CN104591830A - Method for preparing special fertilizer for barley - Google Patents
Method for preparing special fertilizer for barley Download PDFInfo
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- CN104591830A CN104591830A CN201510035107.4A CN201510035107A CN104591830A CN 104591830 A CN104591830 A CN 104591830A CN 201510035107 A CN201510035107 A CN 201510035107A CN 104591830 A CN104591830 A CN 104591830A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
- C01B25/30—Alkali metal phosphates
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B15/00—Organic phosphatic fertilisers
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
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Abstract
The invention relates to the technical field of chemical engineering and discloses a method for preparing a special fertilizer for barley. The method comprises the following steps of detecting amounts of various nutrients absorbed from the soil during the growth process of barley, analyzing the ratio of nutrients needed in growth of barley, reacting phosphoric acid with carbomite to generate an intermediate and reacting the intermediate with alkaline potassium salt. Parameters in the reaction are strictly controlled so that a part of potassium dihydrogen phosphate generated in the reaction is crystallized, the contents of nitrogen, phosphorus and potassium in the reaction liquid are adjusted to be in line with the barley growth requirements so that more barley products are harvested with the minimum fertilizer investment and the method has significant economic value.
Description
Technical field
The present invention relates to chemical technology field, particularly relate to a kind of compound method of barley special fertilizer.
Background technology
Barley, another name tries to gain wheat, meal wheat, barebacked wheat, is commonly called as rice, and belong to annual standing grain basis, stalk is sturdy, its carbohydrate content is higher, and protein, calcium, phosphorus content are medium, containing a small amount of vitamin B group.Because barley is few containing gluten (a kind of resilient protein) amount, can do nonfermented food, be one of China essential species plant.There is cultivation China various places.Barley taste is sweet, cool in nature.Energy strengthening the spleen to promote digestion, heat extraction quenches the thirst, diuresis.Starch-containing, the composition such as protein, calcium, phosphorus, wallantoin.Wallantoin can promote the healing of ulcer.At present, the fertilizer that China plantation barley is used is generally urea, and the nutritive element contained by it is mainly nitrogen, and other nutritive element contents needed for barley growth are lower, are unfavorable for the growth of barley, reduce barley production.And this fertilizer is difficult to be absorbed as much as possible completely by plant, causes element pollution environment, affects the soil property of soil.
For this reason, there is investigator to analyze the nutritive element needed for barley growth, prepare the special fertilizer needed for barley growth.Such as, number of patent application is 200710080228.6 to disclose " special fertilizer for beer barley ", its nutritive element needed for barley growth have chosen phosphoric acid diamines, urea, ammonium chloride, general calcium, fused(calcium magnesium)phosphate, potash fertilizer, zinc sulfate, cupric sulfate pentahydrate and ferrous sulfate and mixes in certain proportion, is prepared into the composite fertilizer that brewer's barley is special.
Potassium primary phosphate is that one can the field such as applicable industry, agricultural, and tool has been widely used.As in the production of industrial aspect mainly as chemical raw material, agriculturally be mainly used in the interpolation of feed and chemical fertilizer, in addition, potassium primary phosphate can also be used for food to be added as raw material, improve food mouthfeel and quality, supplement the trace elements such as potassium element for human body.Production method at present for potassium dihydrogen phosphate product mainly contains neutralisation, extraction process, ion exchange method, double decomposition, crystallization process and electrolytic process etc., the feature that neutralisation produces potassium primary phosphate neutralisation is that technical process is short, technology maturation, equipment is few, quality product is high, energy consumption is low, less investment.This method is with thermal phosphoric acid and potash for raw material, and production cost is high, is difficult to agriculturally applying, mainly for the production of the potassium primary phosphate of food, medicine and technical grade.Solvent extration becomes one of most effective means of purification of phosphoric acid, produces provide conveniently with phosphoric acid by wet process.Adopt organic solvent extractionprocess, optionally to extracting, can get rid of the type impurity ion in raw phosphoric acid, the potassium dihydrogen phosphate product quality produced is high, and energy consumption is low, but the phosphoric acid rate of recovery is low, and organic solvent is expensive, has pollution to environment.Ion hands over method can obtain compared with the raw material of pure phosphoric acid ammonium dihydrogen solution as ion-exchange with removing most of impurity with phosphoric acid by wet process in ammonia, simultaneously with the potassium hydroxide that more cheap Repone K replaces neutralisation used, production cost has larger decline compared with neutralisation, but the steam output of this method too major end item needs vaporize water, energy consumption is too high, and resin price is expensive, one-time investment is larger.In addition, often produce the ammonium chloride dilute solution that potassium primary phosphate wants by-product, when output is large, aftertreatment is pretty troublesome; React with Repone K the technical process generating potassium primary phosphate again after double decomposition mainly adopts phosphoric acid and sodium carbonate to react to prepare SODIUM PHOSPHATE, MONOBASIC.The feature of this method is that production unit is simple, and reaction conditions is gentle, easy to operate, does not pollute, reliable in quality, but the quality product of this method is not as neutralisation, can contain a small amount of sodium-chlor.Reclaim sodium-chlor power consumption in mother liquor after crystallization high, be worth low.
