CN100357229C - Multifunctional fertilizer and pesticide slow/controlled releasing agent and its prepn process - Google Patents
Multifunctional fertilizer and pesticide slow/controlled releasing agent and its prepn process Download PDFInfo
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- CN100357229C CN100357229C CNB2006100123609A CN200610012360A CN100357229C CN 100357229 C CN100357229 C CN 100357229C CN B2006100123609 A CNB2006100123609 A CN B2006100123609A CN 200610012360 A CN200610012360 A CN 200610012360A CN 100357229 C CN100357229 C CN 100357229C
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
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Abstract
The present invention discloses multifunction fertilizer, a preparation for slowing or controlling the release of pesticide and a preparation method thereof. The preparation for slowing or controlling release is prepared from the following main raw material by means of graft copolymerization according to dosage proportions: 200 to 300 ml of acrylic acid, 250 to 350 ml of alkaline solution with the concentration of 26%, 180 to 260 ml of acrylamide, 50 to 100g of corn powder, 30 to 60g of bentonite and 10 to 20g of magnesium carbonate. The preparation method comprises the following steps that acrylic acid is neutralized and pretreated by alkaline solution so as to obtain neutralized solution, graft copolymerization is carried out to the neutralized solution, acrylamide, corn powder, bentonite and magnesium carbonate under the existence of a catalyst and an activating agent, and the obtained copolymers are cooled, cut, dried and crushed so as to obtain the preparation for slowing or controlling release. With the advantages of environmental protection and convenient use, the preparation for slowing or controlling release is used for preparing fertilizer and pesticide for slowing or controlling release and has no influence on the quality and the performance of fertilizer and pesticide. The preparation for slowing or controlling release can perform the functions of fertilizer absorption, fertilizer retention, pesticide absorption, pesticide retention, water absorption and water retention, can realize the slow release of water, fertilizer, improve the utilization rate of fertilizer and prolong effects of fertilizer and pesticide.
Description
Technical field
The present invention relates to functional high polymer material field, specifically a kind of fertilizer, pesticide slow/controlled releasing agent and preparation method thereof.
Background technology
Comprehensive slow/controlled release material both domestic and external mainly contains the material that sulphur, paraffin, pitch, resin, interpolation mushroom inhibitor etc. are insoluble in water.Adopt sulphur that fertilizer is carried out dressing, its production process complexity, cost is higher.And apply this fertilizer for a long time, and can cause soil acidification, destroy Soil structure.Paraffin and pitch are water insoluble, and the fertilizer behind the parcel is difficult for discharging.Adopt the production cost of mushroom inhibitor very high.Adopt the resin dressing,, can cause secondary pollution soil because of the resin non-degradable.The slow release fertilizer that utilizes fused(calcium magnesium)phosphate parcel carbon ammonium to make, the nitrogen content of carbon ammonium own is low, and the nitrogen content behind the coating is lower.When running into drought and water shortage, the dressing of these fertilizer can't break, and can cause the fertilizer in the dressing to discharge, and does not have the due effect of fertilizer.And, when existing slow-release material is used to produce slow release fertilizer or sustained-release pesticides, needs to add bag and connect agent, change the production line of existing technology, strengthen plant investment, increase production cost.
The ZL0019689 patent disclosure a kind of by high amylopectin starch, vinylformic acid, acrylamide the water-absorbing resin that graft copolymerization makes takes place in the presence of initiator and linking agent.Its preparation technology is first with starch pasting, reacts under the protection of rare gas element, and add linking agent in reaction system.Its finished product only has absorbent function, function singleness, complicated process of preparation.This class water-absorbing resin after compound with fertilizer, agricultural chemicals etc., do not reach inhale fertile protect fertile, inhale the effect that medicine is protected medicine, can not satisfy the needs of agricultural and forestry production.The CN1509606 patent disclosure a kind of by in water-keeping material, adding the composite multi-functional nutrient slow-release formulation with function of water retention of making behind functional substance, organic raw material and the tethelin.This water-preserving nutritive sustained release dosage need bond together water-keeping material and functional substance with tackiness agent, and need be after fertilizer is made by technique for sticking water-keeping material and functional fertilizer be wrapped again and connect, therefore exist complicated process of preparation, production cost height, finished product to use inconvenient shortcoming.
