CN101955379A - Preparation method for nitrate urea-formaldehyde fertilizer - Google Patents
Preparation method for nitrate urea-formaldehyde fertilizer Download PDFInfo
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- CN101955379A CN101955379A CN 201010268404 CN201010268404A CN101955379A CN 101955379 A CN101955379 A CN 101955379A CN 201010268404 CN201010268404 CN 201010268404 CN 201010268404 A CN201010268404 A CN 201010268404A CN 101955379 A CN101955379 A CN 101955379A
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Abstract
The invention discloses a preparation method for nitrate urea-formaldehyde fertilizer. The method comprises the following steps of: adding hot water in a kettle, rising temperature to 65 DEG C, adding urea, stirring and dissolving, adjusting PH value to 8.6 to 8.8 through 20% NaOH, adding formaldehyde with a weight ratio between formaldehyde and urea of 1:1.8, rising temperature to 85 DEG C, keeping temperature for 20 to 30 min, adding nitrate nitrogenous fertilizer in a backing material of a granulator according to a calculated formula NPK raw materials at a constant temperature about 80 DEG C, dehydrating to make grains, drying, cooling and screening to acquire the finished product. The nitrate urea-formaldehyde fertilizer contains urea, formaldehyde, monoammonium phosphate, potassium sulfate and ammonium nitrate. The invention has the advantages of convenient preparation, low cost, high nitrogen content, quick-acting and slow-acting functions of supplying nitrogen element, decreased pouring and volatilized loss, promoted use ratio, and the like.
Description
Technical field
The invention belongs to the agriculture production technical field of fertilizer, a kind of specifically preparation method of nitre attitude urea formaldehyde fertilizer.
Background technology
Urea formaldehyde fertilizer is meant the urea formaldehyde slow-release nitrogen fertilizer, also is referred to as MU, UF.Mainly be the slow release of control nitrogen element, prevent loss of nitrogenous fertilizer, improve the efficient of nitrogenous fertilizer.
Urea formaldehyde fertilizer is a kind of slow release fertilizer of chemosynthesis manufactured, is that urea and formalin carry out the condensation reaction generation.
Urea formaldehyde is the pioneer product of slow release fertilizer, and nineteen fifty-five promptly realizes commercially producing.In the world, Japan, the U.S., Europe etc. produce single urea formaldehyde and urea formaldehyde NPK composite fertilizer two series products according to market demand.Initial stage is used for " noble plants " such as lawn, flowers because price is more expensive more, develops unhappy.20 th century later 20 years, Japan increased very fast, and tempo has reached 170%.China's urea formaldehyde fertilizer research and development and industrialization are carried out early, but are comparatively fast developed in the long term, and a small amount of small production equipment only distributes in some areas.Shandong Shi Beimei fertilizer development company limited is found on August 8th, 2006, and the company leader decision maker are certain about China and have the sufficient condition of producing urea formaldehyde fertilizer, and is feasible on China's popularization urea formaldehyde fertilizer technology, also can accomplish economically rationally.Huge fund is introduced urea formaldehyde production technique for fertilizer and equipment, employs by offering a high salary the agrochemistry expert and explores innovation, complies with the increment sustained-controll-release fertiliser that high utilization rate is produced in market development, for the Chinese development high-efficiency agriculture contributes.But, utilize urea to mix with formalin when producing gonorrhoea, add acid curing agent, though the urea formaldehyde fertilizer made from kneader dehydration granulation under heating has the effect of slow control, but, do not reach farm crop in the requirement that needs most the nitrogen nutrient growth phase.
Summary of the invention
Purpose of the present invention just provides a kind of easy to prepare, and cost is low, nitrogen content is high, the nitrogen supply phase has quick-acting and slow, and leaching loss, volatilization reduce and improve and the preparation method of the nitre attitude urea formaldehyde fertilizer of advantages such as utilization ratio.
