CN104291290B - A kind of method preparing the special enhancing fertilizer of ammonium dihydrogen phosphate co-production Bulbus Allii Cepae - Google Patents
A kind of method preparing the special enhancing fertilizer of ammonium dihydrogen phosphate co-production Bulbus Allii Cepae Download PDFInfo
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Abstract
The present invention relates to chemical technology field, disclose a kind of method preparing the special enhancing fertilizer of ammonium dihydrogen phosphate co-production Bulbus Allii Cepae, by detecting the amount of the various nutrients absorbed from soil in Bulbus Allii Cepae growth course, analyze the proportioning of the nutrient of Bulbus Allii Cepae necessary for growth, then phosphoric acid and phosphoamide is adopted to react generation intermediate, in this intermediate, pass into ammonia again produce ammonium dihydrogen phosphate, make a portion ammonium dihydrogen phosphate crystallization, needed for proportioning in order to regulate reactant liquor Middle nutrition element meets Bulbus Allii Cepae growth, and other nutrients needed for adding Bulbus Allii Cepae are to prepare the special enhancing fertilizer of Bulbus Allii Cepae.This production method makes raw material be fully utilized, and the ammonium dihydrogen phosphate quality produced is better, and the special enhancing of Bulbus Allii Cepae of preparation is fertile less costly.
Description
Technical field
The present invention relates to chemical technology field, particularly relate to a kind of method preparing the special enhancing fertilizer of ammonium dihydrogen phosphate co-production Bulbus Allii Cepae.
Background technology
Ammonium dihydrogen phosphate, is also called MAP, is a kind of chemicals, and the crystal of a kind of white, heating can resolve into ammonium metaphosphate.Ammonium dihydrogen phosphate can serve as the fireproof agent of fertilizer and timber, paper, fabric, it is also possible in pharmacy and feed additive for ruminant.At present, the monoammonium phosphate double decomposition that ammonium dihydrogen phosphate adopts is prepared.It is water, potassium chloride, ammonium hydrogen carbonate to be fed intake in proportion, is subsequently adding the phosphoric acid of ormal weight, after being sufficiently stirred for, adjust pH value, after heating concentration, cooled crystallization, centrifugation, namely obtaining product after drying, the mother liquid obtained concentration of centrifugation is the multi-elements composite fertilizers such as nitrogenous, phosphorus, potassium.This technique does not have three waste discharge, and production cost relatively neutralisation, crystallization process, extraction, ion exchange are low.But product quality is not so good as neutralisation, extraction, ion exchange, does agricultural only, and therefore, the value of its product can be significantly less than other method.But, crystallization process, in legal, extraction and ion exchange prepare in the process of potassium dihydrogen phosphate and all have waste liquid to discharge, to environment.
The improvement of above technology still also exists bigger problem and difficulty, its process regulation is bad, then can generate other other products in the reaction, as ammonium dihydrogen phosphate can generate ammonium metaphosphate when heating, cause that the yield of ammonium dihydrogen phosphate is relatively low, meanwhile, whole production technology also has the discharge of substantial amounts of waste material, it is difficult to solve the zero-emission problem of pollutant；And, ammonium dihydrogen phosphate product is also difficult to precipitate out completely in the process of crystallization, but it is in the saturated solution of saturation all the time, then make ammonium dihydrogen phosphate content in the solution bigger, if degree of depth crystallization, the purity of the ammonium dihydrogen phosphate product then obtained is poor, affects the quality of ammonium dihydrogen phosphate product.
Production method about ammonium dihydrogen phosphate has a lot, such as, number of patent application is 201210194632.7 disclosed " methods producing industrial phosphoric acid ammonium dihydrogen ", its the technical scheme is that the first step add in phosphoric acid by wet process a certain amount of phosphate ore pulp reaction stand a period of time carry out preliminary desulfurization, then after taking supernatant addition barium salt and sodium salt defluorinate, pass into ammonia to be neutralized, refilter and namely obtain ammonium phosphate solution, again by the phosphoric acid hybrid reaction after this ammonium phosphate solution and extraction, condensing crystallizing just obtains ammonium dihydrogen phosphate.The biphosphate ammonium concentration that the method is produced is higher, but its production technology is complex, and production cost is higher, and has waste liquid to discharge, to environment.
