CN102964186B - Urea-coated composite emulsion and preparation method and application thereof - Google Patents
Urea-coated composite emulsion and preparation method and application thereof Download PDFInfo
- Publication number
- CN102964186B CN102964186B CN201210447434.7A CN201210447434A CN102964186B CN 102964186 B CN102964186 B CN 102964186B CN 201210447434 A CN201210447434 A CN 201210447434A CN 102964186 B CN102964186 B CN 102964186B
- Authority
- CN
- China
- Prior art keywords
- urea
- emulsion
- coated composite
- composite emulsion
- weight part
- 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.)
- Expired - Fee Related
Links
Landscapes
- Fertilizers (AREA)
Abstract
The invention relates to urea-coated composite emulsion and a preparation method and application thereof. The urea-coated composite emulsion consists of waterborne polyurethane emulsion, styrene-acrylic emulsion, nonionic surfactant and the like, or consists of waterborne polyurethane emulsion, styrene-acrylic emulsion, nonionic surfactant, organic silicon emulsion and the like. The urea-coated composite emulsion provided by the invention delays quick release of fertilizer, obviously increases the release time, and can be matched with the nutrient intake of plants particularly by ternary blending. The coated composite emulsion provided by the invention can be used for coating any water-soluble fertilizer and has very broad application prospect.
Description
[technical field]
The invention belongs to chemical fertilizer technical field.More specifically, the present invention relates to a kind of urea coated composite emulsion, also relate to the preparation method of described urea coated composite emulsion, also relate to the purposes of described urea coated composite emulsion.
[background technology]
Coated release-controlled chemical fertilizer can effectively be controlled the rate of release of nutrient, meets plant and absorbs demand, improves plant recovery of nutrient more than 20%, is the important technical that solves agricultural high-effiency clean utilization chemical fertilizer.At present, coated fertilizer mainly contains polyolefine, urethane and polymer emulsion etc.The coated release-controlled chemical fertilizer of preparing with polymer emulsion, its release profiles is " S " type, good with plant nutrient absorbing rule matching, and emulsion be take water as dispersion medium, be a kind of clean capsule for controlled release fertilizer agent, therefore, research and development emulsion coating fertilizer has important using value.
People (US, 005089041 such as Thompson, Tsunehisa and Tzika; US, 005186732; JP, 03275583; Tzika M, 2003) using the emulsions such as polyvinylidene dichloride is main coated fertilizer, prepares polymer emulsion coated fertilizer, and is subject to extensive concern.Within 1992, Japanese Asahi Chemical Industry Co., Ltd is at its patent (Tsunehisa S, 1992) in, introduce the function monomer copolymerization emulsions such as use vinylbenzene (St), divinyl (BD), butyl acrylate (BA), N hydroxymethyl acrylamide, vinylformic acid, as coated fertilizer, made coated fertilizer; The people such as Donida (Donida MW, 2002) be take acrylic ester emulsion as coated fertilizer, and polyoxyethylene glycol is that softening agent, talcum powder are that glidant, titanium dioxide are that tinting material is prepared coated fertilizer; Korea S's high-tech research (Savant N, 1983) is used polyacrylic polymer emulsion to prepare coated fertilizer.CN 101244966A discloses the high molecular weight water soluble polymer emulsion of being made by Mierocrystalline cellulose, polyvinyl alcohol, polyurethane prepolymer, linking agent, emulsifying agent, initiator, plant-growth regulator and deionized water, and uses this emulsion to prepare automatic control slow release fertilizer.CN 102020510A discloses a kind of with benzene emulsion and concave and convex rod stone powder formation internal layer coating, the slow-release nitrogen fertilizer of the outer coating forming with paraffin on the surface of described internal layer coating.The people such as Yao person of outstanding talent (Yao person of outstanding talent, 2005) have carried out using the research of acrylic acid polymer emulsion coated fertilizer.
But, the character of polymer emulsion synthon self has determined that some common polymer emulsions, directly as there being the problems such as cold short hot sticky, water tolerance and structural stability be undesirable after coating agent, cause such polymer coating controlled release fertilizer fertilizer releasing period not long.The emulsion film-coated controlled release fertilizer fertilizer releasing period of existing bibliographical information is generally in 1 month.Cause the poor reason of emulsion film-coated controlled release fertilizer nutrient release performance except the intensity of room temperature film-forming, water tolerance and the polymkeric substance of polymer emulsion itself, also closely related with coating process condition and measure of control.
In order to improve the performance of polymer emulsion, it is conventional method that the polymer emulsion that employing has a different performance carries out blending and modifying, the present invention utilizes the method that adopts aqueous polyurethane and benzene emulsion blend, prepare coating agent, and invented the processing method of using this bag Membranous preparation film-coated controlled release fertilizer.
[summary of the invention]
[technical problem that will solve]
The object of this invention is to provide a kind of urea coated composite emulsion.
Another object of the present invention is to provide the preparation method of described urea coated composite emulsion.
Another object of the present invention is to provide the purposes of described urea coated composite emulsion.
[technical scheme]
The present invention is achieved through the following technical solutions.
