CN104310340B - Method for preparing ammonium dihydrogen phosphate and preparing special fertilizer for beet as byproduct - Google Patents
Method for preparing ammonium dihydrogen phosphate and preparing special fertilizer for beet as byproduct Download PDFInfo
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- CN104310340B CN104310340B CN201410478840.9A CN201410478840A CN104310340B CN 104310340 B CN104310340 B CN 104310340B CN 201410478840 A CN201410478840 A CN 201410478840A CN 104310340 B CN104310340 B CN 104310340B
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Abstract
The invention relates to the technical field of chemical industry, and especially relates to a method for preparing ammonium dihydrogen phosphate and preparing a special fertilizer for beet as a byproduct. The temperature and other coefficients of the preparation of ammonium dihydrogen phosphate from phosphoric acid through a wet process are changed, so the purity of the ammonium dihydrogen phosphate product is improved, and the N, P and K compounded fertilizer is produced. The method improves the purity of ammonium dihydrogen phosphate, and the produced special fertilizer for beet has high absorptivity, can meet the nutrition needs of beet in all stages of the growth period of beet, greatly increases the output of beet, and is an efficient compound fertilizer.
Description
Technical field
The present invention relates to chemical technology field, particularly relate to a kind of production preparing ammonium dihydrogen phosphate by-product Radix Betae special fertilizer
Method.
Background technology
Radix Betae, (Beta vulgaris), have another name called dish, biennial herb plant, originate in western European and edge, south
Sea, is transplanted to Spain from Sweden, is a main sugar source beyond the Caulis Sacchari sinensis of the torrid zone.The pigment content of beet root is the richest
Richness, primary pigments is referred to as beet red (Betalains), including red Betacyanins and the Betaxanthins of yellow, many
The beet root of number kind contains the red Betacyanin of more amount, and the beet root of every 100 g contains the color of up to 200 milligrams
Element, is good pigment source.
Seed manure used by current domestic Radix Betae is substantially Diammonium phosphate (DAP), and this is also the most commonly used seed manure.It
Main component be phosphorus pentoxide (P2O5) 46%, nitrogen (N) 18%.Owing to different crops is different to nutrient absorption law,
Sensitivity is different, thus Diammonium phosphate (DAP) to have used nitrogen content in many problems, such as Diammonium phosphate (DAP) on Radix Betae higher, and
Radix Betae kind bud is more weak, often occurs ammonia (NH3) to burn kind of a bud phenomenon in soil, and the lighter is short of seedling disconnected ridge, severe one large area
Do not emerge.
In Diammonium phosphate (DAP), nitrogen content is high has facilitation to beet seedling stage growth, and particularly nitrogen metabolism vigorous growth center is held
Continuous part on the ground, this situation is unfavorable for that Radix Betae young root stretches to underground, and then Sugarbeet Growth occurs in that root deformation is short, root head
Increase Sugar Content to decline.Sugar beet is to utilize beet root, and above-mentioned phenomenon directly affects sugar refinery economic benefit.
Being concentrated mainly on northeast, North China, the Northwest in China's Radix Betae producing region at present, these areas are all terra calcis
Earth, owing in calacareous soil, calcium and water-soluble phosphorus have fixation, makes effectiveness phosphoric acid-calcium convert and difficult is utilized by Radix Betae
OCP.Therefore, the phosphorus in Diammonium phosphate (DAP) is fixed by the calcium in soil in a large number, and utilization rate is the lowest by generally 10～20%.
Although therefore in Diammonium phosphate (DAP), content is the highest, but its effect is unsatisfactory, and enriches Diammonium phosphate (DAP) and there will be again kind of burning
The danger of bud.Through the test of Diammonium phosphate (DAP) dose for many years, enrich Diammonium phosphate (DAP) not volume increase, increase sugar effect, otherwise, with
Diammonium phosphate (DAP) consumption to increase, sugar content falls progressively.
During producing ammonium dihydrogen phosphate, the purity of ammonium dihydrogen phosphate is the highest, possibly together with not separating out in a large number in filtrate
Phosphoamide, H2PO4 -、HPO4 2-、PO4 3-Deng material, the researcher of the present invention is from substantial amounts of prior art literature and for many years
Explore and research, and the tradition component content of Radix Betae special fertilizer and the absorbing state of Radix Betae are studied, effectively inquire into
Go out from the filtrate of Wet-process Phosphoric Acid Production ammonium dihydrogen phosphate, produce Radix Betae special fertilizer, solve Wet-process Phosphoric Acid Production ammonium dihydrogen phosphate
Purity is the highest, and in filtrate, effective ingredient such as cannot utilize at the problem, and the absorbance of this special fertilizer is good simultaneously and the effect of realizing controlled-release,
In domestic fertilizer production, have no report.
