Production method of monopotassium phosphate with byproduct fertilizer specially used for towel gourd
A technology of potassium dihydrogen phosphate and its production method, which is applied in the direction of chemical instruments and methods, applications, phosphorus compounds, etc., to achieve the effect of reducing production costs and making up for the cost of impurity removal
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Embodiment 1
[0048] A production method for preparing potassium dihydrogen phosphate byproduct luffa special fertilizer, comprising the following steps:
[0049] (1) Preparation and mixing of raw materials: put phosphoric acid and carbonamide in a stirred reactor at a molar ratio of 1.1:1, raise the temperature to 150°C at a heating rate of 10°C / min, and control the stirring rate of the stirring tank to 205r / min to stir Mixed reaction 4.6h, obtain intermediate slurry;
[0050] (2) Preparation of KH 2 PO 4 : Add the alkaline potassium salt of 1.4mol 4h at a uniform speed into the reactor containing the intermediate slurry obtained in step 1), and adopt a stirring speed of 200r / min stirring reaction for 60min to obtain the material containing nitrogen, phosphorus and potassium pulp;
[0051] (3) Cyclic crystallization filtration: the slurry obtained in step 2) containing nitrogen, phosphorus, and potassium is placed in a cooling crystallizer to cool down to a temperature of 25° C., and th...
Embodiment 2
[0058] A production method for preparing potassium dihydrogen phosphate byproduct luffa special fertilizer, comprising the following steps:
[0059] (1) Preparation and mixing of raw materials: put phosphoric acid and carbonamide in a stirred reactor at a molar ratio of 1.3:1, raise the temperature to 90°C at a heating rate of 10°C / min, and control the stirring rate of the stirring tank to 150r / min. Mixed reaction 4.4h, obtain intermediate slurry;
[0060] (2) Preparation of KH 2 PO 4 : Add the alkaline potassium salt of 1.3mol 3h at a uniform speed into the reaction kettle containing the intermediate slurry obtained in step 1), and adopt a stirring speed of 160r / min to stir and react for 40min to obtain the material containing nitrogen, phosphorus and potassium. pulp;
[0061] (3) Cyclic crystallization filtration: the slurry obtained in step 2) containing nitrogen, phosphorus, and potassium is placed in a cooling crystallizer to cool to a temperature of 20° C., and the co...
Embodiment 3
[0067] A production method for preparing potassium dihydrogen phosphate byproduct luffa special fertilizer, comprising the following steps:
[0068](1) Preparation and mixing of raw materials: put phosphoric acid and carbonamide in a stirred reactor at a molar ratio of 1.2:1, raise the temperature to 100°C at a heating rate of 10°C / min, and control the stirring speed of the stirring tank to 180r / min to stir Mixed reaction 4.5h, obtain intermediate slurry;
[0069] (2) Preparation of KH 2 PO 4 : the alkaline potassium salt 3.5h of 1.35mol is added in the reaction still containing the intermediate slurry that step 1) makes at a constant speed again, and adopting stirring speed is 180r / min stirring reaction 50min, obtains nitrogen, phosphorus, potassium slurry;
[0070] (3) Cyclic crystallization filtration: the slurry obtained in step 2) containing nitrogen, phosphorus, and potassium is placed in a cooling crystallizer to cool to a temperature of 22° C., and the cooling cycle...
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