The present invention relates to a kind of urea coated composite emulsion.
This urea coated composite emulsion composed as follows, in weight part:
The activation temperature of described aqueous polyurethane emulsion is 40 ~ 60 ℃;
The glass transition temperature of described benzene emulsion is 20 ~ 25 ℃, and minimum film-forming temperature is 16 ~ 21 ℃.
Aqueous polyurethane emulsion is to using the new polyurethane emulsion of water to replace organic solvent as dispersion medium.Aqueous polyurethane emulsion be take water as solvent, has the advantages such as pollution-free, safe and reliable, consistency is good.In the present invention, its activation temperature is that the aqueous polyurethane emulsion of 40 ~ 60 ℃ is all operable, they are all product solds in the market, the aqueous polyurethane that for example Beyer Co., Ltd sells with trade(brand)name DispercollU54, its solids content is 50 % by weight, viscosity 40-400mPa.s, activation temperature 45-55 ℃.
Benzene emulsion, cinnamic acrylic ester emulsion, is obtained through emulsion copolymerization by vinylbenzene and acrylate monomer.It is milky white liquid, 14-25 ℃ of its second-order transition temperature, solids content 40 ~ 50 % by weight, and viscosity 80 ~ 2000mPas, level of residual monomers is less than 0.5 % by weight, pH value 8 ~ 9.Benzene emulsion sticking power is good, and its glued membrane has transparent, water-fast, oil resistant, the feature such as heat-resisting, ageing-resistant performance is good.20 ~ 25 ℃ of its glass transition temperatures are all operable with the benzene emulsion of 16 ~ 21 ℃ of minimum film-forming temperatures in the present invention, they are all product solds in the market, the benzene emulsion that for example Rhom and Hass sells with trade(brand)name AS-2010, its solids content 49 % by weight, 21 ℃ of glass transition temperatures, 20 ℃ of minimum film-forming temperatures.
Deionized water refers to has removed the pure water being after ionic species impurity, is mainly the pure water that adopts ion exchange resin treatment method or adopt RO reverse osmosis method to obtain, and is product sold in the market.
Polyoxyethylenated alcohol sodium sulfate (AES) or alkyl polyoxyethylene ether (paregal O) are nonionogenic tensides, are product sold, for example product of traditional Chinese medicines group sale in the market.
In the present invention, when aqueous polyurethane emulsion is 15 ~ 25 weight part, if when benzene emulsion is less than 50 weight part, can greatly reduce the snappiness of rete; When if benzene emulsion is greater than 70 weight part, can greatly improve the wetting ability of rete; Therefore,, when aqueous polyurethane emulsion is 15 ~ 25 weight part, benzene emulsion is that 50 ~ 70 weight parts are suitable.Similarly, when aqueous polyurethane emulsion is 15 ~ 25 weight part, if when deionized water is less than 14 weight part, can cause because solid holdup is too high easily occurring that rete chaps in film process; When if deionized water is greater than 24 weight part, can increase because blending emulsion solid holdup is too low dehydration load; Therefore,, when aqueous polyurethane emulsion is 15 ~ 25 weight part, deionized water is that 14 ~ 24 weight parts are suitable.When aqueous polyurethane emulsion is 15 ~ 25 weight part, if when its nonionogenic tenside is less than 0.8 weight part, can cause emulsion blending inhomogeneous; When if nonionogenic tenside is greater than 1.2 weight part, can affect film process because of the existence of tensio-active agent; Therefore,, when aqueous polyurethane emulsion is 15 ~ 25 weight part, nonionogenic tenside is that 0.8 ~ 1.2 weight part is suitable.
Preferably, described urea coated composite emulsion composed as follows, in weight part:
More preferably, described urea coated composite emulsion composed as follows, in weight part:
The invention still further relates to the preparation method of described urea coated composite emulsion.
This urea coated composite emulsion preparation method's step is as follows:
First 14 ~ 24 parts by weight of deionized water are put in container, with strong aqua, its pH value are adjusted to 7.8 ~ 8.2; Then use high-shearing dispersion emulsifying machine, under the condition of rotating speed 480 ~ 520rpm, sequentially add respectively 50 ~ 70 weight part benzene emulsions, 0.8 ~ 1.2 weight part polyoxyethylenated alcohol sodium sulfate or alkyl polyoxyethylene ether and 15 ~ 25 weight part aqueous polyurethane emulsions, then under the condition of rotating speed 15000 ~ 20000rpm, stir 8 ~ 10min, so obtain described urea coated composite emulsion.
The high-shearing dispersion emulsifying machine that the present invention uses is product sold in the market, the high-shearing dispersion emulsifying machine that for example Shanghai Frock Fluid Machinery Manufacture Co., Ltd. sells with trade(brand)name FM200, and its rotating speed 300 ~ 23000rpm, stepless change is controlled.
The invention still further relates to another kind of for urea coated urea coated composite emulsion.
