CN1491925A - Slow-releasing compound fertilizer with framework structure - Google Patents
Slow-releasing compound fertilizer with framework structure Download PDFInfo
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- CN1491925A CN1491925A CNA031113141A CN03111314A CN1491925A CN 1491925 A CN1491925 A CN 1491925A CN A031113141 A CNA031113141 A CN A031113141A CN 03111314 A CN03111314 A CN 03111314A CN 1491925 A CN1491925 A CN 1491925A
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- controlled release
- slow controlled
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Abstract
The present invention relates to long-acting compound fertilizer, and is especially a kind of slow-releasing compound fertilizer in framework structure. The slow-releasing compound fertilizer has stereo polymer network grains and nutritive component in the meshes of the network. The present invention has the advantage of the slow release of the fertilizer, which forms many small coated grains, in water and soil, and the release is synchronous with the crop growth rule. Therefore, the fertilizer has long fertilizer effect.
Description
Technical field
The present invention relates to durable composite fertilizer, specifically a kind of slow-release compound fertilizer with skeleton construction.
Background technology
In the prior art, conventional chemical nitrogenous fertilizer all has good water-solubility, execute in the soil after very easily the loss, fertilizer efficiency period only can be kept 20～60 days; And phosphate fertilizer is easy to be fixed by adsorption by soil after executing in the soil, becomes invalid attitude, especially in calcareous soil; Thereby development and production can be kept nitrogenous fertilizer long-acting, and to reduce phosphate fertilizer fixed sustained-controll-release fertiliser again very necessary.
Existing release and release control fertilizer adopts chemical slow release agent and high score polymer chemistry coating more, and its controlled-release effect is all not ideal, can not form the best controlled release curve of fertilizer.
Summary of the invention
The purpose of this invention is to provide the slow-release compound fertilizer that a kind of controlled-release effect has skeleton construction well.
For achieving the above object, the technical scheme that the present invention takes is: by the grid particle fertilizer that high molecular polymer constitutes, each granule interior is the film formed network-like space frame structure of polymkeric substance, and nutrition is in each grid of granule interior.
Described high molecular polymer accounts for 0.01～2% of composite fertilizer's gross weight; Described high molecular polymer (controlled-release material) is a polymer resin: polyacrylamide, polyvinyl alcohol, polyoxyethylene, polyvinyl alcohol, polymethyl acrylic acid, polymaleic anhydride, acrylate copolymer, polysaccharide, polymeric amide; Or condensation resinoid: polyamine, quaternary polyamines, Resins, epoxy, resol, aminoresin, Synolac, urethane resin; Described nutrition is N, P, K water soluble fertilizer, and its weight content ratio is N: P
2O
5: K
2O=8～20: 5～20: 5～20; Be preferably N: P
2O
5: K
2O=10～16: 5～10: 5～10; Grain diameter is generally 2～6mm and is preferably 2～4mm; Granule interior forms evenly, successive polymeric frame shelf structure basically, is ball grid more than 95%; The particle outside surface has high molecular polymer to exist more than 90%, comparatively smooth, has slick outside surface basically; Polymer film thickness is generally 5～50 μ m.Filler is in the nutrition: Peng Run soil, pumice sand etc.; Nitrogenous fertilizer raw material:, be aided with ammonium nitrate based on urea; The phosphate fertilizer raw material: monoammonium phosphate is main, is aided with calcium superphosphate, diammonium phosphate; The potash fertilizer raw material: vitriolate of tartar (powdery) is main, is aided with Repone K.
The preparation method of composite fertilizer of the present invention is as follows:
1) takes by weighing two kinds or three kinds of water soluble fertilizers and filler according to fertilizer formula, pulverize granulation; High molecular polymer (controlled-release material) is mixed with the aqueous solution of concentration 0.1%～20% (best 8～10%);
2) in granulation process, spray into the controlled-release material aqueous solution, controlled-release material is formed network-like structure between the powder of water miscible fertilizer components.
The present invention has following advantage:
1. all form at each slow-release compound fertilizer particle by the numerous coating molecule that on its particle surface, is coated with skeleton construction; This fertilizer is built into certain skeleton construction so that this fertilizer can slowly discharge in the water sweetening of the soil, and the growth regulation of fertilizer requirement consistent (or basically identical) of energy and crop.
