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A kind of synthesis technique 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: 2015-10-28
ANHUI GUANGXIN AGROCHEM
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A kind of synthesis technique of hexazinone
  • A kind of synthesis technique of hexazinone
  • A kind of synthesis technique of hexazinone

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Embodiment Construction

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

[0029]The invention provides a kind of synthetic technique of hexazinone, and described technique comprises the following steps: (1) synthetic of ethyl chloroformate: first pass into ethanol in esterification tower, pass into phosgene slowly, in control tower The reaction temperature is 35-40° C., and the feeding time is 1 hour. The generated ethyl chloroformate overflows from the top of the esterification tower and enters the ethyl chloroformate storage tank for standby use. (2) Synthesis of ethyl cyanocarbamate: add water in 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, Put the filtrate into the amination kettle at one time with a pump, add the ethyl chloroformate generated in step 1 dropwise under cooling and cooling, and c...

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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 hexazinone. Background technique [0002] Hexazinone is mainly used in the maintenance and opening of forest fire breaks, tending young forests, forest transformation, and weeding and irrigation along railways, highways, airports, warehouses, and docks, and has special effects on the prevention of "Canada solidago". This product is extremely lethal to forest weeds, shrubs, vines and other plants. It can be absorbed by the stems and leaves of plants, conduct conduction through the xylem inside the plants, and directly interfere with the photosynthesis of plants, causing plant metabolism disorder and death. It can cause plant death; it can also be absorbed by the root system of plants, and then transmitted to stems and leaves to interfere with plant photosynthesis, cause metabolic disorders and cause plant death. Whether hexazinone is used...

Claims

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Application Information

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Patent Type & Authority Patents(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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