The improvement of above technology still also exists larger problems, its process regulation is bad, then can generate other other products in the reaction, potassium phosphate,monobasic is generated as potassium primary phosphate is easily hydrolyzed in water, cause the yield of potassium primary phosphate lower, meanwhile, in whole production technique, also have a large amount of waste and old mass emissions, be difficult to the zero release problem of address contamination; And, potassium dihydrogen phosphate product is also difficult to separate out completely in the process of crystallization, but be in the saturated solution of state of saturation all the time, then content is larger in the solution to make potassium primary phosphate, if degree of depth crystallization, the purity of the potassium dihydrogen phosphate product then obtained is poor, affects the quality of potassium dihydrogen phosphate product.Based on this, by carrying out research and discussion to potassium primary phosphate as the character of fertilizer, and in conjunction with a large amount of reports, potassium primary phosphate has the character that can be absorbed by plants and reach more than 98%, and it is reported that common phosphate fertilizer utilization ratio absorbed by crops only can reach 10-25%, common potash fertilizer only absorbed by cropsly can utilize 45-60%, and the nitrogenous fertilizer such as urea, carbon ammonium only absorbed by cropsly can utilize 20-46%; As can be seen here, potassium primary phosphate utilization ratio absorbed by crops is apparently higher than common azophoska.
There is the method for investigator's other chemical fertilizer of coproduction in the process preparing potassium primary phosphate, such as, if the patent No. is 200610048214.6 disclosed " co-productions of a kind of potassium primary phosphate, S-based compound fertilizer and polymerize aluminum chloride ", it is produced in potassium primary phosphate process and produces S-based compound fertilizer and polymerize aluminum chloride, what improve that phosphoric acid by wet process prepares impurity in potassium dihydrogen phosphate product process affects problem, improves economic benefit.But do not see having and anyly carry out element collocation about by composite fertilizer's preparation process for the demand of crop, and the technical scheme being made into the composite fertilizer of chemical combination state exists.In the process of preparation potassium dihydrogen phosphate product, the waste of a large amount of potassium primary phosphate that potassium primary phosphate crystallization not exclusively can cause, potassium primary phosphate crystallization can bring a large amount of impurity into potassium dihydrogen phosphate product excessively again, then makes the purity of potassium dihydrogen phosphate product lower.By retrieving on the net, there is no the patent documentation or report that solve this technical problem.
Summary of the invention
In view of this, the object of this invention is to provide a kind of compound method of barley special fertilizer, the ratio of barley to the demand of nutritive element is not met to solve the collocation of existing fertilizer Middle nutrition element, the fertilizer to barley is used is caused not absorbed completely by barley, some of them element compound remains in soil, change the structure of soil, contaminate environment.Simultaneously, solve in the process of preparation potassium dihydrogen phosphate product, the waste of a large amount of potassium primary phosphate that potassium primary phosphate crystallization not exclusively can cause, potassium primary phosphate crystallization can bring a large amount of impurity into potassium dihydrogen phosphate product excessively again, then makes the technical problem that the purity of potassium dihydrogen phosphate product is lower.
