CN104119468A - Preparation method of high-molecular water-absorbent resin nitrogen-potassium water retention controlled release fertilizer - Google Patents
Preparation method of high-molecular water-absorbent resin nitrogen-potassium water retention controlled release fertilizer Download PDFInfo
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Abstract
The invention provides a preparation method of a high-molecular water-absorbent resin nitrogen-potassium water retention controlled release fertilizer. The preparation method includes the steps of preparation of an aqueous solution of sodium hydroxide, a neutralization reaction, a copolymerization reaction, solidification drying, and crushing. The method shortens the process flow, reduces the production time and reduces the production cost. The method solves a problem of damages of heavy use of a traditional chemical fertilizer to soil, water and air, and also increases the content of nitrogen and potassium elements in the water retention fertilizer. The method has the advantages of no generation of three wastes (industrial residue, waste gas and waste water) in the production process, no pollution to the environment, safety, environmental protection, and stable product quality.
Description
Technical field
The preparation method who the present invention relates to a kind of hydroscopic high-molecular resin nitrogen potassium water holding controlled release fertilizer, specifically belongs to hydroscopic high-molecular resin and claims again (SAP) production technique of water-holding agent.
Background technology
。The preparation method of a kind of hydroscopic high-molecular resin nitrogen of the present invention potassium water holding controlled release fertilizer, by the method for the chemical modification of hydroscopic high-molecular resin production technique and hydrophilic polymer, fertilizer nutrient group is bonded in macromolecular skeleton structure, thereby makes its existing water-absorbing-retaining performance, have a slow controlled release properties again.The fertile novel material of nitrogen potassium water holding controlled release forming as polymerizable raw material taking vinylformic acid and sodium hydroxide and potassium sulfate, urea and polyethylene glycol crosslinked agent, Potassium Persulphate initiator, its water absorbent rate 200-300g/g; Nitrogen content >=20%; Potassium oxide content >=18%; Total nutrient >=38%.The effect of water-holding agent in agricultural becomes more and more important, and the integrated use of fertilizer and water-holding agent is the important technology of water-fertilizer conditioning, is the international forward position of fertilizer research.Water-holding agent is that water regain exceedes hundreds of times of above wetting ability superpolymer of own wt.Water-holding agent is generally divided into natural, synthetic and semisynthetic.Water-holding agent and fertilizer can be by the water conservation sustained-controll-release fertilisers of physical mixed, coating or three kinds of being combined as a whole of mode of chemosynthesis.Water-holding agent has water suction and inhales fertile function, and the adsorbable a large amount of neutral molecules of water-holding agent, also have stronger adsorption to positively charged ion nutrient, a little less than negatively charged ion Nutrient absorption.Fertilizer type and salt concn affect adsorption and the swelling capacity of water-holding agent.Water conservation sustained-controll-release fertiliser has delayed release effect to fertilizer nutrient in soil.Water conservation sustained-controll-release fertiliser can improve soil to be held retaining and divides and liquid manure interaction, promotes absorption and the crop yield of plant to nutrient.Water conservation sustained-controll-release fertiliser developing direction is chemosynthesis water conservation sustained-controll-release fertiliser.
There is 42.9% dry cropland in the whole world, and how impelling the more rainfalls of soil reservation " to need to use " in order to plant is the problem that dry farming faces, and water-holding agent is an Application and Development important water-absorbing-retaining chemical for many years.But the independent use of water-holding agent not only increases farmland operation number of times and cost, and because water-holding agent consumption is few, be difficult to fully contact with fertilizer, it receives moisture to be difficult to interact with fertilizer, the performance of the impact water efficiency of protecting.On the other hand; China's agricultural water accounts for 80% left and right of water resources consumption, however global water resources crisis make development that Irrigation farming also must walk water conservation water saving by way of, therefore; water-holding agent not only plays an important role to dry farming water-absorbing-retaining, and Irrigation farming is had to using value too.