2. have the slow controlled-release material of skeleton construction and can form water-fast basically coating, so that fertilizer can be accumulated slow release, can reach the initial stage dissolution rate and be not more than 40% after this fertilizer constituent is exposed in the water, the differential dissolution rate is every day 0.25%～2.5%; And the material of skeleton construction is made up of the successive polymeric film basically, exists on 90% fertiliser granulates at least.
3. the slow compound Hefei of controlled release of skeleton construction is compared with common composite fertilizer, and the slow compound Hefei of controlled release of skeleton construction can be controlled nutrient and discharge, and fertilizer efficiency period is long, can reach about 80～100 days, can disposablely make base fertilizer, need not topdress later on, the structure of can improving the soil, pollution-free; The common compound fat nutrient of can not controlling discharges, short 30～50 days of effect phase, and can make base fertilizer, but also need to topdress later, long-term application causes soil compaction easily.
Description of drawings
Fig. 1. have the technological process of production figure of the slow-release compound fertilizer of skeleton construction.
Fig. 2. the slow release profiles of controlled-release compound fertilizer in 30 ℃ of water.
Embodiment
Embodiment 1
Fertilizer is according to N: P
2O
5: K
2O=16: 8: 8 proportionlity, urea, diammonium phosphate, vitriolate of tartar, trace element (can add also as required and can not add) and filler (wilkinite) separated pulverizing are crossed 20 mesh sieve branches, puddle then and evenly join in the rotary drum granulator, start mechanical rotation afterwards, spray into polyvinyl alcohol water solution (concentration 2%) when rotating, the polyvinyl alcohol water solution straying quatity is equivalent to 8% of fertilizer gross weight, make particle remain on 2～4mm size, oven dry then, drying time was at 15～20 minutes; Cooling back packaging final prod.
Wherein the slow-release compound fertilizer processing parameter is: 350～550 ℃ of bake out temperature head hot blast temperatures; The head negative pressure≤-50Pa; Head spray gun whitewashing amount 〉=0.3m
3≤ 0.4m
360～80 ℃ of head gas temperatures; Spray gun compressed air pressure 〉=0.3Mpa; 50～75 ℃ of tail temperature of charge.
Can the physics sustained release during application, effect is obvious
Embodiment 2
According to N: P
2O
5: K
2O=10: 10: 10, use urea, diammonium phosphate, vitriolate of tartar respectively, insufficient part is used wilkinite, makes by aforementioned production method, can pass through physical method sustained release speed; Wherein spray into polyacrylamide solution (concentration 2%), the polyacrylamide solution straying quatity is equivalent to 10% of fertilizer gross weight.
Embodiment 3
According to N: P2O5: K2O=16: 10: 20, use urea, diammonium phosphate, vitriolate of tartar respectively, insufficient part is used wilkinite, makes by aforementioned production method, can pass through physical method sustained release speed; Wherein spray into polyvinyl alcohol water solution (concentration 4%), the polyvinyl alcohol water solution straying quatity is equivalent to 15% of fertilizer gross weight.
Embodiment 4
According to N: P2O5: K2O=17: 10: 13, use urea, diammonium phosphate, vitriolate of tartar respectively, insufficient part is used wilkinite, makes by aforementioned production method, can pass through physical method sustained release speed; Wherein spray into polyacrylamide solution (concentration 4%), the polyacrylamide solution straying quatity is equivalent to 10% of fertilizer gross weight.
Application examples 1
Embodiment 1 and embodiment 2 prepared slow controlled-release compound fertilizers are discharged in 30 ℃ of water, and its release profiles as shown in Figure 2.
Claims (10)
1. slow controlled-release compound fertilizer with skeleton construction, it is characterized in that: by the grid particle fertilizer that high molecular polymer constitutes, each granule interior is the film formed network-like space frame structure of polymkeric substance, and nutrition is in each grid of granule interior.
2. described slow controlled release mixture according to claim 1, it is characterized in that: described high molecular polymer accounts for 0.01～2% of composite fertilizer's gross weight.