Summary of the invention
For above technical problem, the invention provides a kind of producer preparing ammonium dihydrogen phosphate by-product Radix Betae special fertilizer
Method, by unique process production design, improves the purity of ammonium dihydrogen phosphate, makes full use of wet process phosphoric acid for preparing biphosphate simultaneously
The effective ingredient of ammonium, produces out the Radix Betae special fertilizer of applicable Sugarbeet Growth.
The present invention is achieved by the following technical solutions:
A kind of production method preparing ammonium dihydrogen phosphate by-product Radix Betae special fertilizer that the present invention provides, mainly includes following step
Rapid:
1) use phosphoric acid to mix with phosphoamide, and be that 3～8 DEG C/min is warming up to 160 DEG C from 80 DEG C with programming rate, stirring
Reaction 4-5h, isolated intermediate, then intermediate is added in ammonia spirit, temperature is adjusted to 50～65 DEG C, stirring reaction 2～
3h, after reaction terminates, carries out crystallisation by cooling filtration treatment, and crystallization temperature is 30～35 DEG C, makes filtrate follow in cooler crystallizer
Ring crystallization treatment, it is thus achieved that filter cake be ammonium dihydrogen phosphate product, detection filtrate in component content；
2) in filtrate, add potassium hydroxide solution and phosphoric acid solution, adjust middle pH value and nitrogen, phosphorus, the potassium content of filtrate,
Working as filtrate, pH value is 3.5～4, and the content of nitrogen component is 20-25%, phosphorus composition content is 4-8%, potassium component content is 10-
When 15%, stopping adding potassium hydroxide solution and phosphoric acid solution, add formalin the most in the solution, temperature rises to 50～65
DEG C, stirring reaction 2.5～4h；
3) in filtrate, add the trace element such as the moderate-element such as calcium, magnesium and Borax, zinc sulfate, manganese sulfate, cobalt nitrate, stir
Mix reaction 1～1.5h；
4) by step 3) in the solution that obtains be cooled to 15～20 DEG C, carry out crystallization treatment, obtain at the beginning of compound state compound fertilizer
Finished product, described compound state compound fertilizer just finished product containsThe potassium phosphate compound fertilizer of root.
5) compound state compound fertilizer just finished product is carried out pelletize, in the environment of 45～55 DEG C, then dry that to make Radix Betae special
Fertile.
What phosphoric acid mixed with phosphoamide is (1.2-1.5) according to mol ratio: 1.
The intermediate of described addition and the mol ratio of ammonia are 1:(1.2～1.4).
The concentration of described potassium hydroxide solution is 10～15%.
The concentration of described phosphoric acid solution is 10～15%.
Described crystallization treatment is: when the content of the nitrogen component in compound state compound fertilizer just finished product is 18-23%, phosphorus composition
When content is 3-6%, potassium component content is 8-13%, stop crystallization.
Described compound state compound fertilizer just finished product rich inWith
Realizing controlled-release fertile, whereinWithRub
That ratio is 1:(2～4).
In the present invention, by phosphoamide and phosphoric acid at 80 DEG C, and in the environment of being warming up to 160 DEG C with the speed of 5 DEG C/min
Reaction, generates urea phosphate, and being stepped up along with temperature, and then makes the coordinate bond dialysis between urea phosphate form two kinds
Ion like material, be exactly i.e.WithWhenIon is in phosphoric acid environment, it will with
Phosphoric acid is close, and then carries out ionic polymerization under the temperature environment when urea phosphate coordinate bond dialysis so that
Ion generates with phosphoric acidIntermediate-ion, makes containing substantial amounts of dihydrogen phosphate in solution simultaneously,
When adding ammonia, dihydrogen phosphate and potassium ion react generation ammonium dihydrogen phosphate, and in succession reach saturated；When separating out NH4·
H2PO4After crystal, containing substantial amounts of in filtrateRoot, to filtrate adds potassium hydroxide solution,
When potassium content excess, it will react with the ammonium radical ion in intermediate-ion, further make intermediate-ion chelate intoIntermediate-ion, and with positive charge, so when solution participates in other electronegative from
Nutritional labeling when son or compound, it will form compound salt with this ion, in the abundantest product.
