CN104262062A - Coated urea - Google Patents
Coated urea Download PDFInfo
- Publication number
- CN104262062A CN104262062A CN201410314341.6A CN201410314341A CN104262062A CN 104262062 A CN104262062 A CN 104262062A CN 201410314341 A CN201410314341 A CN 201410314341A CN 104262062 A CN104262062 A CN 104262062A
- Authority
- CN
- China
- Prior art keywords
- urea
- sumstar
- coated carbamide
- coating agent
- density polyethylene
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- 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
- C05G5/00—Fertilisers characterised by their form
- C05G5/30—Layered or coated, e.g. dust-preventing coatings
Abstract
The invention discloses coated urea. The coated urea comprises urea and a coating agent. The coating agent is degradable low density polyethylene and oxidized starch. The oxidized starch is oxidized starch oxidized by hydrogen peroxide. The coated urea is high in utilization rate, reduces loss of the urea, and allows ammonia generated by urea decomposition to be stored in soil for a long period of time. A preparing method is simple, and is simple and convenient in operation.
Description
Technical field
The present invention relates to chemical fertilizer field agriculturally, particularly relate to a kind of coated carbamide.
Background technology
Traditional fertilizer major part composition is because of leaching, run off, decompose, volatilize and lose, what be finally absorbed by plants is very low, not only cause huge loss, and also increase the fertilising cost of peasant, therefore it is necessary for developing slow release fertilizer, improve the utilization ratio of chemical fertilizer, Sustainable Development high-efficiency agriculture has become the topic that everybody pays close attention to, carrying out coated slow-release or control to chemical fertilizer is the utilization ratio important method improving chemical fertilizer, coated fertilizer is the one of slow release fertilizer, slow material that is molten or insoluble is utilized to wrap up Quick-dissolving fertilizer, utilize rete size, chemistry or biological decomposition speed control nutrient releasing speed to supply Crop, performance due to rete can affect the performance of fertilizer, the composition of coating how is selected to be a vital selection, now commercially the film surface of many products easily forms the aperture compared with big scale, the easy Fast Stripping of fertilizer nutrient, and rete easily comes off in transportation, affect their sustained release performance.
Summary of the invention
Problem to be solved by this invention is: provide a kind of coated carbamide, described coated carbamide has sustained release performance, the utilization ratio of chemical fertilizer can be improved, surface is not easy to form the aperture compared with big scale, fertilizer nutrient can slowly slowly be absorbed by the crop in soil, and rete there will not be obscission in transportation.
In order to solve the problem, technical scheme of the present invention is a kind of coated carbamide, described coated carbamide comprises urea and coating agent, and described coating agent is degradable Low Density Polyethylene and Sumstar 190, and described Sumstar 190 is the Sumstar 190 after hydrogen peroxide oxidation.
Further, the preparation method of coated carbamide is as follows,
1) urea is carried out screening process, choosing particle size diameter is urea granules between 5mm ~ 6mm;
2) add a small amount of water to Low Density Polyethylene and Sumstar 190 and carry out mixed preparing solution, the ratio of Low Density Polyethylene and Sumstar 190 is 3:1, is sent into by the mixing solutions mixed in coating agent tank;
3) send in tablets press the urea granules chosen, and carry out heat treated, Heating temperature is 80 ~ 90 DEG C, after heating 5 ~ 10min, is sprayed by mixed solution in coating agent tank to the urea granules in tablets press;
4), after spraying end of processing, stop, to urea granules heating, after drying, cooling, can finished product being obtained.
Further, described step 3) in the total mass of Low Density Polyethylene and described Sumstar 190 account for described step 1) in the quality 0.8% ~ 2% of urea after screening.
Further, described step 3) in the rotary drum rotating speed of tablets press be 6r/min.
Further, described step 4) middle employing warm air drying, air-flow cools, and the temperature of warm air drying is 80 DEG C ~ 90 DEG C, and the temperature of air-flow cooling is 30 DEG C ~ 40 DEG C.
Beneficial effect of the present invention: the utilization ratio of described coated carbamide is high, can reduce the loss of urea, and the ammonia that urea decomposition is produced is kept in soil for a long time; Preparation method is simple, simple to operation.
Embodiment
A kind of coated carbamide, coated carbamide comprises urea and coating agent, and coating agent is degradable Low Density Polyethylene and Sumstar 190, and Sumstar 190 is the Sumstar 190 after hydrogen peroxide oxidation, and the preparation method of coated carbamide is as follows,
1) urea is carried out screening process, choosing particle size diameter is 40kg urea granules between 5mm;
2) a small amount of water is added to Low Density Polyethylene and Sumstar 190 and carries out mixed preparing solution, Low Density Polyethylene be 0.3kg, 0.1kg respectively with the quality of Sumstar 190, the mixing solutions that mixes is sent in coating agent tank;
3) send in tablets press to the urea granules chosen, and carry out heat treated, Heating temperature is 80 DEG C, after heating 5min, mixed solution in coating agent tank is sprayed the urea granules in tablets press, step 3) in the rotary drum rotating speed of tablets press be 6r/min;
4), after sprinkling end of processing, stop, to urea granules heating, after drying, cooling, can finished product being obtained, step 4) middle employing warm air drying, air-flow cools, and the temperature of warm air drying is 80 DEG C, and the temperature that air-flow cools is 30 DEG C.
