CN104250000B - Method for co-producing fertilizer special for white paeony root during preparation of monopotassium phosphate - Google Patents
Method for co-producing fertilizer special for white paeony root during preparation of monopotassium phosphate Download PDFInfo
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- CN104250000B CN104250000B CN201410478235.1A CN201410478235A CN104250000B CN 104250000 B CN104250000 B CN 104250000B CN 201410478235 A CN201410478235 A CN 201410478235A CN 104250000 B CN104250000 B CN 104250000B
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Abstract
The invention discloses a method for co-producing fertilizer special for white paeony root during preparation of monopotassium phosphate. The method comprises three steps of raw material mixing reaction, preparation of monopotassium phosphate and preparation of the fertilizer special for the white paeony root. The fertilizer special for the white paeony root is obtained by mixing nutritional elements necessary to normal growth and development of the white paeony root, so that soil is looser; by the adding of the various nutritional elements, the health of the white paeony root can be better protected; by the adding of natural mineral substances and plant growth substances, the fertility can more effectively adjust the organ defending capacity of the white paeony root; diseases are reduced, the yield is increased, and the quality of crops is greatly improved. The fertilizer can resist diseases and disasters, and the immunity of white paeony root is enhanced.
Description
Technical field
The present invention relates to technical field of fertilizer is and in particular to a kind of potassium dihydrogen phosphate preparation coproduction is white
The method of Chinese herbaceous peony composite fertilizer special.
Background technology
Since founding of New, fertilization mode is after change big several times.At the beginning of liberation, base
Farm manure is still completely dependent on basis, promote in China later with ammonia, ammonium carbonate,
Ammonium sulfate is the low content nitrogenous fertilizer of representative, because soil at that time is extremely barren, obtains obvious
Effect of increasing production.But use the carbamide of high nitrogen-containing after several years instead, make nitrogenous, phosphorus, potassium still later into
The compound fertilizer of three kinds of a great number of elements, in the hereafter time of recent two decades, the compound fertilizer of three elements
Material increases in grain production, agricultural development is made that particularly important contribution.But these common fertilizers exist
After arable land applies, a part is rising, dissipate and outflow with water, and a part is by only therein
A part is just absorbed by crops and utilizes.Show through research：Common N,P,K fertilizers profit
It is very low with rate.Due to only applying NpK complex fertilizer for years, add company for many years
Continuous high yield, result in the serious loss of native machine matter, the serious continuation constraining yield improves,
The improvement of quality and the improvement of soil.Therefore under current environment, urgent need will be supplemented in soil
Comprise the moderate-element of sulfur, ferrum, copper, boron, zinc, molybdenum, manganese microelement, rich in aminoacid
With the organic matter of humic acidss etc., could preferably improve yield, improving quality, improve auxotype
Compound fertilizer be developing direction environment-friendly ecological full-nutrient fertilizer from now on be no longer simple list
One fertilizer variety, but collection macroelement fertilizer+secondary nutrients+trace-element fertilizer, with
When possess the quick-acting of chemical fertilizer, long-lasting, trace element and the bio-bacterial manure of organic fertilizer
Wholesomeness.Need to absorb more nutrient substance, not only in one growth cycle of the Radix Paeoniae Alba
It is the provided nitrogen of Common compound fertilizer material, phosphorus, potassium nutrition.Lack trace element can cause, plant
Slight of stature, heading is uneven, and pollination rate is low, has a strong impact on yield.Radix Paeoniae Alba dedicated fertilizer should be contained
Have the synthesises of multiple nutrients, be not nutrient single wait a great number of elements outside, also be rich in manganese, ferrum,
Zinc, etc. the necessary element of various crop.