This urea coated composite emulsion composed as follows, in weight part:
The activation temperature of described aqueous polyurethane emulsion is 40 ~ 60 ℃;
The glass transition temperature of described benzene emulsion is 20 ~ 25 ℃, and minimum film-forming temperature is 16 ~ 21 ℃;
Tensile strength >=0.5 MPa of described organic silicon emulsion water milk type coating, elongation at break >=80%.
Described aqueous polyurethane emulsion, benzene emulsion, deionized water, polyoxyethylenated alcohol sodium sulfate or alkyl polyoxyethylene ether as previously described, do not repeat them here.
The oil-contg of silicone oil is generally 20 ~ 30 % by weight, and pH 6 ~ 8.Its centrifugal stability under 3000r/min condition reaches 15 ~ 30min.Its surface tension is little, heat-resisting, anti-oxidant.It is as the anion surfactant of sodium laurylsulfonate and so on or under as the existence of cetyl trimethylammonium bromide and so on cats product and catalyzer, carries out letex polymerization obtain by octamethylcyclotetrasiloxane.It is product sold in the market, the organic silicon emulsion that for example Beijing Proview latex company limited sells with trade(brand)name POLYWELL PE-2199.
When aqueous polyurethane emulsion is 15 ~ 25 weight part, if when organic silicon emulsion is less than 2 weight part, can reduce the wetting ability of rete; When if organic silicon emulsion is greater than 8 weight part, thereby can cause the crisp hard rete mechanical stability that reduces of rete; Therefore,, when aqueous polyurethane emulsion is 15 ~ 25 weight part, organic silicon emulsion is that 2 ~ 8 weight parts are suitable.Aqueous polyurethane emulsion, benzene emulsion, deionized water and nonionogenic tenside as previously described, do not repeat them here.
Preferably, described urea coated composite emulsion composed as follows, in weight part:
More preferably, described urea coated composite emulsion composed as follows, in weight part:
The invention still further relates to the preparation method of above-mentioned urea coated composite emulsion.
This urea coated composite emulsion preparation method's step is as follows:
First 14 ~ 24 parts by weight of deionized water are put in container, with strong aqua, its pH value are adjusted to 7.8 ~ 8.2; Then use high-shearing dispersion emulsifying machine, under the condition of rotating speed 480 ~ 520rpm, sequentially add respectively 50 ~ 70 weight part benzene emulsions, 0.8 ~ 1.2 weight part polyoxyethylenated alcohol sodium sulfate or alkyl polyoxyethylene ether, 15 ~ 25 weight part aqueous polyurethane emulsions and 2 ~ 8 weight part organic silicon emulsions, then under the condition of rotating speed 15000 ~ 20000rpm, stir 8 ~ 10min, so obtain described urea coated composite emulsion.
The high-shearing dispersion emulsifying machine using as previously described, does not repeat them here.
The invention still further relates to the method for using above-mentioned urea coated composite emulsion to prepare film coated urea fertilizer.This film coated urea fertilizer preparation method's step is as follows:
Concrete technology flow process is referring to accompanying drawing 1,1-urea preheating rotary drum wherein, 2-air compressor, 3-Root's blower, 4-gas buffer tank, 5-well heater, 6-interchanger, 7-fluidized-bed, 8-coating liquid storage tank, 9-peristaltic pump, 10-thermal treatment rotary drum.
A, thermal pretreatment
Particle diameter 2 ~ 4mm urea granules is put in preheating rotary drum, under the condition of 48 ~ 52 ℃ of temperature, carries out thermal pretreatment 4 ~ 6min;
Described preheating rotary drum 1 be a kind of in fertilizer industry technical field normally used equipment.
B, fluidisation
Open blower fan and the well heater of fluidized bed plant, regulate fluidization gas and temperature, make fluidized-bed in running order, then add the preheating urea granules of steps A, make it in turbulence fluidized state.
Described blower fan is for example Root's blower 3.
Particularly, opening control system power supply, presses Root's blower 3 start buttons and electric heater 5 buttons, and regulates fluidization gas, makes gas enter fluidized-bed 7 through surge tank 4 and electric heater 5, makes fluidized-bed 7 in running order.
Described fluidized-bed 7 be a kind of in fertilizer industry technical field normally used equipment, it generally includes the uniform chamber of fluidized gas, gas distribution grid, bottom and falls vertebra, cylinder-shaped body (typically having a diameter from 20 ~ 30cm), expanding reach and six integral parts of atomizing nozzle.
C, spraying
Use peristaltic pump to pass through shower nozzle, compressed gas pressure be 22 ~ 28 ℃ of 0.1 ~ 0.3MP, temperature with the condition of speed 10 ~ 30ml/min under the urea coated composite emulsion in described in weight of urea 20 ~ 30% is sprayed on the described urea granules surface in turbulence fluidized state, form a kind of coated carbamide.
Particularly, use peristaltic pump 9 that the urea coated composite emulsion of the present invention being contained in coating liquid storage tank 8 is flowed to shower nozzle, control gaseous tension and the flow of air compressor 2 simultaneously, pressurized gas is after interchanger 6 constant temperature are processed, by the urea coated composite emulsion atomization in shower nozzle, spray, be coated in fluidized-bed 7 on the granular urea surface in turbulence state.