The present invention solves the problems of the technologies described above by the following technical programs:
A compound method for barley special fertilizer, comprises the following steps:
(1) raw material hybrid reaction: be (1.2-1.4) with mol ratio by phosphoric acid and carboxamide: 1 hybrid reaction, with the heat-up rate of 4 DEG C/min, the temperature of two mixtures is elevated to 150-200 DEG C, stirring reaction 130-150min, after temperature being cooled to 20-40 DEG C, centrifugation obtains intermediate again;
(2) potassium primary phosphate is prepared: be 1:(1-1.2 by the intermediate that obtains in step (1) and alkaline potassium salt with mol ratio) hybrid reaction, take stirring velocity as 200-250r/min stirring reaction 40-60min, and the pH value regulating reaction is 8-9, after reaction terminates, obtain the slip of Nitrogen-and Phosphorus-containing potassium, this slip is placed in the process of cooling crystallizer circulation crystallization, detect simultaneously and analyze filtrate, when nitrogen content in filtrate is 12-16%, phosphorus pentoxide content is 6-8%, when potassium oxide content is 6-8%, stop crystallization and filter, the filter cake obtained is potassium dihydrogen phosphate product,
(3) barley special fertilizer is prepared: in the filtrate filter potassium primary phosphate in step (2) after, add the first finished product that other medium trace element compounds are adjusted to barley special fertilizer, first finished product is placed in baker, heat-up rate is adopted to be that 5 DEG C/min is warming up to 25-30 DEG C, after dry 40-60min, adjustment moisture content is 3-5%, can obtain barley special fertilizer.
Described intermediate is Ureaphil.
In described step (1), be that 1.3:1 is added in reactor and mixes with mol ratio by phosphoric acid and carboxamide, then with the heat-up rate of 4 DEG C/min, the temperature of two mixtures is elevated to 180 DEG C, stirring reaction 140min, after temperature being cooled to 30 DEG C, centrifugation obtains intermediate again.
In described filtrate, nitrogen content is 14%, phosphorus pentoxide content is 7%, potassium oxide content is 7%.
In described step (2), when intermediate and alkaline potassium salt react, stirring velocity is 230r/min, and the reaction times is 50min, and the pH value of reaction soln is 8.5.
Described alkaline potassium salt is potassium hydroxide.
Described medium trace element compound is calcium sulfate, zinc sulfate, magnesium sulfate, ferrous sulfate, borax and copper sulfate.
The mol ratio of described intermediate and alkaline potassium salt is 1:1.1.
Adopt heat-up rate to be that 5 DEG C/min is warming up to 28 DEG C in described step (3), after dry 50min, adjustment moisture content is 4%, can obtain barley special fertilizer.
Beneficial effect of the present invention is:
1, it is first react with phosphoric acid and sodium carbonate to prepare SODIUM PHOSPHATE, MONOBASIC that traditional double decomposition prepares potassium primary phosphate, and then to react with SODIUM PHOSPHATE, MONOBASIC and Repone K and prepare potassium primary phosphate, containing a small amount of Repone K in the potassium dihydrogen phosphate product of producing, cause the purity of potassium dihydrogen phosphate product not high, after the present invention adopts phosphoric acid and carboxamide to react, react with reactant and alkaline potassium salt again and prepare potassium primary phosphate, shorten technical process, and by controlling the various parameters in production process, make the purity of the potassium primary phosphate produced higher, reach more than 95%.
2, the present invention first separates out potassium primary phosphate by making the reaction solution of preparation barley special fertilizer, and then the content of nitrogen, phosphorus and potassium meets the ratio needed for barley growth in adjustment reaction solution, the barley special fertilizer produced can be absorbed more fully by barley, with minimum fertilizers input, the barley that output is maximum, has significant economic worth.
3, the present invention produces in the process of barley special fertilizer does not have waste liquid to discharge, and can not bring pollution to environment, has the significant value of environmental protection, and meanwhile, its raw material availability is absolutely, makes the production cost of barley special fertilizer lower.
