CN110357720A - A kind of sulphur modification oil base film-coated and slow release fertilizer - Google Patents
A kind of sulphur modification oil base film-coated and slow release fertilizer Download PDFInfo
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- CN110357720A CN110357720A CN201910725265.0A CN201910725265A CN110357720A CN 110357720 A CN110357720 A CN 110357720A CN 201910725265 A CN201910725265 A CN 201910725265A CN 110357720 A CN110357720 A CN 110357720A
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- fertilizer
- coated
- sulphur
- slow release
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Classifications
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C9/00—Fertilisers containing urea or urea compounds
-
- 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
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
-
- 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
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/90—Mixtures of one or more fertilisers with additives not having a specially fertilising activity for affecting the nitrification of ammonium compounds or urea in the soil
-
- 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
- C05G5/36—Layered or coated, e.g. dust-preventing coatings layered or coated with sulfur
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
- Y02P60/21—Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Pest Control & Pesticides (AREA)
- Soil Sciences (AREA)
- Fertilizers (AREA)
Abstract
The present invention discloses a kind of sulphur modification oil base film-coated and slow release fertilizer, which is characterized in that including fertilizer kernel and coated fertilizer, the fertilizer kernel is urea granules or other urea groups compound fertilizers or nitro-compound fertilizer particle；Coated fertilizer is sulphur modification oil based material, preparation is melted the following steps are included: first heating sulphur, and castor oil is slowly added to carry out vulcanization reaction, will obtain heating after product is mixed with polyisocyanates curing agent, coating is carried out to fertiliser granulates with gained coating liquid, slow-release fertilizer is made after solidification；Ratio used in coating raw material is 100 parts of castor oil, 5-15 parts of sulphur, 15-50 parts of polyisocyanates curing agent.Slow release fertilizer of the invention is not only able to achieve the effect of control urea release, can also be achieved the effect that s element is slowly supplemented for soil also as membrane material degradation.
Description
Technical field
The invention belongs to agricultural technical field of slow release fertilizer, specially a kind of slow release fertilizer with dual-sustained-release effect and its
Preparation method.
Background technique
In agricultural production, major way of the use of chemical fertilizer as increasing crop yield, but current common fertilizer
The problems such as being faced with great number cost caused by nutrient loss is fast, agricultural pollution is high, fertilizer efficiency is low and multiple release, film-coated and slow release fertilizer
Material comes into being.Film-coated and slow release fertilizer achievees the purpose that nutrient is isolated with external environment by coating layer of material in fertilizer surface,
It can be discharged into environment nutrient slowly, this kind of fertilizer effectively increases the utilization efficiency of fertilizer, but still remains production
At high cost, the problems such as membrane material is difficult to degrade, the growth cycle of slow release effect and plant mismatches, these problems cause slow-release fertilizer
The problems such as material is difficult to be widely applied, and fertilizer efficiency can not further increase.
Sulphur is nutrient necessary to a plant growth, if demand of the crucifer to element sulphur is larger, is lacked
The problems such as sulphur will lead to plant and generate chlorosis, cause postponement of blossoming and bearing fruit, and fruit is reduced, in addition, a lack of sulfur will lead to plant
The amino acid contents such as interior methionine, cysteine reduce, so that the synthesis of protein is influenced, as rice a lack of sulfur will lead to Empty grain rate
Rise, soybean a lack of sulfur will lead to nitrogenase activity reduction, and a lack of sulfur can seriously affect the normal growth cycle of plant.But common sulphur
Directly apply the low problem of generally existing plant absorption rate, it is therefore desirable to a kind of to provide the slow of element sulphur for a long time for plant
Release sulfur fertilizer.
The slow release fertilizer commercially used at present, the poor problem of generally existing controlled-release effect, the rate of release of nutrient, period
It is difficult to control, also results in promoting to as problem for current slow release fertilizer.