Bulbus Allii Cepae, another name ball Herba Alii fistulosi, onion, Onion, onion, Holland Herba Alii fistulosi.Bulbus Allii Cepae is very wide in China's distribution, and all there is cultivation various places, north and south, and cultivated area is also in continuous expansion, is one of current China main cultivation vegetable.The bactericidal ability of Bulbus Allii Cepae is strong, few ill insect pest, is the clean pollution-free pollution-free food of a kind of comparison.Bulbus Allii Cepae contains prostaglandin A, can reduce peripheral vascular resistance, reduces blood viscosity, can be used for reducing blood pressure, refreshment, alleviation pressure, preventing cold.Bulbus Allii Cepae can also oxygen-derived free radicals in purged body, strengthen metabolic capabilities, defying age, pre-preventing bone rarefaction, is the health food that person in middle and old age are rare.Bulbus Allii Cepae edible part reaches 90%, heat content 163kJ in every l00g, moisture 89.2g, protein 1.1g, fat 0.2g, dietary fiber 0.9g, carbohydrate 8.Ig, carotene 20 μ g, retinol equivalent 3 μ g, thiamine 0.03mg, riboflavin 0.03mg, Buddhist nun g acid 0.3mg；Vitamin C 8mg, vitamin E 0.14mg；Potassium 147mg, sodium 4.4mg, calcium 24mg, magnesium 15mg, ferrum 0.6mg, manganese 0.14mg, zinc 0.23mg, phosphorus 39mg, selenium 0.92pg.
Improving the yield of Bulbus Allii Cepae, the selection getting hold of the opportunity of fertilising, consumption and fertilizer type is crucial, and the formula in fertilizer is reasonable, can not only reduce fertilising cost, and can promote the yield of crop.The Bulbus Allii Cepae fertilising of plantation at present is with carbamide for auxiliary.Carbamide can meet the demand in Bulbus Allii Cepae growth course to nitrogen element at short notice, but is difficult to the demand meeting Bulbus Allii Cepae for phosphorus and potassium element, causes that onion yield is not high.Meanwhile, the nutrient formula of carbamide is unreasonable, can cause the waste of fertilizer, and be difficult to promote the stable high yield of Bulbus Allii Cepae.Application for a patent for invention number is 20111426342.6 disclose " Bulbus Allii Cepae is special strengthens fertilizer ", this fertilizer is by by carbamide, ammonium nitrate, calcium and magnesium phosphorus, double superhosphate, potassium nitrate and additive mix, contained nutrient is abundanter, but fertilizer efficiency is shorter, and the utilization rate of fertilizer is 20-30%, causes the waste of substantial amounts of nutrient.Part Residual Fertilizer, in soil, makes soil compaction.
Summary of the invention
In view of this, it is an object of the invention to provide a kind of method preparing the special enhancing fertilizer of ammonium dihydrogen phosphate co-production Bulbus Allii Cepae, with solve existing fertilizer Middle nutrition element collocation do not meet the Bulbus Allii Cepae demand to nutrient, cause that the fertilizer that Bulbus Allii Cepae is used is relatively low by Bulbus Allii Cepae absorbance, some of them element compound remains in soil, change the structure of soil, contaminated environment.Simultaneously, solve in the process preparing ammonium dihydrogen phosphate product, the waste of the substantial amounts of ammonium dihydrogen phosphate that ammonium dihydrogen phosphate crystallization not exclusively can cause, biphosphate crystalline ammonium brings a large amount of impurity into can to excessively again ammonium dihydrogen phosphate product, then makes the technical problem that the purity of ammonium dihydrogen phosphate product is relatively low.