D, anti-stick are processed
The whiteruss spraying in the coated carbamide obtaining toward step C with coated carbamide weighing scale 0.5 ~ 1% carries out anti-stick processing 2.0-5.0 minute, then be positioned in the thermal treatment rotary drum of 75 ~ 85 ℃ of temperature, interpolation is with the paraffin of coated carbamide weighing scale 0.5 ~ 1%, thermal treatment 15 ~ 25min at 75 ~ 85 ℃ of temperature again, then be cooled to temperature 50 C, obtain described film coated urea fertilizer.
Described thermal treatment rotary drum be a kind of in fertilizer industry technical field normally used equipment.
According to the present invention, described urea replaces with a kind of water soluble fertilizer that is selected from bicarbonate of ammonia, volatile salt, ammonium sulfate, ammonium chloride, ammonium nitrate, ammonium hydrogen phosphate, primary ammonium phosphate, potassium sulfate or Repone K.
Particularly, except urea is carried out coating, adopt the inventive method to carry out coating to above-mentioned water soluble fertilizer, thereby can improve utilization rate of fertilizer, reduce fertilizer loss, protected environment.
Feature of the present invention is to utilize and adopts aqueous polyurethane, benzene emulsion and organic silicon emulsion blend to prepare a kind of coating agent of water soluble fertilizer, and uses this coating agent to prepare film-coated controlled release fertilizer.Aqueous polyurethane and benzene emulsion binary blending emulsion have delayed the slope in quick release stage, and the release period of film-coated controlled release fertilizer is significantly increased, and are to use merely 1.5 times of benzene emulsion coating.And use organic silicon emulsion, aqueous polyurethane and benzene emulsion tertiary blending emulsion as the coated fertilizer of bag Membranous preparation, obviously extended quick release initial time, make it under the water soaking condition of 15 days, discharge 10% left and right, this closes on the phase with seed nutrient, and (approximately 20 days) interior nutrition absorption amount is seldom mutually suitable, the slope in its quick release stage is also effectively controlled simultaneously, and release period extends.Adopt polymer emulsion blending and modifying, can improve the controlled release properties that becomes coated fertilizer, especially adopt tertiary blending to can be good at absorbing and matching with plant nutrient.
Urea coated composite emulsion of the present invention can carry out coating for any water soluble fertilizer.
Coated fertilizer of the present invention can be used as base manure, the use of topdressing.
Coated fertilizer usage quantity of the present invention need be determined according to factors such as soil regime, crop varieties, crop growth phase, crop alimentary situations.
Except as otherwise noted, " % " involved in the present invention is all weight percentage.
[beneficial effect]
Urea coated composite emulsion of the present invention has delayed the slope that fertilizer discharges the stage fast, and the release period of film-coated controlled release fertilizer significantly increased, and is to use merely 1.5 times of benzene emulsion coating.And use organic silicon emulsion, aqueous polyurethane and benzene emulsion tertiary blending emulsion as the coated fertilizer of bag Membranous preparation, obviously extended quick release initial time, make it under the water soaking condition of 15 days, discharge 10% left and right, this closes on the phase with seed nutrient, and (approximately 20 days) interior nutrition absorption amount is seldom mutually suitable, the slope in its quick release stage is also effectively controlled simultaneously, and release period extends.Adopt polymer emulsion blending and modifying, can improve the controlled release properties that becomes coated fertilizer, especially adopt tertiary blending to can be good at absorbing and matching with plant nutrient.Coating composite emulsion of the present invention can carry out coating for any water soluble fertilizer, has application prospect very widely.
[accompanying drawing explanation]
Fig. 1 is the process flow sheet that bed spray is prepared composite emulsion coated carbamide
1-urea preheating rotary drum, 2-air compressor, 3-Root's blower, 4-gas buffer tank, 5-well heater, 6-interchanger, 7-fluidized-bed, 8-coating liquid storage tank, 9-peristaltic pump, 10-thermal treatment rotary drum.
The nutrient of the different bag of Fig. 2 Membranous preparation coated fertilizer discharges summation curve.
[embodiment]
By following embodiment, can understand better the present invention.
Embodiment 1: the preparation of the urea coated composite emulsion of the present invention
The implementation step of this embodiment is as follows:
First 14 parts by weight of deionized water are put in container, with strong aqua, its pH value are adjusted to 7.8; Then the high-shearing dispersion emulsifying machine that uses Shanghai Frock Fluid Machinery Manufacture Co., Ltd. to sell with trade(brand)name FM200, the benzene emulsion that sequentially adds respectively 50 weight parts to be sold with trade(brand)name AS-2010 by Rhom and Hass under the condition of rotating speed 480rpm, 21 ℃ of its solids content 49 % by weight, glass transition temperatures; The polyoxyethylenated alcohol sodium sulfate of 0.8 weight part traditional Chinese medicines group sale; The aqueous polyurethane emulsion that 15 weight parts are sold with trade(brand)name Dispercoll U54 by Beyer Co., Ltd, its solids content 50 % by weight, viscosity 40-400mPa.s, activation temperature 45-55 ℃; Then under the condition of rotating speed 15000rpm, stir 8min, so obtain described urea coated composite emulsion.
