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Technique for preparing mancozeb

Mancozeb and its preparation technology are applied in botany equipment and methods, animal repellents, biocides, etc., and can solve the problems of inability to reach a fully complexed state and low complexation degree of mancozeb, Achieve the effects of significant energy saving and consumption reduction, stable product quality and appropriate release speed

Inactive Publication Date: 2005-11-16
许惠朝
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mancozeb produced by the above two methods has a low complexation degree, and the mancozeb qualitative test by CIPAC MT-130 cannot reach the full complexation state

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] a. Take 50kg of maneb wet material after washing and dehydration (calculated as dry material), then add 1.5kg of zinc chloride in terms of zinc, 1.0kg of lignosulfonate, 4kg of urotropine and 43.5kg of water , put into the beater together for beating.

[0016] b. At room temperature, put the slurry obtained in the previous step into a commercially available K80 grinder for grinding, the flow rate is controlled at 5L / min, and complexation reaction occurs during the grinding process. The average particle size of the material at the end of the grinding and reaction was measured by LMS330 laser particle size distribution analyzer to be 5 μm.

[0017] After the aforementioned materials are sent to a spray dryer for drying, the fully complexed mancozeb product can be obtained. The obtained product was qualitatively detected by CIPAC MT-130 detection method, and the result showed that it reached a fully complexed state.

Embodiment 2

[0019] a. Take 45kg of maneb wet material after washing and dehydration (calculated as dry material), then add 1.2kg of zinc sulfate in terms of zinc, 1.0kg of lignosulfonate, 9kg of cinnamaldehyde and 43.8kg of water, and put them together Go to the beater for beating.

[0020] b. At room temperature, put the slurry obtained in the previous step into a commercially available K80 grinder for grinding, the flow rate is controlled at 10L / min, and complexation reaction occurs during the grinding process. The average particle size of the material at the end of grinding and reaction was measured by LMS330 laser particle size distribution analyzer to be 10 μm.

[0021] After the aforementioned materials are sent to a spray dryer for drying, the fully complexed mancozeb product can be obtained. The obtained product was qualitatively detected by CIPAC MT-130 detection method, and the result showed that it reached a fully complexed state.

Embodiment 3

[0023] a. First take 40kg of wet manganese material after washing and dehydration (calculated as dry material), then add 1kg of zinc chloride in terms of zinc, 1.5kg of lignosulfonate, 0.5kg of diffusing agent N, and 1kg of chloral hydrate With water 56kg, drop into the beating machine jointly and carry out beating.

[0024] b. At room temperature, put the slurry obtained in the previous step into a commercially available K80 grinder for grinding, the flow rate is controlled at 16L / min, and complexation reaction occurs during the grinding process. The average particle size of the material at the end of the grinding and reaction was measured by LMS330 laser particle size distribution analyzer to be 15 μm.

[0025] After the aforementioned materials are sent to a spray dryer for drying, the fully complexed mancozeb product can be obtained. The obtained product was qualitatively detected by CIPAC MT-130 detection method, and the result showed that it reached a fully complexed st...

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PUM

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Abstract

The present invention relates to a technique for preparing mancozeb, concretely relates to a technique for preparing mancozeb. The technique for preparing mancozeb according to the invention complexes washed, dehydrated maneb with zinc salt, which comprises steps of: (a) refining maneb, zinc salt and reaction adjuvant; (b) abrading slurry obtained in last step in the abrading machine, and generating complex reaction of the material during the abrading process to obtain full complexing form mancozeb. During the abrading process, the maneb generates complex reaction with zinc ion, the ratio of generated complexing form mancozeb in the complex reaction is effectively improved relatively along with the granularity of material is reduced, until full complexing form mancozeb is obtained. The invention integrates the abrading process and the complex reaction process, which shortens the technique flow and production efficiency is high.

Description

technical field [0001] The invention relates to a preparation process of pesticides, in particular to a preparation process of mancozeb. Background technique [0002] Mancozeb is an excellent organic agricultural fungicide, which has the characteristics of high efficiency, low toxicity, broad spectrum, and slow resistance development, and is very popular among farmers. The full name of mancozeb is "ethylene bisdithiocarbamate manganese zinc complex (ethylene-bis[dithiocarbamate] manganese zinc salt)", which is the combination of zinc ions and mancozeb particles A "surface complex" formed on the surface is the result of the local chemical reaction between maneb and zinc ions on the particle surface. Mancozeb in a non-fully complexed state contains a large amount of uncomplexed maneb, so it will quickly release excessive manganese ions during the sterilization process, thereby causing phytotoxicity to crops. [0003] The traditional mancozeb complexation process mainly inclu...

Claims

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Application Information

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IPC IPC(8): A01N47/24
Inventor 许惠朝
Owner 许惠朝
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