Water-soluble granule formulation containing paraquat dichloride and preparation method of water-soluble granule formulation

A technology of paraquat dichloride and water-soluble granules, applied in the field of pesticides, can solve the problems of incomplete safety, unsatisfactory overall effect, restrictions, etc., to prevent accidental or intentional ingestion, safe and clean The effects of streamlining production and avoiding exposure to hazards

Inactive Publication Date: 2012-07-18
NANJING HUAZHOU PHARMA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The 200 g / L and 250 g / L paraquat aqueous solutions currently on the market have certain safety hazards in the actual use process. For example, the diluted solution can be absorbed through the skin when it comes into contact with the skin, and can be absorbed through the skin when it is sprayed and atomized. Toxic by inhalation of respiratory organs
Moreover, accidental or deliberate ingestion can be fatal, unless first aid measures are taken immediately after ingestion, but the damage and loss caused by misuse and misuse are often greater
[0003] In order to solve its safety problem, there are many attempts, including the chelation method, but the safety problem cannot be completely solved. There is also a method to passivate paraquat activity by using clay as a diluent, but in the end it loses its killing effect. Herbicide activity is limited, and foreign patent reports have mixed it with other herbicides and made it into a solid dosage form for use, but it is also limited by various factors, and the overall effect is not ideal after all.

Method used

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  • Water-soluble granule formulation containing paraquat dichloride and preparation method of water-soluble granule formulation
  • Water-soluble granule formulation containing paraquat dichloride and preparation method of water-soluble granule formulation
  • Water-soluble granule formulation containing paraquat dichloride and preparation method of water-soluble granule formulation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 75% paraquat dichloride, 5% sodium naphthalenesulfonate formaldehyde condensate, 2% ethylene oxide propylene oxide copolymer (molecular weight 1500-2000, the same below), equivalent to 0.18% of the mass of paraquat dichloride Triazolopyrimidinone, 0.03% ammonium benzide sodium, 0.05% brilliant blue (acid blue 9#), 0.1% pyridine, and the rest is supplemented to 100% with mixed salt of ammonium sulfate and sodium sulfate (mass ratio 1:1) . Then, mix the mixture with 15% water based on the weight of the mixture at room temperature to form a slurry, use the boiling granulation method: mix with hot air, heat up to ≥45°C, keep warm at 45-50°C, spray the mother liquor to granulate, Spray 1000~1200ml / 60~75 seconds each time, stop for 10 seconds, spray 8~10 times in total, compressed air pressure: 6kg / cm 2 , Vacuum exhaust control: inlet: 20 ~ 30mmH 2 O outlet: 350~400mmH 2 O, cool down to room temperature, and form the slurry into particles with a particle size of 0.8-1.2 mm...

Embodiment 2

[0031] 60% paraquat dichloride, 5% sodium octyl naphthalene sulfonate, 2% ethylene oxide propylene oxide copolymer, triazole pyrimidinone equivalent to 0.18% of paraquat dichloride mass, 0.03% saccharin benzyl Ammonium amide, 0.05% brilliant blue (acid blue 9#), 0.1% n-butanol, and the rest was supplemented to 100% with a mixed salt of ammonium sulfate and sodium sulfate (mass ratio 1:1). Then, mix the mixture with 20% water based on the weight of the mixture at room temperature to form a slurry, use the boiling granulation method: hot air mixing, heat up to ≥45°C, keep warm at 45-50°C, spray the mother liquor to granulate, Spray 1000~1200ml / 60~75 seconds each time, stop for 10 seconds, spray 8~10 times in total, compressed air pressure: 6kg / cm 2 , Vacuum exhaust control: inlet: 20 ~ 30mmH 2 O outlet: 350~400mmH 2 O, cool down to room temperature, and form the slurry into particles with a particle size of 0.8-1.2 mm. Particles with a particle size of 0.8 to 1.2 mm are forme...

Embodiment 3

[0033]60% paraquat dichloride, 5% sodium naphthalenesulfonate formaldehyde condensate, 2% ethylene oxide propylene oxide copolymer, triazole pyrimidinone equivalent to 0.18% of paraquat dichloride mass, 0.03% Ammonium benzoate sodium, 0.05% brilliant blue (acid blue 9#), 0.1% pyridine, and the rest was supplemented to 100% with mixed salt of ammonium sulfate and sodium sulfate (mass ratio 1:1). Then, mix the mixture with 20% water based on the weight of the mixture at room temperature to form a slurry, use the boiling granulation method: mix with hot air, heat up to ≥45°C, keep the temperature at 45-50°C, spray the mother liquor to granulate, Spray 1000~1200ml / 60~75 seconds each time, stop for 10 seconds, spray 8~10 times in total, compressed air pressure: 6kg / cm 2 , Vacuum exhaust control: inlet: 20 ~ 30mmH 2 O outlet: 350~400mmH 2 O, down to room temperature, forming particles with a particle size of 0.8-1.2mm. When used, it is formulated into an aqueous solution and spra...

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Abstract

The invention belongs to the field of pesticides, and discloses a water-soluble granule formulation containing paraquat dichloride and a preparation method of the water-soluble granule formulation. The water-soluble granule formulation comprises the following components: 0.1 to 95 parts by weight of paraquat dichloride, 1 to 30 parts by weight of surfactants, 0.001 to 0.1 part by weight of bitter agent, 0.05 part by weight of pigment, 0.1 part by weight of odor agent and an emetic equivalent to 0.18 wt% of the paraquat dichloride, wherein the surfactant is a sulfonic compound, a sulfuric compound, an anionic surfactant and/or a non-ionic surfactant; the components are mixed to form size, and then particles are prepared by a fluidized granulating method. The prepared water-soluble granule formulation can be used for preventing poisoning risk caused by contacting or ingesting a regular soluble concentrate or wettable powder, and the weeding effect is kept after the water-soluble granule formulation is stored for a long time.

Description

technical field [0001] The invention belongs to the field of pesticides, and relates to water-soluble granules containing paraquat dichloride and a preparation method thereof. Background technique [0002] The 200 g / L and 250 g / L paraquat aqueous solutions currently on the market have certain safety hazards in the actual use process. For example, the diluted solution can be absorbed through the skin when it comes into contact with the skin, and can be absorbed through the skin when it is sprayed and atomized. Respiratory organ inhalation causes poisoning. Moreover, accidental or deliberate ingestion can be fatal, unless first aid measures are taken immediately after ingestion, but the damage and loss caused by misuse and misuse are often greater. [0003] In order to solve its safety problem, there are many attempts, including the chelation method, but the safety problem cannot be completely solved. There is also a method to passivate paraquat activity by using clay as a di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N43/40A01N25/14A01P13/00
Inventor 郭崇友沈海峰甘华军朱有智刘德友彭永强
Owner NANJING HUAZHOU PHARMA
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