CN101961006A - Wet-preparation process for mancozeb water dispersible granules - Google Patents
Wet-preparation process for mancozeb water dispersible granules Download PDFInfo
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- CN101961006A CN101961006A CN2010102439335A CN201010243933A CN101961006A CN 101961006 A CN101961006 A CN 101961006A CN 2010102439335 A CN2010102439335 A CN 2010102439335A CN 201010243933 A CN201010243933 A CN 201010243933A CN 101961006 A CN101961006 A CN 101961006A
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Abstract
The invention discloses a wet-preparation process for mancozeb water dispersible granules, which aims to solve the technical problems of heavy pollutions and difficult storage, transport and dissolution of agricultural carmazine. The adopted technical scheme is that: the preparation process is realized by a dispersion machine, a grinding machine and a spray granulation and drying tower, and specifically comprises the following steps of: adding crude mancozeb and a filler into a dispersion tank of the dispersion machine, and fully mixing the ingredients to form uniformly-dispersed slurry by using the dispersion machine; feeding the uniformly-dispersed slurry into a grinding hopper of the grinding machine by using a feeding pipeline, and performing grinding by using the grinding machine; and feeding the ground slurry to the spray granulation and drying tower, and performing spray granulation by using granulation spray orifices to form the mancozeb granules. The key of the wet-preparation process is that: the crude mancozeb and the filler are crushed by a wet method, so dust pollutions to the atmosphere are reduced and economic cost is saved.
Description
Technical field
The present invention relates to a kind of preparation technology of mancozeb granula, be applied to the wet method preparation process in agricultural mancozeb sterilization field, particularly a kind of mancozeb water dispersible granule.
Background technology
At present, agricultural Carmazine has formulations such as wetting powder, moist suspending agent and the solid dispersant of column on the domestic market.Wherein mancozeb wettable powder is traditional solid dosage forms, in process of production, adopt the former medicine of dry method comminution by gas stream mancozeb, the particle diameter of the former medicine of mancozeb is crushed to about 2 μ m, and superfine little particle dust easily penetrates protective garment infringement health in air, and particle flies away with the wind, be difficult to deposition, aggravated pollution, dust explosion has easily taken place, threatened for personnel and property air.Produce for fear of above-mentioned phenomenon, formed formulations such as moist suspending agent of mancozeb and the solid dispersant of column through improvement.The moist suspending agent of mancozeb will be processed into dispersible liquid preparation in the water at solid dosage, the only several μ m of its average grain diameter, the suspensibility height, good drug efficacy, accepted by the user soon, but in the process of promoting certain problem has appearred, the prescription of the moist suspending agent of mancozeb and technology are than mancozeb wettable powder complexity, the factor that influences end product quality is more, deposited for a long time just and layering, precipitation and caking phenomenon can occur, and packaging material be difficult for to be handled, and it is big to add Packing Unit, makes troubles for storage and transportation.For addressing the above problem, produced the solid dispersant of column through improvement, though but the solid dispersant of column has solved the problem of pollution and cost, but its dissolution velocity in water is quite slow, bring great inconvenience to the consumer, therefore, the preparation technology of mancozeb granula need pollute little, storage convenient transportation in line with when operation, purpose that the aqueous dispersion performance is good is improved again.
Summary of the invention
The present invention pollutes the technical problem that strong, moist suspending agent is difficult for the solid dispersant water dispersible of storage and transportation and cylindricality difference for solving mancozeb wettable powder, designed a kind of wet method preparation process of mancozeb water dispersible granule, by adopting waterproof pulverization and grinding technique, solved the mancozeb medicament in process of production because dust from flying causes the technical problem of environmental pollution and cost waste, it has new structure by the mancozeb particle that the mist projection granulating tower forms, meet water disintegration fast, technology is simple, has overcome the deficiencies in the prior art.
The present invention is that a kind of wet method preparation process of mancozeb water dispersible granule, above processing step comprise the dehydration of mancozeb wet feed, also comprise in the above-mentioned processing step for realizing the technical scheme that goal of the invention adopts:
A, batching: the mancozeb wet feed after will dewatering is pressed following formulation ratio with effective content conversion back:
Mancozeb 40～90%
Dispersant 1～20%
Wetting agent 1～20%
Disintegrant 1～20%
Suspension aids 0.01～10%
Defoamer 0.01～10%
All the other are filler;
B, batching is added water break into slurries;
C, grinding: slurries are delivered in the sand mill grind;
D, the slurries behind the sand milling are delivered to the mist projection granulating tower carry out mist projection granulating, form the mancozeb particle;
E, by grain fineness screening, be distributed into product.
