CN111149797A - Preparation method of pesticide aqueous solution - Google Patents
Preparation method of pesticide aqueous solution Download PDFInfo
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- CN111149797A CN111149797A CN202010012483.2A CN202010012483A CN111149797A CN 111149797 A CN111149797 A CN 111149797A CN 202010012483 A CN202010012483 A CN 202010012483A CN 111149797 A CN111149797 A CN 111149797A
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/02—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests containing liquids as carriers, diluents or solvents
- A01N25/04—Dispersions, emulsions, suspoemulsions, suspension concentrates or gels
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/08—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests containing solids as carriers or diluents
- A01N25/10—Macromolecular compounds
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N53/00—Biocides, pest repellants or attractants, or plant growth regulators containing cyclopropane carboxylic acids or derivatives thereof
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N57/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic phosphorus compounds
- A01N57/10—Biocides, pest repellants or attractants, or plant growth regulators containing organic phosphorus compounds having phosphorus-to-oxygen bonds or phosphorus-to-sulfur bonds
- A01N57/16—Biocides, pest repellants or attractants, or plant growth regulators containing organic phosphorus compounds having phosphorus-to-oxygen bonds or phosphorus-to-sulfur bonds containing heterocyclic radicals
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F289/00—Macromolecular compounds obtained by polymerising monomers on to macromolecular compounds not provided for in groups C08F251/00 - C08F287/00
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- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Wood Science & Technology (AREA)
- Environmental Sciences (AREA)
- Engineering & Computer Science (AREA)
- Dentistry (AREA)
- Pest Control & Pesticides (AREA)
- Agronomy & Crop Science (AREA)
- Zoology (AREA)
- Plant Pathology (AREA)
- Chemical & Material Sciences (AREA)
- Toxicology (AREA)
- Dispersion Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
The invention discloses a preparation method of a pesticide aqueous solution, which is suitable for water-soluble pesticides and water-insoluble pesticides, and the pesticide aqueous solution prepared by the method also has the effect of slowly releasing pesticides.
Description
The technical field is as follows:
the invention belongs to the field of pesticide preparations, and particularly relates to a method for preparing a pesticide aqueous solution.
Background art:
the preparation method of the pesticide difficult to dissolve in water is generally that the pesticide is dissolved by organic solvent and then processed into the dosage forms of missible oil and the like. The use of organic solvents to dissolve pesticides is not only expensive, but also causes environmental pollution and harms the health of related operators. The sparingly water-soluble pesticide can also be processed into dosage forms such as aqueous solutions or suspending agents by means of surfactant solubilization, adhesive agents and the like, such as the methods disclosed in the Chinese patent application No. CN201410810751.X, the Chinese patent application No. CN201710956799.5 and the Chinese patent application No. CN 201710866132.6. However, the aqueous formulations of sparingly water-soluble pesticides prepared by these methods are thermodynamically unstable systems and their shelf lives are unsatisfactory.
The invention content is as follows:
the invention aims to provide a method for preparing a pesticide aqueous solution, which is not only suitable for water-soluble pesticides, but also suitable for pesticides which are insoluble in water and soluble in methanol, ethanol, dimethyl sulfoxide or a mixture of the methanol, the ethanol, the dimethyl sulfoxide and the dimethyl sulfoxide.
The above purpose of the invention is realized by adopting the following technical scheme:
the preparation method of the pesticide difficult to dissolve in water generally comprises the steps of firstly dissolving the pesticide by using an organic solvent, and then processing the pesticide into dosage forms such as missible oil and the like; or the raw materials are processed into water or suspending agents by means of solubilization of surfactants, adhesives and the like, and the defects that the environment is polluted and the human health is harmed by using organic solvents are overcome; or the obtained aqueous dosage form is a thermodynamically unstable system, and the shelf life of the aqueous dosage form is difficult to satisfy. Most of the water-insoluble pesticides are easily soluble in organic solvents such as methanol, ethanol and dimethyl sulfoxide, so that the water-insoluble pesticides can be dissolved in the organic solvents such as methanol, ethanol and dimethyl sulfoxide, absorbed by nanoparticles which can absorb water and the organic solvents, and then frozen to remove the organic solvents to form nanoparticles loaded with the water-insoluble pesticides; and dispersing in water to obtain aqueous solution. Because the nanoparticles loaded with the water-insoluble pesticide have hydrophilicity, the obtained aqueous solution has thermodynamic stability and good shelf life; and the water aqua prepared by the method also has the pesticide slow-release effect because the nanoparticles loaded with the water-insoluble pesticide release the water-insoluble pesticide through natural degradation. The method for producing an aqueous pesticide solution according to the present invention is suitable not only for pesticides which are hardly soluble in water but also for pesticides which are soluble in organic solvents such as methanol, ethanol, and dimethyl sulfoxide, but also for water-soluble pesticides.
