CN106348855A - Preparation method of compound controlled-release chemical fertilizer - Google Patents
Preparation method of compound controlled-release chemical fertilizer Download PDFInfo
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- CN106348855A CN106348855A CN201610720748.8A CN201610720748A CN106348855A CN 106348855 A CN106348855 A CN 106348855A CN 201610720748 A CN201610720748 A CN 201610720748A CN 106348855 A CN106348855 A CN 106348855A
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- China
- Prior art keywords
- chemical fertilizer
- preparation
- slow release
- composite slow
- dried
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/30—Layered or coated, e.g. dust-preventing coatings
Abstract
The invention relates to a preparation method of compound controlled-release chemical fertilizer. The preparation method comprises the following steps: preparing dry chemical fertilizer particles, namely in parts by weight, mixing starch, hydroxylated modified lecithin and seaweed functional master batch with peanut oil to obtain mixed liquid for later use; uniformly spraying the mixed liquid on the surfaces of the dry chemical fertilizer particles by adopting an air-blast atomizing manner; and mixing and stirring the chemical fertilizer particles with castor oil, so that the compound controlled-release chemical fertilizer is obtained. Coatings used in the invention are biodegradable respectively, and compared with an existing wrapping film adopting various synthetic macromolecule adhesives, defects that the synthetic macromolecules are non-biodegradable and the soil and environment are polluted can be made up. The preparation method provided by the invention is simple in technology, easy in operation, short in technological cycle and low in energy consumption, and waste is not produced, thereby being accordant with concepts of atomic economy and environmental protection and beneficial to industrialized popularization and application.
Description
Technical field
The invention belongs to technical field of fertilizer, more particularly, to a kind of reliable and stable, low cost, total nutrient is high, material therefor
Biodegradable, do not change the preparation method of the composite slow release chemical fertilizer of soil environment.
Background technology
Chemical fertilizer occupies very important status in agricultural production.China is as a large agricultural country, right in agricultural production
The demand of chemical fertilizer is very high, and chemical fertilizer has become as maximum material investment in agricultural production according to statistics, accounts for full scale production and props up
50% about going out.The fertilizer production of China and usage amount are the first in the world, and wherein yield accounts for the 20% of world Fertilizer yield,
Usage amount has accounted for the 28% of world Fertilizer consumption.
However, the property due to chemical fertilizer and the requirement to soil environment, soil physical properties is then led to constantly to deteriorate,
So not only affect the raising of crops, and environment be also result in huge pollution.
Therefore, improve chemical fertilizer utilization ratio, reduce fertilising excessive, it is to avoid environmental pollution has become as Developing Sustainable Agriculture and compels
Be essential problem to be solved.Slow release fertilizer just arises at the historic moment also known as release and release control fertilizer (control release fertilizers).
Slow release chemical fertilizer has following advantage: 1) reduces nutrient loss, improves chemical fertilizer utilization ratio.2) make to cause plant not in soil
Can be reduced with biological fixation effect using the chemistry of form.3) the nitrogen unit decreasing denitrification and nitrogen Nitrification and causing
Element loss.
However, existing slow release chemical fertilizer there are the following problems: 1) integument film forming matter mostly is synthesising macromolecule copolymer, is difficult
Biodegradation.2) directly chemical adhesive parcel, slow release cycle is short or slow release are added using pure starch or various plant straw powder
Speed is difficult to control to.3) expensive such as silane, titanate esters or Aluminate etc. the coupling agent of coating matter used by, high cost is unfavorable for
Large-scale promotion application.
Content of the invention
It is an object of the invention to, overcome the deficiencies in the prior art, a kind of reliable and stable, low cost be provided, total nutrient is high,
Material therefor is biodegradable, does not change the preparation method of the composite slow release chemical fertilizer of soil environment.