The mixture that the dipolymer of the monomethylol urea that the urea formaldehyde product of former urea formaldehyde production technique is not waited by molecular weight, dimethylolurea, methene urea etc. and oligomer are formed.Compound in the typical urea formaldehyde product is divided into 3 kinds of components: 1. cold-water solution component N (CWSN, 25 ℃) mainly contains urea, dipolymer and short chain polymer, and the N in this component can think quick-acting to slow; 2. hot water dissolving's component N (HWSN, 100 ℃) is methene urea and medium chain polymkeric substance, and the N in this component can slowly be discharged in the soil; 3. (HWIN) is methene urea and long chain polymer, in soil, decompose extremely slow, this component N non-activity in soil.Can determine activity index value AI=(CWIN-HWIN)/(CWIN * 100) of this compounds according to above-mentioned definition.The estimated value (about 6 months) that AI provides the nitrogen of hot water dissolving's component in soil to discharge.The urea formaldehyde fertilizer of under this technology, producing under many circumstances, the N in hot water dissolving's component and the hot water non-soluble composition has slowly discharged long-acting, it is quick-acting to slows to have only N in the cold-water solution component to think.Fertilizer can not provide enough nitrogens to crop at the plant growth initial stage, and the quick-acting effects of fertilizer are not too obvious, can only a kind of at last reasonable long-acting fertilizer.
The prescription NPK nitrogen phosphorus potassium of former technology is that 20-10-15 is: Repone K 250Kg, monoammonium phosphate 225Kg, urea 350Kg, filler 175Kg.
The preparation method of nitre attitude urea formaldehyde fertilizer of the present invention is exactly the production technique that changes urea formaldehyde fertilizer, after changing original urea and formalin mixing earlier, adds other raw materials again, makes with kneader dehydration granulation under heating.
Technical scheme of the present invention is achieved in that a kind of preparation method of nitre attitude urea formaldehyde fertilizer; it is characterized in that: it is realized by following preparation method; at first in reactor, add hot water; be warming up to 65 ℃; add urea; transfer p H value to 8.6～8.8 with 20%NaOH after the stirring and dissolving; add formaldehyde again; formaldehyde; weight of urea part ratio is 1: 1.8; temperature rises to 85 ℃, and constant temperature 20～30 minutes is incubated then to spray in the tablets press machine bed material that calculates prescription NPK raw material about 80 ℃ and adds nitrate fertilizer; granulating is made in dehydration, dry cooling screening back finished product.
The fertilizer nitrogen changes into the tablets press bed material from simple use urea and adds nitrate fertilizer, and the N element of the nitre attitude in the urea formaldehyde sustained-controll-release fertiliser of production was discharged rapidly at the crop fertilization initial stage, really reaches the quick-acting long lasting purposes that add.Nitric nitrogen is faster than other nitrogen release rate
The urea of described adding is nitrogenous 46% urea.
The formaldehyde of described adding is to contain≤40% formaldehyde.
Described adding for containing 52% monoammonium phosphate (NH4H2PO4).
Described adding for to contain 〉=98% Repone K (KCI).
The N element of nitre attitude is for containing 〉=contain 〉=99.5% ammonium nitrate (NH4NO3).
The filler of described adding is a clay.
The described nitrate fertilizer that adds in the tablets press bed material is to contain 〉=99.5% ammonium nitrate (NH4NO3).
A kind of nitre attitude urea formaldehyde fertilizer of the present invention, it is characterized in that: it is to be to spray into that to calculate prescription NPK nitrogen phosphorus potassium be 20-10-15 beyond the nitrogen in removing urea formaldehyde by the technology after improving, form formaldehyde 30Kg, urea 225Kg, monoammonium phosphate 225Kg, Repone K 250Kg, ammonium nitrate 225Kg, clay 75Kg by the raw material of following weight part.
The nitrogen of the nitre attitude urea formaldehyde fertilizer of technology manufacturing of the present invention has quick-acting and effect slow.
Figure of description
Diagram 1 is that the nitrogen phosphorus potassium of former urea formaldehyde explained hereafter was at 5-180 days Different Nitrogen Concentration supply curves.
Diagram 2 for the nitrogen phosphorus potassium of the nitre attitude urea formaldehyde explained hereafter after improving at 5-180 days Different Nitrogen Concentration supply curves.
Embodiment
For showing that the N element in the nitre attitude urea formaldehyde fertilizer of the present invention discharges the effect of quick-acting and slow, get technology after the improvement and be and spray into that to calculate prescription NPK nitrogen phosphorus potassium be 20-10-15 beyond the nitrogen in removing urea formaldehyde, form by the raw material of following weight part, formaldehyde 30kg (containing formaldehyde≤40%), urea 225Kg (nitrogenous 46%), monoammonium phosphate 225Kg (containing NH4H2PO4), Repone K 250Kg, (contain 〉=98%KCI) ammonium nitrate 225Kg (containing NH4NO3 〉=99.5%), filler 75Kg.