The present invention solves above-mentioned technical problem by the following technical programs:
A kind of method preparing the special enhancing fertilizer of ammonium dihydrogen phosphate co-production Bulbus Allii Cepae, comprises the following steps:
1. prepare intermediate: first add phosphoric acid in reactor, and the temperature of phosphoric acid is increased to 120-140 DEG C, then adding phosphoamide in reactor makes itself and phosphoric acid carry out synthetic reaction, after reaction 200-240min, crystallization after temperature is cooled to 15-30 DEG C, centrifugation obtains the mol ratio of intermediate, described phosphoric acid and phosphoamide again is (1.1-1.3): 1；
2. prepare ammonium dihydrogen phosphate: send in reactor by the intermediate obtained in step (1), and pass into ammonia in reactor, the mol ratio of ammonia and intermediate is (1.4-1.6): 1, the control response time is 40-60min, reaction temperature is 15-25 DEG C, and to regulate pH value be 8-9, after reaction terminates, the slip of acquisition is joined circulation crystallization in cooler crystallizer, filtrate is analyzed in detection simultaneously, when in filtrate, the mass ratio of nitrogen and phosphorus pentoxide is (10-15): time (4.5-6), stop crystallization and filter, ammonium dihydrogen phosphate product is obtained after being dried by the filter cake obtained；
3. preparation Bulbus Allii Cepae is special strengthens fertilizer: add in the filtrate filter in step (2) ammonium dihydrogen phosphate that the compound of potassium adjusts nitrogen content to be 10-15%, phosphorus pentoxide content be 4.5-6%, potassium oxide content is 9-12%, middle and trace element compound is added again in filtrate, finally filtrate is sent in baker, for 4 DEG C/min, temperature is increased to 26-30 DEG C with programming rate, drying filtrate to moisture is 3-4%, can be prepared by the special enhancing fertilizer of Bulbus Allii Cepae.
Described intermediate is urea phosphate.
In described step (1), phosphoric acid and phosphoamide being added in reactor with mol ratio for 1.2:1 and mix, controlling reaction temperature is 130 DEG C, and after reaction 220min, after temperature is cooled to 20 DEG C, centrifugation obtains intermediate again.
In described step (2), when intermediate reacts with ammonia, mixing speed is 200r/min, and the response time is 50min, and the pH value of reaction solution is 8.5.
Described medium trace element compound is calcium sulfate, zinc sulfate, magnesium sulfate, Borax and manganese sulfate, ferrous sulfate, sodium sulfate.
The mol ratio of described intermediate and ammonia is 1:1.5.
Adopting programming rate when drying in described step (3) is that 4 DEG C/min is warming up to 28 DEG C, and after dry 40min, adjusting moisture is 3.5%.
In the special enhancing fertilizer of described Bulbus Allii Cepae nitrogen content be 12%, phosphorus pentoxide content be 5%, potassium oxide content be 10%.
The beneficial effects of the present invention is:
1, in tradition ammonium dihydrogen phosphate preparation technology, although MAP double decomposition does not have three waste discharge, production cost relatively neutralisation, crystallization process, extraction, ion exchange are low.But product quality is not so good as neutralisation, extraction, ion exchange, does agricultural only, and therefore, the value of its product can be significantly less than other method.But, crystallization process, in legal, extraction and ion exchange prepare in the process of potassium dihydrogen phosphate and all have waste liquid to discharge, to environment.After the present invention adopts phosphoric acid to react with phosphoamide, then react with ammonia with reaction product, then make ammonium dihydrogen phosphate crystallization, by detecting nitrogen in filtrate, the content of phosphorus composition control the degree of crystallization, filtrate is used for producing Bulbus Allii Cepae is special strengthens fertilizer.Ammonium dihydrogen phosphate crystallization degree is less, so the ammonium dihydrogen phosphate purity made is higher.Meanwhile, it is used for filtrate recovery preparing the special enhancing fertilizer of Bulbus Allii Cepae so that the production cost of Bulbus Allii Cepae special enhancing fertilizer is relatively low.
