CN102020510A - Styrene acrylic emulsion-paraffin-attapulgite composite envelope slow-release nitrogen fertilizer and preparation method thereof - Google Patents
Styrene acrylic emulsion-paraffin-attapulgite composite envelope slow-release nitrogen fertilizer and preparation method thereof Download PDFInfo
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- CN102020510A CN102020510A CN2010105239947A CN201010523994A CN102020510A CN 102020510 A CN102020510 A CN 102020510A CN 2010105239947 A CN2010105239947 A CN 2010105239947A CN 201010523994 A CN201010523994 A CN 201010523994A CN 102020510 A CN102020510 A CN 102020510A
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- 229960000892 attapulgite Drugs 0.000 title claims abstract description 60
- 229910052625 palygorskite Inorganic materials 0.000 title claims abstract description 60
- 239000000618 nitrogen fertilizer Substances 0.000 title claims abstract description 31
- 239000002131 composite material Substances 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 229920001909 styrene-acrylic polymer Polymers 0.000 title abstract 6
- 239000012188 paraffin wax Substances 0.000 claims abstract description 42
- 239000000839 emulsion Substances 0.000 claims abstract description 33
- 239000000843 powder Substances 0.000 claims abstract description 27
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000004202 carbamide Substances 0.000 claims abstract description 21
- 239000004927 clay Substances 0.000 claims abstract description 20
- 239000000654 additive Substances 0.000 claims abstract description 4
- 230000000996 additive effect Effects 0.000 claims abstract description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims description 157
- 238000000576 coating method Methods 0.000 claims description 42
- 239000011248 coating agent Substances 0.000 claims description 39
- 239000007921 spray Substances 0.000 claims description 20
- 238000007599 discharging Methods 0.000 claims description 15
- 239000004575 stone Substances 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 11
- 238000001035 drying Methods 0.000 claims description 8
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 6
- 230000007704 transition Effects 0.000 claims description 5
- 239000008187 granular material Substances 0.000 claims description 3
- 230000004927 fusion Effects 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims description 2
- 238000013268 sustained release Methods 0.000 claims description 2
- 239000012730 sustained-release form Substances 0.000 claims description 2
- 239000003337 fertilizer Substances 0.000 abstract description 25
- 235000015097 nutrients Nutrition 0.000 abstract description 15
- 239000002689 soil Substances 0.000 abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 239000003795 chemical substances by application Substances 0.000 abstract description 4
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- -1 band blue light Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
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- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 239000004169 Hydrogenated Poly-1-Decene Substances 0.000 description 1
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 1
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- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- HZVVJJIYJKGMFL-UHFFFAOYSA-N almasilate Chemical compound O.[Mg+2].[Al+3].[Al+3].O[Si](O)=O.O[Si](O)=O HZVVJJIYJKGMFL-UHFFFAOYSA-N 0.000 description 1
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Landscapes
- Fertilizers (AREA)
Abstract
The invention discloses a styrene acrylic emulsion-paraffin-attapulgite composite envelope slow-release nitrogen fertilizer and a preparation method thereof, wherein in the composite envelope slow-release nitrogen fertilizer, an inner layer envelope is formed on the surface of urea by styrene acrylic emulsion and attapulgite clay powder; and an outer envelope is formed on the surface of the inner layer envelope by paraffin. In the preparation method, the preparation of the styrene acrylic emulsion-paraffin-attapulgite composite envelope slow-release nitrogen fertilizer is finished by twice envelops, wherein, in the primary envelope, the styrene-acrylic emulsion is used as an envelope agent, and the attapulgite clay powder is used as an anti-caking slow-release agent; the urea particles sprayed with the styrene-acrylic emulsion are packaged and dried by using the attapulgite clay powder; in the secondary envelope, the paraffin used as an additive is heated, melted, and sprayed on the surface of the product in the primary envelope. Through the adsorption effect of the attapulgite to the fertilizer nutrition and the blocking effect of the attapulgite to the soil pore space water permeation, the nutrient of the nitrogen fertilizer is delayed to release, thus reaching the preferable effects.
