Method for preparing glyphosate potassium salt granules

Abstract

The invention relates to a preparation method for producing glyphosate potassium salt granules by using glyphosate wet powder, which belongs to the field of chemical industry. The preparation method comprises four steps of mixing, charging, granulating and drying to obtain a finished product. The soluble glyphosate potassium salt granules can be obtained through the reaction of the glyphosate wet powder and alkali containing potassium cations or alkali potassium salt, and the glyphosate wet powder is directly adopted for the reaction. Compared with the prior art, the glyphosate wet powder is directly adopted for the reaction so as to save the energy consumption for drying glyphosate acid; steps of adding a solvent, post-treating the solvent and the like are saved; the reaction heat and the difficult production caused by the generated water are overcome by condensing, cooling and dewatering; the process is simple, and can reduce the production energy consumption and improve the production efficiency; and meanwhile, the integral process is simple, can reduce the production energy consumption and improve the production efficiency, and is suitable for popularization and application.

Description

technical field [0001] The invention relates to a preparation method for producing glyphosate potassium salt solid granules from glyphosate wet powder, which belongs to the field of chemical industry. Background technique [0002] Glyphosate is an excellent herbicide that kills herbicides. It has been rapidly promoted in the market since it was first developed by Monsanto in 1971. It is mainly used for field weeding of glyphosate-resistant transgenic crops, weeding of non-cultivated land, and planting of no-tillage crops. At present, the global pesticide market sales are as high as 30 billion U.S. dollars, of which herbicides are about 15 billion U.S. dollars, accounting for 50% of the entire pesticide market, and my country's herbicides account for about 30% of the entire pesticide market. There are about 600 varieties of herbicides in the world, of which glyphosate accounts for up to 30% of the total global herbicides. In recent years, glyphosate has been occupying the f...

AI Technical Summary

Problems solved by technology

Due to the special alkali metal properties of potassium, the solubility of glyphosate potassium salt in water is very large, and the reaction between alkali containing potassium ions and glyphosate acid will generate water at the same time, so it is difficult to control the amount of water added in the reaction. After the reaction, The wet product is not easy to dry, and it takes a long time to cool and crystallize after the reaction

In addition, in the early stage of the reaction, it needs to consume a lot of energy to dry glyphosate acid, and the steps of adding solvent and post-treatment of solvent are redundant and complicated, and the reaction heat and water generated during the process will cause production difficulties