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Synthetic process of hexazinone

A synthesis process, the technology of hexazinone, which is applied in the field of synthesis process of hexazinone, can solve the problems of low reaction process efficiency, high production cost, and large amount of waste water, so as to improve efficiency, save energy consumption, and reduce waste water Effect

Active Publication Date: 2014-04-30
ANHUI GUANGXIN AGROCHEM
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  • Abstract
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Problems solved by technology

[0003] The existing production process has high production cost, low reaction process efficiency, large energy consumption, low conversion rate and large waste water volume

Method used

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  • Synthetic process of hexazinone
  • Synthetic process of hexazinone
  • Synthetic process of hexazinone

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Embodiment Construction

[0028] The present invention will be further described in detail below in conjunction with specific embodiments.

[0029]The invention provides a process for synthesizing cycloazinone, the process comprising the following steps: (1) synthesis of ethyl chloroformate: firstly feed ethanol in an esterification tower, slowly feed phosgene, and control the tower The reaction temperature is 35-40 DEG C, the feeding time is 1 hour, and the generated ethyl chloroformate overflows from the top of the esterification tower and enters the ethyl chloroformate storage tank for use. (2) Synthesis of ethyl cyanocarbamate: add water to the hydrolysis kettle, open the jacket steam and heat up to 30-50°C, then put lime nitrogen into the hydrolysis kettle for hydrolysis reaction, the reaction time is 1 hour, then filter, The filtrate is pumped into the amination kettle at one time, and the ethyl chloroformate generated in step 1 is added dropwise under cooling and cooling, and the pH of the react...

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Abstract

The invention provides a synthetic process of hexazinone. The synthetic process comprises the steps of: by taking ethanol, lime nitrogen, cyclohexylamine, dimethylamine, dimethyl sulfate, sodium methoxide and phosgene as main active ingredients, generating a series of chemical reactions in solvent, and carrying out desolventizing and concentration, crystallizing and separating and drying to obtain a finished hexazinone product. According to the synthetic process, the solvent extraction can be omitted, the reaction procedures can be reduced, the efficiency can be improved, the energy consumption can be saved by 10%, and the conversion rate can also be improved by 5%; while the amount of waste water can be greatly decreased, dimethylamine can be recycled, and the quality of solvent can be guaranteed; a great amount of water can be saved, therefore, the production cost can be greatly lowered.

Description

technical field [0001] The invention relates to the field of production technology of products, in particular to a synthesis technology of cycloazinone. Background technique [0002] Cycloazinone is mainly used in the maintenance and opening of forest fire trails, raising young forests, forest stand transformation, and weeding and irrigation along railways, highways, airports, warehouses, and piers, and has special effects on the prevention of "Mongolia canadensis". This product has extremely strong killing power to forest weeds, shrubs, vines and other plants. It can be absorbed by the stems and leaves of plants, and use xylem to conduct conduction inside the plant. It can lead to plant death; it can also be absorbed by the root system of the plant, and then transmitted to the stem and leaves to interfere with the photosynthesis of the plant, causing the metabolic disorder and leading to the death of the plant. Cyclazinone can effectively control a variety of annual and pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D251/46
CPCC07D251/46
Inventor 高焰兵黄金祥过学军李波杨小明胡安胜吴建平程伟家
Owner ANHUI GUANGXIN AGROCHEM
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