To achieve these goals, the present invention employs the following technical solutions:
A kind of preparation method of composite slow release chemical fertilizer, is dried chemical fertilizer granule including preparation, comprises the following steps:
1) by weight, by the starch of 100-120 part, 120-150 part hydroxylating modified lecithin, 50-60 part Sargassum function
Master batch and 200 portions of Oleum Arachidis hypogaeae semen 120-150 DEG C, frequency be 85mhz ultrasonic vibration 60-75min, obtain mixing liquid, standby；
2) mixing liquid prepared by step 1) is being dried chemical fertilizer particle surface, spraying pressure using air-blast atomizing mode even application
Power is 0.55-0.65mpa, and temperature is cooled to 40-50 DEG C by the chemical fertilizer granule after being coated with；
3) by step 2) chemical fertilizer granule after the coating that obtains and Oleum Ricini mix and blend, obtain composite slow release chemical fertilizer.
In the technical program, with existing use amylan compared with powder timber residue manufacture slow-release fertilizer casing,
The present invention can make up because powder timber residue composition granule and space excessive to chemical fertilizer wrap up uneven, slow-release time is short and not easily-controllable
The deficiency of system.The step 2 of the present invention) to be coated on chemical fertilizer granule surface be the first clad, the clad of step 3) preparation is the
Two clads, the second clad like switching layer, by the moisture dissolution with hydrogen bond association in hydrophilic group and extraneous soil,
The passage of outwards slow release is provided for chemical fertilizer, reaches the speed controlling chemical fertilizer release, thus obtaining controllable sustained release rate
Slow release chemical fertilizer.The method is applicable to the preparation of various water-soluble slow-releasing chemical fertilizer, and used by the first clad and the second clad
Material is completely biodegradable material, pollution-free to soil, does not change soil environment.
Preferably, step 2) in mixing liquid be 1.35-1.5:1 with the mass ratio that chemical fertilizer granule is dried.
Preferably, the chemical fertilizer granule after being coated with step 3) is 1:3-4.2 with the mass ratio of Oleum Ricini.
Preferably, mixing speed is 2500-3000r/min in step 3), temperature is 90-95 DEG C, and mixing time is 25-
35min.
Preferably, the particle diameter that chemical fertilizer granule is dried is 2-4.5mm.
Preferably, the preparation method of the hydroxylating modified lecithin described in step 1) is: lecithin with concentration is
The lactic acid solution mix homogeneously post-heating stirring of 50-60wt%, wherein said lecithin is 100 with the mass ratio of lactic acid solution:
(4-6), heating-up temperature be 70-80 DEG C, heat time heating time 40-60min；It is gradually added into quality to reactant liquor during heated and stirred
Concentration for described lecithin 20-25% is the hydrogen peroxide solution of 30wt%；To reactant liquor Deca hydrogen-oxygen after heated and stirred terminates
Change sodium solution to neutral, hydroxylating modified lecithin after being finally vacuum dried, is obtained.
Preferably, in step 2) terminate after, by the dolomite dusts of the chemical fertilizer granule after cooling and its quality 0.2-0.5%
Mix and blend 15min.
Preferably, starch used is that corn starch, potato starch, wheaten starch, green starch or Rhizoma Nelumbinis are formed sediment in step 1)
Powder.
Preferably, the preparation method of Sargassum functional agglomerate is as follows in step 1): in vacuum environment, Sargassum is placed in purple
Shine 3-10 days under light lamp；Then bake 3-5min at 125-185 DEG C, put into 10min in -18 DEG C to -22 DEG C of freezing environment；?
Afterwards with putting into standing 2 days in ethanol, after vacuum drying and grinding, prepared Sargassum functional agglomerate.
The invention has the beneficial effects as follows: manufacture slow-release fertilizer casing phase with existing use amylan with powder timber residue
Can make up because of powder timber residue composition granule than, the present invention and space is excessive chemical fertilizer is wrapped up uneven, slow-release time is short and not
Manageable deficiency.The step 2 of the present invention) it is coated on chemical fertilizer granule surface for the first clad, the clad of step 3) preparation
For the second clad, the second clad like switching layer, by the moisture in hydrophilic group and extraneous soil with hydrogen bond association
Dissolution, provides the passage of outwards slow release, reaches the speed controlling chemical fertilizer release for chemical fertilizer, thus obtaining controllable slow release speed
The slow release chemical fertilizer of rate.The method is applicable to the preparation of various water-soluble slow-releasing chemical fertilizer, and the first clad and the second clad
Material therefor is completely biodegradable material, pollution-free to soil, does not change soil environment.Coating used all can be given birth to
Thing is degraded, with existing do parcel glued membrane using various synthesis macromolecular adhesive compared with, can make up synthesis macromolecule can not be biological
Degraded, the deficiency to soil and environmental pollution.The process is simple of the present invention, easy to operate, technological cycle is short, and energy consumption is low,
And do not produce garbage, meet the theory of atom economy environmental protection, beneficial to industrial application.