Meanwhile, phosphoamide is at pH in the case of the acidity of 3.5～4.0, and phosphoamide can react with formalin, generates urea aldehyde
Series of productsOrEven
Longer chemical chain,Reaction can be continued with phosphoamide and formaldehyde in the case of acidity
GenerateSimultaneously?
Continue in the case of acidity to react with phosphoamide and formaldehyde, so controlling its response time 2.5～4h, it is ensured that in solutionWithMol ratio be 1:
(2～4),Or
Deng urea aldehyde series of products after fertilising, under the effect of microorganism, N, the C element being easily absorbed by plants can be discharged,
The chain length of its urea aldehyde is the longest, and chain needs the time ruptured the longest, and the time producing fertilizer efficiency can discharge after a certain time, can
To reach the effect of slow release generally,The release fertilizer efficiency time be 0～40
My god,The release fertilizer efficiency time be 40～80 days.
The beneficial effects of the present invention is:
Compared with prior art, there is following characteristics in the present invention:
1. rich in carbon amide solution in the filtrate of conventional wet lay phosphoric acid ammonium dihydrogen phosphate, phosphoamide mutually synthermal
Under dissolubility relatively large, isolated phosphoamide crystal is rich in NH4·H2PO4In other crystal, entered cooling simultaneously and separated out
Possibly together with substantial amounts of phosphoamide, H in filtrate after phosphoamide crystal2PO4 -、HPO4 2-、PO4 3-Utilize Deng not operatively, the present invention
The temperature of wet process phosphoric acid for preparing ammonium dihydrogen phosphate is regulated to 80～160 DEG C, and heats up from 80 DEG C to 160 with the speed of 5 DEG C/min
React in the environment of DEG C, not only make the ammonium dihydrogen phosphate product purity of precipitation reach more than 98%, to filtrate adds Strong oxdiative
After potassium solution, filtrate also generatesCation, to filtrate crystallisation separate out generate change
When conjunction state Chemical Mixed Fertilizer goes out finished product, it is ensured that compound state Chemical Mixed Fertilizer goes out in finished productIntermediate-ion
And dihydrogen phosphate, and between C and O, forming coordinate bond, this intermediate-ion can be formed with centering element compound chelating
Multielement intermediate-ion, and then can continue to the compound electronegative with other or ion formation chelate, improve double salt
Middle constituent content, and then the nutrient content in the double salt that this ion exists can be adjusted, meanwhile, this chelate can carry out again water
Solve and by crop, and then effectively for a long time can provide fertilizer efficiency for crop, meanwhile, in conjunction with element in the solution that this ion is existed
The mensuration of content, and then adjust each constituent content when double salt is formed, dry and obtain compound state double salt compound fertilizer, its absorbance pole
Good, reduce Radix Betae planting cost and improve Radix Betae quality；
2. phosphoamide composition containing part in filtrate, adds formalin, in acid condition and certain pressure intensity and temperature
Under degree, generateOrDeng urea
Aldehyde series compound fertilizer, can make this Radix Betae special fertilizer reach the effect of realizing controlled-release；
3. by effective absorbtivity of n-p-k element is examined by the constituent content in Radix Betae special fertilizer and Radix Betae
Cls analysis, and the constituent content in production process is adjusted and arranges in pairs or groups so that being combined of the compound state prepared
The fertile demand that can meet crop to greatest extent, and reduce in composite heat transfer because of element mismatch, the cost caused
Too high, further avoid too much element to put among soil, cause the solidification of compound fertilizer to pollute environment.
Detailed description of the invention
Below in conjunction with specific embodiment, the concrete technical scheme of the present invention is described in detail.