Coated fertilizer currently used for coated fertilizer is broadly divided into inorganic material and high-molecular organic material, inorganic material master
It to be sulphur, diatomite, ardealite etc., it includes synthesis high molecular material that high-molecular organic material is classified by synthetic method, hemizygous
At high molecular material and natural macromolecular material, for natural macromolecular material vulnerable to microbiological effect, controlled-release effect is poor, synthesis
The process is more complicated for high molecular material, higher cost and easily causes secondary pollution；And utilize the biological poly ammonia of castor oil preparation
Ester has good mechanical property, has certain biodegradable, does not easily cause agricultural pollution, and be using castor oil
Primary raw material reduces costs.
Summary of the invention
It is an object of the present invention to provide a kind of slow release fertilizer and preparation method thereof with dual-sustained-release effect passes through control sulphur
The ratio of sulphur and polyisocyanates curing agent in membrane material preparation process controls nutrients release effect, in addition, fertilizer is slow
It is preferable to release effect, membrane material easily biological-degradable is reduced because membrane material is difficult to degrade the environmental hazard of generation, and membrane material ingredient
Required nutrient can be provided in degradation process for plant growth.
To achieve the above object, technical solution provided by the invention is as follows:
A kind of sulphur modification oil base film-coated and slow release fertilizer, it is characterised in that: including fertilizer kernel and coated fertilizer, coated fertilizer is sulphur
Modified oil based material, preparation include: to take 5-15 parts of sulphur in reaction vessel, and lower 170 DEG C of nitrogen environment to be heated to sulphur complete
100 parts of castor oil is slowly added dropwise to reaction vessel for running down, becomes and side stirring is added dropwise, and reacting after reaction progress 6-8h terminates,
It closes power supply to reaction unit and is completely cooled down to room temperature, take above-mentioned product, 15-50 parts of polyisocyanates curing agent, 40- is added
50 DEG C of heating stirring 10min obtain coated fertilizer；
The preparation of the film-coated and slow release fertilizer: taking fertilizer inner core particles, is placed in coating machine, and 55 DEG C of preheating 20min are added above-mentioned made
Standby coated fertilizer, is rotated by coating machine, is wrapped in coated fertilizer on granular compound fertilizer securely, and is repeated the above process
3 times, membrane material dosage is calculated, prepares the film-coated and slow release fertilizer that coating amount is 3%-10%, obtaining diameter after screening is 3-4mm's
Film-coated and slow release fertilizer；The coating amount refers to that coated fertilizer accounts for the percentage of fertilizer total weight.
The fertilizer kernel is urea granules or other urea groups compound fertilizers or nitro-compound fertilizer particle.
The better suited mass ratio of coated fertilizer are as follows: 100 parts of castor oil；7-13 parts of sulphur；Polyisocyanates are solid
30-40 parts of agent.
The polyisocyanates curing agent is methyl diphenylene diisocyanate (MDI), toluene di-isocyanate(TDI)
(TDI), isophorone diisocyanate (IPDI), dicyclohexyl methyl hydride diisocyanate (HMDI), L-lysine diisocyanate
It is one or more of in ester (LDI).
After the above technical solution is adopted, the invention has the following advantages that
1, prepared slow release fertilizer can provide nutrient for a long time for plant growth, and applied once for a long time can be reduced effectively
Application times, to reduce agricultural cost.
2, nutrient discharges stage by stage, and burn seedlings risk, it is a large amount of to also reduce fertilizer caused by both having reduced because of concentration of fertilizer height
The nutrient loss generated is discharged, agricultural pollution is reduced.
3, a part of sulphur as sustained release membrane material, as membrane material is slowly degraded in the soil, element sulphur is gradually released
It puts, sulphur nutrient can be provided for a long time for plant growth.
4, by ratio used in control sulphur and polyisocyanates curing agent, it can control the crosslinking of coated fertilizer
It is raw can to prepare matching various plants to control nutrient release rate and the nutrients release period of prepared slow release fertilizer for degree
Macrocyclic slow release fertilizer.