Description
One, technical field
The present invention relates to a kind of slow-release nitrogen fertilizer and preparation method thereof, specifically a kind of benzene emulsion-paraffin-composite coated slow-released nitrogenous fertilizer of attapulgite and preparation method thereof.
Two, background technology
Common nitrogenous fertilizer is being manured into soil after volatilization, leaching and denitrification, and rate of loss is up to 70%, and this will cause the huge wasting of resources and to the pollution of environment, water quality.Fertilizer coating slow/controlled release technology is to form the protectiveness film on instantly-soluble fertiliser granulates surface, delays fertilizer nutrient and discharges, and can improve the utilization ratio of readily avaiable fertilizer effectively.Different coated fertilizers and the formed coating layer diversity structure of coating process make the coated fertilizer nutrient releasing mechanism and the characteristic of different mould material prescriptions different, and the development of release-controlled film material becomes fertilizer slow/controlled release technology key in application factor.
At present, obtained bigger progress in domestic and international research, the development and application, but the general more complicated of coated slow-release material cost height or manufacture craft causes coated fertilizer to cost an arm and a leg at controlled release fertilizer.
Benzene emulsion is to be got through emulsion copolymerization by vinylbenzene and acrylate monomer, is milky white liquid, band blue light, solids content 40-45%, viscosity 80-1500mPas, level of residual monomers 0.5%, pH value 8-9.Benzene emulsion sticking power is good, and glued membrane is transparent, water-fast, oil resistant, heat-resisting, ageing-resistant performance is good.Benzene emulsion has purposes very widely as the important middle Chemicals of a class, and is main at present as building coating, metallic surface latex coating, floor coating, paper tackiness agent and tackiness agent.
Paraffin is a kind of of mineral wax, also is a kind of of petroleum wax; Be to make slack wax through solvent treatment, solvent dewaxing or through wax freezing and crystallizing, squeezing dewaxing from the lubricating oil distillate of crude distillation gained, again through solvent deoiling, refining and sheet or needle crystal.Claim crystalline wax again, carbonatoms is about the hydrocarbon mixture of 18-30, and main ingredient is a straight-chain paraffin, is about 80%-95%, also has on a small quantity with the alkane of indivedual side chains and the single-ring naphthene of belt length side chain, and both add up to content below 20%.Main quality index is fusing point and oleaginousness, and the former represents temperature resistant capability, and the latter represents purity.Every class wax is pressed fusing point again, generally every 2 ℃, is divided into different kinds, as 52,54, and 56,58 trades mark such as grade.According to processing and refining degree difference, can be divided into 3 kinds of paraffin wax fully refined, SEMI-REFINED PARAFFIN WAX and scale waxs.Wherein wider with the former two's purposes, main component and wrapping material as food and other commodity (as paraffin paper, wax crayon, candle, transfer paper), the baking container be coated with dressing, cosmetic material, be used for fruit freshness preserving, improve the rubber resistance to deterioration and increase aspects such as snappiness, electric elements insulation, precision casting, also can be used for oxidation and generate synthetic fatty acid.Scale wax is mainly used in and makes match, fiberboard, sail cloth etc. because oleaginousness is more.After adding polyolefin additive in the paraffin, its fusing point increases, and adhesivity and snappiness increase, and is widely used in wrapping paper, the cardboard of protection against the tide, waterproof, the top coat and the candle production of some textiles.
Attapulgite is a kind of layered magnesium aluminosilicate clays mineral, attapulgite clay is to be the clay Mineral resources of major ingredient with the attapulgite, attapulgite is given the effect of attapulgite clay good adsorption, katalysis, rheological and thermotolerance owing to having special structure, and product is widely used in industry such as oil, chemical industry, building materials, papermaking, medicine, agriculture and animal husbandry, nuclear power, sun power, food and silicate.