Potassium dihydrogen phosphate, is agriculturally used as efficient phosphorus potassium complex fertilizer；Potassium dihydrogen phosphate product is extensive
It is applied to the crop of the almost all types such as all types of industrial crops, grain, melon fruits and vegetables,
Potassium dihydrogen phosphate has notable increasing both production and income, the amount of changing optimizes quality, resistant to lodging, disease and insect resistance,
Preventing and treating many excellent effects such as senilism, and have and overcome the aging absorption of plant growth later stage root system
The malnourished effect that ability declines and leads to.Potassium dihydrogen phosphate belongs to novel high density phosphorus potassium two
Elements compounding fertilizer, wherein contains phosphorus pentoxide 52% about, the dipotassium 34% about containing oxidation.
The production method of potassium dihydrogen phosphate is a lot, is substantially summarised as neutralisation, extraction, ion exchange
Method, double decomposition, direct method, crystallization process and electrolysis etc..In China, adopting production technology more
With neutralisation, secondly also have organic extraction, double decomposition, ion exchange.
Neutralisation, be caustic potash or potassium carbonate are made into 30% solution after deliver to neutralizer,
The lower phosphoric acid solution neutralization with 50% of stirring, controls temperature at 80-100 DEG C, pH is 4-5, in
Get product after filtration, concentration, crystallisation by cooling, centrifugation, drying with product, crystallization
Mother solution returns to concentration section and carries out reuse.The feature of neutralisation is that technological process is short, and technology becomes
Ripe, equipment is few, and product quality is high, and energy consumption is low, small investment.This method is with thermal phosphoric acid and potash
For raw material, production cost height is it is difficult to agriculturally apply, mainly for the production of food, medicine
With the potassium dihydrogen phosphate of technical grade, from now on this method yield have more decline, but there is no it at present
Its method can shake its product leading position in the food industry.Currently, national neutralisation phosphorus
The production capacity of acid dihydride potassium accounts for more than the 90% of total productive capacity.Organic extraction is that basis has
Machine solvent has the characteristic of different solubilities to different compounds, optionally using organic solvent
Carry out the method that extract and separate carrys out preparing potassium dihydrogen phosphate.It is at suitable organic solvent (S)
In the presence of, by potassium chloride and phosphatase reaction, the hydrochloric acid of generation is almost extracted to organic solvent
In, after split-phase, separation, potassium dihydrogen phosphate crystallizes out from aqueous phase, scrubbed, dry
Obtain final product product potassium dihydrogen phosphate, separate Mother liquor and recycle；Hydrochloric acid is by back washing agent from organic faciess
Middle back extraction out, extractant during recycle.Ion exchange is molten using potassium chloride
Liquid passes through styrene type cation exchange resin, adsorbs K+, then by di(2-ethylhexyl)phosphate from solution
Hydrogen ammonium salt solution enters line replacement by resin, prepared potassium dihydrogen phosphate, then feed liquid concentrated,
Crystallisation by cooling, centrifugation, be dried after obtain finished product potassium dihydrogen phosphate, crystalline mother solution returns to
Concentration section carries out reuse.
The preparation of potassium dihydrogen phosphate also exists at present as from the foregoing, and impurity is many, high cost, product
The problems such as purity is low, mother solution utilization rate is low, disposing mother liquor is difficult, the present inventor passes through to preparing phosphorus
The numerous studies of acid dihydride potassium product technology and list of references are not it was found that have patent document and public affairs
Open and in document, have the angle to element absorption rate from the Radix Paeoniae Alba, improving potassium dihydrogen phosphate product
Purity simultaneously by remaining mother solution pass through adjustment be prepared into the special compound state composite fertilizer of the Radix Paeoniae Alba
Technology occur.
Content of the invention
For solving above-mentioned technical problem, the invention provides a kind of potassium dihydrogen phosphate preparation coproduction is white
The preparation method of Chinese herbaceous peony composite fertilizer special, it has, and equipment requirements are low, three wastes are excluded, produce work
Skill is short, potassium dihydrogen phosphate product purity high, the Radix Paeoniae Alba composite fertilizer special of by-product can be filled by plant
Divide and absorb, compound fertilizer's nutrient proper, low production cost of collocation, there is the spies such as the value of environmental protection
Levy.