Specific embodiment
Technical scheme in the embodiment of the present invention will be carried out with clear, complete description below it is clear that described enforcement
Example is only a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, this area is common
All other embodiment that technical staff is obtained under the premise of not making creative work, broadly falls into the model of present invention protection
Enclose.
Embodiment 1
A kind of preparation method of composite slow release chemical fertilizer, is dried chemical fertilizer granule including preparation, and the particle diameter that chemical fertilizer granule is dried is 2-
4.5mm, comprises the following steps:
1) by weight, by 100 parts of wheaten starch, 120 parts of hydroxylating modified lecithin, 50 parts of Sargassum functional agglomerates with
200 parts of Semen Maydis oil 120 DEG C, frequency be 85mhz ultrasonic vibration 60min, obtain mixing liquid, standby；Hydroxylating modification lecithin
The preparation method of fat is: the lactic acid solution that lecithin and concentration are 60wt% mixs homogeneously post-heating stirring, wherein said lecithin
The mass ratio of fat and lactic acid solution is 100:6, and heating-up temperature is 80 DEG C, heat time heating time 60min；During heated and stirred to
Reactant liquor is gradually added into the hydrogen peroxide solution that the concentration that quality is described lecithin 25% is 30wt%；After heated and stirred terminates to
Reactant liquor Deca sodium hydroxide solution, to neutral, is obtained hydroxylating modified lecithin after being finally vacuum dried；
The preparation method of Sargassum functional agglomerate is as follows: in vacuum environment, Sargassum is placed under ultraviolet light and shines 3 days；Then 125
Bake 3min at DEG C, put into 10min in -18 DEG C of freezing environment；Finally with put in ethanol stand 2 days, through vacuum drying and
After grinding, prepared Sargassum functional agglomerate；
2) mixing liquid prepared by step 1) is being dried chemical fertilizer particle surface, spraying pressure using air-blast atomizing mode even application
Power is 0.55mpa, and temperature is cooled to 40 DEG C by the chemical fertilizer granule after being coated with, by the chemical fertilizer granule after cooling and its quality
0.2% dolomite dusts mix and blend 15min；Mixing liquid is 1.35:1 with the mass ratio that chemical fertilizer granule is dried
3) by step 2) chemical fertilizer granule after the coating that obtains and Oleum Ricini mix and blend, mixing speed is 2500r/min, temperature
For 90 DEG C, mixing time is 25min, obtains composite slow release chemical fertilizer；Chemical fertilizer granule after coating is 1 with the mass ratio of Oleum Ricini:
3.
Embodiment 2
A kind of preparation method of composite slow release chemical fertilizer, is dried chemical fertilizer granule including preparation, and the particle diameter that chemical fertilizer granule is dried is 2-
4.5mm, comprises the following steps:
1) by weight, by 110 parts of green starch, 135 parts of hydroxylating modified lecithin, 55 parts of Sargassum functional agglomerates with
200 parts of Semen Maydis oil 130 DEG C, frequency be 85mhz ultrasonic vibration 65min, obtain mixing liquid, standby；Hydroxylating modification lecithin
The preparation method of fat is: the lactic acid solution that lecithin and concentration are 55wt% mixs homogeneously post-heating stirring, wherein said lecithin
The mass ratio of fat and lactic acid solution is 100:5, and heating-up temperature is 75 DEG C, heat time heating time 50min；To anti-during heated and stirred
Concentration that quality is described lecithin 22% is the hydrogen peroxide solution of 30wt% to answer liquid to be gradually added into；To anti-after heated and stirred terminates
Answer drop hydro-oxidation sodium solution to neutral, hydroxylating modified lecithin after being finally vacuum dried, is obtained；
The preparation method of Sargassum functional agglomerate, as follows in vacuum environment, Sargassum is placed under ultraviolet light and shines 5 days；Then 165
Bake 4min at DEG C, put into 10min in -20 DEG C of freezing environment；Finally with put in ethanol stand 2 days, through vacuum drying and
After grinding, prepared Sargassum functional agglomerate；
2) mixing liquid prepared by step 1) is being dried chemical fertilizer particle surface, spraying pressure using air-blast atomizing mode even application
Power is 0.58mpa, and temperature is cooled to 45 DEG C by the chemical fertilizer granule after being coated with, by the chemical fertilizer granule after cooling and its quality
0.3% dolomite dusts mix and blend 15min；Mixing liquid is 1.45:1 with the mass ratio that chemical fertilizer granule is dried
3) by step 2) chemical fertilizer granule after the coating that obtains and Oleum Ricini mix and blend, mixing speed is 2800r/min, temperature
For 93 DEG C, mixing time is 28min, obtains composite slow release chemical fertilizer；Chemical fertilizer granule after coating is 1 with the mass ratio of Oleum Ricini:
3.6.
