:1, the zinc sulfate of 0.3kg, borax, sulphur
Sour manganese, ammonium molybdate, copper sulphate and sulfuric acid Asia 1:1:1:1:1:1 mixture, uniformly mixed in ball grinder, be made the second coating
Materials for later use.
3. in revolving drum by granular urea master batch (120kg) pre-heating temperature elevation of particle size range 2.0mm ~ 5.0mm to 60 ~
65 DEG C, the first coated fertilizer is sprayed onto the surface of urea master batch with pressure pump, so by starting revolving drum overturning by spray equipment
Rear venting is dry, so that the solidification of the first coated fertilizer makes the first coating material in the urea master batch surface, i.e. completion first layer coating
Material is the 5 ~ 8% of urea master batch quality.
4. the fertilizer for completing first layer coating is preheated, preheating temperature is uniform by adhesive with pressure pump to 40 ~ 45 DEG C
The fertilizer surface of fluidisation is sprayed to, then the second coated fertilizer is dispersed in the fertilizer surface of fluidisation to get Synergistic slow release packet
Film fertilizer.Wherein, adhesive is to be dissolved in potassium hydroxide aqueous solution by alginic acid to be formed, and viscosity is 400 ~ 500m.Pa.s.Complete two
After secondary coating, make the 5 ~ 8% of the second coated fertilizer urea master batch quality.
Claims (10)
1. a kind of preparation method of Synergistic slow release coated fertilizer characterized by comprising
S1: the first coated fertilizer of preparation: the formalin of urea and 20%-40% are stirred in reactor tank, until urea is whole
Dissolution adjusts pH value of solution to 8-9 with triethanolamine, 1-2h is reacted under room temperature, adjusts pH between 5-6.5, heat under stiring
To 60-80 DEG C, continue to stir, until stopping heating when reaction system is close to gel state, it is spare that the first coated fertilizer is made；
S2: the second coated fertilizer of preparation: will be according to weight percent by humic acid 70-99%, activator 0.5-1% and polynucleic acid powder
Last 0.5-29% is uniformly mixed, and it is spare that the second coated fertilizer is made；
S3: the granular urea master batch of particle size range 2.0mm-5.0mm is warming up to 60-80 DEG C in revolving drum, starting revolution
First coated fertilizer, is sprayed onto the surface of urea master batch with pressure pump by cylinder overturning by spray equipment, aeration-drying, so that the
The solidification of one coated fertilizer is in the urea master batch surface, i.e. completion first layer coating；
S4: the fertilizer for completing first layer coating is preheated, preheating temperature uniformly sprays adhesive to 40-50 DEG C, with pressure pump
It is coated onto the fertilizer surface of fluidisation, then the second coated fertilizer is dispersed in the fertilizer surface of fluidisation to get Synergistic slow release coating
Fertilizer；Wherein described adhesive is dissolved in potassium hydroxide aqueous solution for alginic acid and is formed.
2. preparation method according to claim 1, which is characterized in that in step S1, the mass percent of formaldehyde is 30%,
And the molar ratio of urea and formaldehyde is 1:1-2.
3. preparation method according to claim 1, which is characterized in that in step S2, the activator is potassium hydroxide.
4. preparation method according to claim 1, which is characterized in that in step S2, second coated fertilizer includes 94%
Humic acid, 1% activator and 5% polynucleic acid powder.
5. preparation method according to claim 1, which is characterized in that in step S2, second coated fertilizer includes 93%
Humic acid, 1% activator, 1% middle trace element compound and 5% polynucleic acid powder.
6. preparation method according to claim 1, which is characterized in that second coated fertilizer include 92% humic acid,
1% activator, 1% microbial bacterial agent, 1% middle trace element compound and 5% polynucleic acid powder.
7. preparation method according to claim 5 or 6, which is characterized in that the middle trace element compound is selected from sulphur
One of sour zinc, borax, boric acid, manganese sulfate, ammonium molybdate, copper sulphate and ferrous sulfate are a variety of, middle trace element compound
Gross mass accounts for the 1% of the second coated fertilizer quality.
8. preparation method according to claim 1, which is characterized in that after the completion of step S3, the first coated fertilizer is urea
The 5-8% of master batch quality.
9. preparation method according to claim 1, which is characterized in that after step s 4 is completed, the second coated fertilizer is urine
The 5-8% of plain master batch quality.
10. a kind of Synergistic slow release coated fertilizer is made using any one of the claim 1-8 preparation method.
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| CN201811535858.2A CN109574748A (en) | 2018-12-14 | 2018-12-14 | A kind of Synergistic slow release coated fertilizer and preparation method thereof |
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| CN201811535858.2A CN109574748A (en) | 2018-12-14 | 2018-12-14 | A kind of Synergistic slow release coated fertilizer and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111454107A (en) * | 2020-03-02 | 2020-07-28 | 中化农业（临沂）研发中心有限公司 | Coated urea containing humic acid and preparation method and application thereof |
| CN115180990A (en) * | 2022-07-15 | 2022-10-14 | 中盐安徽红四方肥业股份有限公司 | Synergistic urea ammonium nitrogen fertilizer and preparation method thereof |
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| CN102653503A (en) * | 2012-05-18 | 2012-09-05 | 成都市新都化工股份有限公司 | Double-envelope composite fertilizer production method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111454107A (en) * | 2020-03-02 | 2020-07-28 | 中化农业（临沂）研发中心有限公司 | Coated urea containing humic acid and preparation method and application thereof |
| CN111454107B (en) * | 2020-03-02 | 2022-04-26 | 中化农业（临沂）研发中心有限公司 | Coated urea containing humic acid and preparation method and application thereof |
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Application publication date: 20190405 |