4, barley special fertilizer of the present invention is chemical combination state Chemical Mixed Fertilizer, by to parameter in production technique, namely be exactly temperature, the control of material concentration and proportioning, after making phosphoric acid and urea reaction, generate Ureaphil product, Ureaphil product itself has stronger acidity, and between phosphoric acid and urea, be the chemical combination state double salt be combined together to form by the mode of coordinate bond, also be fertile as crop in conventional art, and crop is to the specific absorption comparison urea of this chemical combination state double salt, volatile salt, the unitary such as ammonium nitrate, binary fertilizer specific absorption is a kind of chemical combination state special fertilizer all preferably, but, under the environment that this chemical combination state double salt exists at phosphoric acid, at the temperature of 80-250 DEG C, complicated decomposition polyreaction can be there is, Ureaphil is made to form (H
2pO
4)
-(H
2nCONH
3)
+two ions, (H
2nCONH
3)
+ion and phosphoric acid close, and be under the environment of 80-160 DEG C in temperature, formed
intermediate-ion and dihydrogen phosphate, and coordinate bond is formed between C and O, this intermediate-ion can form multielement intermediate-ion with centering element compound chelating, and then the compound electronegative with other can be continued or ion forms inner complex, improve constituent content in double salt, and then the nutrient content in the double salt of this ion existence can be adjusted, simultaneously, this inner complex can be hydrolyzed again and by crop, and then can provide fertilizer efficiency for crop effectively for a long time.
Embodiment
Conveniently those skilled in the art will recognize that the present invention will be further described below in conjunction with embodiment.Embodiment is only illustrating this invention, is not limitation of the invention, and the step not doing in embodiment to illustrate is all prior arts, is not described in detail at this.
The present invention carries out research and discussion by the mechanism of reacting phosphoric acid and carboxamide, and arrives in conjunction with prior art literature, and phosphoric acid and carboxamide react and generate Ureaphil, and its molecular formula is: CO (NH
2)
2.H
3pO
4under the environment of comparatively high temps, the chemical bond meeting dialysis between H and O in phosphoric acid, hydrogen ion is combined the ionic state formed containing positive charge with urea, the ion double salt making Ureaphil form a kind of positive and negative charge to attract mutually, its mechanism structural response following expression: CO (NH
2)
2.H
3pO
4→ (H
2pO
4)
-. (H
2nCONH
3)
+.
Under the environment that Ureaphil ion double salt exists at phosphoric acid, (H wherein
2nCONH
3)
+positive ion and phosphoric acid close, form the intermediate-ion of C → O coordinate bond, be (CO
5pN
2h
8)
+, and then make in Ureaphil intermediate containing a large amount of (H
2pO
4)
-(CO
5pN
2h
8)
+ion, when adding excessive and appropriate potassium ion, dihydrogen phosphate and potassium ion form potassium dihydrogen phosphate crystal and are precipitated, unnecessary potassium ion and (CO
5pN
2h
8)
+ionic reaction, and displace part NH
4 +, make in solution containing (CO
5pNH
4k)
+double salt ion, and analyze by detecting and control the content of N in solution, P, K element, the chemical combination state composite fertilizer containing N, P, K element can be obtained at heat drying.
The main chemical reactions equation that the present invention relates to is:
Reaction formula one:
CO(NH
2)
2+H
3PO
4→CO(NH
2)
2.H
3PO
4
Reaction formula two:
Reaction formula three:
Wherein, the dotted line between carbon atom and Sauerstoffatom represents to there is coordinate bond between C atom and O atom.
Reaction formula four:
Wherein, the dotted line between carbon atom and Sauerstoffatom represents to there is coordinate bond between C atom and O atom.
