Hexazinone cleaning production technology

A production process, the technology of hexazinone, applied in the field of product production process, can solve the problems of high production cost, environmental pollution, high energy consumption and other problems of production process, and achieve the effect of reducing production cost, reducing reaction process and reducing serious pollution

Inactive Publication Date: 2018-10-23
ANHUI GUANGXIN AGROCHEM
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  • Abstract
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  • Claims
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Problems solved by technology

[0003] The existing production process has high production cost, low efficiency of the reaction process, large energy consumption, low conversion rate, large

Method used

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  • Hexazinone cleaning production technology
  • Hexazinone cleaning production technology
  • Hexazinone cleaning production technology

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Embodiment 1

[0040] like figure 1 As shown, the technical solution adopted in the present invention is: a clean production process of hexazinone, which comprises the following steps: 1). Synthesis of ethyl chloroformate: first in the esterification tower Feed phosgene of 1.05~1.2 parts by weight, then quickly pass into 0.46 parts by weight of ethanol vapor, control the reaction temperature in the tower to 30~40°C, and the feeding time is 30~60min. The top overflows and enters the ethyl chloroformate storage tank for standby; 2). Synthesis of ethyl cyanamide: add 19 parts by weight of water in the hydrolysis kettle, open the jacket steam and heat up to 30-50 ° C, and then to the hydrolysis Drop into 3.4 parts of weight of lime nitrogen in the still to carry out the hydrolysis reaction, the reaction time is 1h, then filter, the filtrate is squeezed into the amination still with a pump, and the ethyl chloroformate generated in step 1 is added dropwise after cooling and cooling. Stir fully an...

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Abstract

The invention discloses a hexazinone cleaning production technology. According to the technology, ethanol, lime nitrogen, cyclohexylamine, dimethylamine, dimethyl sulfate, sodium and phosgene are taken as main raw materials, a series of chemical reactions are carried out in a solvent, and then desolventizing and concentrating, crystallization separation and drying are carried out so as to obtain afinished product of hexazinone. The technology has the advantages that solvent extraction is omitted, the reaction process is reduced, the efficiency is improved, the energy consumption is saved by 10%, and meanwhile, the conversion rate is increased by 5%; the waste water quantity is greatly decreased, a special reactor is used in the cyclization process, the use of dimethylamine is reduced, sothat the phenomenon that great troubles are brought to removal of dimethylamine in the solvent and recovery of the solvent due to the fact that dimethylamine is dissolved in the solvent can be avoided, the severe pollution of dimethylamine to the environment is reduced, the quality of the solvent is guaranteed, and the content of active compounds of hexazinone is qualified, namely, the content ofthe active compounds of hexazinone is greater than or equal to 98%; and the use of a lot of water and dimethylamine is saved, so that the production cost is greatly lowered.

Description

technical field [0001] The invention relates to the technical field of product production technology, in particular to a clean production process 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 hexazino...

Claims

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Application Information

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IPC IPC(8): C07D251/46
CPCC07D251/46
Inventor 过学军徐小兵袁树林刘长庆李红卫吴建平黄显超李波
Owner ANHUI GUANGXIN AGROCHEM
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