A production method for preparing special fertilizer for kiwi fruit 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 the problems of nitrogen, phosphorus and potassium resource waste environment, weak growth potential, high requirements, etc., and achieve significant economic benefits, Effect of production cost reduction
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Embodiment 1
[0048] A production method for preparing a special fertilizer for kiwifruit by-product of tripotassium phosphate,
[0049] (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 104°C, and stir at a constant stirring speed of 65r / min for 28min. Obtain intermediate slurry;
[0050] (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 80°C, stir and react at a stirring speed of 40r / min for 60min to obtain tripotassium phosphate slurry;
[0051] (3) Crystallization separation: the tripotassium phosphate slurry obtained in step 2) is cooled and crystallized in a reactor, and the temperature during cooling and crystallization is 25° C., and the content of nitrogen, ...
Embodiment 2
[0056] A production method for preparing a special fertilizer for kiwifruit by-product of tripotassium phosphate,
[0057] (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 94°C, and stir at a constant stirring speed of 55r / min for 23min, Obtain intermediate slurry;
[0058] (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 50°C, stir and react at a stirring speed of 35r / min for 40min to obtain tripotassium phosphate slurry;
[0059] (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,...
Embodiment 3
[0064] A production method for preparing a special fertilizer for kiwifruit by-product of tripotassium phosphate,
[0065] (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 at 98°C, and stir at a constant stirring speed of 60r / min for 25min. Obtain intermediate slurry;
[0066] (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 2.5 times of carbonamide addition, and control temperature of reaction is At 65°C, stir and react at a stirring speed of 38r / min for 50min to obtain tripotassium phosphate slurry;
[0067] (3) Crystallization separation: the tripotassium phosphate slurry obtained in step 2) is cooled and crystallized in a reactor, the temperature during cooling and crystallization is 23°C, and the content of nitrogen, phosphor...
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