The present invention is achieved by the following technical programs：
A kind of method of potassium dihydrogen phosphate preparation coproduction Radix Paeoniae Alba composite fertilizer special, with carbamide and phosphoric acid
In molar ratio 1.3:1.5-1.8 mixes, and temperature is risen to 98-102 DEG C, stirring reaction 130min,
Separate and obtain intermediate, by intermediate and alkalescence potassium hybrid reaction, control pH value is 3.8-4.3,
Reaction terminate after obtain containing nitrogen, phosphorus, potassium mother solution, by mother solution put and cooler crystallizer in drop
Temperature crystallization, is monitored to mother solution analyzing simultaneously, when nitrogen content is 18-22%, five oxidations two
Phosphorus content is 8.2-8.6%, when potassium oxide content is 8.7-12.4, stops crystallizing and filtering, obtains
Filter cake be potassium dihydrogen phosphate, then to obtain filtrate in add the Radix Paeoniae Alba needed for element,
And take the programming rate of 5 DEG C/min filtrate is warming up to 28-32 DEG C to be dried, it is dried
After 75min, when water content is 2%, obtain Radix Paeoniae Alba composite fertilizer special finished product.
Specifically include following steps：
(1) raw material hybrid reaction：With carbamide and phosphoric acid in molar ratio 1.3:1.5-1.75 mixing, will
Temperature rises to 98-101 DEG C, and mixing speed is 60-80r/min stirring reaction 130min, separates
To intermediate；
(2) potassium dihydrogen phosphate preparation：By step 1) in the intermediate that obtains mix with alkalescence potassium
Reaction, controls pH value be 3.8-4.2, react terminate after obtain containing nitrogen, phosphorus, potassium mother solution,
Mother solution is put and decrease temperature crystalline in cooler crystallizer, mother solution is monitored analyzing simultaneously, works as nitrogen
Content is 18-21%, and phosphorus pentoxide content is 8.2-8.5%, and potassium oxide content is 8.7-12.3
During %, stop crystallizing and filtering, the filter cake obtaining is potassium dihydrogen phosphate；
(3) prepare Radix Paeoniae Alba composite fertilizer special：Then to step 2) in obtain filtrate in add
Element needed for the Radix Paeoniae Alba, and take the programming rate of 5 DEG C/min filtrate is warming up to 28-31 DEG C to enter
Row drying, after 75min is dried, when water content is 2%, obtains Radix Paeoniae Alba composite fertilizer special finished product；
Described carbamide is reacted with phosphoric acid solution for urea solid with the reaction of phosphoric acid.
The concentration of described phosphoric acid is 70-72%.
Described alkalescence potassium is potassium hydroxide.
The chilling temperature of described crystallisation by cooling is 19-22 DEG C.
Element needed for the described Radix Paeoniae Alba is boron, manganese, zinc.
Described Radix Paeoniae Alba composite fertilizer special is compound state chemical mixed fertilizer.
Described compound state chemical mixed fertilizer, contains following N P and K compound state structural formula in its composition：
Wherein, the dotted line between carbon atom and oxygen atom represents that C is former
There is coordinate bond between son and O atom.
The beneficial effects of the present invention is：
By the di(2-ethylhexyl)phosphate so that output is regulated and controled to the process conditions producing potassium dihydrogen phosphate
Hydrogen potassium product purity is high, when compensate for conventional wet phosphoric acid potassium dihydrogen phosphate preparation, impurity treatment
Difficult problem, reduces production cost, and during potassium dihydrogen phosphate preparation, leads to
Cross to raw material, temperature, the control of constituent content, obtained being prepared into Radix Paeoniae Alba specific complex
Fertile filtrate, using this filtrate prepare compound fertilizer can farthest meet the Radix Paeoniae Alba
Demand, waste liquid using the pollution decreasing environment, reduce the production cost of compound fertilizer, tool
There is higher economic worth, this Radix Paeoniae Alba dedicated fertilizer is to carry out normal growth promoter according to the Radix Paeoniae Alba
Required nutrient and proportioning, make soil more loose, add various nutrient elements, more
The health protecting the Radix Paeoniae Alba, add natural mineral matter and plant growth substance, fertility more can be effective more
Adjust the body defensive ability/resistance ability of the Radix Paeoniae Alba, mitigate disease, improve yield, substantially improve crop quality.
