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Preparation method of fenitrothion

A fenitrothion and organic solvent technology, applied in the field of fenitrothion equipment, can solve the problems of light, heat, humidity instability, rotten egg smell, low volatility, etc., to avoid fire accidents and fast dehydration , to reduce the effect of decomposition

Inactive Publication Date: 2015-03-18
QINGDAO HAOLITE BIOLOGICAL PESTICIDE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Fenitrothion pure product is white powder, industrial product is off-white or light yellow powder, has the smell of rotten eggs, hardly soluble in water, insoluble in most organic solvents, but soluble in pyridine, not sensitive to light, heat and humidity Stable, easy to decompose carbon disulfide, when encountering alkaline substances or copper, mercury and other substances, it is easy to decompose and release carbon disulfide and reduce its effect, low volatility

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0008] The preparation method of fenitrothion, the steps are as follows:

[0009] In the first step, fenitrothion is prepared by mixing an organic solvent with a wet product of fenitrothion, distilling and dehydrating.

[0010] In the second step, the solvent is used as the carrier and dehydrated by spraying heating or heating distillation by a film evaporator, so that the dehydration process and the wet crushing, preparation and packaging processes can be operated continuously.

[0011] In the third step, the complexation of Maneb and zinc in an organic solvent and the dehydration and crystallization process are completed at the same time

[0012] The third step reduces the decomposition of the product, reduces the pollution of harmful impurities and dust, and avoids the occurrence of fire accidents during the drying process of the product. The solvent method of the invention has high dehydration speed, high production safety and efficiency, and simplifies the production pro...

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PUM

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Abstract

The invention relates to a preparation method of fenitrothion. The preparation method comprises the following steps of firstly, mixing an organic solvent and a wet product of fenitrothion, distilling and dehydrating to prepare fenitrothion; secondly, distilling and dehydrating through spray heating or membrane evaporator heating by taking the solvent as a carrier to realize the continuous operation of a dehydration process as well as wet-process smashing, blending and packaging processes; and thirdly, simultaneously finishing the operation of complexing maneb and zinc in the organic solvent and the process of dehydrating for crystal transformation. Due to the implementation of the third step, the decomposition of a product is reduced, the harmful impurity and dust pollution is reduced, and a fire accident generated in a product drying process is avoided.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a preparation method of fenitrothion. Background technique [0002] Fenitrothion pure product is white powder, industrial product is off-white or light yellow powder, has the smell of rotten eggs, hardly soluble in water, insoluble in most organic solvents, but soluble in pyridine, not sensitive to light, heat and humidity Stable, easy to decompose carbon disulfide, easy to decompose and release carbon disulfide when encountering alkaline substances or copper, mercury and other substances, and reduce the effect, low volatility. The so-called protection is to provide Zn elements for plants. In addition to solving the symptoms of zinc deficiency, it can also enhance the ability of plants to resist diseases, so as to relatively play a bactericidal effect. Contents of the invention [0003] The invention proposes a method for preparing fenitrothion. The i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N57/14A01P3/00A01N47/14
Inventor 贾玉林
Owner QINGDAO HAOLITE BIOLOGICAL PESTICIDE