Apply fertilizer to paddy rice after being mixed with potash fertilizer, phosphate fertilizer by coated carbamide obtained for above-mentioned steps, apply fertilizer with every mu of 30kg ~ 40kg to paddy rice, employing common urea and potash fertilizer, phosphate fertilizer mixed fertilizer are with every mu
30kg ~ 40kg applies fertilizer to paddy rice; Output after fertilising is as following table:
| Fertilizer | Output | Rate of increase |
| Adopt the mixed fertilizer of coated carbamide | 403kg | ? |
| Common mixed fertilizer expects | 448kg | 11.1％ |
Above three embodiments of the present invention have been described in detail, but described content being only preferred embodiment of the present invention, can not being considered to for limiting practical range of the present invention.All equalizations done according to the present patent application scope change and improve, and all should still belong within patent covering scope of the present invention.
Claims (5)
1. a coated carbamide, is characterized in that, described coated carbamide comprises urea and coating agent, and described coating agent is degradable Low Density Polyethylene and Sumstar 190, and described Sumstar 190 is the Sumstar 190 after hydrogen peroxide oxidation.
2. a coated carbamide, is characterized in that, the preparation method of coated carbamide is as follows,
1) urea is carried out screening process, choosing particle size diameter is urea granules between 5mm ~ 6mm;
2) add a small amount of water to Low Density Polyethylene and Sumstar 190 and carry out mixed preparing solution, the ratio of Low Density Polyethylene and Sumstar 190 is 3:1, is sent into by the mixing solutions mixed in coating agent tank;
3) send in tablets press the urea granules chosen, and carry out heat treated, Heating temperature is 80 ~ 90 DEG C, after heating 5 ~ 10min, is sprayed by mixed solution in coating agent tank to the urea granules in tablets press;
4), after spraying end of processing, stop, to urea granules heating, after drying, cooling, can finished product being obtained.
3. coated carbamide according to claim 3, is characterized in that, described step 3) in the total mass of Low Density Polyethylene and described Sumstar 190 account for described step 1) in the quality 0.8% ~ 2% of urea after screening.
4. coated carbamide according to claim 4, is characterized in that, described step 3) in the rotary drum rotating speed of tablets press be 6r/min.
5. coated carbamide according to claim 5, is characterized in that, described step 4) middle employing warm air drying, air-flow cools, and the temperature of warm air drying is 80 DEG C ~ 90 DEG C, and the temperature of air-flow cooling is 30 DEG C ~ 40 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410314341.6A CN104262062A (en) | 2014-07-02 | 2014-07-02 | Coated urea |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410314341.6A CN104262062A (en) | 2014-07-02 | 2014-07-02 | Coated urea |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104262062A true CN104262062A (en) | 2015-01-07 |
Family
ID=52153684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410314341.6A Pending CN104262062A (en) | 2014-07-02 | 2014-07-02 | Coated urea |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104262062A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106380314A (en) * | 2016-08-31 | 2017-02-08 | 天津市施易得肥料有限公司 | Insect-proofing charcoal rot slow-release urea |
| CN109553477A (en) * | 2018-12-28 | 2019-04-02 | 广西壮族自治区林业科学研究院 | A kind of illiciumverum grows into forest special-purpose control-release fertilizer and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2103640A1 (en) * | 1992-08-13 | 1994-02-14 | Toshio Fujita | A coated granular fertilizer |
| JP2000053481A (en) * | 1998-08-05 | 2000-02-22 | Asahi Chem Ind Co Ltd | Mixed fertilizer containing coated nitrification suppressor |
| CN101037368A (en) * | 2007-02-12 | 2007-09-19 | 山东省农业科学院土壤肥料研究所 | Biological biodegradable self-control slow-releasing fertilizer and preparation method thereof |
| CN101215202A (en) * | 2007-12-27 | 2008-07-09 | 山东大学 | Leaf vegetable release-controlling fertilizer |
| CN102424641A (en) * | 2011-09-20 | 2012-04-25 | 山东大学 | Corn slow-release fertilizer |
-
2014
- 2014-07-02 CN CN201410314341.6A patent/CN104262062A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2103640A1 (en) * | 1992-08-13 | 1994-02-14 | Toshio Fujita | A coated granular fertilizer |
| CN1085883A (en) * | 1992-08-13 | 1994-04-27 | 窒素株式会社 | Cated granulated fertilizer |
| JP2000053481A (en) * | 1998-08-05 | 2000-02-22 | Asahi Chem Ind Co Ltd | Mixed fertilizer containing coated nitrification suppressor |
| CN101037368A (en) * | 2007-02-12 | 2007-09-19 | 山东省农业科学院土壤肥料研究所 | Biological biodegradable self-control slow-releasing fertilizer and preparation method thereof |
| CN101215202A (en) * | 2007-12-27 | 2008-07-09 | 山东大学 | Leaf vegetable release-controlling fertilizer |
| CN102424641A (en) * | 2011-09-20 | 2012-04-25 | 山东大学 | Corn slow-release fertilizer |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106380314A (en) * | 2016-08-31 | 2017-02-08 | 天津市施易得肥料有限公司 | Insect-proofing charcoal rot slow-release urea |
| CN109553477A (en) * | 2018-12-28 | 2019-04-02 | 广西壮族自治区林业科学研究院 | A kind of illiciumverum grows into forest special-purpose control-release fertilizer and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150107 |
|
| RJ01 | Rejection of invention patent application after publication |