Summary of the invention
Purpose of the present invention just provides a kind of environmental friendliness, fertilizer, pesticide slow/controlled releasing agent and preparation method thereof and application easy to use, before or after fertilizer, agricultural chemicals, biotechnological formulation are prepared into the finished product, slow/controlled releasing agent and fertilizer, biotechnological formulation and agricultural chemicals wrapped connect or mix, can play and inhale the fertile effect fertile, that the suction medicine is protected medicine, water-absorbing-retaining of protecting, make water, fertilizer, medicine realize slowly discharging.
Slow/controlled releasing agent of the present invention can be carried out graft copolymerization by usage ratio and got by following main raw material:
Vinylformic acid 200-300ml, alkali lye (is 26% in concentration) 250-350ml, acrylamide 180-260g, Semen Maydis powder 50-100g, wilkinite 30-60g, magnesiumcarbonate 10-20g.
Above-mentioned " main raw material " is meant that graft polymerization becomes the basic raw material of slow/controlled releasing agent of the present invention, certainly do not get rid of popular response auxiliary agent that other also can be arranged etc.
Slow/controlled releasing agent of the present invention is to carry out graft copolymerization with Semen Maydis powder as the natural polymer skeleton.Because Semen Maydis powder is than starch polyprotein matter and this two big grafting carrier (macromolecular scaffold) of Mierocrystalline cellulose, so its percentage of grafting is apparently higher than starch, and the copolymerization effect is obviously strengthened.And protein in the Semen Maydis powder and Mierocrystalline cellulose all are the agriculture and forestry plant necessary nutritive ingredients of growing, and have the effect that promotes plant-growth.With respect to being the sustained release dosage product of raw materials for production with the starch based product, use Semen Maydis powder also to have advantages such as raw material is easy to get, production cost is low.In addition, make raw material, not only can make the corn increment more than at least 15 times, for the coarse food grain deep processing opens a new road with Semen Maydis powder; And made slow/controlled releasing agent also has nontoxic and biodegradable characteristic, and the various nutritive ingredients in the corn are effectively utilized.Used Semen Maydis powder is to wear into fine powder by corn to make among the present invention, and fineness should reach 40 orders or thinner.
Bentonitic use in the slow/controlled releasing agent of the present invention is to utilize its laminate structure characteristic, makes insert mass-energy enough enter the interlayer copolymerization, forms cancellated water-absorbing material thus, and slow release effect is significantly improved.Wilkinite belongs to light mineral matter, good dispersity, and gel-strength is good.In addition, the consistency of wilkinite and soil is good, aboundresources, and wide material sources, with low cost.The used bentonitic fineness of the present invention should reach 300 orders or thinner.
The magnesiumcarbonate that uses in the slow/controlled releasing agent of the present invention not only contains the trace element that helps plant-growth, and its dispersed preferably ventilation property that can increase finished product, have in being manured into soil good loosen the soil, ventilation and effect such as permeable.The preferred in the present invention better Magnesium Carbonate Light 41-45 of dispersiveness that uses.
Slow/controlled releasing agent of the present invention belongs to graft copolymer, and has a large amount of carboxyls, amido and amino three big hydrophilic groups, is easy to adsorb mutually with fertilizer, biotechnological formulation or agricultural chemicals.In addition, the magnesium elements in the magnesiumcarbonate belongs to light metal, also is a kind of absorption toughener.Therefore this slow/controlled releasing agent is big with the adsorptive power of fertilizer, biotechnological formulation or agricultural chemicals, and bag connects the intensity height, need not tackiness agent and can finish bag and connect.Like this, when preparing slowly/controlled releasing fertilizer, slow/controlled release biotechnological formulation or slow/controlled release agricultural chemicals, just need not to change the existing production route and the equipment of fertilizer plant or insecticide factory with slow/controlled releasing agent of the present invention.In the production process of fertilizer, biotechnological formulation or agricultural chemicals, or after forming finished product, directly add slow/controlled releasing agent of the present invention, can produce slowly/controlled releasing fertilizer, slow/controlled release biotechnological formulation or slow/controlled release agricultural chemicals.Both need not to increase processing step, also do not needed to acquire new equipment, used very convenient.