Key of the present invention is, adopt former medicine of waterproof pulverization mancozeb and filler, the whole preparation process of mancozeb water dispersible granule all is to carry out in water, comprise that batching making beating, slip grind and mist projection granulating, in whole process of production, there is no dust and produce, guaranteed that the producer's is healthy, reduced dust pollution, also saved Financial cost simultaneously atmosphere.
The invention has the beneficial effects as follows: by adopting waterproof pulverization and grinding technique, solved the mancozeb medicament, saved Financial cost in process of production because dust from flying causes the technical problem of environmental pollution and cost waste, and whole technical process is implemented simple.It has new structure by the mancozeb particle that the mist projection granulating tower forms, and is easy to store and use, and meets water disintegration fast, and dispersive property is good.
Mancozeb agricultural chemicals waterproof pulverization mist projection granulating is as a kind of explained hereafter method of novel efficient energy-saving and emission-reducing, and its investment number will save 20% with the dry pulverization process granulation, and good social benefit and economic benefit are arranged.The waterproof pulverization mist projection granulating is all to be much better than the dry pulverization process granulation on the safety of the uniformity of production, material from dust and production, meets national development green ecological agricultural and requires, and very high development prospect and value are arranged.
Embodiment
A kind of wet method preparation process of mancozeb water dispersible granule, above processing step comprise the dehydration of mancozeb wet feed, also comprise in the above-mentioned processing step:
A, batching: the mancozeb wet feed after will dewatering is pressed following formulation ratio with effective content conversion back:
Mancozeb 40～90%
Dispersant 1～20%
Wetting agent 1～20%
Disintegrant 1～20%
Suspension aids 0.01～10%
Defoamer 0.01～10%
All the other are filler
B, batching is added water break into slurries;
C, grinding: slurries are delivered in the sand mill grind;
D, the slurries behind the sand milling are delivered to the mist projection granulating tower carry out mist projection granulating, form the mancozeb particle;
E, by grain fineness screening, be distributed into product.
Among the above-mentioned step C, the grain fineness of mancozeb should be less than 5 μ m.
In the above-mentioned steps A, dispersant is a kind of in calcium lignosulfonate, dispersing agent NNO, D-450, the sodium lignin sulfonate, or takes the mixture of above two or more material.
In the above-mentioned steps A, wetting agent is a kind of in penetrant t, EFW, sodium alkyl sulfonate, the lauryl sodium sulfate, or takes the mixture of above two or more material.
In the above-mentioned steps A, disintegrant is a kind of in ammonium sulfate, bentonite, the sodium alginate, or takes the mixture of above two or more material.
In the above-mentioned steps A, suspension aids is a kind of in aluminium-magnesium silicate, xanthans, the polysaccharide ethyl cellulose, or takes the mixture of above two or more material.
In the above-mentioned steps A, defoamer is a kind of in silicone oil butyl ester, tributyl phosphate, the methyl-silicone oil, or takes the mixture of above two or more material.
For the mancozeb that contains in the mancozeb particle is better adjusted, in the above-mentioned steps A, filler is a kind of in talcum powder, attapulgite, the potter's clay, or takes the mixture of above two or more material.When preparation contained the particle of the former medicine of micro-mancozeb, the adding proportion of filler was bigger.
Among the above-mentioned step D, the process conditions of mist projection granulating are: the process conditions of mist projection granulating are: pressure is that the interior intake of 0.1～0.5mpa, tower is at 6000～9000m
3Between/the h, intake air temperature between 150～350 ℃, the air outlet temperature is between 50～150 ℃.。
The required mancozeb wet feed of processing in the technical process of the present invention, it can be the mancozeb wet feed that common factory produces, after dehydration, make its water content 20～40%, calculate active ingredient and convert by above matching principle then and become the amount that adds prescription, add above-mentioned auxiliary agent then, form mancozeb water dispersible granule through making beating, grinding, mist projection granulating.
For keeping the degree of scatter of the former medicine of mancozeb in water, the former medicine that prevents to have become fine particle through processing is coacervating large particle again, in batching, increase dispersant, in the above-mentioned steps A, dispersant is calcium lignosulfonate, dispersing agent NNO, D-450, sodium lignin sulfonate, or takes the mixture of above two or more material.
For solving the wetting problem of particle and water surface, reduce the tension force of water at particle surface, increase autgmentability and the penetration of water at particle surface, in batching, increase wetting agent, in the above-mentioned steps A, wetting agent is a kind of in penetrant t, EFW, sodium alkyl sulfonate, the lauryl sodium sulfate, or takes the mixture of above two or more material.
