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Preparation method of endosulfan

A technology of endosulfan and organic solvents, which is applied in the field of endosulfan equipment, can solve the problems of light, heat, humidity instability, insoluble in water, low volatility, etc., to avoid fire accidents, simplify the production process, and increase the dehydration speed fast effect

Inactive Publication Date: 2015-03-18
QINGDAO HAOLITE BIOLOGICAL PESTICIDE
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Problems solved by technology

[0002] The pure product of endosulfan is white powder, the 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, unstable to light, heat and humidity, It is easy to decompose into carbon disulfide, and it is easy to decompose and release carbon disulfide when it encounters alkaline substances or copper, mercury and other substances, and the effect is reduced, and the volatility is small

Method used

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Embodiment Construction

[0008] The preparation method of endosulfan, the steps are:

[0009] In the first step, the preparation of endosulfan adopts the mixed distillation and dehydration of the wet product of endosulfan with the organic solvent.

[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...

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PUM

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Abstract

The invention relates to a preparation method of endosulfan. The preparation method comprises the following steps of firstly, mixing an organic solvent and a wet product of endosulfan, distilling and dehydrating to prepare endosulfan; 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 endosulfan. Background technique [0002] The pure product of endosulfan is white powder, the 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, unstable to light, heat and humidity, It is easy to decompose into carbon disulfide, and when it encounters alkaline substances or copper, mercury and other substances, it is easy to decompose and release carbon disulfide to reduce its effect, and its volatility is small. 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 preparation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N47/14A01P1/00A01P3/00A01N43/24
Inventor 贾玉林
Owner QINGDAO HAOLITE BIOLOGICAL PESTICIDE
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