Disease-resistant can be combated a natural disaster using this product, improve the immunity of the Radix Paeoniae Alba itself.
By the adjustment to processing parameter, carbamide generates urea phosphate with phosphatase reaction, and phosphorus
The environment that sour urea exists in phosphoric acid
Under, can be formed by certain temperature control againIntermediate-ion,
This intermediate-ion can be chelated with centering element compound and form multielement intermediate-ion, and then
Can continue to the compound negatively charged with other or ion forms chelate, improve in double salt
Constituent content, and then the nutrient content in the double salt of this ion presence can be adjusted so that preparing
Compound fertilizer out disclosure satisfy that the demand to nutrient for the Radix Paeoniae Alba.
Specific embodiment
With reference to embodiments technical scheme is further described, but claimed
Scope be not limited to described.
Reaction principle explanation：
Carbamide generates urea phosphate, urea phosphate meeting under containing phosphoric acid and hot environment with phosphatase reaction
Form the ion double salt that a kind of positive and negative charge phase attracts, and urea phosphate ion double salt exists in phosphoric acid
In the environment of, H therein2NCONH3 +Ion is close with phosphoric acid, forms C → O coordinate bond
Intermediate-ion, as CO5PN2H8 +Ion, and then make to contain in a large number in urea phosphate intermediate
H2PO4 -And CO5PN2H8 +Ion, when adding excessive and appropriate potassium ion, phosphoric acid
Two hydrogen radical and potassium ion form potassium dihydrogen phosphate crystal and are precipitated, unnecessary potassium ion with
CO5PN2H8 +Ionic reaction, and displace part NH4+ so that containing in solution
CO5PNH4K+Double salt ion, by adjusting to element, being eventually adding dried filtrate can obtain
Obtain compound fertilizer.Concrete reaction equation is as follows：
Reaction equation one：
H2PO3+CO(NH2)2—CO(NH2)2·H3PO4
Reaction equation two：
CO(NH2)2·H3PO4—H2NCONH3 ++H2PO4 -
Reaction equation three：
H2PO4 -+K+—KH2PO4
Reaction equation four:
Reaction equation five：
With reference to embodiment, the present invention is further elaborated：
Embodiment 1
A kind of method of potassium dihydrogen phosphate preparation coproduction Radix Paeoniae Alba composite fertilizer special, the method include with
Lower step：
(1) raw material hybrid reaction：With carbamide and phosphoric acid in molar ratio 1.3:1.5 mixing, by temperature
Rise to 98 DEG C, mixing speed is 60-80r/min stirring reaction 130min, separates and obtains intermediate；
(2) potassium dihydrogen phosphate preparation：By step 1) in the intermediate that obtains mix with alkalescence potassium
Reaction, control pH value be 3.8, reaction terminate after obtain containing nitrogen, phosphorus, potassium mother solution, will
Mother solution is put and decrease temperature crystalline in cooler crystallizer, mother solution is monitored analyzing, when nitrogen contains simultaneously
Measure as 18%, phosphorus pentoxide content is 8.2%, when potassium oxide content is 8.7%, stop knot
Crystalline substance simultaneously filters, and the filter cake obtaining is potassium dihydrogen phosphate；
(3) prepare Radix Paeoniae Alba composite fertilizer special：Then to step 2) in obtain filtrate in add
Element needed for the Radix Paeoniae Alba, and take the programming rate of 5 DEG C/min filtrate is warming up to 28 DEG C to carry out
It is dried, after 75min is dried, when water content is 2%, obtain Radix Paeoniae Alba composite fertilizer special finished product；
Embodiment 2
A kind of method of potassium dihydrogen phosphate preparation coproduction Radix Paeoniae Alba composite fertilizer special, the method include with
Lower step：
(1) raw material hybrid reaction：With carbamide and phosphoric acid in molar ratio 1.3:1.55 mixing, by temperature