For making particle in water, can split into fine particle rapidly, the contact area of increase and water increases disintegrant, in the above-mentioned steps A in batching, disintegrant is a kind of in ammonium sulfate, bentonite, the sodium alginate, or takes the mixture of above two or more material.
For increasing the suspension stability of the former medicine particle of mancozeb in water, prevent sedimentation, in batching, increase suspension aids, in the above-mentioned steps A, suspension aids is a kind of in aluminium-magnesium silicate, xanthans, the polysaccharide ethyl cellulose, or takes the mixture of above two or more material.
Because dispersant generally is surfactant, in process of lapping, can produce a large amount of bubbles, reduce grinding efficiency, so in batching, increased defoamer, in the above-mentioned steps A, defoamer is a kind of in silicone oil butyl ester, tributyl phosphate, the methyl-silicone oil, or takes the mixture of above two or more material.
For guaranteeing the chemical stability of mill base slurry, grinding temperature should be too not high, and slip solid-liquid concentration also should remain between 10%～60%, among the above-mentioned step C, in process of lapping, adjust the slurries density and keep slurry temperature constant between 25～40 ℃ by cooling water system.
The mancozeb particle that technical scheme of the present invention forms has in the water identical with pulvis dispersed, and its basic granules diameter again can be too not little, guarantees that the own wt of particle can overcome air agitation, reduces dust pollution.
After the mancozeb wet feed converted with active ingredient, provide four specific embodiments of prescription:
According to the specific embodiment of above batching, carry out subsequent handling of the present invention:
The former medicine of mancozeb, dispersant, wetting agent, disintegrant, suspension aids, defomaing agent, filler are added water be mixed with the slurry that contains 40% solid matter;
Then, grind average fineness through two 80 liter vertical grinding machines successively and reach below the 5 μ m, in the mill bucket of sand mill, add 40 liters of beades that diameter is 2～3mm, as abrasive media, and inlet amount is controlled at 2-15L/min, slurry temperature is controlled at 25～40 ℃;
In the mist projection granulating tower, carry out mist projection granulating then.Mist projection granulating operation among the present invention, can adopt 21 meters of tower heights, 5 meters of diameters, the granulation injection diameter is the mist projection granulating tower of 3.0mm, and intake air temperature is controlled at 270 ℃, the air outlet temperature is controlled at 97 ℃, makes granulation tower form from high to low thermograde from top to bottom, and air quantity is controlled at 8000 cubic metres/hour, force pump pressure is increased to 0.1Mpa.
Whole pulverizing and process of lapping are all finished under liquid condition, and the former medicine of mancozeb contacts fully with auxiliary agent in grinding, constant product quality not only, and drug effect also is higher than wetting powder 10%, and has avoided the harm to crops.
The mancozeb water dispersible granule that forms through above processing step, when the screening packing, reslurry in the bigger or less dispersion batch can that all can be back to dispersion machine of particle.
Claims (9)
1. the wet method preparation process of a mancozeb water dispersible granule, above processing step comprise the dehydration of mancozeb wet feed, it is characterized in that: also comprise in the described processing step:
A, batching: press column weight amount percentage proportioning after the mancozeb wet feed after will dewatering is converted with effective content:
Mancozeb 40～90%
Dispersant 1～20%
Wetting agent 1～20%
Disintegrant 1～20%
Suspension aids 0.01～10%
Defoamer 0.01～10%
All the other are filler;
B, batching is added water break into slurries;
C, grinding: slurries are delivered in the sand mill grind;
D, the slurries behind the sand milling are delivered to the mist projection granulating tower carry out mist projection granulating, form the mancozeb particle;
E, by grain fineness screening, be distributed into product.
2. the wet method preparation process of a kind of mancozeb water dispersible granule according to claim 1, it is characterized in that: among the described step C, the average fineness of mancozeb particle is less than 5 μ m in the slurries.
3. the wet method preparation process of a kind of mancozeb water dispersible granule according to claim 1, it is characterized in that: in the described steps A, dispersant is a kind of in calcium lignosulfonate, dispersing agent NNO, D-450, the sodium lignin sulfonate, or takes the mixture of above two or more material.
4. the wet method preparation process of a kind of mancozeb water dispersible granule according to claim 1, it is characterized in that: in the described steps A, wetting agent is a kind of in penetrant t, EFW, sodium alkyl sulfonate, the lauryl sodium sulfate, or takes the mixture of above two or more material.
