A kind of preparation method of glyphosate ammonium salt former medicine
A technology of glyphosate ammonium salt and glyphosate, which is applied in the field of pesticides, can solve the problems of high pressure reaction, such as safety, huge investment, and complicated process, and achieve the effects of energy saving, low investment, and simple process
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[0027] The invention provides a kind of preparation method of glyphosate ammonium salt former medicine, comprises the following steps:
[0028] a) Prepare glyphosate technical material, water and liquid ammonia according to the molar ratio of 1: (3-4): (1-2);
[0029] b) Mix water and the first dose of glyphosate in a rake dryer, then feed liquid ammonia until the mixture becomes clear from the suspension, then add the remaining glyphosate, and continue Feed remaining liquid ammonia, obtain reaction mixture;
[0030] c) heating and drying the reaction mixture obtained in step b) to obtain glyphosate ammonium salt technical substance and condensed water respectively.
[0031] In the present invention, the technical glyphosate, water and liquid ammonia are firstly prepared according to the molar ratio of 1:(3-4):(1-2). The invention adopts raw materials with a specific ratio, which is beneficial to fully utilize the heat of formation of the reaction in the subsequent mixing pr...
Embodiment 1
[0053] The original drug of glyphosate (95.62%), deionized water and liquid ammonia are pressed at a molar ratio of 1:3.9:1.1, i.e. 1000 g (5.657 mol) of the original drug of glyphosate acid, 400 g (22.222 mol) of deionized water, and the liquid Ammonia 106g (6.24mol) is ready; Get the former drug of glyphosate acid of 1 / 2 amount (500g) and 400g deionized water disposable input in the rake dryer, close the inlet of rake dryer, Set the negative pressure to 0.05MPa, and turn on the dust filter and condenser to make it in normal working condition; then turn on the stirring device of the rake dryer, stir at a speed of 60r / min, and open the ammonia valve under the liquid to Liquid ammonia is fed into the rake dryer, and when the mixed material in the rake dryer becomes clear and transparent from the suspension liquid through the sight glass, close the ammonia valve under the liquid to stop the ammonia flow; then turn on the rake dryer Put the remaining 1 / 2 amount (500g) of glyphosa...
Embodiment 2
[0055] The original drug of glyphosate (95.62%), deionized water and liquid ammonia are pressed at a molar ratio of 1:3.5:1.5, that is, 1000 g (5.657 mol) of the original drug of glyphosate acid, 356 g (19.80 mol) of deionized water, and the liquid Ammonia 110g (6.50mol) is ready; Get the former medicine of glyphosate acid of 1 / 2 amount (500g) and 356g deionized water disposable input in the rake dryer, close the inlet of rake dryer, Set the negative pressure to 0.05MPa, and turn on the dust filter and condenser to make it in normal working condition; then turn on the stirring device of the rake dryer, stir at a speed of 60r / min, and open the ammonia valve under the liquid to Liquid ammonia is fed into the rake dryer, and when the mixed material in the rake dryer becomes clear and transparent from the suspension liquid through the sight glass, close the ammonia valve under the liquid to stop the ammonia flow; then turn on the rake dryer Put the remaining 1 / 2 amount (500g) of g...
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