The nonmetallic mineral material attapulgite clay that good environmental protection and cost are low has good suction nitrogen, guarantor's nitrogen function and suction, water retaining function, and it is not used can bring soil pollution, and the water conservation that can improve the soil and nutrient preserving capability energy.Attapulgite clay also contains biological necessary macronutrient such as Na, K, Fe, Mo, Mn, Se, Sr, I, B etc. except its main component Si, elements such as Al, Mg.Therefore the attapulgite clay fertilizer deficiency that can replenish multiple micronutrient element in the soil.By water and bioactive effect, a part forms soluble trace elements and is absorbed by farm crop these trace elements in soil.But the related application of this quasi-mineral in slow release fertilizer is not reported at present.
Three, summary of the invention
The present invention is for avoiding above-mentioned existing in prior technology weak point, a kind of benzene emulsion-paraffin-composite coated slow-released nitrogenous fertilizer of attapulgite and preparation method thereof is provided, utilize the low advantage of attapulgite cost, reduce the price of film-coated and slow release fertilizer, reduce the cost of agriculture production.
Technical solution problem of the present invention adopts following technical scheme:
The characteristics of benzene emulsion-paraffin of the present invention-composite coated slow-released nitrogenous fertilizer of attapulgite are to form the internal layer coating in urea surface with benzene emulsion and attapulgite clay powder, form outer coating on the surface of described internal layer coating with paraffin, and the consumption of each material is:
Nitrogenous mass percent for＞46.4%, grain diameter is the urea 100g of 3-4mm;
Second-order transition temperature is 55 ℃ benzene emulsion 40-60mL;
Industrial paraffin 20-30g;
Grain diameter is 200-325 purpose attapulgite clay powder 4-6g.
The preparation method's of benzene emulsion-paraffin of the present invention-composite coated slow-released nitrogenous fertilizer of attapulgite characteristics are: finish the preparation of benzene emulsion-paraffin-composite coated slow-released nitrogenous fertilizer of attapulgite through twice coating;
Coating for the first time: use benzene emulsion as coating agent, attapulgite clay powder as the anti-caking sustained release dosage; The urea granules that has sprayed benzene emulsion is wrapped up, dries with the attapulgite clay powder;
Coating for the second time: after will heating paraffin fusion, be sprayed on the product surface of coating gained for the first time as additive.
The preparation method's of benzene emulsion-paraffin of the present invention-composite coated slow-released nitrogenous fertilizer of attapulgite characteristics also are:
Described first time coating: dressing machine rotating speed be set be 60r/min, preheating temperature and be 50-70 ℃ and in dressing machine rotary drum, drop into the urea preheating after 10 minutes, use spray gun in rotary drum, to spray into benzene emulsion, simultaneously in dressing machine rotary drum, drop into concave and convex rod stone powder, after having sprayed benzene emulsion, the dressing organizational security is held rotating speed, keeps Heating temperature, discharging after 5 minutes, described discharging is carried out drying with 50 ℃, gets siccative;
Described second time coating: coating gained siccative drops into the dressing machine again for the first time, it is that 50r/min, Heating temperature are 60-80 ℃ that dressing machine rotating speed is set, the use spray gun sprays into the paraffin through heating and melting in rotary drum, after having sprayed paraffin, close electric furnace, the dressing organizational security is held rotating speed, and discharging after 10 minutes gets the composite coated slow-released nitrogenous fertilizer of benzene emulsion-paraffin-attapulgite.
Compared with the prior art, beneficial effect of the present invention is embodied in:
1, the present invention selects for use general, the inexpensive attapulgite clay of characteristic with special crystal habit and nano-pore structure and absorption property excellence as the fertile functional materials of slow/controlled release, be rolled in the granular urea surface with benzene emulsion, paraffin superpacket, make the composite coated urea slow/controlled release of attapulgite-paraffin-benzene emulsion fertilizer, to the adsorption of chemical fertilizer nutrient, the retardation of soil pore water infiltration is delayed release to chemical fertilizer nutrient, obtained good result by attapulgite.
2, the present invention prevents caking with concave and convex rod stone powder, utilizes the good adsorption property of concave and convex rod stone powder own simultaneously, improves the slow release effect of coated product.
3, in the inventive method, micropore can appear in the film surface in first time coating process, by the coating second time, at surface spraying paraffin, makes it be embedded in the micropore place, can effectively improve slow release effect.