2, by the present invention in that preparation ammonium dihydrogen phosphate, and then the content of nitrogen in adjustment reactant liquor, phosphorus meets the ratio that Bulbus Allii Cepae growth is required, the special enhancing fertilizer of Bulbus Allii Cepae produced can be absorbed more fully by Bulbus Allii Cepae, with minimum fertilizers input, the Bulbus Allii Cepae that output is maximum, has significant economic worth.
3, reactant liquor is precipitated out a part of ammonium dihydrogen phosphate by the present invention, is then used for filtrate preparing the special enhancing fertilizer of Bulbus Allii Cepae, it does not have contaminated environment discharged by tail washings, has the significant value of environmental protection again.
4, the Bulbus Allii Cepae special enhancing fertilizer of the present invention is chemical combination state Chemical Mixed Fertilizer, by to parameter in production technology, namely it is exactly temperature, the control of material concentration and proportioning, after making phosphoric acid and urea reaction, generate urea phosphate product, urea phosphate product itself has stronger acidity, and be the chemical combination state double salt that is combined together to form of the mode by coordinate bond between phosphoric acid and carbamide, also it is fertile as crop in conventional art, and the absorbance comparison carbamide that crop is to this chemical combination state double salt, ammonium carbonate, the unitary such as ammonium nitrate, the special enhancing fertilizer of binary fertilizer absorbance all preferably a kind of chemical combination state, but, this chemical combination state double salt is under the environment that phosphoric acid exists, at the temperature of 80-250 DEG C, the decomposition polyreaction of complexity can be there is, urea phosphate is made to form (H2PO4)-and (H2NCONH3)+two ions, (H2NCONH3)+ion is close with phosphoric acid, and under the environment that temperature is 80-160 DEG C, is formedIntermediate-ion and dihydrogen phosphate, and between C and O, form coordinate bond, this intermediate-ion can form multielement intermediate-ion with centering element compound chelating, and then can continue to the compound electronegative with other or ion formation chelate, improve constituent content in double salt, and then the nutrient content in the double salt that this ion exists can be adjusted, simultaneously, this chelate can be hydrolyzed again and by crop, and then effectively long-term can provide fertilizer efficiency for crop.
Detailed description of the invention
In order to conveniently it is understood by those skilled in the art that the present invention will be further described below in conjunction with embodiment.Embodiment is only the illustration to this invention, is not limitation of the invention, and the step not making in embodiment to illustrate is all prior art, is not described in detail at this.
The present invention carries out research and discussion by the mechanism that phosphoric acid and phosphoamide are reacted, and recognizes in conjunction with prior art literature, and phosphoric acid and phosphoamide react generation urea phosphate, and its molecular formula is: CO (NH2)2.H3PO4Under the environment of higher temperature, the chemical bond meeting dialysis between H and O in phosphoric acid, hydrion is combined with carbamide and forms the ionic state containing positive charge, urea phosphate is made to form 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)+。
Urea phosphate ion double salt under the environment that phosphoric acid exists, (H therein2NCONH3)+Cation is close with phosphoric acid, forms the intermediate-ion of C → O coordinate bond, is (CO5PN2H8)+, and then make in urea phosphate intermediate containing substantial amounts of (H2PO4)-(CO5PN2H8)+Ion, when adding excessive and appropriate potassium ion, dihydrogen phosphate and potassium ion form ammonium dihydrogen phosphate crystal and are precipitated, unnecessary potassium ion and (CO5PN2H8)+Ionic reaction, and displace part NH4 +So that containing (CO in solution5PNH4K)+Double salt ion, and analyze and control the content of N in solution, P, K element by detecting, heat drying can be prepared by containing N, P, K element chemical combination state compound fertilizer.
The main chemical reactions equation that the present invention relates to is:
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 there is coordinate bond between C atom and O atom.