Principle illustrates:
The present invention carries out research and discussion by the mechanism reacting phosphoric acid and phosphoamide, and combines prior art literature
Solution arrives, and phosphoric acid and phosphoamide react generation urea phosphate, and its molecular formula is: CO (NH2)2.H3PO4, in the environment of higher temperature,
Chemical bond meeting dialysis between H and O in phosphoric acid, hydrion is combined with phosphoamide and forms the ionic state containing positive charge so that
Urea phosphate forms the ion double salt that a kind of positive and negative charge attracts mutually, its mechanism structural response following expression: CO (NH2)2.H3PO4
→(H2PO4)-.(H2NCONH3)+
Further, urea phosphate ion double salt phosphoric acid exist in the environment of, (H therein2NCONH3)+Cation and phosphorus
Acid is close, forms the intermediate-ion of C → O coordinate bond, is (CO5PN2H8)+, and then make in urea phosphate intermediate containing a large amount of
(H2PO4)-(CO5PN2H8)+Ion, when adding excessive and appropriate potassium ion, dihydrogen phosphate is formed with potassium ion
Ammonium dihydrogen phosphate crystal is precipitated, unnecessary potassium ion and (CO5PN2H8)+Ionic reaction, and displace part NH4 +So that molten
Containing (CO in liquid5PNH4K)+Double salt ion, and analyzed and control the content of N in solution, P, K element by detection, in heating
It is dried and can be prepared by containing N, P, the compound state compound fertilizer of K element.
Its concrete reaction principle will carry out further instruction by following reaction structure formula and reaction mechanism:
Reaction equation one:
CO(NH2)2+H3PO4→CO(NH2)2.H3PO4
Reaction equation two:
Reaction equation three:
Wherein, the dotted line between carbon atom and oxygen atom represents and there is coordinate bond between C atom and O atom.
When adding ammonia, dihydrogen phosphate and potassium ion react generation ammonium dihydrogen phosphate, and in succession reach saturated；Work as analysis
Go out NH4·H2PO4After crystal, containing substantial amounts of in filtrateRoot, to adding hydroxide in filtrate
Potassium solution, when potassium content excess, it will react with the ammonium radical ion in intermediate-ion.
Reaction equation four:
Wherein, the dotted line between carbon atom and oxygen atom represents and there is coordinate bond between C atom and O atom.
In the present invention, phosphoamide and formaldehyde are under being 3.5～4.0 alkaline case at pH value, and temperature is 50～65 DEG C and can produce
Below reaction:
Reaction equation five
Reaction equation six
Generate urea aldehyde series of productsOrVery
To longer chemical chain,Reaction can be continued with phosphoamide and formaldehyde in the case of acidity
GenerateSimultaneouslyIn acid
Continue under implementations to react with phosphoamide and formaldehyde, so controlling its response time 2.5～4h, it is ensured that in solutionWithMol ratio be 1:(2～4),OrDeng
Urea aldehyde series of products, after fertilising, under the effect of microorganism, can discharge N, the C element being easily absorbed by plants, its
The chain length of urea aldehyde is the longest, and chain needs the time ruptured the longest, and the time producing fertilizer efficiency can discharge after a certain time, permissible
Reach the effect of slow release generally,The release fertilizer efficiency time be 0～40 day,The release fertilizer efficiency time be 40～80 days.
Noun illustrates:
Urea phosphate (Ureaphosphate, UP), No. CAS is 4861-19-2, and molecular formula is CH7N2O5P, is represented by CO
(NH2)2·H3PO4:
Being a kind of fine chemical product being widely used in the fields such as animal husbandry, industry, agricultural, its solid is white crystals
Or crystalline powder, soluble in water and alcohol, insoluble in ethers, toluene and carbon tetrachloride, aqueous solution is acidity, starts point time melted
Solve and release carbon dioxide and ammonia.
Embodiment one
A kind of production method preparing ammonium dihydrogen phosphate by-product Radix Betae special fertilizer that the present embodiment provides, mainly includes following
Step:
1) using phosphoric acid to mix with phosphoamide, what phosphoric acid mixed with phosphoamide is 1.2:1 according to mol ratio, and with the speed that heats up
Degree is that 3～8 DEG C/min is warming up to 160 DEG C from 80 DEG C, stirring reaction 4-5h, isolated intermediate, then intermediate is added ammonia
In aqueous solution, described intermediate is 1:1.4 with the mol ratio of ammonia, and temperature is adjusted to 50～65 DEG C, stirring reaction 2～3h, instead
After should terminating, carrying out crystallisation by cooling filtration treatment, crystallization temperature is 30～35 DEG C, makes filtrate circulation crystallization in cooler crystallizer
Process, it is thus achieved that filter cake be ammonium dihydrogen phosphate product, detection filtrate in component content；
2) in filtrate, add potassium hydroxide solution and phosphoric acid solution, adjust middle pH value and nitrogen, phosphorus, the potassium content of filtrate,
The concentration of described potassium hydroxide solution is 10%, and the concentration of described phosphoric acid solution is 15%, when filtrate pH value is 3.5～4,
When the content of nitrogen component is 20-25%, phosphorus composition content is 4-8%, potassium component content is 10-15%, stop adding hydroxide
Potassium solution and phosphoric acid solution, add formalin the most in the solution, and temperature rises to 50～65 DEG C, stirring reaction 2.5h；
3) in filtrate, add the trace element such as the moderate-element such as calcium, magnesium and Borax, zinc sulfate, manganese sulfate, cobalt nitrate, stir
Mix reaction 1～1.5h；
4) by step 3) in the solution that obtains be cooled to 15～20 DEG C, carry out crystallization treatment, obtain at the beginning of compound state compound fertilizer
Finished product, when the content of the nitrogen component in compound state compound fertilizer just finished product be 18%, phosphorus composition content be 6%, potassium component content be
When 8%, stop crystallization.