The nitrogen of the nitre attitude urea formaldehyde fertilizer of technology manufacturing of the present invention has quick-acting and effect slow.
In order to show the situation that crop nutrition content demand and fertilizer nutrient discharge more intuitively, through the expert to the corn fertilizer experimental result following (and following diagram 1 is made in computational analysis) that to use former urea formaldehyde technology nitrogen phosphorus potassium prescription be 20-10-15:
The expert does the base fertilizer fertilising in the experiment field, with 40 kilograms of/mu former urea formaldehyde technology nitrogen phosphorus potassium prescriptions is the fertilizer of 20-10-15, to corn from plant to receive after respectively the 5th, 10,20,30,40,50,60,70,80,90,100,120,150,180 day to soil in Different Nitrogen Concentration chemically examine and be respectively 9%, 19.5%, 31%, 37.8%, 38%, 35.3%, 32%, 31.2%, 29.7%, 28.4%, 26.4%, 22%, 17.9%, 9.3%.Corn requires high to the absorption to nitrogen in the 40th day at early growth period the 10th, and the nitrogen of fertilizer release does not at this moment catch up with.The desirable Different Nitrogen Concentration supply curve of corn is to estimate according to the component analysis that corn growing season absorbs nitrogen.
The desirable nutrient supply curve of crop in the diagram can make the desirable Different Nitrogen Concentration supply curve of corn into, and the fertilizer nutrient supply curve makes fertilizer nitrogen supply curve into.
With the nitrogen nutrient is example: corn is from emerging to jointing, absorbed nitrogen 7.5% in the time of five days, absorb nitrogen 21.3% ten days the time, absorbed nitrogen 46.35% 20 days time the, absorbed nitrogen 43.2% 30 days time the, absorbed nitrogen 38.6% 40 days time the, absorbed nitrogen 33.2% 50 days time the, absorbed nitrogen 31.2% 60 days time the, absorbed nitrogen 30.9% 70 days time the, absorbed nitrogen 29.3% 80 days time the, absorbed nitrogen 28.0% 90 days time the, absorbed nitrogen 27.85% 100 days the time.
Figure of description
Diagram 1 is that the nitrogen phosphorus potassium of former urea formaldehyde explained hereafter was at 5-180 days Different Nitrogen Concentration supply curves.
Diagram 2 for the nitrogen phosphorus potassium of the nitre attitude urea formaldehyde explained hereafter after improving at 5-180 days Different Nitrogen Concentration supply curves.
Through the expert corn being applied fertilizer with base fertilizer, is the nitre attitude urea formaldehyde fertilizer experimental result following (and following diagram 2 is made in computational analysis) of 20-10-15 with 40 kilograms of/mu nitrogen phosphorus potassium prescriptions of using after the process modification:
The expert the experiment field to corn from plant to receive after respectively the 5th, 10,20,30,40,50,60,70,80,90,100,120,150,180 day to soil in Different Nitrogen Concentration chemically examine and be respectively 29.5%, 46.2%, 53%, 48.6%, 41.7%, 37%, 32.1%, 29%, 27.9%, 27.8%, 27.6%, 24.7%, 18.2%, 10.4%.
With the nitrogen nutrient be the example corn from emerging to jointing, absorbed nitrogen 7.5% in the time of five days; Absorb nitrogen 21.3% in the time of ten days; Absorbed nitrogen 46.35% in the time of 20 days; Absorbed nitrogen 43.2% in the time of 30 days; Absorbed nitrogen 38.6% in the time of 40 days; Absorbed nitrogen 33.2% in the time of 50 days; Absorbed nitrogen 31.2% in the time of 60 days; Absorbed nitrogen 30.9% in the time of 70 days; Absorbed nitrogen 29.3% in the time of 80 days; Absorbed nitrogen 28.0% in the time of 90 days; Absorbed nitrogen 27.85% in the time of 100 days.
The desirable nutrient supply curve of crop in the diagram can make the desirable Different Nitrogen Concentration supply curve of corn into, and the fertilizer nutrient supply curve makes fertilizer nitrogen supply curve into.