Degree rises to 99 DEG C, and mixing speed is 60-80r/min stirring reaction 130min, separates and obtains centre
Body；
(2) potassium dihydrogen phosphate preparation：By step 1) in the intermediate that obtains mix with alkalescence potassium
Reaction, control pH value be 3.9, reaction terminate after obtain containing nitrogen, phosphorus, potassium mother solution, will
Mother solution is put and decrease temperature crystalline in cooler crystallizer, mother solution is monitored analyzing, when nitrogen contains simultaneously
Measure as 18.5%, phosphorus pentoxide content is 8.3%, when potassium oxide content is 8.8%, stop
Crystallize and filter, the filter cake obtaining is potassium dihydrogen phosphate；
(3) prepare Radix Paeoniae Alba composite fertilizer special：Then to step 2) in obtain filtrate in add
Element needed for the Radix Paeoniae Alba, and take the programming rate of 5 DEG C/min filtrate is warming up to 29 DEG C to carry out
It is dried, after 75min is dried, when water content is 2%, obtain Radix Paeoniae Alba composite fertilizer special finished product；
Embodiment 3
A kind of method of potassium dihydrogen phosphate preparation coproduction Radix Paeoniae Alba composite fertilizer special, the method include with
Lower step：
(1) raw material hybrid reaction：With carbamide and phosphoric acid in molar ratio 1.3:1.6 mixing, by temperature
Rise to 100 DEG C, mixing speed is 60-80r/min stirring reaction 130min, separates and obtains intermediate；
(2) potassium dihydrogen phosphate preparation：By step 1) in the intermediate that obtains mix with alkalescence potassium
Reaction, control pH value be 3.9, reaction terminate after obtain containing nitrogen, phosphorus, potassium mother solution, will
Mother solution is put and decrease temperature crystalline in cooler crystallizer, mother solution is monitored analyzing, when nitrogen contains simultaneously
Measure as 19.5%, phosphorus pentoxide content is 8.35%, when potassium oxide content is 9.1%, stop
Crystallize and filter, the filter cake obtaining is potassium dihydrogen phosphate；
(3) prepare Radix Paeoniae Alba composite fertilizer special：Then to step 2) in obtain filtrate in add
Element needed for the Radix Paeoniae Alba, and take the programming rate of 5 DEG C/min filtrate is warming up to 30 DEG C to carry out
It is dried, after 75min is dried, when water content is 2%, obtain Radix Paeoniae Alba composite fertilizer special finished product；
Embodiment 4
A kind of method of potassium dihydrogen phosphate preparation coproduction Radix Paeoniae Alba composite fertilizer special, the method include with
Lower step：
(1) raw material hybrid reaction：With carbamide and phosphoric acid in molar ratio 1.3:1.65 mixing, by temperature
Degree rises to 101 DEG C, and mixing speed is 60-80r/min stirring reaction 130min, separates and obtains centre
Body；
(2) potassium dihydrogen phosphate preparation：By step 1) in the intermediate that obtains mix with alkalescence potassium
Reaction, control pH value be 4, reaction terminate after obtain containing nitrogen, phosphorus, potassium mother solution, by mother
Liquid is put and decrease temperature crystalline in cooler crystallizer, mother solution is monitored analyzing simultaneously, works as nitrogen content
For 20.5%, phosphorus pentoxide content is 8.3%, when potassium oxide content is 9.6%, stops knot
Crystalline substance simultaneously filters, and the filter cake obtaining is potassium dihydrogen phosphate；
(3) prepare Radix Paeoniae Alba composite fertilizer special：Then to step 2) in obtain filtrate in add
Element needed for the Radix Paeoniae Alba, and take the programming rate of 5 DEG C/min filtrate is warming up to 30 DEG C to carry out
It is dried, after 75min is dried, when water content is 2%, obtain Radix Paeoniae Alba composite fertilizer special finished product；
Embodiment 5
A kind of method of potassium dihydrogen phosphate preparation coproduction Radix Paeoniae Alba composite fertilizer special, the method include with