5) compound state compound fertilizer just finished product is carried out pelletize, in the environment of 45～55 DEG C, then dry that to make Radix Betae special
Fertile.
After testing, the purity of the ammonium dihydrogen phosphate made reaches more than 97%, contains in the Radix Betae special fertilizer madeThe potassium phosphate compound fertilizer of root, and containWithRealizing controlled-release fertile, whereinWithMol ratio be 1:2.
Embodiment two
A kind of production method preparing ammonium dihydrogen phosphate by-product Radix Betae special fertilizer that the present embodiment provides, mainly includes following
Step:
1) using phosphoric acid to mix with phosphoamide, what phosphoric acid mixed with phosphoamide is 1.5:1 according to mol ratio, and with the speed that heats up
Degree is that 3～8 DEG C/min is warming up to 160 DEG C from 80 DEG C, stirring reaction 4-5h, isolated intermediate, then intermediate is added ammonia
In aqueous solution, described intermediate is 1:1.2 with the mol ratio of ammonia, and temperature is adjusted to 50～65 DEG C, stirring reaction 2～3h, instead
After should terminating, carrying out crystallisation by cooling filtration treatment, crystallization temperature is 30～35 DEG C, makes filtrate circulation crystallization in cooler crystallizer
Process, it is thus achieved that filter cake be ammonium dihydrogen phosphate product, detection filtrate in component content；
2) in filtrate, add potassium hydroxide solution and phosphoric acid solution, adjust middle pH value and nitrogen, phosphorus, the potassium content of filtrate,
The concentration of described potassium hydroxide solution is 15%, and the concentration of described phosphoric acid solution is 10%, when filtrate pH value is 3.5～4,
When the content of nitrogen component is 20-25%, phosphorus composition content is 4-8%, potassium component content is 10-15%, stop adding hydroxide
Potassium solution and phosphoric acid solution, add formalin the most in the solution, and temperature rises to 50～65 DEG C, stirring reaction 4h；
3) in filtrate, add the trace element such as the moderate-element such as calcium, magnesium and Borax, zinc sulfate, manganese sulfate, cobalt nitrate, stir
Mix reaction 1～1.5h；
4) by step 3) in the solution that obtains be cooled to 15～20 DEG C, carry out crystallization treatment, obtain at the beginning of compound state compound fertilizer
Finished product, when the content of the nitrogen component in compound state compound fertilizer just finished product be 23%, phosphorus composition content be 3%, potassium component content be
When 13%, stop crystallization.
5) compound state compound fertilizer just finished product is carried out pelletize, in the environment of 45～55 DEG C, then dry that to make Radix Betae special
Fertile.
After testing, the purity of the ammonium dihydrogen phosphate made reaches more than 97%, contains in the Radix Betae special fertilizer madeThe potassium phosphate compound fertilizer of root, and containWithRealizing controlled-release fertile, wherein
WithMol ratio be 1:3.
