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

Inactive Publication Date: 2015-01-14
GUIYANG KAILIN FERTILIZER CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the above technical problems in the prior art, the present invention provides a production method for preparing potassium dihydrogen phosphate by-product loofah special fertilizer, which can avoid a large amount of fertilizer while preparing potassium dihydrogen phosphate product to improve the purity. The loss of potassium dihydrogen phosphate remaining in the mother liquor leads to the technical problem of cost increase in the preparation process of potassium dihydrogen phosphate products; and it is also possible to make full use of the mother liquor according to the needs of loofah, adjust the nutrient components in the mother liquor, and make use of the mother liquor The special fertilizer for loofah prepared by drying can provide better nutrients for loofah, so that the production process of potassium dihydrogen phosphate product and the production process of compound fertilizer are closely combined, reducing the environmental pollution caused by the large discharge of mother liquor characteristics of technical problems

Method used

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  • Production method of monopotassium phosphate with byproduct fertilizer specially used for towel gourd
  • Production method of monopotassium phosphate with byproduct fertilizer specially used for towel gourd
  • Production method of monopotassium phosphate with byproduct fertilizer specially used for towel gourd

Examples

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Effect test

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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Abstract

The invention relates to the technical field of chemical industry and particularly relates to a production method of monopotassium phosphate with a byproduct fertilizer specially used for towel gourd. The content of elements in the fertilizer specially used for towel gourd and the effective absorption of towel gourd to nitrogen, phosphorus and potassium elements are detected and analyzed, and the content of the elements used in the production process are regulated and matched, so that the prepared combined compound fertilizer can meet crop demands to the maximum extent, overhigh cost caused by improper matching of the elements in the production process of a compound fertilizer is reduced, and furthermore the problem that environment pollution caused by soil hardening due to use of the compound fertilizer containing too many elements in soil is avoided.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a production method for preparing a special fertilizer for loofah by-product of potassium dihydrogen phosphate. Background technique [0002] After the common fertilizer is applied to the cultivated land, part of it will be transpired, dissipated and lost with water, part of it will be fixed and utilized by the soil and soil microorganisms, and only part of it will be absorbed and utilized by the crops. Studies have shown that: the utilization rate of urea and ammonium bicarbonate is 20%-46%, phosphate fertilizer (diammonium, monoammonium, heavy calcium) is 10%-25%, and potassium fertilizer is 45%-60%. It can be seen that the utilization rate of ordinary fertilizers is very low. [0003] A loofah needs to absorb more nutrients in a growth cycle, not only nitrogen, phosphorus, and potassium provided by ordinary fertilizers. According to the theory of wooden barrel short...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/30C05G1/00
Inventor 蔺忠建陈肖虎廖吉星高贵龙谢飞薛涛石磊赵伟毅曾舒黄芳
Owner GUIYANG KAILIN FERTILIZER CO LTD
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