In addition,, due to the water-soluble height of conventional fertilizer, nutrient discharges fast, release period is short, the fertilizer nutrient release period of single-dose application method and intensity conventionally and crop nutrition content absorption phase and intensity do not match, the nutrient of release can not absorb in time, fertilizer nutrient loss is very large, and fertilizer nutrient utilization ratio is low.Though split application can be avoided the problem of single-dose application method, improve the supply of crop different growing fertilizer nutrient, for agricultural modernization, split application is loaded down with trivial details and cost is high.Slow, the release and release control fertilizer of Recent study exploitation adopt various mechanism to control conventional fertilizer is water-soluble, effectively delay or control fertilizer nutrient to discharge, make fertilizer nutrient release period and intensity and crop nutrition content absorbing rule substantially identical, greatly reduce fertilizer nutrient loss, improved fertilizer nutrient utilization ratio.But soil water content and validity are also depended in the performance of fertilizer efficiency.Between water, fertilizer, exist interaction, " short fertile with water, with fertile water transfer " is important water, fertile control technique of agricultural." fertilizer " in agricultural in " with fertile water transfer " can pass through fertilizing soil, also can realize the regulation and control utilization to soil moisture by fertilising.But, current conventional fertilizer is gentle, release and release control fertilizer does not have water-absorbing-retaining function, in order further to promote fertile, water integrated mutual work, improve liquid manure production efficiency, during water-holding agent water retaining function, control release technic and fertilizer are compound in one by Technology, research and development water holding controlled release fertilizer is the production practical problems that need to urgently solve, and is also the needs that liquid manure is done mutually and coupled wave theory is put into practice.Water-holding agent is mixed with fertilizer and do mutually the morning that research is carried out, and with regard to water-holding agent, the impact of fertilizer effect is carried out to research abroad in the seventies in last century.China carried out water-holding agent and the fertilizer research of work mutually 80 years last century.In addition the model research of dry farming water and fertilizer coupling, has also obtained larger progress.But, be only about fertilizer and the technical study of water-holding agent composite integrated that the mid-90 in last century starts, in recent years, water holding controlled release fertilizer research receives publicity day by day.For this reason, to the achievement in research of fertilizer and the integrated Water-retaining slow-release fertilizer of water-holding agent chemosynthesis, to promote water holding controlled release fertilizer research and industrialization.
Summary of the invention
The deficiency existing for prior art, technical problem to be solved by this invention is, a kind of preparation method of hydroscopic high-molecular resin nitrogen potassium water holding controlled release fertilizer is provided, shorten hydroscopic high-molecular resin technical process, reduce the production time, reduce production costs, solve the harm of excessive use traditional fertilizer to soil, water source and air, having increased the nitrogen of SAP water-holding agent to demand of plant growth and the content of potassium, is the special water holding controlled release fertilizer of agroforestry, constant product quality.
For solving the problems of the technologies described above, the technical solution used in the present invention is that a kind of preparation method of hydroscopic high-molecular resin nitrogen potassium water holding controlled release fertilizer, comprises following content:
(1) be mixed with 32.5% NaOH aqueous solution 1070g;
(2) neutralization reaction: the NaOH aqueous solution preparing is splashed into 2000g purity continuously and be greater than in 99.5% vinylformic acid, carry out neutralization reaction, reaction times is 20 minutes, adds 1200g(nitrogen content >=46%) urea, 1180g(potassium oxide content >=50%) potassium sulfate; Then cool to 56-65 DEG C;
(3) copolyreaction: in the solution after neutralization reaction, add 5g methylene radical acrylamide linking agent, carrying out mixing speed is that 90-100 turns, after 10 minutes, add 7g Potassium Persulphate initiator, be warmed to 65-70 DEG C and carry out copolyreaction, temperature in reaction process is controlled at 110 DEG C-115 DEG C, and the reaction times is 15 minutes;
(4) solidify dry: reaction mixture is diverted in polymerization digestor; React mixed solution after 10-20 minute and aggregate into solid, in polymerization process, heat of polymerization makes material seasoning;
(5) pulverize: solid phase prod is ground into particle, gets product.
PH value is 6.3, water absorbent rate 256g/g; Nitrogen content >=20%; Potassium oxide content >=18%; Total nutrient >=38%.