Slow/controlled releasing agent of the present invention is used to prepare slow/controlled release solid fertilizer, agricultural chemicals and biotechnological formulation, and addition is 0.4-3% fertile, medicine weight.
Slow/controlled releasing agent of the present invention is used to prepare the slow/controlled release fertilizer, and addition is the 0.4-1% of fertilizer weight.
Slow/controlled releasing agent of the present invention is used to prepare slow/controlled release liquid fertilizer, agricultural chemicals and biotechnological formulation, and addition is the 0.3-0.5% of fertilizer, medicine and biotechnological formulation weight.
Slow/controlled releasing agent of the present invention also can be used for agricultural preparations such as plant-growth regulator, biotechnological formulation, is suitable for the slow/controlled release preparation that agroforestry are used accordingly to make.
The preparation method of fertilizer of the present invention, pesticide slow/controlled releasing agent comprises the steps:
(1) with alkali lye vinylformic acid is carried out in and pre-treatment, neutralizer;
(2) under catalyzer and activator existence condition, make neutralizer, acrylamide, Semen Maydis powder, wilkinite and magnesiumcarbonate generation graft copolymerization;
(3) gained multipolymer cooling, dry after the section and pulverize.
Used alkali lye in (1) step of above-mentioned reaction can be sodium hydroxide or potassium hydroxide solution.Use potassium hydroxide solution, its finished product can be plant-growth some potassium elements is provided, but cost is higher; Use sodium hydroxide solution, then can reduce product cost, and the sodium acrylate that forms in reaction process still makes a kind of important carrier of agricultural chemicals, the effect of effective preservation agricultural chemicals that it had also can improve the resistance against diseases of plant greatly.Therefore the present invention uses sodium hydroxide solution that vinylformic acid is neutralized in an embodiment.
Bake out temperature is 80-100 ℃ in above-mentioned reaction (3) step, and drying time 4-5 hour, being crushed to granularity after the oven dry was the 20-200 order.
Graft copolymerization is undertaken by following step in (2) step of above-mentioned reaction:
(a) drop into acrylamide, Semen Maydis powder, wilkinite, catalyzer, magnesiumcarbonate and activator successively in neutralizer, react, temperature of reaction is 32-42 ℃, and the reaction times is 50-80 minute;
(b) add short poly-agent ammoniacal liquor to reaction solution, ammonia concn is 16-25%, and ammonia concn is preferably 18-20%, then reaction solution is put into uncovered reaction vessel and is continued reaction, makes graftomer.
In (b) step of above-mentioned reaction, add ammoniacal liquor as short poly-agent, can regulate the pH value of the finished product, make it be neutral; Simultaneously, the amino of generation belongs to hydrophilic radical, can increase finished product and adsorptive power fertile, medicine.And, adding a large amount of heats that produced behind the ammoniacal liquor can make reaction system not need indirect heating, also need not add under the situation of linking agent, by self heat release, self-crosslinking reaction takes place fast, equably, generate slow/controlled releasing agent multipolymer with three-dimensional space and network structure.After adding ammoniacal liquor, self-crosslinking reaction generally can be finished in 10 minutes.Reacting required used ammonia concn is 16-25%, and ammonia concn is higher than 25%, can make reaction too violent; Ammonia concn is lower than 16%, the heat that produces less, not enough so that reaction is carried out fast.Ammonia concn preferably is 18-20%.Therefore, the adding of short poly-agent ammoniacal liquor makes that preparation method production technique of the present invention is simple, and the reaction times is short, the normal temperature and pressure operation, and Semen Maydis powder does not need gelatinization in the production process, and product need not wash and filter, and, does not produce " three wastes " without saponification.Compare with common process, have energy-conservation, when joint, environmental friendliness, output capacity is high and is convenient to multinomial remarkable advantages such as suitability for industrialized production.The product of producing nontoxic, tasteless, the quality guaranteed period can reach more than 3 years.