Embodiment 2: the preparation of the urea coated composite emulsion of the present invention
The implementation step of this embodiment is as follows:
According to the embodiment identical with embodiment 1, carry out, just first 24 parts by weight of deionized water are put in container, with strong aqua, its pH value is adjusted to 8.2; Then use described high-shearing dispersion emulsifying machine, under the condition of rotating speed 520rpm, sequentially add respectively the benzene emulsion described in 70 weight parts; Alkyl polyoxyethylene ether described in 1.2 weight parts; Aqueous polyurethane emulsion described in 25 weight parts; Then under the condition of rotating speed 20000rpm, stir 10min, so obtain described urea coated composite emulsion.
Embodiment 3: the preparation of the urea coated composite emulsion of the present invention
The implementation step of this embodiment is as follows:
According to the embodiment identical with embodiment 1, carry out, just first 18 parts by weight of deionized water are put in container, with strong aqua, its pH value is adjusted to 8.0; Then use described high-shearing dispersion emulsifying machine, under the condition of rotating speed 500rpm, sequentially add respectively the benzene emulsion described in 56 weight parts; Polyoxyethylenated alcohol sodium sulfate described in 0.9 weight part; Aqueous polyurethane emulsion described in 18 weight parts; Then under the condition of rotating speed 15000 ~ 2000018001600rpm, stir 8 ~ 10910min, so obtain described urea coated composite emulsion.
Embodiment 4: the preparation of the urea coated composite emulsion of the present invention
The implementation step of this embodiment is as follows:
According to the embodiment identical with embodiment 1, carry out, just first 20 parts by weight of deionized water are put in container, with strong aqua, its pH value is adjusted to 8.0; Then use described high-shearing dispersion emulsifying machine, under the condition of rotating speed 510rpm, sequentially add respectively the benzene emulsion described in 62 weight parts; Alkyl polyoxyethylene ether described in 1.0 weight parts; Aqueous polyurethane emulsion described in 22 weight parts; Then under the condition of rotating speed 1600rpm, stir 10min, so obtain described urea coated composite emulsion.
Embodiment 5: the preparation of the urea coated composite emulsion of the present invention
The implementation step of this embodiment is as follows:
First 14 parts by weight of deionized water are put in container, with strong aqua, its pH value are adjusted to 7.8; Then the high-shearing dispersion emulsifying machine that uses Shanghai Frock Fluid Machinery Manufacture Co., Ltd. to sell with trade(brand)name FM200, the benzene emulsion that sequentially adds respectively 50 weight parts to be sold with trade(brand)name AS-2010 by Rhom and Hass under the condition of rotating speed 480rpm, 21 ℃ of its solids content 49 % by weight, glass transition temperatures; The polyoxyethylenated alcohol sodium sulfate of 0.8 weight part traditional Chinese medicines group sale; The aqueous polyurethane emulsion that 15 weight parts are sold with trade(brand)name Dispercoll U54 by Beyer Co., Ltd, its solids content 50 % by weight, viscosity 40-400mPa.s, activation temperature 45-55 ℃; The organic silicon emulsion that 2 weight parts are sold with trade(brand)name POLYWELL PE-2199 by Beijing Proview latex company limited then stirs 8min under the condition of rotating speed 15000rpm, so obtain described urea coated composite emulsion.
Embodiment 6: the preparation of the urea coated composite emulsion of the present invention
The implementation step of this embodiment is as follows:
According to the embodiment identical with embodiment 5, carry out, just first 24 parts by weight of deionized water are put in container, with strong aqua, its pH value is adjusted to 8.2; Then use described high-shearing dispersion emulsifying machine, under the condition of rotating speed 520rpm, sequentially add respectively the benzene emulsion described in 70 weight parts; Alkyl polyoxyethylene ether described in 1.2 weight parts; Aqueous polyurethane emulsion described in 25 weight parts; Organic silicon emulsion described in 8 weight parts then stirs 10min under the condition of rotating speed 20000rpm, so obtain described urea coated composite emulsion.
Embodiment 7: the preparation of the urea coated composite emulsion of the present invention
The implementation step of this embodiment is as follows:
According to the embodiment identical with embodiment 5, carry out, just first 16 parts by weight of deionized water are put in container, with strong aqua, its pH value is adjusted to 8.0; Then use described high-shearing dispersion emulsifying machine, under the condition of rotating speed 500rpm, sequentially add respectively the benzene emulsion described in 54 weight parts; Polyoxyethylenated alcohol sodium sulfate described in 0.9 weight part; Aqueous polyurethane emulsion described in 17 weight parts; Organic silicon emulsion described in 4 weight parts then stirs 9min under the condition of rotating speed 1800rpm, so obtain described urea coated composite emulsion.