5, used as primary raw material castor oil be a kind of non-edible oil, can using castor oil as primary raw material
A kind of new thinking is provided with the utilization for castor oil.
6, used primary raw material castor oil, sulphur, polyisocyanates curing agent are from a wealth of sources, and cost is relatively low,
Preparation process and technique are also relatively simple compared with the slow release fertilizer produced, and whole process operability is good, high production efficiency,
There is apparent Social benefit and economic benefit.
7, prepared coated fertilizer is biodegradable, not will cause because polymer be difficult to the to degrade secondary pollution of generation is asked
Topic.
Specific embodiment
Below with reference to specific implementation case column, the present invention will be described, so that the technical staff in this field preferably manages
The solution present invention is simultaneously implemented, but is only limitted to retouch invention in more detail using example herein for description of the invention
It states, is not intended to limit the present invention.
For the deficiency of film-coated and slow release fertilizer at this stage, the present invention provide it is a kind of low in cost, with castor oil, sulphur, polyisocyanate
Cyanate curing agent is the slow-release fertilizer with dual-sustained-release effect of primary raw material.
Embodiment 1:
1) it prepares coated fertilizer: taking 5g sulfur reaction container, the lower 170 DEG C of heating fusing of nitrogen environment is slowly added to 100g castor-oil plant
Oil, reaction carry out 6h, and closing reaction is heated to entire reaction unit and is cooled to room temperature.Above-mentioned sulfurized castor oil is taken, diphenyl is added
Coated fertilizer is made in methane diisocyanate resin 50g, 55 DEG C of heating stirring 10min.
2) coating is carried out using above-mentioned coated fertilizer: taking 2.2kg urea granules in coating machine, 20 turns/min, 55 DEG C of preheatings
Above-mentioned prepared coated fertilizer is poured slowly into coating machine by 20min several times, and each coating to membrane material is coated uniformly on urine
Crude granule surface；The coated slow release fertilizer that obtained coating amount is about 7%.
Embodiment 2:
1) it prepares coated fertilizer: taking 10g sulphur in reaction vessel, the lower 170 DEG C of heating fusing of nitrogen environment is slowly added to 100g castor
Sesame oil, reaction carry out 6h, close reaction and are cooled to room temperature to entire reaction unit, take above-mentioned sulfurized castor oil, add diphenylmethyl
Coated fertilizer is made in alkane diisocyanate 35g, 55 DEG C of heating 10min.
2) coating is carried out using above-mentioned material: taking 1.45kg urea in coating machine, 20 turns/min, 55 DEG C of preheating 20min will
Above-mentioned prepared coated fertilizer is poured slowly into coating machine several times, and each coating to membrane material is coated uniformly on urea granules table
Face, the coated slow release fertilizer that obtained coating amount is about 10%.
Embodiment 3:
1) it prepares coated fertilizer: taking 15g sulphur in reaction vessel, the lower 170 DEG C of heating fusing of nitrogen environment is slowly added to 100g castor
Sesame oil, reaction carry out 6h, close reaction and are cooled to room temperature to entire reaction unit, take above-mentioned sulfurized castor oil, add diphenylmethyl
Coated fertilizer is made in alkane diisocyanate 15g, 55 DEG C of heating 10min.
2) coating is carried out using above-mentioned coated fertilizer: taking 4.3kg urea in coating machine, 20 turns/min, 55 DEG C of preheatings
Above-mentioned prepared coated fertilizer is poured slowly into coating machine by 20min several times, and each coating to membrane material is coated uniformly on urine
Crude granule surface, the coated slow release fertilizer that obtained coating amount is about 3%.