The preparation of slow/controlled releasing agent of the present invention is under catalyst action, at first on Semen Maydis powder natural polymer skeleton, produce radical, by propylene monomer graft copolymerization on radical, the heat that is produced after adding by ammoniacal liquor then carries out self-crosslinking, the final slow/controlled releasing agent with three-dimensional space and network structure that generates.This structure makes this slow/controlled releasing agent water insoluble, water-swellable, can be in the same place with fertilizer, biotechnological formulation, agricultural chemicals and water etc. are closely fused, reach repeatedly and absorb, store the purpose that gentle slow release is put fertilizer, agricultural chemicals and water, thereby reduce the leaching loss transpiration of fertilizer, biotechnological formulation or agricultural chemicals effectively, common fertilizer, biotechnological formulation or agricultural chemicals have been overcome in rising too much, the under-supply drawback of later stage of plant-growth leaching loss in early stage, fertilizer, biotechnological formulation and agricultural chemicals and water can normally be played a role in the long time, reach the effect of slow/controlled release.Its advantage is the utilization ratio that has improved fertilizer, biotechnological formulation and agricultural chemicals greatly, has reduced the consumption of fertilizer, biotechnological formulation and agricultural chemicals.Single-dose application, medication, its action effect can extend to half a year to three year, also corresponding thus alleviated because of repeatedly fertilising, environmental pollution and the objectionable impurities on farm crop that medication caused residual.
Because moisture be inhaled, be released to slow/controlled releasing agent of the present invention can repeatedly in long-time, and can absorb airborne moisture, slowly/controlled releasing fertilizer or agricultural chemicals with its production, not only applicable to China's southern area, and, at lack of water arid and semi-arid area and arid season short of rain, still can bring into play the effect of fertilizer and agricultural chemicals effectively, promote the growth of plant.
Slow/controlled releasing agent of the present invention degradable in soil, life-time service can not damage edatope.After fertilizer, medicine and biotechnological formulation mix, can not influence or change the characteristic and the effect of fertilizer or agricultural chemicals, can play consistently the effect of these fertilizer or agricultural chemicals.Simultaneously, it can also be applied in big Tanaka separately, can play the good soil moisture conservation of loosening the soil, venting and water permeable, the strong root of keeping a full stand of seedings, promote the effect of plant-growth, thereby embody the multifunctionality of this product.
Catalyst system therefor is selected ammonium persulphate or Potassium Persulphate for use in the reaction; Activator is selected polyvalent alcohols such as polyoxyethylene glycol, glycerol or ethylene glycol for use.
In the above-mentioned reaction, the preferred usage ratio of each raw material is:
Vinylformic acid 200-300ml, alkali lye (is 26% in concentration) 250-350ml, acrylamide 180-260g, Semen Maydis powder 50-100g, wilkinite 30-60g, magnesiumcarbonate 10-20g, ammoniacal liquor (is 20% in concentration) 8-160ml, catalyzer 2-6g, activator 2.5-5g.
Preferred usage ratio is:
Vinylformic acid 220-240ml, alkali lye (is 26% in concentration) 320-340ml, acrylamide 200-220g, Semen Maydis powder 50-80g, wilkinite 40-50g, magnesiumcarbonate 10-15g, ammoniacal liquor (is 20% in concentration) 80-160ml, catalyzer 3-5g, activator 2.5-5g.
Slow/controlled releasing agent of the present invention is being done simultaneous test through Shanghai Hanfeng Slow Release Fertilizer Co., Ltd on the lawn: test group is used by this slow/controlled releasing agent and the slow-release fertilizer of making after common fertilizer mixes, and control group is used common fertilizer.In three months, observations shows: the fertilizer efficiency of the fertilizer efficiency of applied once slow-release fertilizer and the common fertilizer of administered twice is suitable.