Four, embodiment
Embodiment 1:
In the present embodiment, the composite coated slow-released nitrogenous fertilizer of benzene emulsion-paraffin-attapulgite is to form the internal layer coating in urea surface with benzene emulsion and concave and convex rod stone powder, forms outer coating on the surface of internal layer coating with paraffin, and the consumption of each material is:
Nitrogenous mass percent for＞46.4%, grain diameter is the urea 100g of 3-4mm;
Second-order transition temperature is 55 ℃ benzene emulsion 40mL;
Industrial paraffin 30g;
Grain diameter is 200～325 purpose concave and convex rod stone powder 4g.
Benzene emulsion-paraffin in this implementation column-preparation method of the composite coated slow-released nitrogenous fertilizer of attapulgite operates according to the following procedure:
1, dressing machine rotating speed being set is that 60r/min, preheating temperature are 50 ℃; In dressing machine rotary drum, drop into the urea preheating after 10 minutes, use spray gun in rotary drum, to spray into benzene emulsion, simultaneously in dressing machine rotary drum, drop into concave and convex rod stone powder, after having sprayed benzene emulsion, the dressing organizational security is held rotating speed and temperature, discharging after 5 minutes, described discharging got siccative in 60 minutes with 50 ℃ of dryings;
2, siccative is dropped into the dressing machine again, it is that 50r/min, Heating temperature are 60 ℃ that dressing machine rotating speed is set, and uses spray gun to spray into paraffin in rotary drum, after having sprayed paraffin, the dressing organizational security is held rotating speed and temperature, and discharging after 10 minutes gets the composite coated slow-released nitrogenous fertilizer of benzene emulsion-paraffin-attapulgite.
In concrete the enforcement, used attapulgite clay is that the depolymerization of attapulgite mineral disperses the back drying, pulverizes back gained attapulgite powder, and is good to the absorption property of nutrient.
Because the loss of various coated fertilizers in the coating process, the coating rate of the benzene emulsion-paraffin that finally makes-composite coated slow-released nitrogenous fertilizer of attapulgite is 25.37%.
According to " slow release fertilizer " national standard (GB/T 23348-2009), slow release fertilizer will soak 24 hour initial stage nutrient release rate and accumulate the nutrient release rate less than 80% less than 15%, 28 day in 25 ℃ of hydrostatic.
The contrast of table 1 product index
By table 1 as seen, product of the present invention meets national standard.
Embodiment 2:
In the present embodiment, the composite coated slow-released nitrogenous fertilizer of benzene emulsion-paraffin-attapulgite is to form the internal layer coating in urea surface with benzene emulsion and concave and convex rod stone powder, forms outer coating on the surface of internal layer coating with paraffin, and the consumption of each material is:
Nitrogenous mass percent for＞46.4%, grain diameter is the urea 100g of 3-4mm;
Second-order transition temperature is the benzene emulsion 60mL of 55 degree;
Industrial paraffin 20g;
Grain diameter is 200-325 purpose concave and convex rod stone powder 6g.
Benzene emulsion-paraffin in this implementation column-preparation method of the composite coated slow-released nitrogenous fertilizer of attapulgite operates according to the following procedure:
1, dressing machine rotating speed being set is that 60r/min, preheating temperature are 60 ℃; In dressing machine rotary drum, drop into the urea preheating after 10 minutes, use spray gun in rotary drum, to spray into benzene emulsion, simultaneously in dressing machine rotary drum, drop into concave and convex rod stone powder, after having sprayed benzene emulsion, the dressing organizational security is held rotating speed and temperature, discharging after 5 minutes, described discharging got siccative in 60 minutes with 50 ℃ of dryings;
2, siccative is dropped into the dressing machine again, it is that 50r/min, Heating temperature are 70 ℃ that dressing machine rotating speed is set, and uses spray gun to spray into paraffin in rotary drum, after having sprayed paraffin, the dressing organizational security is held rotating speed and temperature, and discharging after 10 minutes gets the composite coated slow-released nitrogenous fertilizer of benzene emulsion-paraffin-attapulgite.