Embodiment 8: the preparation of the urea coated composite emulsion of the present invention
The implementation step of this embodiment is as follows:
According to the embodiment identical with embodiment 5, carry out, just first 22 parts by weight of deionized water are put in container, with strong aqua, its pH value is adjusted to 8.0; Then use described high-shearing dispersion emulsifying machine, under the condition of rotating speed 510rpm, sequentially add respectively the benzene emulsion described in 65 weight parts; Alkyl polyoxyethylene ether described in 1.0 weight parts; Aqueous polyurethane emulsion described in 24 weight parts; Organic silicon emulsion described in 6 weight parts then stirs 10min under the condition of rotating speed 1600rpm, so obtain described urea coated composite emulsion.
Embodiment 9: use coating composite emulsion of the present invention to prepare film coated urea fertilizer
The implementation step of this embodiment is as follows:
A, thermal pretreatment
Particle diameter 2 ~ 4mm urea granules that Jiang You Shandong Ruixing Chemical Co. Ltd. produces is put in preheating rotary drum 1, under the condition of 52 ℃ of temperature, carries out thermal pretreatment 4min;
B, fluidisation
Open blower fan and the well heater of fluidized-bed 7 equipment, regulate fluidization gas and temperature, make fluidized-bed in running order, then add the preheating urea granules of steps A, make it in turbulence fluidized state;
C, spraying
Use peristaltic pump 9 to pass through shower nozzle, compressed gas pressure be 28 ℃ of 0.1MP, temperature with the condition of speed 30ml/min under the urea coated composite emulsion in weight of urea 20% embodiment 1 preparation is sprayed on the described urea granules surface in turbulence fluidized state, form a kind of coated carbamide;
D, anti-stick are processed
The whiteruss spraying in the coated carbamide obtaining toward step C with coated carbamide weighing scale 0.5% carries out anti-stick processing 2.0 minutes, then be positioned in the dryer rotary drum of 85 ℃ of temperature, interpolation is with the paraffin of coated carbamide weighing scale 1.0%, thermal treatment 15min at 85 ℃ of temperature again, then be cooled to temperature 50 C, obtain described film coated urea fertilizer.
Embodiment 10: use coating composite emulsion of the present invention to prepare film coated urea fertilizer
The implementation step of this embodiment is as follows:
A, thermal pretreatment
Particle diameter 2 ~ 4mm urea granules that Jiang You Shandong Ruixing Chemical Co. Ltd. produces is put in preheating rotary drum 1, under the condition of 48 ℃ of temperature, carries out thermal pretreatment 6min;
B, fluidisation
Open blower fan and the well heater of fluidized bed plant 7, regulate fluidization gas and temperature, make fluidized-bed in running order, then add the preheating urea granules of steps A, make it in turbulence fluidized state;
C, spraying
Use peristaltic pump 9 to pass through shower nozzle, compressed gas pressure be 22 ℃ of 0.3MP, temperature with the condition of speed 10ml/min under the urea coated composite emulsion in weight of urea 30% embodiment 5 preparations is sprayed on the described urea granules surface in turbulence fluidized state, form a kind of coated carbamide;
D, anti-stick are processed
The whiteruss spraying in the coated carbamide obtaining toward step C with coated carbamide weighing scale 1.0% carries out anti-stick processing 5.0 minutes, then be positioned in the dryer rotary drum of 75 ℃ of temperature, interpolation is with the paraffin of coated carbamide weighing scale 0.5%, thermal treatment 25min at 75 ℃ of temperature again, then be cooled to temperature 50 C, obtain described film coated urea fertilizer.
Test example: the mensuration of composite coated controlled-release fertilizer nutrient release performance
Adopt water-extraction method to measure the nutrient release performance of the film-coated controlled release fertilizer of different coating agent processing, three kinds of prepared coated fertilizer nutrients of different coating agent discharge cumulative percentage in Table 1.
Table 1: the nutrient of different bag Membranous preparation coated fertilizers discharges preparation
As shown in Table 1, use separately film-coated controlled release fertilizer prepared by benzene emulsion under water soaking condition, exist after 10 days and start to have a quick release stage, its release profiles (seeing accompanying drawing 2) to show as typical " S " type.
The binary blending emulsion of use aqueous polyurethane emulsion and benzene emulsion has delayed the slope in quick release stage, and the release period of film-coated controlled release fertilizer is significantly increased, and is approximately 1.5 times that use merely benzene emulsion to process.And use the tertiary blending emulsion of organic silicon emulsion, aqueous polyurethane emulsion and benzene emulsion as the coated fertilizer of bag Membranous preparation, obviously extended quick release initial time, make it under the water soaking condition of 15 days, discharge 10% left and right, this closes on the phase with seed nutrient, and (approximately 20 days) interior nutrition absorption amount is seldom mutually suitable, the slope in its quick release stage is also effectively controlled simultaneously, and release period extends.Adopt polymer emulsion blending and modifying, can improve the controlled release properties that becomes coated fertilizer, especially adopt tertiary blending to can be good at absorbing and matching with plant nutrient.