The preparation method of above-mentioned hydroscopic high-molecular resin nitrogen potassium water holding controlled release fertilizer, the vinylformic acid using: 1.051 gram per centimeters when proportion is 20 DEG C
3, boiling point is 141.3 DEG C, flash-point is 54.5 DEG C.
The preparation method of above-mentioned hydroscopic high-molecular resin nitrogen potassium water holding controlled release fertilizer, comprises following content:
(1) be mixed with 32.5% NaOH aqueous solution 1090g;
(2) neutralization reaction: the NaOH aqueous solution preparing is splashed into 2000g purity continuously and be greater than in 99.5% vinylformic acid, carry out neutralization reaction, reaction times is 20 minutes, adds 1270g(nitrogen content >=46%) urea, 1100g(potassium oxide content >=50%) potassium sulfate; Then cool to 56-65 DEG C;
(3) copolyreaction: in the solution after neutralization reaction, add 3g methylene radical acrylamide linking agent, carrying out mixing speed is that 90-100 turns, after 10 minutes, add 5g Potassium Persulphate initiator, be warmed to 65-70 DEG C and carry out copolyreaction, temperature in reaction process is controlled at 110 DEG C-115 DEG C, and the reaction times is 15 minutes;
(4) solidify dry: reaction mixture is diverted in polymerization digestor; React mixed solution after 10-20 minute and aggregate into solid, in polymerization process, heat of polymerization makes material seasoning;
(5) pulverize: solid phase prod is ground into particle, gets product.
PH value is 6.3, water absorbent rate 236g/g; Nitrogen content >=20%; Potassium oxide content >=18%; Total nutrient >=38%.
The preparation method of above-mentioned hydroscopic high-molecular resin nitrogen potassium water holding controlled release fertilizer, the vinylformic acid using: 1.051 gram per centimeters when proportion is 20 DEG C
3, boiling point is 141.3 DEG C, flash-point is 54.5 DEG C.
a kind of hydroscopic high-molecular resin of the present invention is manufactured the preparation method of nitrogen potassium water holding controlled release fertilizer, and tool has the following advantages and beneficial effect:
1, on production technology process, once aggregate into product, dry without baking, the process of polymerization exotherm is exactly dry process, without processes such as washing, saponification, makes the technological process of production shorten 5 times, can in 1 left and right hour, produce finished product, reduce production costs; Solve the harm of traditional fertilizer to soil, improved soil, improved the utilization ratio of liquid manure.Meanwhile, in production process, produce environmentally safe, safety and environmental protection without the three wastes (waste material, waste gas, waste water).
2, constant product quality, traditional chemical fertilizer can not be placed directly in plant root, and hydroscopic high-molecular resin nitrogen potassium water holding controlled release fertilizer can be placed directly in plant root, to the growth of root system of plant without injury, after evenly mixing with soil, the liquid manure in storage soil that can be a large amount of and the fertilizer of self.Do not evaporate and do not run off for a long time, improve preserving soil moisture, water conservation, fertilizer-preserving ability, supply with uniformly nutrition according to demand of plant growth, effectively promote the surviving of plant, g and D, guarantee that plant-growth resists arid ability.Meanwhile, improved soil nodule structure, keeps soil from packing together and salinization, makes the liquid manure of soil be difficult for running off, and improves soil liquid manure utilization ratio.The censorship of water-retention fertilizer product, test through key lab of dry farming technology Shandong Province of Qingdao Agricultural University: SAP nitrogen potassium water-retention fertilizer, pH value is 6.6, water absorbent rate 247g/g; Nitrogen content >=20%; Potassium oxide content >=18%; Total nutrient >=38%.
Embodiment
embodiment 1
The preparation method of the hydroscopic high-molecular resin nitrogen potassium water holding controlled release fertilizer of the present embodiment, comprises following content: (1) is mixed with 31.5% NaOH aqueous solution 1070g;
(2) neutralization reaction: the NaOH aqueous solution preparing is splashed into 2000g purity continuously and be greater than in 99.5% vinylformic acid, carry out neutralization reaction, reaction times is 20 minutes, adds 1230g(nitrogen content >=46%) urea, 1182g(potassium oxide content >=50%) potassium sulfate; Then cool to 56-65 DEG C;
(3) copolyreaction: in the solution after neutralization reaction, add 3g methylene radical acrylamide linking agent, carrying out mixing speed is that 90-100 turns, after 10 minutes, add 9g Potassium Persulphate initiator, be warmed to 65-70 DEG C and carry out copolyreaction, temperature in reaction process is controlled at 110 DEG C-115 DEG C, and the reaction times is 15 minutes;
(4) solidify dry: reaction mixture is diverted in polymerization digestor; React mixed solution after 10-20 minute and aggregate into solid, in polymerization process, heat of polymerization makes material seasoning;
(5) pulverize: solid phase prod is ground into particle, gets product.