Embodiment 3
A kind of preparation method of composite slow release chemical fertilizer, is dried chemical fertilizer granule including preparation, and the particle diameter that chemical fertilizer granule is dried is 2-
4.5mm, comprises the following steps:
1) by weight, by 100 parts of Rhizoma Nelumbinis starch, 150 parts of hydroxylating modified lecithin, 60 parts of Sargassum functional agglomerates and 200
Part Semen Maydis oil 150 DEG C, frequency be 85mhz ultrasonic vibration 75min, obtain mixing liquid, standby；Hydroxylating modified lecithin
Preparation method is: the lactic acid solution that lecithin and concentration are 50wt% mixs homogeneously post-heating stirring, wherein said lecithin with
The mass ratio of lactic acid solution be 100:4, heating-up temperature be 70 DEG C, heat time heating time 40min；To reactant liquor during heated and stirred
It is gradually added into the hydrogen peroxide solution that the concentration that quality is described lecithin 20% is 30wt%；To reactant liquor after heated and stirred terminates
Deca sodium hydroxide solution, to neutral, is obtained hydroxylating modified lecithin after being finally vacuum dried；
The preparation method of Sargassum functional agglomerate, as follows in vacuum environment, Sargassum is placed under ultraviolet light and shines 10 days；Then 185
Bake 5min at DEG C, put into 10min in -22 DEG C of freezing environment；Finally with put in ethanol stand 2 days, through vacuum drying and
After grinding, prepared Sargassum functional agglomerate；
2) mixing liquid prepared by step 1) is being dried chemical fertilizer particle surface, spraying pressure using air-blast atomizing mode even application
Power is 0.65mpa, and temperature is cooled to 50 DEG C by the chemical fertilizer granule after being coated with, by the chemical fertilizer granule after cooling and its quality
0.5% dolomite dusts mix and blend 15min；Mixing liquid is 1.5:1 with the mass ratio that chemical fertilizer granule is dried
3) by step 2) chemical fertilizer granule after the coating that obtains and Oleum Ricini mix and blend, mixing speed is 3000r/min, temperature
For 95 DEG C, mixing time is 35min, obtains composite slow release chemical fertilizer；Chemical fertilizer granule after coating is 1 with the mass ratio of Oleum Ricini:
4.2.
It should be appreciated that to those skilled in the art, can be improved according to the above description or be become
Change, and all these modifications and variations all should belong to the protection domain of claims of the present invention.
Claims (9)
1. a kind of preparation method of composite slow release chemical fertilizer, is dried chemical fertilizer granule including preparation it is characterised in that including following walking
Rapid:
1) by weight, by the starch of 100-120 part, 120-150 part hydroxylating modified lecithin, 50-60 part Sargassum function
Master batch and 200 portions of Oleum Arachidis hypogaeae semen 120-150 DEG C, frequency be 85mhz ultrasonic vibration 60-75min, obtain mixing liquid, standby；
2) mixing liquid prepared by step 1) is being dried chemical fertilizer particle surface, spraying pressure using air-blast atomizing mode even application
Power is 0.55-0.65mpa, and temperature is cooled to 40-50 DEG C by the chemical fertilizer granule after being coated with；
3) by step 2) chemical fertilizer granule after the coating that obtains and Oleum Ricini mix and blend, obtain composite slow release chemical fertilizer.
