Novel synthesis process of atrazine

Abstract

The invention discloses a novel synthesis process of atrazine, which has the following process steps of: adding a chemical compound containing a hydroxyl group into isopropylamine according to 1:1-1:3, and mixing to obtain a mixture solution for standby; feeding toluene into a reaction kettle, feeding cryosel into a cooling jacket to be stirred simultaneously, and then feeding cyanuric chloride; evenly adding the mixture solution into the reaction kettle; evenly adding 24 percent-30 percent of caustic soda liquid into the reaction kettle; evenly adding ethylamine into the reaction kettle; and then evenly adding 24 percent-30 percent of caustic soda liquid into the reaction kettle again, and finishing synthetic reaction. The novel synthesis process of the atrazine disclosed by the invention has the beneficial effects that: by adding the chemical compound containing the hydroxyl group into the isopropylamine, the synthetic reaction of the atrazine is more stable and balanced, meanwhile, impurity content generated by excessively vigorous reaction is reduced, and the content and the yield of the atrazine are effectively improved.

Description

[0001] technical field [0002] The invention relates to a synthesis process of a herbicide, in particular to a new synthesis process of atrazine. [0003] Background technique [0004] The chemical name of atrazine is 2-chloro-4-diethylamino-6-isopropylamino-1,3,5-triazine. Its physical and chemical properties: appearance is white powder, melting point is 173-175℃, The vapor pressure at 20°C is 40μPa, and the solubility in water is 33mg / L. It is easily soluble in organic solvents and relatively stable in slightly acidic or slightly alkaline media. However, at higher temperatures, alkali or inorganic acids can make it hydrolysis. Atrazine is a special herbicide for corn, sugarcane, sorghum, etc. It can control annual grass weeds, especially for broad-leaved weeds. It can be mixed with a variety of amide herbicides such as amines to enhance the activity and application range of herbicides. [0005] Atrazine is produced in industry with cyanuric chloride (CN3C13), isoprop...

AI Technical Summary

Problems solved by technology

[0005] Atrazine is produced in industry with cyanuric chloride (CN3C13), isopropylamine, and ethylamine as the main raw materials, and atrazine is obtained through a two-step substitution reaction. Among them, cyanuric chloride is insoluble in water and easily decomposes when it meets water and alkali. Therefore, in industrial production, the synthesis reaction of atrazine selects the reaction of isopropylamine and cyanuric chloride with a concentration of more than 95% to avoid the decomposition of cyanuric chloride and cause the atrazine content to decrease and the impurity content to be too high. However, the concentration of isopropylamine Excessively high will inevitably lead to isopropylamine can not fully, stable, balanced reaction with cyanuric chloride, local reaction violent, exothermic heat causes partial reaction condition unbalance, side reaction product increases, finally causes the rate of return of product atrazine to be low. high