From above test as can be seen, the corn field of using nitrogen phosphorus potassium prescription after the process modification and be the nitre attitude urea formaldehyde fertilizer of 20-10-15 and use former urea formaldehyde technology nitrogen phosphorus potassium prescription the fertilizer that is 20-10-15 respectively in 5,10,20,30,40,50,60,70,80,90,100 days soil the Different Nitrogen Concentration burst size be different, and corn absorbed nitrogen 7.5% in the time of five days; Absorb nitrogen 21.3% in the time of ten days; Absorbed nitrogen 46.35% in the time of 20 days; Absorbed nitrogen 43.2% in the time of 30 days; Absorbed nitrogen 38.6% in the time of 40 days; Absorbed nitrogen 33.2% in the time of 50 days; Absorbed nitrogen 31.2% in the time of 60 days; Absorbed nitrogen 30.9% in the time of 70 days; Absorbed nitrogen 29.3% in the time of 80 days; Absorbed nitrogen 28.0% in the time of 90 days; The nitrogen nutrient that 27.85% each growth period phase of absorbed nitrogen needs in the time of 100 days is the same.Using the nitrogen nutrient that former urea formaldehyde technology nitrogen phosphorus potassium prescription emits at 5,10,20,30,40,50,60,70,80,90,100 days for the fertilizer of 20-10-15 is 9%, 19.5%, 31%, 37.8%, 38%, 35.3%, 32%, 31.2%, 29.7%, 28.4%, 26.4% corn absorbed nitrogen 7.5% when the expense of 5,10,20,30,40,50,60,70,80,90,100 days each growth period phases is five days; Absorb nitrogen 21.3% in the time of ten days; Absorbed nitrogen 46.35% in the time of 20 days; Absorbed nitrogen 43.2% in the time of 30 days; Absorbed nitrogen 38.6% in the time of 40 days; Absorbed nitrogen 33.2% in the time of 50 days; Absorbed nitrogen 31.2% in the time of 60 days; Absorbed nitrogen 30.9% in the time of 70 days; Absorbed nitrogen 29.3% in the time of 80 days; Absorbed nitrogen 28.0% in the time of 90 days; Absorbed nitrogen 27.85% in the time of 100 days, and not enough corn is in the expense of 5,10,20,30,40,50,60,70,80,90,100 days each growth period phases, because nutrient supply is untimely, the corn growing way is short and small, and leaf is thin, and root system is undeveloped; Using nitrogen phosphorus potassium prescription after the process modification and be the nitrogen nutrient that the nitre attitude urea formaldehyde fertilizer of 20-10-15 discharged in 5,10,20,30,40,50,60,70,80,90,100 days is 29.5%, 46.2%, 53%, 48.6%, 41.7%, 37%, 32.1%, 29%, 27.9%, 27.8%, 27.6%, and corn absorbed nitrogen 7.5% in the time of five days; Absorb nitrogen 21.3% in the time of ten days; Absorbed nitrogen 46.35% in the time of 20 days; Absorbed nitrogen 43.2% in the time of 30 days; Absorbed nitrogen 38.6% in the time of 40 days; Absorbed nitrogen 33.2% in the time of 50 days; Absorbed nitrogen 31.2% in the time of 60 days; Absorbed nitrogen 30.9% in the time of 70 days; Absorbed nitrogen 29.3% in the time of 80 days; Absorbed nitrogen 28.0% in the time of 90 days; Absorbed nitrogen 27.85% in the time of 100 days, use nitrogen nutrient that the nitrogen phosphorus potassium prescription after the process modification discharged for the nitre attitude urea formaldehyde fertilizer of 20-10-15 in 5,10,20,30,40,50,60,70,80,90,100 days and satisfied the expense of corn 5,10,20,30,40,50,60,70,80,90,100 days each growth period phases, because nutrient supply is timely, the corn growing way is vigorous, leaf is thick, well developed root system.Thus, using nitrogen phosphorus potassium prescription after the process modification is that to be better than using former urea formaldehyde technology nitrogen phosphorus potassium prescription be the effect of the fertilizer of 20-10-15 for the quick-acting effects to slow of nitre attitude urea formaldehyde fertilizer N element of 20-10-15.
Claims (3)
1. the preparation method of a nitre attitude urea formaldehyde fertilizer; it is characterized in that: it is realized by following preparation method; at first in reactor, add hot water; be warming up to 65 ℃; add urea; use 20%NaOH adjust pH to 8.6～8.8 after the stirring and dissolving; add formaldehyde again; formaldehyde, weight of urea part ratio are 1: 1.8; temperature rises to 85 ℃, and constant temperature 20～30 minutes is incubated then to spray in the tablets press machine bed material that calculates prescription NPK raw material about 80 ℃ and adds nitrate fertilizer; granulating is made in dehydration, dry cooling screening back finished product.