PH value is 6.5, water absorbent rate 252g/g; Nitrogen content >=20%; Potassium oxide content >=18%; Total nutrient >=38%.
The preparation method of above-mentioned hydroscopic high-molecular resin nitrogen potassium water holding controlled release fertilizer, the vinylformic acid using: 1.051 gram per centimeters when proportion is 20 DEG C
3, boiling point is 141.3 DEG C, flash-point is 54.5 DEG C.
embodiment 2
The preparation method of the hydroscopic high-molecular resin nitrogen potassium water holding controlled release fertilizer of the present embodiment, comprises following content:
(1) be mixed with 30.5% NaOH aqueous solution 1071g;
(2) neutralization reaction: the NaOH aqueous solution preparing is splashed into 2000g purity continuously and be greater than in 99.5% vinylformic acid, carry out neutralization reaction, reaction times is 20 minutes, adds 1230g(nitrogen content >=46%) urea, 1130g(potassium oxide content >=50%) potassium sulfate; Then cool to 56-65 DEG C;
(3) copolyreaction: in the solution after neutralization reaction, add 5g methylene radical acrylamide linking agent, carrying out mixing speed is that 90-100 turns, after 10 minutes, add 3g Potassium Persulphate initiator, be warmed to 65-70 DEG C and carry out copolyreaction, temperature in reaction process is controlled at 110 DEG C-115 DEG C, and the reaction times is 15 minutes;
(4) solidify dry: reaction mixture is diverted in polymerization digestor; React mixed solution after 10-20 minute and aggregate into solid, in polymerization process, heat of polymerization makes material seasoning;
(5) pulverize: solid phase prod is ground into particle, gets product.
PH value is 6.3, water absorbent rate 236g/g; Nitrogen content >=20%; Potassium oxide content >=18%; Total nutrient >=38%.
The preparation method of above-mentioned hydroscopic high-molecular resin nitrogen potassium water holding controlled release fertilizer, the vinylformic acid using: 1.051 gram per centimeters when proportion is 20 DEG C
3, boiling point is 141.3 DEG C, flash-point is 54.5 DEG C.
embodiment 3
The preparation method of the hydroscopic high-molecular resin nitrogen potassium water holding controlled release fertilizer of the present embodiment, comprises following content:
(1) be mixed with 32.% NaOH aqueous solution 1075g;
(2) neutralization reaction: the NaOH aqueous solution preparing is splashed into 2000g purity continuously and be greater than in 99.5% vinylformic acid, carry out neutralization reaction, reaction times is 20 minutes, adds 1250g(nitrogen content >=46%) urea, 1172g(potassium oxide content >=50%) potassium sulfate; Then cool to 56-65 DEG C;
(3) copolyreaction: in the solution after neutralization reaction, add 7g methylene radical acrylamide linking agent, carrying out mixing speed is that 90-100 turns, after 10 minutes, add 5g Potassium Persulphate initiator, be warmed to 65-70 DEG C and carry out copolyreaction, temperature in reaction process is controlled at 110 DEG C-115 DEG C, and the reaction times is 15 minutes;
(4) solidify dry: reaction mixture is diverted in polymerization digestor; React mixed solution after 10-20 minute and aggregate into solid, in polymerization process, heat of polymerization makes material seasoning;
(5) pulverize: solid phase prod is ground into particle, gets product.