2. a kind of preparation method of composite slow release chemical fertilizer according to claim 1 is it is characterised in that step 2) in mixed liquor
Body is 1.35-1.5:1 with the mass ratio that chemical fertilizer granule is dried.
3. after a kind of preparation method of composite slow release chemical fertilizer according to claim 1 is it is characterised in that be coated with step 3)
The mass ratio of chemical fertilizer granule and Oleum Ricini be 1:3-4.2.
4. a kind of preparation method of composite slow release chemical fertilizer according to claim 1 is it is characterised in that stir speed in step 3)
Spend for 2500-3000r/min, temperature is 90-95 DEG C, mixing time is 25-35min.
5. a kind of preparation method of the composite slow release chemical fertilizer according to claim 1 or 2 or 3 is it is characterised in that be dried chemical fertilizer
The particle diameter of granule is 2-4.5mm.
6. a kind of preparation method of composite slow release chemical fertilizer according to claim 1 is it is characterised in that described in step 1)
The preparation method of hydroxylating modified lecithin is: the lactic acid solution that lecithin and concentration are 50-60wt% mixs homogeneously post-heating
Stirring, wherein said lecithin is 100:(4-6 with the mass ratio of lactic acid solution), heating-up temperature is 70-80 DEG C, heat time heating time
40-60min；Being gradually added into, to reactant liquor, the concentration that quality is described lecithin 20-25% during heated and stirred is 30wt%
Hydrogen peroxide solution；To reactant liquor Deca sodium hydroxide solution to neutral after heated and stirred terminates, make after being finally vacuum dried
Obtain hydroxylating modified lecithin.
7. a kind of preparation method of composite slow release chemical fertilizer according to claim 1 is it is characterised in that in step 2) terminate
Afterwards, by the dolomite dusts mix and blend 15min of the chemical fertilizer granule after cooling and its quality 0.2-0.5%.
8. a kind of preparation method of composite slow release chemical fertilizer according to claim 1 is it is characterised in that shallow lake used in step 1)
Powder is corn starch, potato starch, wheaten starch, green starch or Rhizoma Nelumbinis starch.
9. a kind of preparation method of composite slow release chemical fertilizer according to claim 1 is it is characterised in that Sargassum work(in step 1)
The preparation method of energy master batch is as follows: in vacuum environment, Sargassum is placed under ultraviolet light and shines 3-10 days；Then at 125-185 DEG C
Bake 3-5min down, put into 10min in -18 DEG C to -22 DEG C of freezing environment；Finally with putting into standing 2 days in ethanol, through vacuum
After being dried and grinding, prepared Sargassum functional agglomerate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610720748.8A CN106348855A (en) | 2016-08-25 | 2016-08-25 | Preparation method of compound controlled-release chemical fertilizer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610720748.8A CN106348855A (en) | 2016-08-25 | 2016-08-25 | Preparation method of compound controlled-release chemical fertilizer |
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| CN201610720748.8A Pending CN106348855A (en) | 2016-08-25 | 2016-08-25 | Preparation method of compound controlled-release chemical fertilizer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107188677A (en) * | 2017-06-05 | 2017-09-22 | 合肥永泰新型建材有限公司 | A kind of composite environment-friendly type chemical fertilizer and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103539526A (en) * | 2013-09-29 | 2014-01-29 | 济南大学 | Slow-release chemical fertilizer with composite layer and preparation method thereof |
| CN105332158A (en) * | 2015-10-30 | 2016-02-17 | 浙江真爱毯业科技有限公司 | Production method for antistatic Raschel blanket |
-
2016
- 2016-08-25 CN CN201610720748.8A patent/CN106348855A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103539526A (en) * | 2013-09-29 | 2014-01-29 | 济南大学 | Slow-release chemical fertilizer with composite layer and preparation method thereof |
| CN105332158A (en) * | 2015-10-30 | 2016-02-17 | 浙江真爱毯业科技有限公司 | Production method for antistatic Raschel blanket |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107188677A (en) * | 2017-06-05 | 2017-09-22 | 合肥永泰新型建材有限公司 | A kind of composite environment-friendly type chemical fertilizer and preparation method thereof |
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