With embodiment, the production method of the present invention is described further below:
Embodiment one
A kind of method preparing the special enhancing fertilizer of ammonium dihydrogen phosphate co-production Bulbus Allii Cepae, comprises the following steps:
(1) intermediate is prepared: first add phosphoric acid in reactor, and the temperature of phosphoric acid is increased to 120 DEG C, then adding phosphoamide in reactor makes itself and phosphoric acid carry out synthetic reaction, after reaction 240min, crystallization after temperature is cooled to 15 DEG C, centrifugation obtains the mol ratio of intermediate, described phosphoric acid and phosphoamide again is 1.1:1；
(2) ammonium dihydrogen phosphate is prepared: send in reactor by the intermediate obtained in step (1), and pass into ammonia in reactor, the mol ratio of ammonia and intermediate is 1.4:1, the control response time is 40min, reaction temperature is 25 DEG C, and to regulate pH value be 8, after reaction terminates, the slip of acquisition is joined circulation crystallization in cooler crystallizer, filtrate is analyzed in detection simultaneously, when the mass ratio of nitrogen and phosphorus pentoxide is 10:4.5 in filtrate, stops crystallization and also filter, after being dried by the filter cake obtained, obtain ammonium dihydrogen phosphate product；
(3) prepare that Bulbus Allii Cepae is special strengthens fertilizer: add in the filtrate filter in step (2) ammonium dihydrogen phosphate the compound of potassium adjust nitrogen content be 10%, phosphorus pentoxide content be 4.5%, potassium oxide content be 9%, add calcium sulfate again in filtrate, zinc sulfate, magnesium sulfate, Borax and manganese sulfate, ferrous sulfate, sodium sulfate are adjusted to the nutrient ratio that Bulbus Allii Cepae growth is required, finally filtrate is sent in baker, for 4 DEG C/min, temperature is increased to 26 DEG C with programming rate, drying filtrate to moisture is 4%, can be prepared by the special enhancing fertilizer of Bulbus Allii Cepae.
Described intermediate is urea phosphate.
In described phosphoric acid, the content of phosphorus pentoxide is 50-75%.
Embodiment two
A kind of method preparing the special enhancing fertilizer of ammonium dihydrogen phosphate co-production Bulbus Allii Cepae, comprises the following steps:
(1) intermediate is prepared: first add phosphoric acid in reactor, and the temperature of phosphoric acid is increased to 140 DEG C, then adding phosphoamide in reactor makes itself and phosphoric acid carry out synthetic reaction, after reaction 200min, crystallization after temperature is cooled to 30 DEG C, centrifugation obtains the mol ratio of intermediate, described phosphoric acid and phosphoamide again is 1.3:1；
(2) ammonium dihydrogen phosphate is prepared: send in reactor by the intermediate obtained in step (1), and pass into ammonia in reactor, the mol ratio of ammonia and intermediate is 1.6:1, the control response time is 60min, reaction temperature is 15 DEG C, and to regulate pH value be 9, after reaction terminates, the slip of acquisition is joined circulation crystallization in cooler crystallizer, filtrate is analyzed in detection simultaneously, when the mass ratio of nitrogen and phosphorus pentoxide is 15:6 in filtrate, stops crystallization and also filter, after being dried by the filter cake obtained, obtain ammonium dihydrogen phosphate product；
(3) prepare that Bulbus Allii Cepae is special strengthens fertilizer: add in the filtrate filter in step (2) ammonium dihydrogen phosphate the compound of potassium adjust nitrogen content be 15%, phosphorus pentoxide content be 6%, potassium oxide content be 12%, add calcium sulfate again in filtrate, zinc sulfate, magnesium sulfate, Borax and manganese sulfate, ferrous sulfate, sodium sulfate are adjusted to the nutrient ratio that Bulbus Allii Cepae growth is required, finally filtrate is sent in baker, temperature is increased to programming rate for 4 DEG C/min, 30 DEG C, drying filtrate to moisture is 4%, can be prepared by the special enhancing fertilizer of Bulbus Allii Cepae.
