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A kind of preparation method of rice bean nutrient fertilizer

A preparation method and nutrient fertilizer technology, which are applied in the directions of chemical instruments and methods, phosphate fertilizers, fertilization devices, etc., can solve the problems of difficulty in meeting the needs of phosphorus and potassium elements in rice beans, unfavorable long-term development, and changing soil structure, and achieve significant environmental protection. Value and economic benefits, make up for the cost of impurity removal, high purity

Inactive Publication Date: 2016-08-24
GUIZHOU UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a preparation method of rice bean nutrient fertilizer to solve the problem that if the amount of application of quick-acting nitrogen fertilizer is small when planting rice beans, it is difficult to meet the demand of rice beans for nitrogen. Rice beans require phosphorus and potassium elements. If the amount of application is too much, nitrogen elements will accumulate in the soil. Not only the cost of fertilization is high, but also the soil structure will be changed, which is not conducive to long-term development.

Method used

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  • A kind of preparation method of rice bean nutrient fertilizer
  • A kind of preparation method of rice bean nutrient fertilizer

Examples

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Embodiment 1

[0040] A preparation method of rice bean nutrient fertilizer, using phosphoric acid and carbonamide in a molar ratio of 1.1:1 to add to a reactor and mix them, then raise the temperature of the two mixtures to 100°C at a heating rate of 5°C / min, and stir to react 120min, then cooled the temperature to 30°C at a speed of 3°C / min, and then centrifuged to obtain the intermediate of urea phosphate; the intermediate and sodium hydroxide were added to the reaction kettle at a molar ratio of 1:0.9 to mix and react. The temperature of the reaction is 60°C, the pH value of the reaction is adjusted to 8.5, and the reaction is stirred at a stirring speed of 200r / min for 60min. After the reaction is completed, a slurry containing nitrogen and phosphorus is obtained, and the slurry is placed in a cooling crystallizer for circular crystallization treatment, while detecting and analyzing the filtrate, when the molar ratio of nitrogen and phosphorus in the filtrate is 8:2, stop crystallization...

Embodiment 2

[0043] A preparation method of rice bean nutrient fertilizer, using phosphoric acid and carbonamide in a molar ratio of 1.3:1 to add to a reactor and mix them, then raise the temperature of the two mixtures to 120°C at a heating rate of 5°C / min, and stir to react 100min, then cool the temperature to 45°C at a speed of 3°C / min, and then centrifuge to obtain the urea phosphate intermediate; add the intermediate and sodium hydroxide to the reaction kettle at a molar ratio of 1:1.1 to mix and react, adjust The pH value of the reaction is 9.5, and the stirring speed is 250r / min and the stirring reaction is 40min. After the reaction is completed, a slurry containing nitrogen and phosphorus is obtained, which is placed in a cooling crystallizer for circulation crystallization treatment, and the filtrate is detected and analyzed simultaneously. When the molar ratio of nitrogen and phosphorus is 10:3, stop crystallization and filter, and the filter cake is sodium dihydrogen phosphate pr...

Embodiment 3

[0046] A preparation method of rice bean nutrition fertilizer, using phosphoric acid and carbonamide in a molar ratio of 1.2:1 to add to a reactor and mix them, then raise the temperature of the two mixtures to 110°C at a heating rate of 5°C / min, and stir to react 110min, then cooled the temperature to 40°C at a speed of 3°C / min, and then centrifuged to obtain the urea phosphate intermediate; the intermediate and sodium hydroxide were added to the reactor at a molar ratio of 1:1 to mix and react. The pH value of the reaction is 9, the stirring speed is 220r / min and the stirring reaction is 50min. After the reaction is completed, a slurry containing nitrogen and phosphorus is obtained. When the molar ratio of nitrogen and phosphorus is 9:2.5, stop crystallization and filter, and the filter cake is sodium dihydrogen phosphate product; add CaSO to the filtrate 4 , MgSO 4 , ZnSO 4 , Fe 2 + Chelates, H 3 BO 3 A variety of mixtures are adjusted to be the primary product of ric...

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Abstract

The invention relates to the technical field of chemical engineering, and discloses a preparation method of a rice bean nutrition fertilizer. The proportion of nutrient elements of the rice bean nutrition fertilizer is determined by analyzing the quantity of the nutrient elements which are required to absorb in the growing process of rice beans; an intermediate is prepared by performing reaction on phosphoric acid and carbamide; the reaction on the intermediate and alkaline sodium is carried out to prepare sodium dihydrogen phosphate; the requirement on the growth of the rice beans can be met by controlling the nutrient content rates of nitrogen and phosphorus of filtering liquid in a crystallizing process of sodium dihydrogen phosphate, and potassium and other medium trace element compounds are added into sodium dihydrogen phosphate separated filtering liquid to prepare the rice bean nutrition fertilizer. According to the method, the purity of sodium dihydrogen phosphate is improved; by analyzing the proportion of the nutrient elements required in the growing process of the rice beans, the rice bean nutrition fertilizer is prepared, so that the yield of the rice beans is improved, the drainage of waste liquid in the production process of the fertilizers is avoided, and the pollution to the environment is also avoided.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a preparation method of rice bean nutrient fertilizer. Background technique [0002] Sodium dihydrogen phosphate is the raw material for manufacturing sodium hexametaphosphate and sodium pyrophosphate, mainly used in tanning, boiler water treatment, as a quality improver and baking powder, and as a buffer and fermentation powder in the food industry and fermentation industry Raw materials, also used as feed additives, detergents and dyeing auxiliaries. Sodium dihydrogen phosphate is colorless crystal or white crystalline powder, odorless, salty and sour. Heating to 100°C loses all crystal water, and turns into sodium metaphosphate when heated. Soluble in water, almost insoluble in ethanol, its aqueous solution is acidic. At present, there are two commonly used methods for preparing sodium dihydrogen phosphate, one is sodium dihydrogen phosphate neutralization method,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B25/30C05G1/00C05B7/00
Inventor 陈肖虎廖吉星高贵龙郑培俊唐涛薛涛林玉喜赵伟毅曾舒李军旗
Owner GUIZHOU UNIV
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