CN1696080A - Slow release fertilizer and preparation method - Google Patents
Slow release fertilizer and preparation method Download PDFInfo
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- CN1696080A CN1696080A CN 200410024201 CN200410024201A CN1696080A CN 1696080 A CN1696080 A CN 1696080A CN 200410024201 CN200410024201 CN 200410024201 CN 200410024201 A CN200410024201 A CN 200410024201A CN 1696080 A CN1696080 A CN 1696080A
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- release fertilizer
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Abstract
A slowly-releasing fertilizer is prepared from urea, potassium sulfate, form-aldehyde, sodium hydroxide, magnesium oxide and catalyst through chemical synthesis. Its advantages are rich nutrients and durable fertility.
Description
Technical field:
The present invention relates to the fertilizer science technical field relevant, especially relate to a kind of slow-release fertilizer and preparation method thereof with plant nutrition.
Background technology:
The present farm crop wheat of China, corn, paddy rice, rape, flowers etc. are used the composite fertilizer or the compound fertilizer of single nitrogenous fertilizer or only nitrogenous phosphorus potassium mostly on fertilizer uses.Above-mentioned fertilizer nutrition is single, and there is not slow-release function, using the back decomposes very fast, have only on a small quantity and absorbed by crop, utilization rate of fertilizer is only between 25%-35%, all the other nutrients volatilize or are run off by rain-out, thereby cause the pollution of rivers water nutrition, serious harm environment and people health.Because above-mentioned fertilizer has lethal to seed and young shoot thereof, the peasant has to repeatedly apply in the fertilising process, at first applies base fertilizer in soil before crop sowing and sows, treats that plant growth initial stage and middle and later periods topdress again, both wasted time and energy, be subjected to the restriction of rainwater again.
Summary of the invention
The present invention is directed to the drawback that above-mentioned fertilizer exists, nutrient chemosynthesis slow release fertilizers such as a kind of nitrogenous, phosphorus, potassium, magnesium are provided, do not need during use to apply fertilizer to the subsoil in advance, can together sow with crop seed, in whole crop growth period, need not to topdress again, match by the automatic release of fertilizer nutrition and the demand of crop, fertilizer utilization ratio reaches more than 65%, and fertilizer efficiency period is long, use the back soil in the nutrient survival rate still can reach more than 35% after 3 years, be that a kind of economy, saving of work and time, preparation method are simple, and the new-type fertilizer of tool environmental-protecting performance.
For reaching above-mentioned technical purpose, the present invention takes following technical scheme: a kind of slow-release fertilizer and preparation method thereof, its slow-release fertilizer are urea, vitriolate of tartar, formaldehyde, sodium hydroxid, catalysts, magnesian composition.Its preparation method is: add a certain amount of water or mother liquor in reactor, heat temperature raising is to 40-60 ℃, is stirred to all solids dissolving after being sequentially added into urea, vitriolate of tartar, formaldehyde, sodium hydroxide and catalysts; In the mediation still, add vitriol oil control pH value,, stir and make it to be cooled to temperature 30-40 ℃ to a large amount of white precipitates occurring.Cool off and filter after 3 hours, filtrate is returned reactor, solid state is intermediates, the sampling analysis nutrient content, and according to each nutrient content situation adding magnesium oxide of centre product, through kneader granulation oven dry, the screening release mesh is packaged to finished product.
Owing to take technique scheme, described slow-release fertilizer and preparation method thereof is compared with conventional fertilizers, can realize that described fertilizer component is scientific and reasonable, the nutrition of contained plant absorbing is abundant, production method is simple, and the rate of application height uses saving of work and time, the method facility, the technical purpose of good environmental protection.
Embodiment:
A kind of slow-release fertilizer and preparation method thereof, its slow-release fertilizer is made of urea, vitriolate of tartar, formaldehyde, sodium hydroxide, catalysts, magnesian composition.
Its preparation method is: (1) adds 600kg water or mother liquor in stirred autoclave, heat temperature raising is to 40-60 ℃, add solid urea 500 ± 1kg, vitriolate of tartar 380 ± 1kg, formaldehyde 250 ± 0.5kg, sodium hydroxide 100 ± 0.5kg, catalysts 5 ± 0.51kg then, stirring reaction to all solids dissolves.
(2) in the mediation still, add strong phosphoric acid control pH value, to a large amount of white precipitates occurring and stir to be cooled to 30-40 ℃.
(3) stir cooling and filter after 3 hours, filtrate is returned reactor, and solid is intermediates, each nutrient contg of sampling analysis.
(4) calculate and adding magnesium oxide according to each nutrient content situation of intermediates, insert kneader granulation oven dry, screening release mesh packaging final prod.
Claims (2)
1, a kind of alleviation fertilizer and preparation method thereof is characterized in that described slow-release fertilizer is made of urea, vitriolate of tartar, formaldehyde, sodium hydroxide, magnesium oxide, catalysts and water or mother liquid compound.
2, a kind of slow-release fertilizer and preparation method thereof is characterized in that described preparation method is:
(1) add quantitative water or mother liquor in reactor, heat temperature raising is to 40-60 ℃, after urea, vitriolate of tartar, formaldehyde, sodium hydroxide, catalysts are added in order successively, is stirred to solid and all dissolves.
(2) add the vitriol oil in the mediation still, the control pH value to a large amount of white precipitates occurring, stirs and makes it to be cooled to 30-40 ℃.
(3) stir 3 hours after-filtration of cooling, filtrate is returned reactor, and solid is intermediates, through each nutrient content of sampling analysis, and according to behind the nutrient content situation calculating adding magnesium oxide, goes kneader granulation oven dry, and the screening release mesh is packaged to finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410024201 CN1696080A (en) | 2004-05-15 | 2004-05-15 | Slow release fertilizer and preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410024201 CN1696080A (en) | 2004-05-15 | 2004-05-15 | Slow release fertilizer and preparation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1696080A true CN1696080A (en) | 2005-11-16 |
Family
ID=35348994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410024201 Pending CN1696080A (en) | 2004-05-15 | 2004-05-15 | Slow release fertilizer and preparation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1696080A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101955379A (en) * | 2010-08-29 | 2011-01-26 | 山东史贝美肥料开发有限公司 | Preparation method for nitrate urea-formaldehyde fertilizer |
| CN114249621A (en) * | 2021-12-27 | 2022-03-29 | 清远市美村生物技术有限公司 | Special solid trace element fertilizer for golf lawn and preparation method thereof |
-
2004
- 2004-05-15 CN CN 200410024201 patent/CN1696080A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101955379A (en) * | 2010-08-29 | 2011-01-26 | 山东史贝美肥料开发有限公司 | Preparation method for nitrate urea-formaldehyde fertilizer |
| CN114249621A (en) * | 2021-12-27 | 2022-03-29 | 清远市美村生物技术有限公司 | Special solid trace element fertilizer for golf lawn and preparation method thereof |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |