A kind of production method for preparing special fertilizer for flax by-product of tripotassium phosphate
A technology of tripotassium phosphate and its production method, which is applied in the direction of chemical instruments and methods, applications, phosphorus compounds, etc., can solve problems affecting the quality of tripotassium phosphate, waste of element resources, environmental pollution, etc., and achieve significant environmental protection value and economic benefits. The effect of avoiding the discharge of waste liquid and reducing the production cost
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Embodiment 1
[0051] A production method for preparing special fertilizer for tripotassium phosphate by-product flax,
[0052] (1) Preparation of intermediate slurry: Put phosphoric acid and carbonamide into a stirred reactor at a molar ratio of 2:1, and control the reaction temperature to 103°C, and stir at a constant stirring speed of 60r / min for 30min. Obtain intermediate slurry;
[0053] (2) Add potassium hydroxide: to step 1) prepare and obtain intermediate slurry and add potassium hydroxide, the concentration of the potassium hydroxide added is 30%, and the addition is 3 times of carbonamide addition, and control temperature of reaction is At 65°C, stir and react at a stirring speed of 50r / min for 50min to obtain tripotassium phosphate slurry;
[0054] (3) Crystallization separation: the tripotassium phosphate slurry obtained in step 2) is cooled and crystallized in a reaction kettle, the temperature during cooling and crystallization is 20°C, and the content of nitrogen, phosphorus ...
Embodiment 2
[0059] A production method for preparing special fertilizer for tripotassium phosphate by-product flax,
[0060] (1) Preparation of intermediate slurry: put phosphoric acid and carbonamide into a stirred reactor at a molar ratio of 1.95:1, and control the reaction temperature at 96°C, and stir at a constant stirring speed of 50r / min for 25min. Obtain intermediate slurry;
[0061] (2) Add potassium hydroxide: to step 1) prepare and obtain intermediate slurry and add potassium hydroxide, the concentration of the potassium hydroxide added is 30%, and the addition is 2 times of carbonamide addition, and control temperature of reaction is At 65°C, stir and react at a stirring speed of 50r / min for 45min to obtain tripotassium phosphate slurry;
[0062] (3) Crystallization separation: the tripotassium phosphate slurry obtained in step 2) is cooled and crystallized in a reaction kettle, the temperature during cooling and crystallization is 20°C, and the content of nitrogen, phosphoru...
Embodiment 3
[0067] A production method for preparing special fertilizer for tripotassium phosphate by-product flax,
[0068] (1) Preparation of intermediate slurry: put phosphoric acid and carbonamide into a stirred reactor at a molar ratio of 2.05:1, and control the reaction temperature to 106°C, and stir at a constant stirring speed of 70r / min for 35min. Obtain intermediate slurry;
[0069] (2) Add potassium hydroxide: to step 1) prepare and obtain intermediate slurry and add potassium hydroxide, the concentration of the potassium hydroxide added is 30%, and the addition is 3 times of carbonamide addition, and control temperature of reaction is At 65°C, stir and react at a stirring speed of 50r / min for 55min to obtain tripotassium phosphate slurry;
[0070](3) Crystallization separation: the tripotassium phosphate slurry obtained in step 2) is cooled and crystallized in a reaction kettle, the temperature during cooling and crystallization is 20°C, and the content of nitrogen, phosphoru...
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