Lower step：
(1) raw material hybrid reaction：With carbamide and phosphoric acid in molar ratio 1.3:1.72 mixing, by temperature
Degree rises to 99 DEG C, and mixing speed is 60-80r/min stirring reaction 130min, separates and obtains centre
Body；
(2) potassium dihydrogen phosphate preparation：By step 1) in the intermediate that obtains mix with alkalescence potassium
Reaction, control pH value be 4.1, reaction terminate after obtain containing nitrogen, phosphorus, potassium mother solution, will
Mother solution is put and decrease temperature crystalline in cooler crystallizer, mother solution is monitored analyzing, when nitrogen contains simultaneously
Measure as 18.9%, phosphorus pentoxide content is 8.3%, when potassium oxide content is 9.2%, stop
Crystallize and filter, the filter cake obtaining is potassium dihydrogen phosphate；
(3) prepare Radix Paeoniae Alba composite fertilizer special：Then to step 2) in obtain filtrate in add
Element needed for the Radix Paeoniae Alba, and take the programming rate of 5 DEG C/min filtrate is warming up to 29 DEG C to carry out
It is dried, after 75min is dried, when water content is 2%, obtain Radix Paeoniae Alba composite fertilizer special finished product；
Embodiment 6
A kind of method of potassium dihydrogen phosphate preparation coproduction Radix Paeoniae Alba composite fertilizer special, the method include with
Lower step：
(1) raw material hybrid reaction：With carbamide and phosphoric acid in molar ratio 1.3:1.73 mixing, by temperature
Degree rises to 101 DEG C, and mixing speed is 60-80r/min stirring reaction 130min, separates and obtains centre
Body；
(2) potassium dihydrogen phosphate preparation：By step 1) in the intermediate that obtains mix with alkalescence potassium
Reaction, control pH value be 4.2, reaction terminate after obtain containing nitrogen, phosphorus, potassium mother solution, will
Mother solution is put and decrease temperature crystalline in cooler crystallizer, mother solution is monitored analyzing, when nitrogen contains simultaneously
Measure as 19.9%, phosphorus pentoxide content is 8.1%, when potassium oxide content is 10.2%, stop
Crystallize and filter, the filter cake obtaining is potassium dihydrogen phosphate；
(3) prepare Radix Paeoniae Alba composite fertilizer special：Then to step 2) in obtain filtrate in add
Element needed for the Radix Paeoniae Alba, and take the programming rate of 5 DEG C/min filtrate is warming up to 31 DEG C to carry out
It is dried, after 75min is dried, when water content is 2%, obtain Radix Paeoniae Alba composite fertilizer special finished product；
With reference to concrete test example, the product of the present invention and technique effect are made further
Bright.
Experimental example 1
The embodiment of the present invention 1, embodiment 2, embodiment 3, embodiment 4, embodiment 5, enforcement
Example 6, in the Radix Paeoniae Alba composite fertilizer special prepared detected according to GB1887-2002 standard,
Its result is as shown in table 1：
The detection of content of element of table 1 Radix Paeoniae Alba composite fertilizer special of the present invention
| Detection project | Criterion of acceptability | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 |
| N P and K | 30% | 34.9% | 35.6% | 36.95% | 38.4% | 36.4% | 38.2% |
| Nitrogen | 12% | 18% | 18.3% | 19.5% | 20.5% | 18.9% | 19.9% |
| Phosphorus | 8% | 8.2% | 8.5% | 8.35% | 8.3% | 8.3% | 8.1% |
| Potassium | 10% | 8.7% | 8.8% | 9.1% | 9.6% | 9.2% | 10.2% |
| Water content | ≤ 2% | 2% | 2% | 2% | 2% | 2% | 2% |
By can learn in table 1 present invention preparation Radix Paeoniae Alba composite fertilizer special constituent content not
Only reach criterion of acceptability, and be much better than criterion of acceptability, illustrated that this compound fertilizer can meet the Radix Paeoniae Alba
Nutrient demand, technique effect has and significantly improves.