In order to manufacture nanoparticles which can absorb water and organic solvents such as methanol, ethanol, dimethyl sulfoxide and the like, poultry feathers such as chicken feather, duck feather and goose feather are stirred and hydrolyzed in sodium hydroxide solution with the mass percentage concentration of 0.01-10% and the temperature of 30-50 ℃ for 10-24 hours, then formaldehyde and sodium bisulfite with the mass fraction of 10-28% are sequentially added for constant temperature reaction for 10-24 hours, then one or a mixture of more of acetylcholine chloride, glucosamine hydrochloride and triethylamine hydrochloride with the mass fraction of 50-90% of the poultry feathers is added, evaporation and dehydration are carried out after full stirring, a mixture of acetone and ethanol with any proportion and the total mass of 1000 times of the solid mixture is added into the obtained solid mixture, and after full stirring, filtration and removal of filter residues, The filtrate was evaporated. Then 8-30 parts (mass fraction) of the residue after evaporation of the above filtrate; 0-40 parts (mass fraction) of one or a mixture of any more of acrylic acid, N-dimethylaminoethyl methacrylate, 2-hydroxyethyl methacrylate, 2-acrylamido-2-methylpropanesulfonic acid and acrylamide; 0.01-6 parts (mass fraction) of one or a mixture of any more of glutaraldehyde, N-methylene bisacrylamide and polyethylene glycol dimethacrylate; 0.01-10 parts of one or a mixture of any more of potassium persulfate, sodium persulfate and ammonium persulfate in any proportion; 16-75 parts of water, and fully mixing the components to obtain a reaction solution; adding 6-28 parts by mass of one or a mixture of any of sodium dodecyl sulfate, span 80 and sodium dodecyl benzene sulfonate into 1000 parts by mass of toluene or xylene or a mixture of any proportion of toluene or xylene, and adding 0-20 parts by mass of tetramethylethylenediamine. Shearing and stirring the solution at a high speed for 5-60 minutes by using a shearing emulsifying machine at room temperature to 100 ℃, and dropwise adding 1-200 parts by mass of the reaction solution; after the dropwise addition of the reaction liquid is finished, the temperature is raised to 105 ℃, the high-speed shearing stirring reaction is carried out for 10 to 300 minutes, then the reaction system is transferred to a rotary evaporator, and the heating and the vacuum pumping are carried out at 110-150 ℃ to evaporate and recover the toluene or the xylene or the mixture of the toluene or the xylene and the xylene in any proportion, so as to obtain the polymer particles with the particle size of 1 to 10,000 nanometers. The cross-linked structure of the polymer nano-particle is glutaraldehyde, N-methylene bisacrylamide and polyethylene glycol dimethacrylate which can be hydrolyzed under natural conditions, the main chain of a macromolecule contains protein which is naturally degraded by scientific research, and an ion pair structure formed by sulfonate anions and ammonium cations is introduced into the molecular chain of the protein, so that the polymer nano-particle not only can absorb water, but also can absorb organic solvents such as methanol, ethanol, dimethyl sulfoxide and the like, and can be naturally degraded.
According to the technical scheme, the technical core of the invention comprises the following two aspects: the first aspect is that after water-soluble pesticide or pesticide difficult to dissolve is dissolved by water or organic solvent, polymer nanoparticles which can absorb water and organic solvent such as methanol, ethanol, dimethyl sulfoxide and the like can absorb the water, then the solvent is removed by vacuum freezing, and then the liquid absorption polymer particles loaded with pesticide are dispersed in water to prepare pesticide aqua with thermodynamic stability; the second aspect is to adopt poultry feather and water-soluble vinyl functional monomer to manufacture polymer nanoparticles which can absorb water and organic solvents such as methanol, ethanol, dimethyl sulfoxide and the like.