With embodiment, production method of the present invention is described further below:
Embodiment one
A kind of compound method of barley special fertilizer, be that 1.2:1 is added in reactor and mixes with mol ratio by phosphoric acid and carboxamide, then with the heat-up rate of 4 DEG C/min, the temperature of two mixtures is elevated to 150 DEG C, stirring reaction 130min, after temperature being cooled to 20 DEG C, centrifugation obtains intermediate again; Be 1:1 hybrid reaction in a kettle. by this intermediate and potassium hydroxide with mol ratio, take stirring velocity as 200r/min stirring reaction 60min, and the pH value regulating reaction is 8, after reaction terminates, obtain the slip of Nitrogen-and Phosphorus-containing potassium, this slip is placed in the process of cooling crystallizer circulation crystallization, detect simultaneously and analyze filtrate, when nitrogen content in filtrate be 12%, phosphorus pentoxide content is 6%, potassium content is 6% time, stop crystallization also filtering, the filter cake obtained is potassium dihydrogen phosphate product; The first finished product that calcium sulfate, zinc sulfate, magnesium sulfate, ferrous sulfate, borax and copper sulfate are adjusted to barley special fertilizer is added in the filtrate after filtration potassium primary phosphate, first finished product is placed in baker, heat-up rate is adopted to be that 5 DEG C/min is warming up to 25 DEG C, after dry 60min, adjustment moisture content is 5%, can obtain barley special fertilizer.
Embodiment two
A kind of compound method of barley special fertilizer, be that 1.4:1 is added in reactor and mixes with mol ratio by phosphoric acid and carboxamide, then with the heat-up rate of 4 DEG C/min, the temperature of two mixtures is elevated to 200 DEG C, stirring reaction 150min, after temperature being cooled to 40 DEG C, centrifugation obtains intermediate again; Be 1:1.2 hybrid reaction in a kettle. by this intermediate and potassium hydroxide with mol ratio, take stirring velocity as 250r/min stirring reaction 40min, and the pH value regulating reaction is 8.5, after reaction terminates, obtain the slip of Nitrogen-and Phosphorus-containing potassium, this slip is placed in the process of cooling crystallizer circulation crystallization, detect simultaneously and analyze filtrate, when nitrogen content in filtrate be 12%, phosphorus pentoxide content is 8%, potassium oxide content is 8% time, stop crystallization also filtering, the filter cake obtained is potassium dihydrogen phosphate product; The first finished product that calcium sulfate, zinc sulfate, magnesium sulfate, ferrous sulfate, borax and copper sulfate are adjusted to barley special fertilizer is added in the filtrate after filtration potassium primary phosphate, first finished product is placed in baker, heat-up rate is adopted to be that 5 DEG C/min is warming up to 30 DEG C, after dry 40min, adjustment moisture content is 3%, can obtain barley special fertilizer.
Embodiment three
A kind of compound method of barley special fertilizer, be that 1.3:1 is added in reactor and mixes with mol ratio by phosphoric acid and carboxamide, then with the heat-up rate of 4 DEG C/min, the temperature of two mixtures is elevated to 180 DEG C, stirring reaction 140min, after temperature being cooled to 30 DEG C, centrifugation obtains intermediate again; Be 1:1.1 hybrid reaction in a kettle. by this intermediate and potassium hydroxide with mol ratio, take stirring velocity as 230r/min stirring reaction 50min, and the pH value regulating reaction is 8.5, after reaction terminates, obtain the slip of Nitrogen-and Phosphorus-containing potassium, this slip is placed in the process of cooling crystallizer circulation crystallization, detect simultaneously and analyze filtrate, when nitrogen content in filtrate be 14%, phosphorus pentoxide content is 7%, potassium oxide content is 7% time, stop crystallization also filtering, the filter cake obtained is potassium dihydrogen phosphate product; The first finished product that calcium sulfate, zinc sulfate, magnesium sulfate, ferrous sulfate, borax and copper sulfate are adjusted to barley special fertilizer is added in the filtrate after filtration potassium primary phosphate, first finished product is placed in baker, heat-up rate is adopted to be that 5 DEG C/min is warming up to 28 DEG C, after dry 50min, adjustment moisture content is 4%, can obtain barley special fertilizer.
Below in conjunction with test example, the technique effect of technical solution of the present invention and the quality of potassium dihydrogen phosphate product of producing are verified:
Test example one
According to GBT278-1997 " People's Republic of China's chemical industry standard " feed grade potassium primary phosphate test experience method, detect the quality of the product that embodiments of the invention one, embodiment two and embodiment three are produced, its result is as shown in table 1.