Embodiment 4:
1) it prepares coated fertilizer: taking 10g sulphur in reaction vessel, the lower 170 DEG C of heating fusing of nitrogen environment is slowly added to 100g castor
Sesame oil, reaction carry out 6h, close reaction and are cooled to room temperature to entire reaction unit, take above-mentioned sulfurized castor oil, add toluene two different
Coated fertilizer is made in cyanate 35g, 55 DEG C of heating 10min.
2) coating is carried out using above-mentioned coated fertilizer: taking 2.9kg urea in coating machine, 20 turns/min, 55 DEG C of preheatings
Above-mentioned coated fertilizer is poured slowly into coating machine by 20min several times, and each coating to membrane material is coated uniformly on urea granules table
Face, the coated slow release fertilizer that obtained coating amount is about 5%.
Embodiment 5:
1) it prepares coated fertilizer: taking 10g sulphur in reaction vessel, the lower 170 DEG C of heating fusing of nitrogen environment is slowly added to 100g castor
Sesame oil, reaction carry out about 6h, close reaction and are cooled to room temperature to entire reaction unit, take above-mentioned sulfurized castor oil, add different Fo Er
Coated fertilizer is made in ketone diisocyanate 30g, 55 DEG C of heating 10min.
2) coating is carried out using above-mentioned coated fertilizer: taking 2.0kg urea in coating machine, 20 turns/min, 55 DEG C of preheatings
Above-mentioned coated fertilizer is poured slowly into coating machine by 20min several times, and each coating to membrane material is coated uniformly on urea granules table
Face, the coated slow release fertilizer that obtained coating amount is about 7%.
Embodiment 6:
1) it prepares coated fertilizer: taking 10g sulphur in reaction vessel, the lower 170 DEG C of heating fusing of nitrogen environment is slowly added to 100g castor
Sesame oil, reaction carry out about 6h, close reaction and are cooled to room temperature to entire reaction unit, take above-mentioned sulfurized castor oil, add two hexamethylenes
Coated fertilizer is made in dicyclohexylmethane diisocyanate 30g, 55 DEG C of heating 10min.
2) coating is carried out using above-mentioned coated fertilizer: taking 2.0kg urea in coating machine, 20 turns/min, 55 DEG C of preheatings
Above-mentioned coated fertilizer is poured slowly into coating machine by 20min several times, and each coating to membrane material is coated uniformly on urea granules table
Face, the coated slow release fertilizer that obtained coating amount is about 7%.
Embodiment 7:
1) it prepares coated fertilizer: going 10g sulphur in reaction vessel, the lower 170 DEG C of heating fusing of nitrogen environment is slowly added to 100g castor
Sesame oil, reaction carry out about 6h, close reaction and are cooled to room temperature to entire cooling device, take above-mentioned sulfurized castor oil, L- is added to rely ammonia
Coated fertilizer is made in sour diisocyanate 20g, 55 DEG C of heating 10min.
2) coating is carried out using above-mentioned coated fertilizer: taking 2.0kg urea in coating machine, 20 turns/min, 55 DEG C of preheatings
Above-mentioned coated fertilizer is poured slowly into coating machine by 20min several times, and each coating to membrane material is coated uniformly on urea granules table
Face, the coated slow release fertilizer that obtained coating amount is about 6%.
Although having been presented for some embodiments of the present invention herein, it will be appreciated by those of skill in the art that
Without departing from the spirit of the invention, the embodiments herein can be changed.Above-described embodiment is only exemplary, no
It should be using the embodiments herein as the restriction of interest field of the present invention.