In concrete the enforcement, used attapulgite clay is that the depolymerization of attapulgite mineral disperses the back drying, pulverizes back gained attapulgite powder, and is good to the absorption property of nutrient.
Because the loss of various coated fertilizers in the coating process, the coating rate of the benzene emulsion-paraffin that finally makes-composite coated slow-released nitrogenous fertilizer of attapulgite is 27.94%.
According to " slow release fertilizer " national standard (GB/T 23348-2009), slow release fertilizer will soak 24 hour initial stage nutrient release rate and accumulate the nutrient release rate less than 80% less than 15%, 28 day in 25 ℃ of hydrostatic.
The contrast of table 2 product index
By table 2 as seen, product of the present invention meets national standard.
Embodiment 3:
In the present embodiment, the composite coated slow-released nitrogenous fertilizer of benzene emulsion-paraffin-attapulgite is to form the internal layer coating in urea surface with benzene emulsion and concave and convex rod stone powder, forms outer coating on the surface of internal layer coating with paraffin, and the consumption of each material is:
Nitrogenous mass percent for＞46.4%, grain diameter is the urea 100g of 3-4mm;
Second-order transition temperature is the benzene emulsion 50mL of 55 degree;
Industrial paraffin 30g;
Grain diameter is 200～325 purpose concave and convex rod stone powder 5g.
Benzene emulsion-paraffin in this implementation column-preparation method of the composite coated slow-released nitrogenous fertilizer of attapulgite operates according to the following procedure:
1, dressing machine rotating speed being set is that 60r/min, preheating temperature are 70 ℃; In dressing machine rotary drum, drop into the urea preheating after 10 minutes, use spray gun in rotary drum, to spray into benzene emulsion, simultaneously in dressing machine rotary drum, drop into concave and convex rod stone powder, after having sprayed benzene emulsion, the dressing organizational security is held rotating speed and temperature, discharging after 5 minutes, described discharging got siccative in 60 minutes with 50 ℃ of dryings;
2, siccative is dropped into the dressing machine again, it is that 50r/min, Heating temperature are 80 ℃ that dressing machine rotating speed is set, and uses spray gun to spray into paraffin in rotary drum, after having sprayed paraffin, the dressing organizational security is held rotating speed and temperature, and discharging after 10 minutes gets the composite coated slow-released nitrogenous fertilizer of benzene emulsion-paraffin-attapulgite.
In concrete the enforcement, used attapulgite clay is that the depolymerization of attapulgite mineral disperses the back drying, pulverizes back gained attapulgite powder, and is good to the absorption property of nutrient.
Because the loss of various coated fertilizers in the coating process, the coating rate of the benzene emulsion-paraffin that finally makes-composite coated slow-released nitrogenous fertilizer of attapulgite is 31.42%.
According to " slow release fertilizer " national standard (GB/T 23348-2009), slow release fertilizer will soak 24 hour initial stage nutrient release rate and accumulate the nutrient release rate less than 80% less than 15%, 28 day in 25 ℃ of hydrostatic.
The contrast of table 3 product index
By table 3 as seen, product of the present invention meets national standard.
Claims (3)
1. the composite coated slow-released nitrogenous fertilizer of benzene emulsion-paraffin-attapulgite is characterized in that forming the internal layer coating in urea surface with benzene emulsion and attapulgite clay powder, forms outer coating on the surface of described internal layer coating with paraffin, and the consumption of each material is:
Nitrogenous mass percent for＞46.4%, grain diameter is the urea 100g of 3-4mm;
Second-order transition temperature is 55 ℃ benzene emulsion 40-60mL;
Industrial paraffin 20-30g;
Grain diameter is 200-325 purpose attapulgite clay powder 4-6g.
2. the preparation method of the described benzene emulsion-paraffin of claim 1-composite coated slow-released nitrogenous fertilizer of attapulgite is characterized in that finishing through twice coating the preparation of benzene emulsion-paraffin-composite coated slow-released nitrogenous fertilizer of attapulgite;
Coating for the first time: use benzene emulsion as coating agent, attapulgite clay powder as the anti-caking sustained release dosage; The urea granules that has sprayed benzene emulsion is wrapped up, dries with the attapulgite clay powder;
Coating for the second time: after will heating paraffin fusion, be sprayed on the product surface of coating gained for the first time as additive.