2. the preparation method of a kind of nitre attitude urea formaldehyde fertilizer according to claim 1 is characterized in that: adding nitrate fertilizer in tablets press machine bed material is ammonium nitrate (containing NH4NO3 〉=99.5%) 225Kg.
3. the preparation method of a kind of nitre attitude urea formaldehyde fertilizer according to claim 1; it is characterized in that: insulation sprays into to calculate in the tablets press machine bed material that prescription NPK raw material is and adds nitrate fertilizer about 80 ℃ then; it is to be made by the raw material of following weight part, urea 225Kg (nitrogenous 46%), formaldehyde 30Kg (containing formaldehyde≤40%), monoammonium phosphate 225Kg (containing NH4H2PO4), Repone K 250Kg, ammonium nitrate 225Kg (containing NH4NO3 〉=99.5%), clay 75Kg.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102491858A (en) * | 2011-12-20 | 2012-06-13 | 上海化工研究院 | Method for manufacturing urea-based nitrate slow-releasing compound fertilizer |
| CN102815981A (en) * | 2012-09-21 | 2012-12-12 | 史丹利化肥股份有限公司 | Polymorphic controlled-release fertilizer and preparation method thereof |
| CN103319237A (en) * | 2013-06-19 | 2013-09-25 | 山东天山丰耘生态肥业有限公司 | Method for producing three-in-one coated controlled release fertilizer |
| CN103819278A (en) * | 2013-05-08 | 2014-05-28 | 桂林集琦生化有限公司 | High-strength urea formaldehyde slow release fertilizer and preparation method thereof |
| CN104109054A (en) * | 2013-04-18 | 2014-10-22 | 云中英 | Production process and production device of urea formaldehyde slow-release synergistic fertilizer |
| CN104496706A (en) * | 2015-01-09 | 2015-04-08 | 山东史贝美肥料股份有限公司 | Ammonium-aldehyde dually-controlled compound fertilizer and preparation method thereof |
| CN104725141A (en) * | 2015-03-25 | 2015-06-24 | 青岛海力源生物科技有限公司 | Humic acid fertilizer synergist with ammonia volatilization inhibition effect and preparation method thereof |
| CN109704853A (en) * | 2018-12-29 | 2019-05-03 | 中化农业（临沂）研发中心有限公司 | Clear liquid fertilizer and preparation method thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102491858A (en) * | 2011-12-20 | 2012-06-13 | 上海化工研究院 | Method for manufacturing urea-based nitrate slow-releasing compound fertilizer |
| CN102815981A (en) * | 2012-09-21 | 2012-12-12 | 史丹利化肥股份有限公司 | Polymorphic controlled-release fertilizer and preparation method thereof |
| CN102815981B (en) * | 2012-09-21 | 2014-07-16 | 史丹利化肥股份有限公司 | Polymorphic controlled-release fertilizer and preparation method thereof |
| CN104109054A (en) * | 2013-04-18 | 2014-10-22 | 云中英 | Production process and production device of urea formaldehyde slow-release synergistic fertilizer |
| CN103819278A (en) * | 2013-05-08 | 2014-05-28 | 桂林集琦生化有限公司 | High-strength urea formaldehyde slow release fertilizer and preparation method thereof |
| CN103819278B (en) * | 2013-05-08 | 2016-01-27 | 桂林集琦生化有限公司 | A kind of high strength urea aldehyde slow-release fertilizer and preparation method thereof |
| CN103319237A (en) * | 2013-06-19 | 2013-09-25 | 山东天山丰耘生态肥业有限公司 | Method for producing three-in-one coated controlled release fertilizer |
| CN104496706A (en) * | 2015-01-09 | 2015-04-08 | 山东史贝美肥料股份有限公司 | Ammonium-aldehyde dually-controlled compound fertilizer and preparation method thereof |
| CN104496706B (en) * | 2015-01-09 | 2018-05-22 | 山东史贝美肥料股份有限公司 | A kind of ammonium aldehyde dual control composite fertilizer and preparation method thereof |
| CN104725141A (en) * | 2015-03-25 | 2015-06-24 | 青岛海力源生物科技有限公司 | Humic acid fertilizer synergist with ammonia volatilization inhibition effect and preparation method thereof |
| CN109704853A (en) * | 2018-12-29 | 2019-05-03 | 中化农业（临沂）研发中心有限公司 | Clear liquid fertilizer and preparation method thereof |
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Application publication date: 20110126 |