PH value is 6.3, water absorbent rate 226g/g; Nitrogen content >=20%; Potassium oxide content >=18%; Total nutrient >=38%.The preparation method of above-mentioned hydroscopic high-molecular resin nitrogen potassium water holding controlled release fertilizer, the vinylformic acid using: 1.051 gram per centimeters when proportion is 20 DEG C
3, boiling point is 141.3 DEG C, flash-point is 54.5 DEG C.
embodiment 4
The preparation method of a kind of hydroscopic high-molecular resin nitrogen potassium water holding controlled release fertilizer of the present embodiment, comprises following content:
(1) be mixed with 31% NaOH aqueous solution 1076g;
(2) neutralization reaction: the NaOH aqueous solution preparing is splashed into 2000g purity continuously and be greater than in 99.5% vinylformic acid, carry out neutralization reaction, reaction times is 20 minutes, adds 1270g(nitrogen content >=46%) urea, 1183g(potassium oxide content >=50%) potassium sulfate; Then cool to 56-65 DEG C;
(3) copolyreaction: in the solution after neutralization reaction, add 5g methylene radical acrylamide linking agent, carrying out mixing speed is that 90-100 turns, after 10 minutes, add 8g Potassium Persulphate initiator, be warmed to 65-70 DEG C and carry out copolyreaction, temperature in reaction process is controlled at 110 DEG C-115 DEG C, and the reaction times is 15 minutes;
(4) solidify dry: reaction mixture is diverted in polymerization digestor; React mixed solution after 10-20 minute and aggregate into solid, in polymerization process, heat of polymerization makes material seasoning;
(5) pulverize: solid phase prod is ground into particle, gets product.
PH value is 6.4, water absorbent rate 236g/g; Nitrogen content >=20%; Potassium oxide content >=18%; Total nutrient >=38%.The preparation method of above-mentioned hydroscopic high-molecular resin nitrogen potassium water holding controlled release fertilizer, the vinylformic acid using: 1.051 gram per centimeters when proportion is 20 DEG C
3, boiling point is 141.3 DEG C, flash-point is 54.5 DEG C.
The above, be only preferred embodiment of the present invention, is not the restriction of the present invention being made to other form, and any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the equivalent embodiment of equivalent variations.But every technical solution of the present invention content that do not depart from, any simple modification, equivalent variations and the remodeling above embodiment done according to technical spirit of the present invention, still belong to the protection domain of technical solution of the present invention.
Claims (5)
1. a preparation method for hydroscopic high-molecular resin nitrogen potassium water holding controlled release fertilizer, comprises following content:
(1) be mixed with 32.5% NaOH aqueous solution 1070g;
(2) neutralization reaction: the NaOH aqueous solution preparing is splashed into 2000g purity continuously and be greater than in 99.5% vinylformic acid, carry out neutralization reaction, reaction times is 20 minutes, adds 1200g(nitrogen content >=46%) urea, 1180g(potassium oxide content >=50%) potassium sulfate; Then cool to 56-65 DEG C;
(3) copolyreaction: in the solution after neutralization reaction, add 5g methylene radical acrylamide linking agent, carrying out mixing speed is that 90-100 turns, after 10 minutes, add 15g Potassium Persulphate initiator, be warmed to 65-70 DEG C and carry out copolyreaction, temperature in reaction process is controlled at 110 DEG C-115 DEG C, and the reaction times is 15 minutes;
(4) solidify dry: reaction mixture is diverted in polymerization digestor; React mixed solution after 10-20 minute and aggregate into solid, in polymerization process, heat of polymerization makes material seasoning;
(5) pulverize: solid phase prod is ground into particle, gets product.
2.PH value is 6.3, water absorbent rate 256g/g; Nitrogen content >=20%; Potassium oxide content >=18%; Total nutrient >=38%.
3. the preparation method of above-mentioned hydroscopic high-molecular resin nitrogen potassium water holding controlled release fertilizer, the vinylformic acid using: 1.051 gram per centimeters when proportion is 20 DEG C
3, boiling point is 141.3 DEG C, flash-point is 54.5 DEG C.