Example 1
Adding 10 g of dried chicken feather powder into 30 g of sodium hydroxide solution with the concentration of 8% and the temperature of 39 ℃, stirring and hydrolyzing for 16 hours, sequentially adding 1.8 g of formaldehyde and 2.2 g of sodium bisulfite, and reacting for 20 hours at constant temperature; adding 6.2 g of acetylcholine chloride, fully stirring, evaporating and dehydrating, adding 300 g of ethanol into the obtained solid mixture, stirring for 10min, then adding 1300 g of acetone, stirring for 30min, filtering, removing filter residue, and evaporating the filtrate; adding 50 g of water into the evaporated residue, and stirring to dissolve; respectively adding 38 g of acrylamide, 0.09 g of N, N-methylene bisacrylamide and 0.5 g of ammonium persulfate, and stirring for dissolving to obtain a reaction solution; to 1000 g of toluene were added 10 g of span 80 and 3.1 g of tetramethylethylenediamine. Shearing and stirring the solution at 47 ℃ for 30min at a high speed by using a shearing emulsifying machine, and dropwise adding the reaction solution; after the dropwise addition of the reaction solution is finished, the temperature is raised to 96 ℃, the reaction solution is subjected to high-speed shearing stirring reaction for 4.5 hours, then the reaction system is transferred to a rotary evaporator, the heating is carried out at 110 ℃, the vacuum pumping is carried out to evaporate and recover toluene, and the white to light yellow powdery solid subject is obtained, the particle size is tested to be 307-shaped and 6,877 nm, the absorbable water is 67g/g, the absorbed methanol is 12g/g, the absorbed ethanol is 8g/g, and the DMSO is 53 g/g.
Example 2
Adding 12g of dried duck feather powder into 28 g of sodium hydroxide solution with the concentration of 10% and the temperature of 42 ℃, stirring and hydrolyzing for 13 hours, sequentially adding 2.1 g of formaldehyde and 2.0 g of sodium bisulfite, and reacting for 17 hours at constant temperature; adding 4.9 g of triethylamine hydrochloride, fully stirring, evaporating and dehydrating, adding 86 g of ethanol into the obtained solid mixture, stirring for 25min, then adding 1145 g of acetone, stirring for 30min, filtering, removing filter residues, and evaporating the filtrate; adding 78 g of water into the evaporated residue, and stirring to dissolve; respectively adding 25 g of 2-hydroxyethyl methacrylate, 0.05 g of N, N-methylene-bisacrylamide and 0.3 g of ammonium persulfate, and stirring for dissolving to obtain a reaction solution; to 1000 g of toluene were added 12g of sodium lauryl sulfate and 3.6 g of tetramethylethylenediamine. Shearing and stirring the solution at a high speed by a shearing emulsifying machine at 52 ℃ for 30min, and dropwise adding the reaction solution; after the dropwise addition of the reaction solution is finished, the temperature is raised to 105 ℃, the reaction solution is subjected to high-speed shearing stirring reaction for 4 hours, then the reaction system is transferred to a rotary evaporator, heating is carried out at 110 ℃, vacuum pumping is carried out to evaporate and recover toluene, and a light yellow powdery solid subject is obtained, wherein the particle size is tested to be 687-251 nanometers, the absorbable water is 83g/g, the absorbed methanol is 48g/g, the absorbed ethanol is 23g/g, and the absorbed DMSO is 66 g/g.
Example 3
Dissolving 3.6 g of O, O-diethyl-O- (3,5, 6-trichloro-2-pyridyl) thiophosphate in 28 g of methanol under stirring, slowly adding 3g of the polymer powder prepared in example 1 under stirring, continuously stirring until the solution becomes pasty, then freeze-drying, removing the methanol, and dissolving in 300 g of water to obtain the chlorpyrifos aqua.
Example 4
Dissolving 6.3 g of cypermethrin in 13 g of ethanol, slowly adding 0.8 g of the polymer powder prepared in the example 2 while stirring, continuously stirring until the solution becomes pasty, then freeze-drying, removing ethanol, and dissolving in 100 g of water to obtain the cypermethrin aqua.
The above embodiments and examples of the present invention are only for the purpose of facilitating understanding of the present invention, and do not limit the present invention, and the objects of the present invention can be achieved within the scope of the technical solution of the present invention and the claims thereof.
Claims (4)
1. A preparation method of a pesticide aqueous solution is characterized by comprising the following steps: after the pesticide is dissolved by the solvent, the pesticide is absorbed by the liquid absorption polymer particles with the particle size of 1-10,000 nanometers, then the solvent is removed by vacuum freezing, and then the liquid absorption polymer particles carrying the pesticide are dispersed in water to prepare the pesticide preparation of the aqua formulation.
