CN1800117A - Method for producing macromolecule control-release dressing fertilizer - Google Patents
Method for producing macromolecule control-release dressing fertilizer Download PDFInfo
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- CN1800117A CN1800117A CN 200510000039 CN200510000039A CN1800117A CN 1800117 A CN1800117 A CN 1800117A CN 200510000039 CN200510000039 CN 200510000039 CN 200510000039 A CN200510000039 A CN 200510000039A CN 1800117 A CN1800117 A CN 1800117A
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Abstract
The invention discloses a method for producing macromolecule layout control-deleting fertilizer. The method heats and smelts the macromolecule material into the organic solution to form the layout liquid and sprays the layout liquid on the fertilizer surface and dries it to obtain the macromolecule layout control-deleting fertilizer, wherein the organic solution is Abies. It uses the Abies as layout material solution to produce the layout fertilizer and the zeolite powder with a plurality of micro molecule as layout additive
Description
Technical field
The present invention relates to produce the method for macromolecule control-release dressing fertilizer.
Background technology
At present, common release and release control fertilizer is a macromolecule control-release dressing fertilizer, promptly adopt the very low macromolecule resin of moisture transmitance as coating material, macromolecular material is sprayed on the fertiliser granulates surface, form the very low resin molding of one deck moisture permeable, after fertilizer is used, moisture in the soil enters in the fertiliser granulates by resin molding, nutrient stripping film is made for thing outward absorbs, the dissolution rate of fertilizer in the film, be exactly the effective velocity that fertilizer nutrient discharges, nutrient controlled release speed is controlled by dressing.
Coated fertilizer production adopts spouted bed dressing mode to produce usually: macromolecular material is dissolved in the solvent, form certain density macromolecular solution, by nozzle solution evenly is sprayed at the fertiliser granulates surface, then with high temperature with solvent evaporates, solvent by the cooling recycling.Its process flow sheet comprises the steps: that (1) is dissolved in macromolecular material more than 100 ℃ in the pyritous organic solvent, forms covering liquid as shown in Figure 1; (2) gas blower 1 will be blown into conduit 3 by the high-pressure blast of well heater 2 heating; (3) fertiliser granulates is added by charging opening 4, flow to nozzle 7 places and is held up by high-pressure blast and pass conduit 3 and fall and flow to nozzle 7 places again and circulate repeatedly; (4) covering liquid wraps in the fertiliser granulates surface by pressure pump 5 sucking-off from dissolving tank 6 by nozzle 7 ejections; (5) high temperature and high speed wind makes it form one deck polymer material film on the fertiliser granulates surface covering liquid drying, and solvent is by condenser 8 recyclings.Wherein, the dissolving macromolecular material is at present both at home and abroad general to use the more of petroleum-type solvent, as toluene, dimethylbenzene, sherwood oil etc., in addition as: trieline, zellon etc.; The polymer coating material is used polyethylene, polypropylene, polystyrene, polyvinyl alcohol, cellulose acetate, match dew etc. more; The dressing additive adopts inorganic minerals such as talcum powder, wilkinite, diatomite more; The dressing object has granular urea, ammonium phosphate, potash fertilizer, various nutrient content composite fertilizer etc.
The macromolecule control-release dressing fertilizer effect is used through for many years and is proved, but because production cost is higher, limits it and use, and the production cost that reduces fertilizer is that current release and release control fertilizer research improves an of paramount importance ring.At present, macromolecule control-release dressing fertilizer production has the following disadvantages:
(1) fertilizer coating material, additive and tooling cost are higher, have limited the application of fertilizer;
(2) used petroleum-type solvent toxicity is higher, production, unfavorable to production and user of service's health when using; And this kind solvent belongs to the inflammable and explosive solvent of one-level more, uses and causes danger easily when preserving, and requires high to the anti-explosion fire of factory building;
(3) other solvents damage the ozone layer as trieline, zellon, and are unfavorable to environment, have been limited to use.
Summary of the invention
The purpose of this invention is to provide a kind of method of producing macromolecule control-release dressing fertilizer.
The method of production macromolecule control-release dressing fertilizer provided by the present invention, be that the macromolecular material heating for dissolving is formed covering liquid in organic solvent, then described covering liquid be sprayed on the fertilizer surface, drying obtains macromolecule control-release dressing fertilizer, wherein, described organic solvent is a turps.
In above-mentioned preparation process, described macromolecular material and described terebinthine ratio of weight and number 5-10: 100, the temperature of described heating for dissolving is 80-150 ℃, described fertilizer and described terebinthine ratio of weight and number are 50-200: 100.
When the preparation coated fertilizer, general how the employing talcum powder are as the dressing additive, talcum powder proportion height, and addition is bigger, and fertilizer dressing amount increases, and has reduced fertilizer nutrient content relatively.In order to improve the available nutrient content of fertilizer, also be added with zeolite powder in the described covering liquid, described zeolite powder and described terebinthine ratio of weight and number are 5-15: 100.
In order to reduce the production cost of fertilizer, can adopt and reclaim macromolecular material as dressing master material, these reclaim macromolecular material can be the waste or used plastics that is used for wrapping material, awning film, mulch film, waste or used plastics tubing etc., as polyethylene, polypropylene, polystyrene etc., after all recyclable, clean to not containing foreign material such as bigger grogs, blade of grass, paper, can be directly used in the fertilizer dressing.
Particulate state fertilizer with certain intensity and good water solubility as compound manure, urea, phosphate fertilizer potash fertilizer etc., all can be used for dressing and makes release and release control fertilizer.