Claims (4)
1. a kind of sulphur modification oil base film-coated and slow release fertilizer, it is characterised in that: including fertilizer kernel and coated fertilizer, coated fertilizer is
Sulphur modification oil based material, preparation includes: to take 5-15 parts of sulphur in reaction vessel, and lower 170 DEG C of nitrogen environment are heated to sulphur
It is completely melt, 100 parts of castor oil is slowly added dropwise to reaction vessel, becoming and side stirring being added dropwise, reaction reacts knot after carrying out 6-8h
Beam closes power supply to reaction unit and is completely cooled down to room temperature, take above-mentioned product, 15-50 parts of polyisocyanates curing agent are added,
40-50 DEG C of heating stirring 10min obtains coated fertilizer；
The preparation of the film-coated and slow release fertilizer: taking fertilizer inner core particles, is placed in coating machine, and 55 DEG C of preheating 20min are added above-mentioned made
Standby coated fertilizer, is rotated by coating machine, is wrapped in coated fertilizer on granular compound fertilizer securely, and is repeated the above process
3 times, membrane material dosage is calculated, prepares the film-coated and slow release fertilizer that coating amount is 3%-10%, obtaining diameter after screening is 3-4mm's
Film-coated and slow release fertilizer；The coating amount refers to that coated fertilizer accounts for the percentage of fertilizer total weight.
2. a kind of sulphur modification oil base film-coated and slow release fertilizer according to claim 1, it is characterised in that: the fertilizer kernel is urine
Crude granule or other urea groups compound fertilizers or nitro-compound fertilizer particle.
3. a kind of sulphur modification oil base film-coated and slow release fertilizer according to claim 1, it is characterised in that: the coated fertilizer is relatively suitable
The mass ratio of conjunction are as follows: 100 parts of castor oil；7-13 parts of sulphur；30-40 parts of polyisocyanates curing agent.
4. a kind of sulphur modification oil base film-coated and slow release fertilizer according to claim 1, it is characterised in that: the polyisocyanates
Class curing agent is methyl diphenylene diisocyanate MDI, toluene di-isocyanate(TDI) TDI, isophorone diisocyanate IPDI, two
It is one or more of in diphenylmethane diisocyanate HMDI, L-lysine diisocyanate LDI.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910725265.0A CN110357720A (en) | 2019-08-07 | 2019-08-07 | A kind of sulphur modification oil base film-coated and slow release fertilizer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910725265.0A CN110357720A (en) | 2019-08-07 | 2019-08-07 | A kind of sulphur modification oil base film-coated and slow release fertilizer |
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| CN201910725265.0A Pending CN110357720A (en) | 2019-08-07 | 2019-08-07 | A kind of sulphur modification oil base film-coated and slow release fertilizer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113582771A (en) * | 2021-08-24 | 2021-11-02 | 温州医科大学 | Preparation method of slow-release fertilizer based on high polymer |
| CN114956892A (en) * | 2022-05-23 | 2022-08-30 | 宁夏巨泰农业科技发展有限公司 | Potassium chelate compound fertilizer based on polypeptide and preparation method thereof |
| CN115611687A (en) * | 2022-09-20 | 2023-01-17 | 安徽司尔特化肥科技有限公司 | Special compound fertilizer for oil crop cultivation |
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| US20120111077A1 (en) * | 2010-11-10 | 2012-05-10 | Agrium Advanced Technologies | Cross-linked polyols for controlled release fertilizers |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113582771A (en) * | 2021-08-24 | 2021-11-02 | 温州医科大学 | Preparation method of slow-release fertilizer based on high polymer |
| CN113582771B (en) * | 2021-08-24 | 2023-11-10 | 温州医科大学 | Preparation method of polymer-based slow-release fertilizer |
| CN114956892A (en) * | 2022-05-23 | 2022-08-30 | 宁夏巨泰农业科技发展有限公司 | Potassium chelate compound fertilizer based on polypeptide and preparation method thereof |
| CN114956892B (en) * | 2022-05-23 | 2023-09-12 | 宁夏巨泰农业科技发展有限公司 | Polypeptide chelate potassium-based compound fertilizer and preparation method thereof |
| CN115611687A (en) * | 2022-09-20 | 2023-01-17 | 安徽司尔特化肥科技有限公司 | Special compound fertilizer for oil crop cultivation |
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Application publication date: 20191022 |