Experimental example 2
The embodiment of the present invention 1, embodiment 2, embodiment 3, embodiment 4, embodiment 5, reality
Apply example 6, in the potassium dihydrogen phosphate product prepared carry out by the detection method of GBT278-1997
Detection.
Table 2 potassium dihydrogen phosphate product purity detecting of the present invention
As can be seen from Table 2, the potassium dihydrogen phosphate that technical scheme is produced is not
Only reach criterion of acceptability, and the purity of product is also higher, illustrated that this method prepares di(2-ethylhexyl)phosphate
Hydrogen potassium product has and significantly improves.
Experimental example 3
According to the Radix Paeoniae Alba to the absorption of constituent content and and its growing state, to Radix Paeoniae Alba composite fertilizer special
Compare test with common fertilizer.With 9 Radix Paeoniae Alba seedling as subjects, be numbered respectively A,
B, C, D, E, F, G, H, I, the Radix Paeoniae Alba seedling to tri- labels of A, B, C are applied common
Fertilizer, applies embodiment respectively to the Radix Paeoniae Alba seedling of six labels such as D, E, F, G, H, I
1st, embodiment 2, embodiment 3, embodiment 4, embodiment 5, prepared in embodiment 6
Radix Paeoniae Alba special fertilizer, comparative test result is as shown in table 2：
Table 3 applies common fertilizer and Radix Paeoniae Alba composite fertilizer special to Radix Paeoniae Alba element absorption rate to when
Impact to Radix Paeoniae Alba growth
| N% | P% | K% | B% | Mn% | Ze% | Upgrowth situation | |
| A | 7% | 7% | 6% | No | No | No | Poor growth |
| B | 7% | 6% | 6% | No | No | No | Poor growth |
| C | 6% | 7% | 6% | No | No | No | Poor growth |
| D | 16% | 8% | 8.5% | 4% | 4% | 4% | Normally |
| E | 15% | 8.1% | 8.3% | 4% | 3% | 3% | Normally |
| F | 15.5% | 7.9% | 8.1% | 4% | 3% | 4% | Normally |
| G | 17% | 8.2% | 8% | 3% | 4% | 3% | Normally |
| H | 16.5% | 8.1% | 8.2% | 3% | 3% | 4% | Normally |
| I | 16.4% | 7.9% | 8.1% | 4% | 3% | 4% | Normally |
The Radix Paeoniae Alba composite fertilizer special of present invention preparation can be by the Radix Paeoniae Alba as can be seen from the above table
Sufficiently absorb, and also rich in the nutrient needed for the Radix Paeoniae Alba such as B, Mn, Ze, to the Radix Paeoniae Alba
Normal growth provide guarantee, improve economic benefit.
Claims (9)
1. a kind of potassium dihydrogen phosphate coproduction Radix Paeoniae Alba composite fertilizer special method it is characterised in that：With carbamide and phosphoric acid in molar ratio 1.3:1.5-1.8 mixing，Temperature is risen to 98-102 DEG C，Stirring reaction 130min，Separate and obtain intermediate，By intermediate and alkalescence potassium hybrid reaction，Control ph is 3.8-4.3，Reaction obtains containing nitrogen after terminating、Phosphorus、The mother solution of potassium，Mother solution is placed in decrease temperature crystalline in cooler crystallizer，Mother solution is monitored analyzing simultaneously，When nitrogen content is 18-22%，Phosphorus pentoxide content is 8.2-8.6%，When potassium oxide content is 8.7-12.4%，Stop crystallizing and filtering，The filter cake obtaining is potassium dihydrogen phosphate，Then add the element needed for the Radix Paeoniae Alba in the filtrate obtaining，And take the programming rate of 5 DEG C/min filtrate is warming up to 28-32 DEG C to be dried，After 75min is dried，When water content is 2%，Obtain Radix Paeoniae Alba composite fertilizer special finished product.