4. the preparation method of above-mentioned hydroscopic high-molecular resin nitrogen potassium water holding controlled release fertilizer, comprises following content:
(1) be mixed with 32.5% NaOH aqueous solution 1090g;
(2) neutralization reaction: the NaOH aqueous solution preparing is splashed into 2000g purity continuously and be greater than in 99.5% vinylformic acid, carry out neutralization reaction, reaction times is 20 minutes, adds 1270g(nitrogen content >=46%) urea, 1100g(potassium oxide content >=50%) potassium sulfate; Then cool to 56-65 DEG C;
(3) copolyreaction: in the solution after neutralization reaction, add 5g methylene radical acrylamide linking agent, carrying out mixing speed is that 90-100 turns, after 10 minutes, add 15g Potassium Persulphate initiator, be warmed to 65-70 DEG C and carry out copolyreaction, temperature in reaction process is controlled at 110 DEG C-115 DEG C, and the reaction times is 15 minutes;
(4) solidify dry: reaction mixture is diverted in polymerization digestor; React mixed solution after 10-20 minute and aggregate into solid, in polymerization process, heat of polymerization makes material seasoning;
(5) pulverize: solid phase prod is ground into particle, gets product.
5.PH value is 6.3, water absorbent rate 236g/g; Nitrogen content >=20%; Potassium oxide content >=18%; Total nutrient >=38%;
The preparation method of above-mentioned hydroscopic high-molecular resin nitrogen potassium water holding controlled release fertilizer, the vinylformic acid using: 1.051 gram per centimeters when proportion is 20 DEG C
3, boiling point is 141.3 DEG C, flash-point is 54.5 DEG C.
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Cited By (2)
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| CN105175197A (en) * | 2015-07-15 | 2015-12-23 | 中北大学 | Water-retaining high-molecular slow-release nitrogen-potassium fertilizer and preparation method thereof |
| CN106146156A (en) * | 2016-07-01 | 2016-11-23 | 青岛鑫垚地农业科技股份有限公司 | A kind of organic-inorganic polymerization water keeping fertilizer and preparation method thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105175197A (en) * | 2015-07-15 | 2015-12-23 | 中北大学 | Water-retaining high-molecular slow-release nitrogen-potassium fertilizer and preparation method thereof |
| CN105175197B (en) * | 2015-07-15 | 2019-08-23 | 中北大学 | A kind of water-retaining type high molecular slow-release nitrogen potash fertilizer and preparation method thereof |
| CN106146156A (en) * | 2016-07-01 | 2016-11-23 | 青岛鑫垚地农业科技股份有限公司 | A kind of organic-inorganic polymerization water keeping fertilizer and preparation method thereof |
| WO2018001366A1 (en) * | 2016-07-01 | 2018-01-04 | 青岛鑫垚地农业科技股份有限公司 | Organic-inorganic polymeric water-retaining fertilizer and preparation method therefor |
| US20180354869A1 (en) * | 2016-07-01 | 2018-12-13 | Qingdao Xinyaodi Agricultural Technology Joint-Stock Co., Ltd. | Organic-inorganic polymeric water-retaining fertilizer and preparation method of the same |
| AU2017279605B2 (en) * | 2016-07-01 | 2019-07-18 | Qingdao Hezifei Biotechnology Co., Ltd. | Organic-inorganic polymeric water-retaining fertilizer and preparation method of the same |
| RU2697092C2 (en) * | 2016-07-01 | 2019-08-12 | Циндао Синьяоди Агрикалчерел Текнолоджи Джойнт-Сток Ко., Лтд. | Organic-inorganic polymer water-retaining fertilizer and method of its production |
| US10544065B2 (en) | 2016-07-01 | 2020-01-28 | Qingdao Xinyaodi Agricultural Technology Joint-Stock Co., Ltd. | Organic-inorganic polymeric water-retaining fertilizer and preparation method of the same |
| CN115417710A (en) * | 2016-07-01 | 2022-12-02 | 青岛合子肥生物科技有限公司 | Organic-inorganic polymerization water-retention fertilizer and preparation method and application thereof |
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Free format text: CORRECT: APPLICANT; FROM: QINGDAO XINYAO WATER CONSERVATION HIGH TECHNOLOGY MATERIAL CO., LTD. TO: QINGDAO XINYAODI AGRICULTURE TECHNOLOGY CO., LTD. |
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Application publication date: 20141029 |