Described intermediate is urea phosphate.
In described phosphoric acid, the content of phosphorus pentoxide is 50-75%.
Embodiment three
(1) intermediate is prepared: first add phosphoric acid in reactor, and the temperature of phosphoric acid is increased to 130 DEG C, then adding phosphoamide in reactor makes itself and phosphoric acid carry out synthetic reaction, after reaction 220min, crystallization after temperature is cooled to 20 DEG C, centrifugation obtains the mol ratio of intermediate, described phosphoric acid and phosphoamide again is 1.2:1；
(2) ammonium dihydrogen phosphate is prepared: send in reactor by the intermediate obtained in step (1), and pass into ammonia in reactor, the mol ratio of ammonia and intermediate is 1.5:1, the control response time is 50min, reaction temperature is 20 DEG C, and to regulate pH value be 8.5, after reaction terminates, the slip of acquisition is joined circulation crystallization in cooler crystallizer, filtrate is analyzed in detection simultaneously, when the mass ratio of nitrogen and phosphorus pentoxide is 12:5 in filtrate, stops crystallization and also filter, after being dried by the filter cake obtained, obtain ammonium dihydrogen phosphate product；
(3) prepare that Bulbus Allii Cepae is special strengthens fertilizer: add in the filtrate filter in step (2) ammonium dihydrogen phosphate the compound of potassium adjust nitrogen content be 12%, phosphorus pentoxide content be 5%, potassium oxide content be 10%, add calcium sulfate again in filtrate, zinc sulfate, magnesium sulfate, Borax and manganese sulfate, ferrous sulfate, sodium sulfate are adjusted to the nutrient ratio that Bulbus Allii Cepae growth is required, finally filtrate is sent in baker, for 4 DEG C/min, temperature is increased to 28 DEG C with programming rate, drying filtrate to moisture is 3.5%, can be prepared by the special enhancing fertilizer of Bulbus Allii Cepae.
Described intermediate is urea phosphate, and in phosphoric acid, the content of phosphorus pentoxide is 50-75%.
It is verified below in conjunction with the test example technique effect to technical solution of the present invention and the quality of ammonium dihydrogen phosphate product that produces:
Test example one
According to HG/T3466-2012 " People's Republic of China's chemical industry standard " chemical reagent ammonium dihydrogen phosphate test experience method, the quality of the product that embodiments of the invention one, embodiment two and embodiment three are produced is detected, and its result is as shown in table 1.
Table 1 produces the quality measurements of ammonium dihydrogen phosphate product for embodiments of the invention:
As can be seen from the above table, the various parameters of the ammonium dihydrogen phosphate product that technical scheme is produced exceed feed grade ammonium dihydrogen phosphate required standard, and the purity of product is also higher, have significant progressive.
Test example two
Growing state according to the Bulbus Allii Cepae absorption to constituent content and Bulbus Allii Cepae, fertile compares test with Common compound fertilizer to special enhancing of Bulbus Allii Cepae.With six basin Bulbus Allii Cepae seedling for subjects, it is numbered A, B, C, D, E, F respectively, the Bulbus Allii Cepae seedling of tri-labels of A, B, C is used common fertilizer, the Bulbus Allii Cepae seedling of three labels such as D, E, F is used the special enhancing fertilizer of the Bulbus Allii Cepae in embodiment one, embodiment two, embodiment three respectively, shown in comparative test result following table:
By above-mentioned result of the test it can be seen that the special fertilizer that strengthens of this Bulbus Allii Cepae promotes the growth of Bulbus Allii Cepae, improve the yield of Bulbus Allii Cepae, be suitable to promote the use of.