2. The method for preparing an aqueous formulation of a pesticide according to claim 1, characterized in that: the solvent is any one of methanol, ethanol, water and dimethyl sulfoxide or a mixture of any several of the above in any proportion.
3. The method for producing an aqueous agricultural chemical agent according to claim 1, characterized in that: the method for producing the liquid-absorbent polymer particles comprises the steps of:
(1) stirring poultry feather such as chicken feather, duck feather and goose feather in sodium hydroxide solution with mass percentage concentration of 0.01-10% and temperature of 30-50 deg.C, hydrolyzing for 10-24 hr, sequentially adding formaldehyde and sodium bisulfite with mass fraction of 10-28% into poultry feather, and reacting at constant temperature for 10-24 hr;
(2) adding one or a mixture of more of acetylcholine chloride, glucosamine hydrochloride and triethylamine hydrochloride in any proportion, wherein the mass fraction of the acetylcholine chloride, the glucosamine hydrochloride and the triethylamine hydrochloride is 50-90% of that of the poultry feathers, fully stirring, evaporating and dehydrating to obtain a solid mixture, adding a mixture of acetone and ethanol in any proportion, the total mass of which is 600-1000 times that of the solid mixture, fully stirring, filtering, removing filter residues and evaporating filtrate;
(3)8-30 parts (mass fraction) of residue obtained by evaporating the filtrate; 0-40 parts (mass fraction) of one or a mixture of any more of acrylic acid, N-dimethylaminoethyl methacrylate, 2-hydroxyethyl methacrylate, 2-acrylamido-2-methylpropanesulfonic acid and acrylamide; 0.01-6 parts (mass fraction) of one or a mixture of any more of glutaraldehyde, N-methylene bisacrylamide and polyethylene glycol dimethacrylate; 0.01-10 parts of one or a mixture of any more of potassium persulfate, sodium persulfate and ammonium persulfate in any proportion; 16-75 parts of water, and fully mixing the components to obtain a reaction solution;
(4) adding 6-28 parts by mass of one or a mixture of any of sodium dodecyl sulfate, span 80 and sodium dodecyl benzene sulfonate into 1000 parts by mass of toluene or xylene or a mixture of any proportion of toluene or xylene, and adding 0-20 parts by mass of tetramethylethylenediamine. Shearing and stirring the solution at a high speed for 5-60 minutes by using a shearing emulsifying machine at room temperature to 100 ℃, and dropwise adding 1-200 parts by mass of the reaction solution;
(5) after the dropwise addition of the reaction liquid is finished, the temperature is raised to 105 ℃, the reaction is carried out for 10 to 300 minutes by high-speed shearing and stirring, then the reaction system is transferred to a rotary evaporator, and the toluene or the xylene or the mixture of the toluene or the xylene in any proportion is evaporated and recovered by heating at 110-150 ℃ and vacuumizing, so as to obtain the liquid-absorbing polymer particles with the particle size of 1 to 10,000 nanometers.
4. The method for producing an aqueous agricultural chemical agent according to claim 1, characterized in that: the pesticide comprises water-soluble pesticide and pesticide which is insoluble in water but soluble in methanol, ethanol, dimethyl sulfoxide or mixture thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010012483.2A CN111149797A (en) | 2020-01-07 | 2020-01-07 | Preparation method of pesticide aqueous solution |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010012483.2A CN111149797A (en) | 2020-01-07 | 2020-01-07 | Preparation method of pesticide aqueous solution |
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| CN111149797A true CN111149797A (en) | 2020-05-15 |
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| CN202010012483.2A Pending CN111149797A (en) | 2020-01-07 | 2020-01-07 | Preparation method of pesticide aqueous solution |
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Citations (7)
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2020
- 2020-01-07 CN CN202010012483.2A patent/CN111149797A/en active Pending
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| CN105309424A (en) * | 2008-09-25 | 2016-02-10 | 维乌作物保护有限公司 | Methods to produce polymer nanoparticles and formulations of active ingredients |
| CN103039442A (en) * | 2013-01-21 | 2013-04-17 | 海南大学 | Method for preparing drug-loading nanocomposite through ball-milling modification of mineral soil and application |
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| BRYAN WATTIE: "Synthesis and Properties of Feather Keratin-Based Superabsorbent Hydrogels", 《WASTE AND BIOMASS VALORIZATION》 * |
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