Claims (8)
1. a urea coated composite emulsion, is characterized in that the composed as follows of this urea coated composite emulsion, in weight part:
The activation temperature of described aqueous polyurethane emulsion is 40～60 ℃;
The glass transition temperature of described benzene emulsion is 20～25 ℃, and minimum film-forming temperature is 16～21 ℃;
Preparation method's step of described urea coated composite emulsion is as follows:
First 14～24 parts by weight of deionized water are put in container, with strong aqua, its pH value are adjusted to 7.8～8.2; Then use high-shearing dispersion emulsifying machine, under the condition of rotating speed 480～520rpm, sequentially add respectively 50～70 weight part benzene emulsions, 0.8～1.2 weight part polyoxyethylenated alcohol sodium sulfate or alkyl polyoxyethylene ether and 15～25 weight part aqueous polyurethane emulsions, then under the condition of rotating speed 15000～20000rpm, stir 8～10min, so obtain described urea coated composite emulsion.
2. urea coated composite emulsion according to claim 1, is characterized in that the composed as follows of this urea coated composite emulsion, in weight part:
3. urea coated composite emulsion according to claim 1, is characterized in that the composed as follows of this urea coated composite emulsion, in weight part:
4. for a urea coated urea coated composite emulsion, it is characterized in that the composed as follows of this urea coated composite emulsion, in weight part:
The activation temperature of described aqueous polyurethane emulsion is 40～60 ℃;
The glass transition temperature of described benzene emulsion is 20～25 ℃, and minimum film-forming temperature is 16～21 ℃;
Tensile strength >=0.5 MPa of described organic silicon emulsion water milk type coating, elongation at break >=80%;
The preparation method of described urea coated composite emulsion is suddenly as follows:
First 14～24 parts by weight of deionized water are put in container, with strong aqua, its pH value are adjusted to 7.8～8.2; Then use high-shearing dispersion emulsifying machine, under the condition of rotating speed 480～520rpm, sequentially add respectively 50～70 weight part benzene emulsions, 0.8～1.2 weight part polyoxyethylenated alcohol sodium sulfate or alkyl polyoxyethylene ether, 15～25 weight part aqueous polyurethane emulsions and 2～8 weight part organic silicon emulsions, then under the condition of rotating speed 15000～20000rpm, stir 8～10min, so obtain described urea coated composite emulsion.
5. urea coated composite emulsion according to claim 4, is characterized in that the composed as follows of this urea coated composite emulsion, in weight part:
6. urea coated composite emulsion according to claim 4, is characterized in that the composed as follows of this urea coated composite emulsion, in weight part:
7. use the method for preparing film coated urea fertilizer according to the urea coated composite emulsion described in claim 1 or 6, it is characterized in that the step of the method is as follows:
A, thermal pretreatment
Particle diameter 2～4mm urea granules is put in preheating rotary drum, under the condition of 48～52 ℃ of temperature, carries out thermal pretreatment 4～6min;
B, fluidisation
Open blower fan and the well heater of fluidized bed plant, regulate fluidization gas and temperature, make fluidized-bed in running order, then add the preheating urea granules of steps A, make it in turbulence fluidized state;
C, spraying
Use peristaltic pump to pass through shower nozzle, compressed gas pressure be 22～28 ℃ of 0.1～0.3MP, temperature with the condition of speed 10～30ml/min under by being sprayed on according to the urea coated composite emulsion described in claim 1 or 6 in weight of urea 20～30% on the described urea granules surface in turbulence fluidized state, form a kind of coated carbamide;
D, anti-stick are processed
The whiteruss spraying in the coated carbamide obtaining toward step C with coated carbamide weighing scale 0.5～1% carries out anti-stick processing 2.0-5.0 minute, then be positioned in the dryer rotary drum of 75～85 ℃ of temperature, interpolation is with the paraffin of coated carbamide weighing scale 0.5～1%, thermal treatment 15～25min at 75～85 ℃ of temperature again, then be cooled to temperature 50 C, obtain described film coated urea fertilizer.