Table 1 is the quality examination of traditional method and embodiments of the invention production potassium dihydrogen phosphate product and the comparative result of its cost:
| Purity >=% | Moisture≤% | As≤％ | Pb≤％ | |
| Embodiment one | 98.3 | 0.33 | 0.00082 | 0.0019 |
| Embodiment two | 98.1 | 0.37 | 0.00086 | 0.0016 |
| Embodiment three | 99.2 | 0.32 | 0.00072 | 0.0014 |
| Standard | 98 | 0.5 | 0.001 | 0.002 |
As can be seen from the above table, the standard of the potassium dihydrogen phosphate product that technical scheme of the present invention is produced can close to feed grade potassium dihydrogen phosphate product, and the purity of product is also higher, has significant progressive.
Test example two
Choose one piece of vacant lot of 800 square metres, be equally divided into four parts, every part 200 square metres, and be designated as No. 1 ground, No. 2 ground, No. 3 ground and No. 4 ground.The barley seed choosing full seed, respectively 1,2,3 and No. 4 plantation on the ground, first at pool base fertilizer before plantation, does not refertilize later.For Guizhou weather condition, the time of plantation elects December as, and the line-spacing of plantation is 0.5 meter.1,2,3 is identical with the fertilizer amount that No. 4 grounds are used and for 15kg.Wherein, the compound manure of the embodiment of the present invention one is all used on No. 1 ground for twice, the compound manure of the embodiment of the present invention two is all used on No. 2 ground for twice, the compound manure of the embodiment of the present invention three is all used on No. 3 ground for twice, high-nitrogen compound fertilizer material is used on No. 4 ground, in this high-nitrogen compound fertilizer, nitrogen content is 25%, and phosphorus content is 15%, and potassium content is 11%.
Experimental result is: gather in the crops barley seed 190.3kg on the ground for No. 1, No. 2 gathers in the crops barley seed 189.7kg, and No. 3 ground results barley seed 192.1kg, gather in the crops barley seed 181kg by No. 4.As can be seen here, to the effect of increasing production of barley clearly, every mu of ground approximately increases production 26kg to this barley composite fertilizer special.
Specify according to Chinese feed barley quality standard " National Standard of the People's Republic of China " OB10367-89, above-mentioned barley of producing is detected.
Table 2 is the barley quality detected result of traditional method and embodiments of the invention nitrogen fertilizer production:
| Crude protein (%) | Robust fibre matter (%) | Cinder sub-prime (%) | |
| No. 1 ground | 10.7 | 4.8 | 2.1 |
| No. 2 ground | 10.4 | 4.5 | 2.5 |
| No. 3 ground | 11.2 | 4.3 | 2.1 |
| No. 4 ground | 9.7 | 5.2 | 2.7 |
| National standard reference | ≥11.0 | <5.0 | <3.0 |
| National grade ii standard | ≥10.0 | <5.5 | <3.0 |
| Country's grade III Standard | ≥9.0 | <6.0 | <3.0 |
From above-mentioned statistics, this barley special fertilizer can not only improve the output of barley, and the barley quality produced is higher, reaches national standard above grade 2.
Claims (9)
1. a compound method for barley special fertilizer, is characterized in that: comprise the following steps:
(1) raw material hybrid reaction: be (1.2-1.4) with mol ratio by phosphoric acid and carboxamide: 1 hybrid reaction, with the heat-up rate of 4 DEG C/min, the temperature of two mixtures is elevated to 150-200 DEG C, stirring reaction 130-150min, after temperature being cooled to 20-40 DEG C, centrifugation obtains intermediate again;
(2) potassium primary phosphate is prepared: be 1:(1-1.2 by the intermediate that obtains in step (1) and alkaline potassium salt with mol ratio) hybrid reaction, take stirring velocity as 200-250r/min stirring reaction 40-60min, and the pH value regulating reaction is 8-9, after reaction terminates, obtain the slip of Nitrogen-and Phosphorus-containing potassium, this slip is placed in the process of cooling crystallizer circulation crystallization, detect simultaneously and analyze filtrate, when nitrogen content in filtrate is 12-16%, phosphorus pentoxide content is 6-8%, when potassium oxide content is 6-8%, stop crystallization and filter, the filter cake obtained is potassium dihydrogen phosphate product,
(3) barley special fertilizer is prepared: in the filtrate filter potassium primary phosphate in step (2) after, add the first finished product that other medium trace element compounds are adjusted to barley special fertilizer, first finished product is placed in baker, heat-up rate is adopted to be that 5 DEG C/min is warming up to 25-30 DEG C, after dry 40-60min, adjustment moisture content is 3-5%, can obtain barley special fertilizer.
