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Preparation technology of methoxyfenozide

A technology of methoxen hydrazide and a preparation process, which is applied in the field of preparation technology of methoxen hydrazide, can solve the problems of difficult sewage discharge, high production cost, increased production burden of enterprises, etc., and achieves reduction of difficulty in wastewater treatment and reduction of reaction process The effect of convenience and reduction of production costs

Inactive Publication Date: 2015-07-29
JIANGSU CHANGQING AGROCHEM NANTONG
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

However, most of the existing methoxyfenozide is prepared in an assembly line, the production cost is relatively high, and a large amount of waste water is generated during the production process, making it difficult to discharge sewage, which further increases the production burden of the enterprise

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] The preparation technology of methoxyfenozide comprises the following steps:

[0014] (1) Condensation reaction: at room temperature, add tert-butylhydrazine hydrochloride and dichloroethane into the condensation kettle, cool down to -6~-5°C with frozen brine through the jacket, add liquid caustic soda dropwise, and let stand to separate layer, separate the water layer to waste water treatment, keep the organic layer at this temperature, add 3-methoxy-2-methylbenzoyl chloride dropwise, control the rate of addition, so that the temperature of the kettle does not exceed 0°C; after 7-9 hours of reaction , the sampling analysis is qualified, then add water to stir, static layering, the water layer is sent to waste water treatment, the organic layer is released under the normal pressure condition of 75~85°C, dichloroethane is released, and toluene is added after cooling down to room temperature to dissolve, and the condensate is obtained. Toluene liquid;

[0015] (2) Acylat...

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PUM

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Abstract

The invention discloses a preparation technology of methoxyfenozide. The preparation technology comprises steps of a condensation reaction and an acylation reaction. The preparation technology has the advantages as follows: intermediate raw materials are recycled and reused, so that the production cost and the waste water treatment difficulty are reduced, the purity of finished products is high, the reaction process is convenient to control, and the requirement of modern pesticide preparation is met.

Description

technical field [0001] The invention relates to a preparation process of methoxyfenozide. Background technique [0002] Methoxyfenozide is a new type of specific phenylhydrazide insecticide with low toxicity, mainly used to control the larvae of Lepidoptera pests, such as beet armyworm, cabbage armyworm, litura, cabbage insect, cotton boll Insects, golden leaf moths, American white moths, pine caterpillars, inchworms and rice borers, etc., suitable for crops such as cruciferous vegetables, solanaceous vegetables, melons, cotton, apples, peaches, rice, forest trees, etc., its high efficiency The performance and environmental friendliness meet the requirements and development trends of modern pesticides. However, most of the existing methoxyfenozide is prepared in an assembly line, the production cost is relatively high, and a large amount of wastewater is generated during the production process, making it difficult to discharge the sewage, which further increases the product...

Claims

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Application Information

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IPC IPC(8): C07C243/38C07C241/04
Inventor 洪晓冬张振明赵晶刘凯
Owner JIANGSU CHANGQING AGROCHEM NANTONG
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