8. method according to claim 7, is characterized in that described urea replaces with a kind of water soluble fertilizer that is selected from bicarbonate of ammonia, volatile salt, ammonium sulfate, ammonium chloride, ammonium nitrate, ammonium hydrogen phosphate, primary ammonium phosphate, potassium sulfate or Repone K.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210447434.7A CN102964186B (en) | 2012-11-09 | 2012-11-09 | Urea-coated composite emulsion and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210447434.7A CN102964186B (en) | 2012-11-09 | 2012-11-09 | Urea-coated composite emulsion and preparation method and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102964186A CN102964186A (en) | 2013-03-13 |
| CN102964186B true CN102964186B (en) | 2014-11-26 |
Family
ID=47794657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210447434.7A Expired - Fee Related CN102964186B (en) | 2012-11-09 | 2012-11-09 | Urea-coated composite emulsion and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102964186B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9416064B2 (en) * | 2013-08-07 | 2016-08-16 | Chinese Academy of Agricultural Sciences Institute of Agricultural Resources and Regional Planning | Method for producing controlled-release fertilizer coated with polyurethane |
| CN104058820B (en) * | 2014-05-24 | 2016-04-13 | 蚌埠味多多学生营养餐有限公司 | A kind of slow-release compound fertilizer promoting soil fertility |
| CN104108991A (en) * | 2014-06-23 | 2014-10-22 | 合肥长润农业科技有限公司 | Catechol-containing polyurethane coated slow release compound fertilizer |
| CN105481559B (en) * | 2015-12-22 | 2018-12-21 | 河北百禾丰化肥有限公司 | It is a kind of using organosilicon oligomer as coating sustained release Eco-fertilizer preparation method |
| CN105646097A (en) * | 2016-03-10 | 2016-06-08 | 河南力浮科技有限公司 | Sustained-released nano humic acid chelated zinc fertilizer production method |
| 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 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1948241A (en) * | 2005-10-13 | 2007-04-18 | 南京理工大学 | Polymer composite coated slow release fertilizer |
| 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 |
| CN101244966A (en) * | 2008-03-24 | 2008-08-20 | 山东省农业科学院土壤肥料研究所 | Biological degradable multifunctional automatic control slow release fertilizer and manufacture method thereof |
| CN101348397A (en) * | 2007-08-15 | 2009-01-21 | 山东金正大生态工程股份有限公司 | Aqueous polymer coated controlled release fertilizer and preparation thereof |
| 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 |
| US20120227451A1 (en) * | 2008-07-16 | 2012-09-13 | Agrium Inc. | Controlled release fertilizer composition |
-
2012
- 2012-11-09 CN CN201210447434.7A patent/CN102964186B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1948241A (en) * | 2005-10-13 | 2007-04-18 | 南京理工大学 | Polymer composite coated slow release fertilizer |
| 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 |
| CN101348397A (en) * | 2007-08-15 | 2009-01-21 | 山东金正大生态工程股份有限公司 | Aqueous polymer coated controlled release fertilizer and preparation thereof |
| CN101244966A (en) * | 2008-03-24 | 2008-08-20 | 山东省农业科学院土壤肥料研究所 | Biological degradable multifunctional automatic control slow release fertilizer and manufacture method thereof |
| US20120227451A1 (en) * | 2008-07-16 | 2012-09-13 | Agrium Inc. | Controlled release fertilizer composition |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102964186A (en) | 2013-03-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102964186B (en) | Urea-coated composite emulsion and preparation method and application thereof | |
| CN101182269B (en) | Water polymer integument and method for preparing integument controlled-release fertilizer thereof | |
| Azeem et al. | Review on materials & methods to produce controlled release coated urea fertilizer | |
| Lubkowski et al. | Controlled release fertilizers | |
| CN102584496B (en) | Efficient slow-release urea and preparation method thereof | |
| CN104003807B (en) | A kind of double wrapped water-retaining type sustained release pesticide granules preparation and preparation method | |
| CN102584495B (en) | Slow-release urea containing gamma-polyglutamic acid and urease inhibitor and preparation method thereof | |
| CN108456121A (en) | A kind of nucleocapsid slow-release or control-release fertilizer and preparation method thereof | |
| CN110041136A (en) | Compound coating slow-release or control-release fertilizer of water retaining function type bio-based polyurethane and preparation method thereof | |
| CN104355874B (en) | A kind of aqueous-based polymers emulsion coating controlled-release fertilizer and preparation method thereof | |
| CN105294289A (en) | Dual-channel coated material regulated stress-resistant efficient slow-release fertilizer for paddy rice and preparation method thereof | |
| US20130340333A1 (en) | Product intended to be added to crop irrigation water | |
| CN106396939A (en) | Soil fertilizing improving agent for saline-alkali soil and preparation of improving agent | |
| CN108516899A (en) | A kind of functional form slow-release or control-release fertilizer core and preparation method thereof based on biological based binder | |
| CN102696578B (en) | Water-retention gel and water-retention gel powder for transplanting trees with bare roots and method for preparing same | |
| CN109851437A (en) | A kind of the water-retaining type release and release control fertilizer and its production method of biomass-based polymer capsule | |
| CN108083898A (en) | Soil conditioner, preparation method and applications | |
| CN105272602B (en) | Coated fertilizer and its preparation method and application is blended with lotus leaf powder in a kind of starch | |
| CN103058797B (en) | Production method of slow release fertilizer | |
| CN109678599A (en) | A kind of preparation and application of the biological intelligence slow-release or control-release fertilizer of soil improvement reparation | |
| CN109867563A (en) | A kind of sustained-controll-release fertiliser and preparation method thereof with water retaining function | |
| Pulat et al. | Smart fertilizers: preparation and characterization of gelatin-based hydrogels for controlled release of MAP and AN fertilizers | |
| Li et al. | Network interpenetrating slow-release nitrogen fertilizer based on carrageenan and urea: A new low-cost water and fertilizer regulation carrier | |
| CN108101628A (en) | The preparation process of three red sweet shaddock plantation soil amendment fertilizers | |
| CN107337562A (en) | A kind of method for activating lignite humic acid and preparing water-holding slow-release humic acid biological fertilizer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141126 Termination date: 20191109 |