Embodiment three
A kind of production method preparing ammonium dihydrogen phosphate by-product Radix Betae special fertilizer that the present embodiment provides, mainly includes following
Step:
1) using phosphoric acid to mix with phosphoamide, what phosphoric acid mixed with phosphoamide is 1.4:1 according to mol ratio, and with the speed that heats up
Degree is that 3～8 DEG C/min is warming up to 160 DEG C from 80 DEG C, stirring reaction 4-5h, isolated intermediate, then intermediate is added ammonia
In aqueous solution, described intermediate is 1:1.3 with the mol ratio of ammonia, and temperature is adjusted to 50～65 DEG C, stirring reaction 2～3h, instead
After should terminating, carrying out crystallisation by cooling filtration treatment, crystallization temperature is 30～35 DEG C, makes filtrate circulation crystallization in cooler crystallizer
Process, it is thus achieved that filter cake be ammonium dihydrogen phosphate product, detection filtrate in component content；
2) in filtrate, add potassium hydroxide solution and phosphoric acid solution, adjust middle pH value and nitrogen, phosphorus, the potassium content of filtrate,
The concentration of described potassium hydroxide solution is 13%, and the concentration of described phosphoric acid solution is 12%, when filtrate pH value is 3.5～4,
When the content of nitrogen component is 20-25%, phosphorus composition content is 4-8%, potassium component content is 10-15%, stop adding hydroxide
Potassium solution and phosphoric acid solution, add formalin the most in the solution, and temperature rises to 50～65 DEG C, stirring reaction 3h；
3) in filtrate, add the trace element such as the moderate-element such as calcium, magnesium and Borax, zinc sulfate, manganese sulfate, cobalt nitrate, stir
Mix reaction 1～1.5h；
4) by step 3) in the solution that obtains be cooled to 15～20 DEG C, carry out crystallization treatment, obtain at the beginning of compound state compound fertilizer
Finished product, when the content of the nitrogen component in compound state compound fertilizer just finished product be 21%, phosphorus composition content be 5%, potassium component content be
When 11%, stop crystallization.
5) compound state compound fertilizer just finished product is carried out pelletize, in the environment of 45～55 DEG C, then dry that to make Radix Betae special
Fertile.
After testing, the purity of the ammonium dihydrogen phosphate made reaches more than 97%, contains in the Radix Betae special fertilizer madeThe potassium phosphate compound fertilizer of root, and containWithRealizing controlled-release fertile, wherein
WithMol ratio be 1:4.
In order to preferably prove the beneficial effect that the present invention reaches, the present embodiment also provides for following experimental example, specific as follows:
Experimental example one
Fertile as fertilizer with common N, P, K mixing, wherein the content of nitrogen component be 21%, phosphorus composition content be 5%, potassium
Component content is 11%, makes culture fluid, and Radix Betae carries out soilless culture, after cultivating 30 days, and N, P, K composition in detection culture fluid
Content, observe its growing way, named A1 simultaneously.
Experimental example two is to experimental example four
The Radix Betae special fertilizer being successful with embodiment one to embodiment tripartite's method, as fertilizer, makes culture fluid, to sweet
Dish carries out soilless culture, cultivate 15 days, 30 days, after 50 days, the content of N, P, K composition in detection culture fluid, observes simultaneously respectively
Its growing way, is respectively designated as A2, A3, A4.
The concentration of the culture fluid in above experimental example is suitable, and for prior art, this experimental example seldom elaborates, above reality
Test example with 20 strain Radix Betaes for testing result such as table 1, table 2 and table 3:
Table 1: the content of N, P, K composition after cultivating 15 days
Table 2: the content of N, P, K composition after cultivating 30 days
Table 3: the content of N, P, K composition after cultivating 50 days
From table 1～3 it can be seen that with common compound fertilizer compared with the Radix Betae special fertilizer that the present invention produces, cultivate the 15th
During it detection, the absorbing state difference of its N, P, K is little, but during to detection in the 30th day, the Radix Betae special fertilizer that the present invention produces
The content of N, P, K in solution is significantly lower than common special fertilizer, during to detection in the 50th day, in common compound fertilizer's culture fluid
N, P, K component residue has 60～80% not absorb, and N, P, K composition in the culture fluid of the Radix Betae special fertilizer that the present invention produces is only
Remain 30～40% not absorbed, illustrate that the Radix Betae special fertilizer that the present invention produces has the advantages that absorbance is good.