5. the wet method preparation process of a kind of mancozeb water dispersible granule according to claim 1, it is characterized in that: in the described steps A, disintegrant is a kind of in ammonium sulfate, bentonite, the sodium alginate, or takes the mixture of above two or more material.
6. the wet method preparation process of a kind of mancozeb water dispersible granule according to claim 1, it is characterized in that: in the described steps A, suspension aids is a kind of in aluminium-magnesium silicate, xanthans, the polysaccharide ethyl cellulose, or takes the mixture of above two or more material.
7. the wet method preparation process of a kind of mancozeb water dispersible granule according to claim 1, it is characterized in that: in the described steps A, defoamer is a kind of in silicone oil butyl ester, tributyl phosphate, the methyl-silicone oil, or takes the mixture of above two or more material.
8. the wet method preparation process of a kind of mancozeb water dispersible granule according to claim 1 is characterized in that: in the described steps A, filler is a kind of in talcum powder, attapulgite, the potter's clay, or takes the mixture of above two or more material.
9. the wet method preparation process of a kind of mancozeb water dispersible granule according to claim 1, it is characterized in that: among the described step D, the process conditions of mist projection granulating are: pressure be in 0.1～0.5Mpa, the tower intake at 6000～9000m
3Between/the h, intake air temperature between 150～350 ℃, the air outlet temperature is between 50～150 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2010102439335A CN101961006A (en) | 2010-08-04 | 2010-08-04 | Wet-preparation process for mancozeb water dispersible granules |
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| CN2010102439335A CN101961006A (en) | 2010-08-04 | 2010-08-04 | Wet-preparation process for mancozeb water dispersible granules |
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| CN101961006A true CN101961006A (en) | 2011-02-02 |
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| CN2010102439335A Pending CN101961006A (en) | 2010-08-04 | 2010-08-04 | Wet-preparation process for mancozeb water dispersible granules |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102217626A (en) * | 2011-05-06 | 2011-10-19 | 浙江泰达作物科技有限公司 | Water dispersible granule formulated from phytocide fluroxypyr and ethoxysulfuron and preparation method of granule |
| CN102977052A (en) * | 2012-12-19 | 2013-03-20 | 河南省新乡市农业科学院 | 2-mercaptobenzothiazole manganese zinc as well as preparation method and application of 2-mercaptobenzothiazole manganese zinc |
| CN107006461A (en) * | 2017-05-19 | 2017-08-04 | 发事达(南通)化工有限公司 | A kind of preparation method of pesticide water dispersible granules |
Citations (2)
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|---|---|---|---|---|
| US5001150A (en) * | 1988-03-22 | 1991-03-19 | E. I. Du Pont De Nemours And Company | Nondusty spray dried mancozeb water-dispersible granules and the process for their production |
| CN1695449A (en) * | 2005-04-08 | 2005-11-16 | 许惠朝 | Technique for preparing mancozeb |
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2010
- 2010-08-04 CN CN2010102439335A patent/CN101961006A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5001150A (en) * | 1988-03-22 | 1991-03-19 | E. I. Du Pont De Nemours And Company | Nondusty spray dried mancozeb water-dispersible granules and the process for their production |
| CN1695449A (en) * | 2005-04-08 | 2005-11-16 | 许惠朝 | Technique for preparing mancozeb |
Non-Patent Citations (3)
| Title |
|---|
| 华乃震: "农药水分散粒剂的开发和进展", 《现代农药》 * |
| 张国生: "农药水分散粒剂与悬浮剂的配方技术及其应用", 《世界农药》 * |
| 张大侠等: "70%代森锰锌水分散粒剂的配方研究", 《农药研究与应用》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102217626A (en) * | 2011-05-06 | 2011-10-19 | 浙江泰达作物科技有限公司 | Water dispersible granule formulated from phytocide fluroxypyr and ethoxysulfuron and preparation method of granule |
| CN102977052A (en) * | 2012-12-19 | 2013-03-20 | 河南省新乡市农业科学院 | 2-mercaptobenzothiazole manganese zinc as well as preparation method and application of 2-mercaptobenzothiazole manganese zinc |
| CN102977052B (en) * | 2012-12-19 | 2014-08-13 | 河南省新乡市农业科学院 | 2-mercaptobenzothiazole manganese zinc as well as preparation method and application of 2-mercaptobenzothiazole manganese zinc |
| CN107006461A (en) * | 2017-05-19 | 2017-08-04 | 发事达(南通)化工有限公司 | A kind of preparation method of pesticide water dispersible granules |
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Application publication date: 20110202 |