2. potassium dihydrogen phosphate coproduction Radix Paeoniae Alba composite fertilizer special method according to claim 1 is it is characterised in that the method comprises the following steps：
(1) raw material hybrid reaction：With carbamide and phosphoric acid in molar ratio 1.3:1.5-1.75 mixes, and temperature is risen to 98-101 DEG C, and mixing speed is 60-80r/min stirring reaction 130min, separates and obtains intermediate；
(2) potassium dihydrogen phosphate preparation：By step 1) in the intermediate that obtains and alkalescence potassium hybrid reaction, control ph is 3.8-4.2, reaction terminate after obtain containing nitrogen, phosphorus, potassium mother solution, mother solution is placed in decrease temperature crystalline in cooler crystallizer, mother solution is monitored analyzing, when nitrogen content is 18-21% simultaneously, phosphorus pentoxide content is 8.2-8.5%, when potassium oxide content is 8.7-12.3%, stop crystallizing and filtering, the filter cake obtaining is potassium dihydrogen phosphate；
(3) prepare Radix Paeoniae Alba composite fertilizer special：Then to step 2) in add element needed for the Radix Paeoniae Alba in the filtrate that obtains, and take the programming rate of 5 DEG C/min filtrate is warming up to 28-31 DEG C to be dried, after 75min is dried, when water content is 2%, obtain Radix Paeoniae Alba composite fertilizer special finished product.
3. potassium dihydrogen phosphate coproduction Radix Paeoniae Alba composite fertilizer special method according to claim 1 and 2 it is characterised in that：Described carbamide is reacted with phosphoric acid solution for urea solid with the reaction of phosphoric acid.
4. potassium dihydrogen phosphate coproduction Radix Paeoniae Alba composite fertilizer special method according to claim 1 and 2 it is characterised in that：The concentration of described phosphoric acid is 70-72%.
5. potassium dihydrogen phosphate coproduction Radix Paeoniae Alba composite fertilizer special method according to claim 1 and 2 it is characterised in that：Described alkalescence potassium is potassium hydroxide.
6. potassium dihydrogen phosphate coproduction Radix Paeoniae Alba composite fertilizer special method according to claim 1 and 2 it is characterised in that：The chilling temperature of described decrease temperature crystalline is 19-22 DEG C.
7. potassium dihydrogen phosphate coproduction Radix Paeoniae Alba composite fertilizer special method according to claim 1 and 2 it is characterised in that：Element needed for the described Radix Paeoniae Alba is boron, manganese, zinc.
8. potassium dihydrogen phosphate coproduction Radix Paeoniae Alba composite fertilizer special method according to claim 1 and 2 it is characterised in that：Described Radix Paeoniae Alba composite fertilizer special is compound state chemical mixed fertilizer.
9. potassium dihydrogen phosphate coproduction Radix Paeoniae Alba composite fertilizer special method according to claim 8 it is characterised in that：Described compound state chemical mixed fertilizer, contains following N P and K compound state structural formula in its composition：
Wherein, the dotted line between carbon atom and oxygen atom represents there is coordinate bond between C atom and O atom.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410478235.1A CN104250000B (en) | 2014-09-19 | 2014-09-19 | Method for co-producing fertilizer special for white paeony root during preparation of monopotassium phosphate |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410478235.1A CN104250000B (en) | 2014-09-19 | 2014-09-19 | Method for co-producing fertilizer special for white paeony root during preparation of monopotassium phosphate |
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| CN104250000A CN104250000A (en) | 2014-12-31 |
| CN104250000B true CN104250000B (en) | 2017-02-08 |
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| CN201410478235.1A Expired - Fee Related CN104250000B (en) | 2014-09-19 | 2014-09-19 | Method for co-producing fertilizer special for white paeony root during preparation of monopotassium phosphate |
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| 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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