Slow/controlled releasing agent of the present invention is used to produce slow release fertilizer by ground, Qingdao grace bio tech ltd as fertilizer sources sustained release dosage, and this slow release fertilizer exports to Malaysia and makees the special-purpose fertilizer of oil palm, and opposes than test with other slow release fertilizer.The content of test is after using slow release fertilizer three months and six months, measures N in the soil, P respectively
2O
5, K
2The content of O.The result shows: with back three months, use N, P in the soil of this slow release fertilizer
2O
5, K
2O content is than N, P in the soil that uses other slow release fertilizer
2O
5, K
2The content of O exceeds more than 8%; And with back six months, use N, P in the soil of this slow release fertilizer
2O
5, K
2The content of O is than N, P in the soil that uses other slow release fertilizer
2O
5, K
2The content of O exceeds more than 11%, and uses the growing way of the oil palm of this slow release fertilizer also to be better than using the growing way of the oil palm of other fertilizer.
Slow/controlled releasing agent of the present invention is used for the slow release effect of agricultural chemicals by having done test to the dispenser of eggplant field soil, and test group is made slow/controlled release agricultural chemicals applied once with slow/controlled releasing agent of the present invention and common agricultural chemicals thorough mixing, and control group adopts common agricultural chemicals applied once.When eggplant begins to plant, concentrate to be applied near the soil of crop.Carry out effect observation in five months continuously, the result shows: test group is compared with control group, the blight decreased average sickness rate 35% of eggplant, verticillium decreased average sickness rate 26%.
Embodiment
Embodiment 1:
200ml puts into reactor with vinylformic acid, measures 26% sodium hydroxide solution 250ml, adds in the reactor to neutralize with vinylformic acid.
The neutralizer temperature is cooled to 60 ℃, adds acrylamide 180g again and mix.When under agitation making temperature reduce to 35 ℃, add Semen Maydis powder 50g (fineness is 40 orders) and wilkinite 30g (fineness is 325 orders).Stirred 20 minutes, and after waiting to be uniformly dispersed, added Potassium Persulphate 2g, polyoxyethylene glycol (400) 2.5g, Magnesium Carbonate Light 41-45 10g successively.Keep 38 ℃ of reacting liquid temperatures, stir reaction down 40 minutes, add 20% ammoniacal liquor 80ml then, and fast reaction solution is put into uncovered reaction vessel, after 5-8 minute, reaction solution carries out rapid reaction, is reflected in the time about 7 minutes to finish.
Question response finishes, section behind the resulting polymers naturally cooling, oven dry, pulverizing.85-95 ℃ of product bake out temperature, drying time 5 hours.Be crushed to 20 orders after the oven dry, packing promptly gets this slow/controlled releasing agent.
Embodiment 2
300ml puts into reactor with vinylformic acid, measures 26% sodium hydroxide solution 350ml, adds in the reactor to neutralize with vinylformic acid.
The neutralizer temperature is cooled to 60 ℃, adds acrylamide 260g again and mix.When under agitation making temperature reduce to 35 ℃, add Semen Maydis powder 100g (fineness is 60 orders) and wilkinite 60g (fineness is 300 orders).Stirred 20 minutes, and after waiting to be uniformly dispersed, added Potassium Persulphate 6g, polyoxyethylene glycol (600) 5g, Magnesium Carbonate Light 41-45 20g successively.Keep 38 ℃ of reacting liquid temperatures, stir reaction down 40 minutes, add 20% ammoniacal liquor 160ml then, and fast reaction solution is put into uncovered reaction vessel, reaction solution carries out rapid reaction.
Question response finishes, section behind the resulting polymers naturally cooling, oven dry, pulverizing.90-100 ℃ of product bake out temperature, drying time 4.5 hours.Be crushed to 60 orders after the oven dry, packing promptly gets this slow/controlled releasing agent.
Embodiment 3
270ml puts into reactor with vinylformic acid, measures 26% sodium hydroxide solution 325ml, adds in the reactor to neutralize with vinylformic acid.
The neutralizer temperature is cooled to 60 ℃, adds acrylamide 234g again and mix.When under agitation making temperature reduce to 35 ℃, add Semen Maydis powder 75g (fineness is 50 orders) and wilkinite 40g (fineness is 300 orders).Stirred 20 minutes, and after waiting to be uniformly dispersed, added ammonium persulphate 2.6g, glycerol 3.5g, Magnesium Carbonate Light 41-45 15g successively.Keep 38 ℃ of reacting liquid temperatures, stir reaction down 40 minutes, add 20% ammoniacal liquor 110ml then, and fast reaction solution is put into uncovered reaction vessel, reaction solution carries out rapid reaction.