3. described slow controlled release mixture according to claim 1, it is characterized in that: described high molecular polymer is polyacrylamide, polyvinyl alcohol, polyoxyethylene, polyvinyl alcohol, polymethyl acrylic acid, polymaleic anhydride, acrylate copolymer, polysaccharide, polymeric amide, polyamine, quaternary polyamines, Resins, epoxy, resol, aminoresin, Synolac or urethane resin.
4. described slow controlled release mixture according to claim 1 is characterized in that: described nutrition is N, P, K water soluble fertilizer, and its weight content ratio is N: P
2O
5: K
2O=8～20: 5～20: 5～20.
5. described slow controlled release mixture according to claim 4, it is characterized in that: described weight content ratio is N: P
2O
5: K
2O=10～16: 5～10: 5～10.
6. described slow controlled release mixture according to claim 1, it is characterized in that: described grain diameter is 2～6mm.
7. described slow controlled release mixture according to claim 1, it is characterized in that: described grain diameter is 2～4mm.
8. described slow controlled release mixture according to claim 1 is characterized in that: described granule interior is ball grid more than 95% for even, successive skeleton construction.
9. described slow controlled release mixture according to claim 1 is characterized in that: described particle outside surface has high molecular polymer to exist more than 90%, comparatively smooth.
10. described slow controlled release mixture according to claim 1 is characterized in that: described polymer film thickness is 5～50 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03111314 CN1280242C (en) | 2003-03-28 | 2003-03-28 | Slow-releasing compound fertilizer with framework structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03111314 CN1280242C (en) | 2003-03-28 | 2003-03-28 | Slow-releasing compound fertilizer with framework structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1491925A true CN1491925A (en) | 2004-04-28 |
| CN1280242C CN1280242C (en) | 2006-10-18 |
Family
ID=34239239
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03111314 Expired - Fee Related CN1280242C (en) | 2003-03-28 | 2003-03-28 | Slow-releasing compound fertilizer with framework structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101898918A (en) * | 2010-07-22 | 2010-12-01 | 河南金双隆复合肥有限公司 | Chelated controlled-release compound fertilizer and preparation method thereof |
| CN104387157A (en) * | 2005-09-29 | 2015-03-04 | 艾弗里斯国际私人有限公司 | Granular controlled release agrochemical compositions and process for the preparation thereof |
| CN105358506A (en) * | 2013-05-24 | 2016-02-24 | 领袖化学有限公司 | Method for manufacturing sustained-release matrix-type granular complex fertilizer and matrix-type granular complex fertilizer obtained therefrom |
-
2003
- 2003-03-28 CN CN 03111314 patent/CN1280242C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104387157A (en) * | 2005-09-29 | 2015-03-04 | 艾弗里斯国际私人有限公司 | Granular controlled release agrochemical compositions and process for the preparation thereof |
| CN101898918A (en) * | 2010-07-22 | 2010-12-01 | 河南金双隆复合肥有限公司 | Chelated controlled-release compound fertilizer and preparation method thereof |
| CN101898918B (en) * | 2010-07-22 | 2013-03-27 | 河南金双隆复合肥有限公司 | Chelated controlled-release compound fertilizer and preparation method thereof |
| CN105358506A (en) * | 2013-05-24 | 2016-02-24 | 领袖化学有限公司 | Method for manufacturing sustained-release matrix-type granular complex fertilizer and matrix-type granular complex fertilizer obtained therefrom |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1280242C (en) | 2006-10-18 |
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Owner name: SHENYANG ZHONGKE NEW FERTILIZER CO., LTD. Free format text: FORMER OWNER: SHENYANG INST. OF APPLIED ECOLOGY, CHINESE ACADEMY OF SCIENCES Effective date: 20090828 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20090828 Address after: No. 72, Wenhua Road, Shenhe District, Liaoning, Shenyang Patentee after: Shenyang Zhongke new type fertilizer Co., Ltd. Address before: No. 72, Wenhua Road, Shenhe District, Liaoning, Shenyang Patentee before: Shenyang Application Ecelogy Inst., Chinese Academy of Sciences |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061018 Termination date: 20150328 |
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| EXPY | Termination of patent right or utility model |