A kind of clean preparation method of glufosinate-ammonium
A technology of glufosinate-ammonium and glufosinate-ammonium sodium salt is applied in chemical instruments and methods, compounds of Group 5/15 elements of the periodic table, organic chemistry, etc. Serious corrosion of equipment and other problems, to achieve the effect of more appearance and color, high atomic utilization, and not easy to absorb moisture
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0034] Take 230 g of aminobutyronitrile aqueous solution, add 128 g (1.6 mol) of 50% sodium hydroxide therein, raise the temperature to 85° C. and react for 2 h, during which ammonia gas is continuously released, and the ammonia gas is absorbed and recovered with water. After the reaction is complete, an aqueous solution of glufosinate-ammonium sodium salt is obtained; the aqueous solution of glufosinate-ammonium sodium salt is cooled to 0°C, and then CO 2 To supersaturation, then raise the temperature to 30°C and feed ammonia gas to make the solution pH=8-9, continue to pass ammonia gas for 1 h, then stir for 3 h, a large amount of inorganic salt sodium bicarbonate is precipitated, filter the inorganic salt, and concentrate the filtrate to obtain 50% glufosinate-ammonium solution 150g, yield 92.6%.
Embodiment 2
[0036] Take 230 g of aminobutyronitrile aqueous solution, add 128 g (1.6 mol) of 50% sodium hydroxide therein, raise the temperature to 85° C. and react for 2 h, during which ammonia gas is continuously released, and the ammonia gas is absorbed and recovered with water. After the reaction was complete, an aqueous solution of glufosinate-ammonium sodium salt was obtained; the aqueous solution of glufosinate-ammonium sodium salt was cooled to 30°C, and 164g NH 4 HCO 3, then stirred for 5h, a large amount of inorganic salts were precipitated, the inorganic salts were filtered, the filtrate was concentrated, 200g of methanol was added to freeze crystallization, a large amount of white crystals were precipitated, the white crystals were filtered, and after drying, 73.5g of glufosinate-ammonium was obtained with a purity of 98%. 90.9%.
Embodiment 3
[0038] Take 1150 g of aminobutyronitrile aqueous solution, add 640 g (8 mol) of 50% sodium hydroxide therein, raise the temperature to 85° C. and react for 2 h, during which ammonia gas is continuously released, and the ammonia gas is absorbed and recovered with water. After the reaction is complete, an aqueous solution of glufosinate-ammonium sodium salt is obtained; the aqueous solution of glufosinate-ammonium sodium salt is cooled to 0°C, and CO 2 To supersaturation, then raise the temperature to 25°C, feed ammonia gas to make the pH = 8-9, continue to pass ammonia gas for 1 h, then stir for 3 h, a large amount of inorganic salt sodium bicarbonate is precipitated, filter the inorganic salt, concentrate the filtrate, and pass through A large amount of white crystals were precipitated by freezing, filtered, and dried to obtain 372 g of glufosinate-ammonium with a purity of 97% and a yield of 91.1%.
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More