2. the compound method of barley special fertilizer according to claim 1, is characterized in that: described intermediate is Ureaphil.
3. the compound method of barley special fertilizer according to claim 1, it is characterized in that: in described step (1), be that 1.3:1 is added in reactor and mixes with mol ratio by phosphoric acid and carboxamide, then with the heat-up rate of 4 DEG C/min, the temperature of two mixtures is elevated to 180 DEG C, stirring reaction 140min, after temperature being cooled to 30 DEG C, centrifugation obtains intermediate again.
4. the compound method of barley special fertilizer according to claim 1, is characterized in that: in described filtrate, nitrogen content is 14%, phosphorus pentoxide content is 7%, potassium oxide content is 7%.
5. the compound method of barley special fertilizer according to claim 1, is characterized in that: in described step (2), and when intermediate and alkaline potassium salt react, stirring velocity is 230r/min, and the reaction times is 50min, and the pH value of reaction soln is 8.5.
6. the compound method of barley special fertilizer according to claim 1, is characterized in that: described alkaline potassium salt is potassium hydroxide.
7. the compound method of barley special fertilizer according to claim 1, is characterized in that: described medium trace element compound is calcium sulfate, zinc sulfate, magnesium sulfate, ferrous sulfate, borax and copper sulfate.
8. the compound method of barley special fertilizer according to claim 1, is characterized in that: the mol ratio of described intermediate and alkaline potassium salt is 1:1.1.
9. the compound method of barley special fertilizer according to claim 1, it is characterized in that: in described step (3), adopt heat-up rate to be that 5 DEG C/min is warming up to 28 DEG C, after dry 50min, adjustment moisture content is 4%, can obtain barley special fertilizer.
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|---|---|---|---|
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1060648A (en) * | 1990-10-08 | 1992-04-29 | 邢新华 | Polybasic fertilizer |
| CN100999312A (en) * | 2007-01-05 | 2007-07-18 | 黄尚勋 | Coproduction method of potassium dihydrogen phosphate, sulfur base composite fertilizer and aluminium polychloride |
| CN101244958A (en) * | 2007-02-14 | 2008-08-20 | 甘肃省农业科学院 | Fertilizer special for beer barley |
| WO2013055279A1 (en) * | 2011-10-13 | 2013-04-18 | Ekobalans Fenix Ab | Dewatering of phosphate precipitates |
| CN103803518A (en) * | 2014-01-24 | 2014-05-21 | 贵阳中化开磷化肥有限公司 | Method for preparing monopotassium phosphate by using wet-process phosphoric acid |
| CN104003362A (en) * | 2014-05-20 | 2014-08-27 | 贵阳中化开磷化肥有限公司 | Production method of dipotassium phosphate |
-
2015
- 2015-01-23 CN CN201510035107.4A patent/CN104591830A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1060648A (en) * | 1990-10-08 | 1992-04-29 | 邢新华 | Polybasic fertilizer |
| CN100999312A (en) * | 2007-01-05 | 2007-07-18 | 黄尚勋 | Coproduction method of potassium dihydrogen phosphate, sulfur base composite fertilizer and aluminium polychloride |
| CN101244958A (en) * | 2007-02-14 | 2008-08-20 | 甘肃省农业科学院 | Fertilizer special for beer barley |
| WO2013055279A1 (en) * | 2011-10-13 | 2013-04-18 | Ekobalans Fenix Ab | Dewatering of phosphate precipitates |
| CN103803518A (en) * | 2014-01-24 | 2014-05-21 | 贵阳中化开磷化肥有限公司 | Method for preparing monopotassium phosphate by using wet-process phosphoric acid |
| CN104003362A (en) * | 2014-05-20 | 2014-08-27 | 贵阳中化开磷化肥有限公司 | Production method of dipotassium phosphate |
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