Claims (7)
1. prepare a production method for ammonium dihydrogen phosphate by-product Radix Betae special fertilizer, mainly comprise the steps that
1) use phosphoric acid to mix with phosphoamide, and be that 3～8 DEG C/min is warming up to 160 DEG C from 80 DEG C with programming rate, stirring reaction
4-5h, isolated intermediate, then intermediate is added in ammonia spirit, temperature is adjusted to 50～65 DEG C, stirring reaction 2～3h,
After reaction terminates, carrying out crystallisation by cooling filtration treatment, crystallization temperature is 30～35 DEG C, makes filtrate circulate knot in cooler crystallizer
Brilliant process, it is thus achieved that filter cake be ammonium dihydrogen phosphate product, the component content in detection filtrate；
2) in filtrate, add potassium hydroxide solution and phosphoric acid solution, adjust middle pH value and nitrogen, phosphorus, the potassium content of filtrate, work as filter
Liquid, pH value is 3.5～4, and the content of nitrogen component is 20-25%, phosphorus composition content is 4-8%, potassium component content is 10-15%
Time, stopping adding potassium hydroxide solution and phosphoric acid solution, add formalin the most in the solution, temperature rises to 50～65 DEG C,
Stirring reaction 2.5～4h；
3) in filtrate, calcium, the moderate-element of magnesium and Borax, zinc sulfate, manganese sulfate, the trace compound of cobalt nitrate are added,
Stirring reaction 1～1.5h；
4) by step 3) in the solution that obtains be cooled to 15～20 DEG C, carry out crystallization treatment, obtain compound state compound fertilizer just finished product,
Described compound state compound fertilizer just finished product containsThe potassium phosphate compound fertilizer of root；
5) compound state compound fertilizer just finished product is carried out pelletize, then dry in the environment of 45～55 DEG C and make Radix Betae special fertilizer.
A kind of production method preparing ammonium dihydrogen phosphate by-product Radix Betae special fertilizer, it is characterised in that:
What phosphoric acid mixed with phosphoamide is (1.2-1.5) according to mol ratio: 1.
A kind of production method preparing ammonium dihydrogen phosphate by-product Radix Betae special fertilizer, it is characterised in that:
The intermediate of described addition and the mol ratio of ammonia are 1:(1.2～1.4).
A kind of production method preparing ammonium dihydrogen phosphate by-product Radix Betae special fertilizer, it is characterised in that:
The concentration of described potassium hydroxide solution is 10～15%.
A kind of production method preparing ammonium dihydrogen phosphate by-product Radix Betae special fertilizer, it is characterised in that:
The concentration of described phosphoric acid solution is 10～15%.
A kind of production method preparing ammonium dihydrogen phosphate by-product Radix Betae special fertilizer, it is characterised in that:
Described crystallization treatment is: when the content of the nitrogen component in compound state compound fertilizer just finished product be 18-23%, phosphorus composition content be 3-
6%, when potassium component content is 8-13%, crystallization is stopped.
A kind of production method preparing ammonium dihydrogen phosphate by-product Radix Betae special fertilizer, it is characterised in that:
Described compound state compound fertilizer just finished product rich in
Realizing controlled-release fertile, whereinWith's
Mol ratio is 1:(2～4).
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| GB1070641A (en) * | 1963-01-23 | 1967-06-01 | Fisons Horticulture Ltd | Fertilizers |
| JPS59141478A (en) * | 1983-01-31 | 1984-08-14 | 長谷川 杢治 | Manufacture of liquid fertilizer |
| CN1060648A (en) * | 1990-10-08 | 1992-04-29 | 邢新华 | Polybasic fertilizer |
| US6254655B1 (en) * | 1999-03-18 | 2001-07-03 | Oms Investments, Inc. | Processes for preparing granular composite fertilizer compositions and products produced thereby |
| CN102531732A (en) * | 2010-12-15 | 2012-07-04 | 吴鲁智 | Fertilizer formula (31 percent of total nutrient of nitrogen, phosphorus and potassium) special for beet |
| AU2012230753A1 (en) * | 2011-03-24 | 2013-10-03 | Paul Kucera | Fertilizer composition incorporating fibrous material for enhanced particle integrity |
| CN103172466A (en) * | 2011-12-25 | 2013-06-26 | 陕西新华农物资有限公司 | Special enhancing fertilizer for sugar beets |
| CN103787293A (en) * | 2014-01-24 | 2014-05-14 | 贵阳中化开磷化肥有限公司 | Method for preparing sodium dihydrogen phosphate by utilizing phosphoric acid by wet process |
| CN103964959A (en) * | 2014-05-12 | 2014-08-06 | 朔州市新科技工程技术有限责任公司 | Special fertilizer for sugarbeet |
| CN104016323A (en) * | 2014-05-20 | 2014-09-03 | 贵阳中化开磷化肥有限公司 | Production method for monoammonium phosphate |
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2014
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