Question response finishes, with resulting polymers cooling back section, oven dry, pulverizing.90-100 ℃ of product bake out temperature, drying time 4.5 hours.Be crushed to 100 orders after the oven dry, packing promptly gets this slow/controlled releasing agent.
Embodiment 4
480ml puts into reactor with vinylformic acid, measures 26% sodium hydroxide solution 600ml, adds in the reactor to neutralize with vinylformic acid.
The neutralizer temperature is cooled to 60 ℃, adds acrylamide 410g again and mix.When under agitation making temperature reduce to 35 ℃, add Semen Maydis powder 120g (fineness is 50 orders) and wilkinite 70g (fineness is 300 orders).Stirred 20 minutes, and after waiting to be uniformly dispersed, added Potassium Persulphate 6g, ethylene glycol 6.4g, Magnesium Carbonate Light 41-45 26g successively.Keep 38 ℃ of reacting liquid temperatures, stir reaction down 40 minutes, add 22% ammoniacal liquor 190ml then, and fast reaction solution is put into uncovered reaction vessel, reaction solution carries out rapid reaction.
Question response finishes, with resulting polymers cooling back section, oven dry, pulverizing.90-100 ℃ of product bake out temperature, drying time 4.5 hours.Be crushed to 120 orders after the oven dry, packing promptly gets this slow/controlled releasing agent.
Embodiment 4
480ml puts into reactor with vinylformic acid, measures 26% sodium hydroxide solution 600ml, adds in the reactor to neutralize with vinylformic acid.
The neutralizer temperature is cooled to 60 ℃, adds acrylamide 410g again and mix.When under agitation making temperature reduce to 35 ℃, add Semen Maydis powder 120g (fineness is 50 orders) and wilkinite 70g (fineness is 300 orders).Stirred 20 minutes, and after waiting to be uniformly dispersed, added Potassium Persulphate 6g, polyoxyethylene glycol (600) 6.4g, Magnesium Carbonate Light 41-45 26g successively.Keep 38 ℃ of reacting liquid temperatures, stir reaction down 40 minutes, add 20% ammoniacal liquor 200ml then, and fast reaction solution is put into uncovered reaction vessel, reaction solution carries out rapid reaction.
Question response finishes, with resulting polymers cooling back section, oven dry, pulverizing.90-100 ℃ of product bake out temperature, drying time 4.5 hours.Be crushed to 160 orders after the oven dry, packing promptly gets this slow/controlled releasing agent.
Embodiment 5
220ml puts into reactor with vinylformic acid, measures 26% sodium hydroxide solution 320ml, adds in the reactor to neutralize with vinylformic acid.
The neutralizer temperature is cooled to 60 ℃, adds acrylamide 200g again and mix.When under agitation making temperature reduce to 35 ℃, add Semen Maydis powder 55g (fineness is 50 orders) and wilkinite 40g (fineness is 300 orders).Stirred 20 minutes, and after waiting to be uniformly dispersed, added Potassium Persulphate 3g, glycerol 3g, Magnesium Carbonate Light 41-45 11g successively.Keep 38 ℃ of reacting liquid temperatures, stir reaction down 40 minutes, add 18% ammoniacal liquor 100ml then, and fast reaction solution is put into uncovered reaction vessel, reaction solution carries out rapid reaction.
Question response finishes, with resulting polymers cooling back section, oven dry, pulverizing.90-100 ℃ of product bake out temperature, drying time 4.5 hours.Be crushed to 180 orders after the oven dry, packing promptly gets this slow/controlled releasing agent.
Claims (10)
1, a kind of fertilizer, pesticide slow/controlled releasing agent, it is characterized in that and can be carried out graft copolymerization by following usage ratio and got by following main raw material: vinylformic acid 200-300ml, alkali lye be 26% 250-350ml, acrylamide 180-260g, Semen Maydis powder 50-100g, wilkinite 30-60g, magnesiumcarbonate 10-20g in concentration.