The present invention produces coated fertilizer with turps as the solvent of coating material, compare with the production method of existing coated fertilizer, have following advantage: turps is natural low-toxic solvent, harm to the people in the production is low, and turps belongs to the inflammable and explosive solvent of secondary, keeping requires lower, has reduced the keeping cost; With zeolite powder as the dressing additive, the zeolite powder light specific gravity, than easy and macromolecular material mixing, can use the greater particle size material, addition is less relatively, has reduced material cost, has improved available nutrient of fertilizer content, and contain in the zeolite multiple to crop effectively the trace element, can be crop nutrient be provided; Use the macromolecular material that reclaims as dressing master material, its price is 1/3rd or 1/4th of a novel material price, greatly reduces the production cost of fertilizer, and release and release control fertilizer can be applied on field crop.
Description of drawings
Fig. 1 is the production scheme of coated fertilizer.
Embodiment
The preparation of embodiment 1, macromolecule control-release dressing urea
Preparation technology's flow process such as Fig. 1 comprise the steps:
(1) fetches and receive in the turps solvent that macromolecular material (polyethylene) 8 parts join 100 parts, in reactor (dissolving tank) 6, be heated to 80-120 ℃ and make the macromolecular material dissolving;
(2) get 7 parts of zeolite powders and join in the reactor 6, stir evenly, form covering liquid with stirrer;
(3) get 160 parts of granular ureas and add from charging opening 4, use gas blower 1 to produce, the 50-100 ℃ of wind that is heated by well heater 2 holds up fertilizer, circulates;
(4) covering liquid is pressurizeed through pressure pump 5, spray to the fertilizer surface by nozzle 7, with hot blast solvent is dried simultaneously, form one deck plastic film at particle surface, solvent is by condenser 8 recyclings;
(5) fertilizer of wrapping is emitted in shutdown, and cooling is finished product controlled release coat urea fertilizer, and the dressing rate is 9.1%.
The preparation of embodiment 2, macromolecule control-release dressing urea
Step by embodiment 1 prepares control-release dressing fertilizer, its difference is: replace zeolite powder as additive with talcum powder, macromolecular material (polypropylene): talcum powder: urea: terebinthine ratio of weight and number is 8: 8: 100: 160, the heating for dissolving temperature of macromolecular material is 150 ℃, obtains the dressing rate at last and be 9.8% coated urea.
The nutrient stripping experiment of embodiment 3, control-release dressing fertilizer
The coated urea (sample 2) of embodiment 1 gained coated fertilizer (sample 1) and embodiment 2 is carried out dissolution experiment in 25 ℃ of water, measure the urea content in the water, calculate the solubility rate of fertilizer, the result is as shown in table 1.The result shows that the resultant coated fertilizer of the inventive method can be controlled the release of fertilizer well, and is respond well.
The solubility rate of table 1. coated fertilizer (%)
| Sample | Dissolved 1 day | Dissolved 3 days | Dissolved 7 days | Dissolved 30 days | Dissolved 50 days |
| 1 | 3 | 8 | 15 | 52 | 71 |
| 2 | 4 | 9 | 18 | 61 | 79 |
Claims (8)
1, a kind of method of producing macromolecule control-release dressing fertilizer, be that the macromolecular material heating for dissolving is formed covering liquid in organic solvent, then described covering liquid is sprayed on the fertilizer surface, drying obtains macromolecule control-release dressing fertilizer, it is characterized in that: described organic solvent is a turps.
2, method according to claim 1 is characterized in that: described macromolecular material and described terebinthine ratio of weight and number 5-15: 100.
3, method according to claim 2 is characterized in that: the temperature of described heating for dissolving is 80-150 ℃.
4, according to claim 1 or 2 or 3 described methods, it is characterized in that: also be added with zeolite powder in the described covering liquid, described zeolite powder and described terebinthine ratio of weight and number are 2-15: 100.
5, method according to claim 4 is characterized in that: described fertilizer and described terebinthine ratio of weight and number are 50-200: 100.
6, according to claim 1 or 2 or 3 described methods, it is characterized in that: described fertilizer and described terebinthine ratio of weight and number are 50-200: 100.
7, method according to claim 6 is characterized in that: described macromolecular material is for reclaiming macromolecular material.
8, according to claim 1 or 2 or 3 described methods, it is characterized in that: described macromolecular material is for reclaiming macromolecular material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510000039 CN1800117A (en) | 2005-01-05 | 2005-01-05 | Method for producing macromolecule control-release dressing fertilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510000039 CN1800117A (en) | 2005-01-05 | 2005-01-05 | Method for producing macromolecule control-release dressing fertilizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1800117A true CN1800117A (en) | 2006-07-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510000039 Pending CN1800117A (en) | 2005-01-05 | 2005-01-05 | Method for producing macromolecule control-release dressing fertilizer |
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| CN (1) | CN1800117A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105050982A (en) * | 2013-02-20 | 2015-11-11 | 雅拉英国有限公司 | Fertiliser coating containing micronutrients |
| CN105819945A (en) * | 2016-03-03 | 2016-08-03 | 和县朱韩瓜果种植家庭农场 | Bacteriostasis component-containing granular fertilizer coating membrane paste and preparation method thereof |
-
2005
- 2005-01-05 CN CN 200510000039 patent/CN1800117A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105050982A (en) * | 2013-02-20 | 2015-11-11 | 雅拉英国有限公司 | Fertiliser coating containing micronutrients |
| CN105050982B (en) * | 2013-02-20 | 2019-03-12 | 雅拉英国有限公司 | Chemical fertilizer coating containing microelement |
| CN105819945A (en) * | 2016-03-03 | 2016-08-03 | 和县朱韩瓜果种植家庭农场 | Bacteriostasis component-containing granular fertilizer coating membrane paste and preparation method thereof |
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