Claims (8)
1. prepare the special method strengthening fertilizer of ammonium dihydrogen phosphate co-production Bulbus Allii Cepae for one kind, it is characterised in that: comprise the following steps:
(1) intermediate is prepared: first add phosphoric acid in reactor, and the temperature of phosphoric acid is increased to 120-140 DEG C, then adding phosphoamide in reactor makes itself and phosphoric acid carry out synthetic reaction, after reaction 200-240min, crystallization after temperature is cooled to 15-30 DEG C, centrifugation obtains the mol ratio of intermediate, described phosphoric acid and phosphoamide again is (1.1-1.3): 1；
(2) ammonium dihydrogen phosphate is prepared: send in reactor by the intermediate obtained in step (1), and pass into ammonia in reactor, the mol ratio of ammonia and intermediate is (1.4-1.6): 1, the control response time is 40-60min, reaction temperature is 15-25 DEG C, and to regulate pH value be 8-9, after reaction terminates, the slip of acquisition is joined circulation crystallization in cooler crystallizer, filtrate is analyzed in detection simultaneously, when in filtrate, the mass ratio of nitrogen and phosphorus pentoxide is (10-15): time (4.5-6), stop crystallization and filter, ammonium dihydrogen phosphate product is obtained after being dried by the filter cake obtained；
(3) prepare that Bulbus Allii Cepae is special strengthens fertilizer: in the filtrate filter in step (2) ammonium dihydrogen phosphate, add that the compound of potassium adjusts nitrogen content to be 10-15%, phosphorus pentoxide content be 4.5-6%, potassium oxide content is 9-12%, middle and trace element compound is added again in filtrate, finally filtrate is sent in baker, for 4 DEG C/min, temperature is increased to 26-30 DEG C with programming rate, drying filtrate to moisture is 3-4%, can be prepared by the special enhancing fertilizer of Bulbus Allii Cepae.
2. preparation ammonium dihydrogen phosphate co-production Bulbus Allii Cepae according to claim 1 is special strengthens fertile method, it is characterised in that: described intermediate is urea phosphate.
3. preparation ammonium dihydrogen phosphate co-production Bulbus Allii Cepae according to claim 1 is special strengthens fertile method, it is characterized in that: in described step (1), phosphoric acid and phosphoamide are added in reactor with mol ratio for 1.2:1 and mix, controlling reaction temperature is 130 DEG C, after reaction 220min, after temperature is cooled to 20 DEG C, centrifugation obtains intermediate again.
4. preparation ammonium dihydrogen phosphate co-production Bulbus Allii Cepae according to claim 1 is special strengthens fertile method, it is characterized in that: in described step (2), when intermediate reacts with ammonia, mixing speed is 200r/min, and the response time is 50min, and the pH value of reaction solution is 8.5.
5. preparation ammonium dihydrogen phosphate co-production Bulbus Allii Cepae according to claim 1 is special strengthens fertile method, it is characterised in that: described medium trace element compound is calcium sulfate, zinc sulfate, magnesium sulfate, Borax and manganese sulfate, ferrous sulfate, sodium sulfate.
6. preparation ammonium dihydrogen phosphate co-production Bulbus Allii Cepae according to claim 1 is special strengthens fertile method, it is characterised in that: the mol ratio of described intermediate and ammonia is 1:1.5.
7. preparation ammonium dihydrogen phosphate co-production Bulbus Allii Cepae according to claim 1 is special strengthens fertile method, it is characterized in that: adopting programming rate time dry in described step (3) is that 4 DEG C/min is warming up to 28 DEG C, after dry 40min, adjusting moisture is 3.5%.
8. preparation ammonium dihydrogen phosphate co-production Bulbus Allii Cepae according to claim 1 is special strengthens fertile method, it is characterised in that: in the special enhancing fertilizer of described Bulbus Allii Cepae nitrogen content be 12%, phosphorus pentoxide content be 5%, potassium oxide content be 10%.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103159563A (en) * | 2011-12-19 | 2013-06-19 | 陕西新华农物资有限公司 | Enhancing fertilizer special for onion |
| 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 |
| 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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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103159563A (en) * | 2011-12-19 | 2013-06-19 | 陕西新华农物资有限公司 | Enhancing fertilizer special for onion |
| 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 |
| 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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