2, the preparation method of the described fertilizer of claim 1, pesticide slow/controlled releasing agent is characterized in that comprising step:
(1) with alkali lye vinylformic acid is carried out in and pre-treatment, neutralizer;
(2) under catalyzer and activator existence condition, make neutralizer, acrylamide, Semen Maydis powder, wilkinite and magnesiumcarbonate generation graft copolymerization; Catalyzer is ammonium persulphate or Potassium Persulphate; Activator is polyoxyethylene glycol, glycerol or ethylene glycol;
(3) gained multipolymer cooling, dry after the section and pulverize.
3, the preparation method of fertilizer according to claim 2, pesticide slow/controlled releasing agent is characterized in that graft copolymerization is undertaken by following step:
(a) drop into acrylamide, Semen Maydis powder, wilkinite, catalyzer, magnesiumcarbonate and activator successively in neutralizer, react, temperature of reaction is 32-42 ℃, and the reaction times is 50-80 minute;
(b) add short poly-agent ammoniacal liquor to reaction solution, ammonia concn is 16-25%, then reaction solution is put into uncovered reaction vessel and is continued reaction, makes graftomer.
4, the preparation method of fertilizer according to claim 3, pesticide slow/controlled releasing agent is characterized in that the usage ratio of each reaction raw materials is:
Vinylformic acid 200-300ml, alkali lye are that 26% 250-350ml, acrylamide 180-260g, Semen Maydis powder 50-100g, wilkinite 30-60g, magnesiumcarbonate 10-20g, ammoniacal liquor are 20% 80-160ml, catalyzer 2-6g, activator 2.5-5g in concentration in concentration.
5, the preparation method of fertilizer according to claim 4, pesticide slow/controlled releasing agent is characterized in that the usage ratio of each reaction raw materials is:
Vinylformic acid 220-240ml, alkali lye are that 26% 320-340ml, acrylamide 200-220g, Semen Maydis powder 50-80g, wilkinite 40-50g, magnesiumcarbonate 10-15g, ammoniacal liquor are 20% 80-160ml, catalyzer 3-5g, activator 2.5-5g in concentration in concentration.
6,, it is characterized in that activator is polyoxyethylene glycol, glycerol or ethylene glycol according to the preparation method of claim 2,3,4 or 5 described fertilizer, pesticide slow/controlled releasing agent.
7,, it is characterized in that described wilkinite fineness is more than 300 orders according to the preparation method of claim 2,3,4 or 5 described fertilizer, pesticide slow/controlled releasing agent.
8,, it is characterized in that described magnesiumcarbonate is Magnesium Carbonate Light 41-45 according to the preparation method of claim 2,3,4 or 5 described fertilizer, pesticide slow/controlled releasing agent.
9, the preparation method of fertilizer according to claim 3, pesticide slow/controlled releasing agent is characterized in that described ammonia concn is 18-20%.
10, the described fertilizer of claim 1, the application of pesticide slow/controlled releasing agent in preparation slowly/controlled releasing fertilizer, agricultural chemicals.
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| CN103319278B (en) * | 2013-05-23 | 2015-02-25 | 锦州硕丰农药集团有限公司 | Multifunctional pesticide fertilizer and production method thereof |
| CN104003807B (en) * | 2014-06-12 | 2017-10-03 | 青岛科技大学 | A kind of double wrapped water-retaining type sustained release pesticide granules preparation and preparation method |
| CN105461416A (en) * | 2014-08-26 | 2016-04-06 | 青岛鑫润土苗木专业合作社 | Fermented water retention type sustained-release preparation and preparation method |
| CN104591906A (en) * | 2015-02-04 | 2015-05-06 | 马法东 | Organic calcium magnesium fertilizer and preparation method thereof |
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|---|---|---|---|---|
| CN103224428A (en) * | 2013-04-25 | 2013-07-31 | 苏州谷力生物科技有限公司 | Moisture retention organic fertilizer and preparation method thereof |
| CN103224428B (en) * | 2013-04-25 | 2014-08-06 | 苏州谷力生物科技有限公司 | Moisture retention organic fertilizer and preparation method thereof |
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| CN1810732A (en) | 2006-08-02 |
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