3. preparation method according to claim 2 is characterized in that:
Described first time coating: it is that 60r/min, preheating temperature are 50-70 ℃ that dressing machine rotating speed is set; In dressing machine rotary drum, drop into the urea preheating after 10 minutes, use spray gun in rotary drum, to spray into benzene emulsion, simultaneously in dressing machine rotary drum, drop into concave and convex rod stone powder, after having sprayed benzene emulsion, the dressing organizational security is held rotating speed, keeps Heating temperature, discharging after 5 minutes, described discharging is carried out drying with 50 ℃, gets siccative;
Described second time coating: coating gained siccative drops into the dressing machine again for the first time, it is that 50r/min, Heating temperature are 60-80 ℃ that dressing machine rotating speed is set, the use spray gun sprays into the paraffin through heating and melting in rotary drum, after having sprayed paraffin, close electric furnace, the dressing organizational security is held rotating speed, and discharging after 10 minutes gets the composite coated slow-released nitrogenous fertilizer of benzene emulsion-paraffin-attapulgite.
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| CN 201010523994 CN102020510B (en) | 2010-10-27 | 2010-10-27 | Styrene acrylic emulsion-paraffin-attapulgite composite envelope slow-release nitrogen fertilizer and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102992893A (en) * | 2012-11-13 | 2013-03-27 | 肥西县金牛蚕桑农民专业合作社 | Modified styrene-acrylic emulsion-containing mulberry fertilizer and preparation method thereof |
| CN106673830A (en) * | 2016-12-27 | 2017-05-17 | 盐城工学院 | Three-layer enveloping type high-water-absorption slow release fertilizer and preparation method thereof |
| CN108752087A (en) * | 2018-05-16 | 2018-11-06 | 芜湖市创源新材料有限公司 | A kind of preparation method of the coated slow-release multielement soil conditioner of the lime-ash containing activated biomass |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1654439A (en) * | 2005-01-26 | 2005-08-17 | 中国农业科学院土壤肥料研究所 | Method for producing mixed high-concentration slow-release fertilizer |
| CN101531553A (en) * | 2009-03-25 | 2009-09-16 | 吉林省嘉鹏巨森肥业有限公司 | Slow controlled release diatomite fertilizer |
| CN101798253A (en) * | 2010-04-26 | 2010-08-11 | 张夫道 | Method for preparing water-soluble phenolic aldehyde and hydrocinnamic mixture urea coated slow release formulation |
-
2010
- 2010-10-27 CN CN 201010523994 patent/CN102020510B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1654439A (en) * | 2005-01-26 | 2005-08-17 | 中国农业科学院土壤肥料研究所 | Method for producing mixed high-concentration slow-release fertilizer |
| CN101531553A (en) * | 2009-03-25 | 2009-09-16 | 吉林省嘉鹏巨森肥业有限公司 | Slow controlled release diatomite fertilizer |
| CN101798253A (en) * | 2010-04-26 | 2010-08-11 | 张夫道 | Method for preparing water-soluble phenolic aldehyde and hydrocinnamic mixture urea coated slow release formulation |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102992893A (en) * | 2012-11-13 | 2013-03-27 | 肥西县金牛蚕桑农民专业合作社 | Modified styrene-acrylic emulsion-containing mulberry fertilizer and preparation method thereof |
| CN102992893B (en) * | 2012-11-13 | 2014-07-30 | 肥西县金牛蚕桑农民专业合作社 | Modified styrene-acrylic emulsion-containing mulberry fertilizer and preparation method thereof |
| CN106673830A (en) * | 2016-12-27 | 2017-05-17 | 盐城工学院 | Three-layer enveloping type high-water-absorption slow release fertilizer and preparation method thereof |
| CN108752087A (en) * | 2018-05-16 | 2018-11-06 | 芜湖市创源新材料有限公司 | A kind of preparation method of the coated slow-release multielement soil conditioner of the lime-ash containing activated biomass |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102020510B (en) | 2013-01-09 |
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