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Synthetic method of triazine net series herbicides

A technology of s-triazine and synthesis method, which is applied in the synthesis of s-triazine net series herbicides and the synthesis field of s-triazine herbicides. Deal with difficult problems and achieve considerable economic and social benefits, good product quality and high yield

Active Publication Date: 2017-08-29
SHANDONG WEIFANG RAINBOW CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the various shortcomings of the current sodium methyl mercaptide method to produce net series herbicides, the present invention provides a synthetic method for the net series herbicides of triazines, which is environmentally friendly and solves the problems of the current sodium methyl mercaptide method. Disadvantages such as difficulty in wastewater treatment and difficulty in controlling the odor of sodium methyl mercaptide

Method used

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  • Synthetic method of triazine net series herbicides

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] In a 1L reaction kettle, put 350mL of isopropanol, 245.88g of 20wt% sodium methyl mercaptide liquid and 160.00g of 97wt% atrazine respectively. After sealing, stir and mix and heat up to 115°C for 50min. The pressure was 0.34 MPa, and the temperature was lowered to 60° C. after the reaction. Stand still, divide the water, and the water layer is almost odorless after the solvent is recovered by distillation. The oil layer was transferred to a 500mL four-neck flask to distill and recover the solvent, and the residue was poured into a tray, cooled, crystallized and pulverized to obtain 163.02g of white powder. The content of arazine was 97.62% as determined by HPLC, and the yield based on atrazine was 97.31%.

Embodiment 2

[0034] In a 1L reaction kettle, put 350mL of isopropanol, 247.14g of 20wt% sodium methyl mercaptide liquid and 160.00g of 97% atrazine respectively. After sealing, stir and mix and heat up to 120°C for 45min. The pressure was 0.37MPa, and the temperature was lowered to 62°C after the reaction. Stand still, separate the water, and the water layer has no peculiar smell after the solvent is recovered by distillation. The oil layer was transferred to a 500mL four-neck flask to distill and recover the solvent, and the residue was poured into a tray, cooled, crystallized and pulverized to obtain 164.81g of white powder. The content of arazine was 96.88% as detected by HPLC, and the yield based on atrazine was 97.63%.

Embodiment 3

[0036] In a 1L reaction kettle, put 350mL of isopropanol, 249.66g of 20wt% sodium methyl mercaptide liquid and 160.00g of 97% atrazine respectively. After sealing, stir and mix and heat up to 118°C for 50min. The pressure is 0.35 MPa, and the temperature is lowered to 60° C. after the reaction. Stand still, divide the water, and the water layer is almost odorless after the solvent is recovered by distillation. The oil layer was transferred to a 500mL four-neck flask to distill and recover the solvent, and the residue was poured into a tray, cooled, crystallized and pulverized to obtain 165.48g of white powder. The content of arazine detected by HPLC was 96.97%, and the yield based on atrazine was 98.12%.

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Abstract

The invention discloses a synthesis method of an s-triazine clean-series weedicide. An s-triazine Jin-series weedicide and sodium methyl mercaptide used as raw materials are synthesized under closed conditions to obtain the s-triazine clean-series weedicide technical toxicant. The method solves the problems of uncontrollable smell, complex wastewater treatment and the like in the existing technique, enhances the reaction efficiency and yield, lowers the power and raw material consumption, lowers the production cost, and has the advantages of accessible reaction raw materials, closed reaction process, controllable smell, no use of catalyst, environment friendliness, high controllability, high efficiency and the like; and the obtained product has high quality and high yield, has wide application range, and can bring in considerable economic benefits and social benefits after implementing industrialization.

Description

technical field [0001] The invention relates to a synthesis method of a s-triazine herbicide, in particular to a synthesis method of a s-triazine herbicide series, and belongs to the technical field of herbicide preparation. technical background [0002] Triazine herbicides are one of the most important types of modern herbicides. Since A.Gast discovered the herbicidal activity of Chlorazine in 1952 and published the first report in 1955, it has created a new era of homogeneous herbicides. The research on triazine herbicides, especially after the discovery of the high herbicidal activity of Simazine and Trietazine in 1956, these herbicides developed rapidly. The structural formula of the s-triazine herbicide is as follows, when X in the formula is -Cl-, it is a s-triazine herbicide series, and when X is -S-, it is a s-triazine herbicide series. [0003] [0004] The research and development and marketing of Jing series herbicides are relatively early, including terbuzin,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D251/52A01P13/00
CPCC07D251/52
Inventor 孙国庆侯永生迟志龙李文涛周长涛
Owner SHANDONG WEIFANG RAINBOW CHEM
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