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Preparation method of special fertilizer for carrots

A preparation method and technology for special fertilizers, applied in chemical instruments and methods, applications, phosphate fertilizers, etc., can solve the problems of low purity of potassium dihydrogen phosphate products, waste of potassium dihydrogen phosphate, etc., and achieve significant environmental protection value and economic benefits, production. The effect of cost reduction and significant economic benefits

Inactive Publication Date: 2015-01-28
GUIZHOU UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the process of preparing potassium dihydrogen phosphate products, incomplete crystallization of potassium dihydrogen phosphate will cause a large amount of waste of potassium dihydrogen phosphate, and excessive crystallization of potassium dihydrogen phosphate will bring a large amount of impurities into the product of potassium dihydrogen phosphate. Then make the purity of potassium dihydrogen phosphate product lower
By searching on the Internet, there is no patent literature or report that solves this technical problem

Method used

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  • Preparation method of special fertilizer for carrots
  • Preparation method of special fertilizer for carrots
  • Preparation method of special fertilizer for carrots

Examples

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Effect test

Embodiment 1

[0041] A preparation method of special fertilizer for carrots, using phosphoric acid and carbonamide at a molar ratio of 1.1:1 to add into 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 for 120 minutes , then cool the temperature to 35°C at a speed of 3°C / min, and then centrifuge to obtain the urea phosphate intermediate; add the intermediate and basic potassium salt to the reaction kettle at a molar ratio of 1:1.2 to mix and react, adjust The pH value of reaction is 9, is 200r / min stirring reaction 60min with stirring speed, after reaction finishes, obtain the slurry containing nitrogen, phosphorus and potassium, place this slurry in cooling crystallizer and circulate crystallization treatment, detect and analyze filtrate simultaneously, When the nitrogen content in the filtrate is 10%, the phosphorus pentoxide content is 9%, and the potassium oxide content is 9, stop crystallization and filter, and the fi...

Embodiment 2

[0043] A preparation method of special fertilizer for carrots, using phosphoric acid and carbonamide in a molar ratio of 1.3:1 to add into 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 for 100 minutes , then cooled the temperature to 45°C at a speed of 3°C / min, and then centrifuged to obtain the urea phosphate intermediate; the intermediate and potassium hydroxide were added to the reactor at a molar ratio of 1:1.4 to mix and react to adjust the reaction The pH value is 10, and the stirring speed is 250r / min stirring reaction 40min, after the reaction finishes, obtain the slurry containing nitrogen, phosphorus and potassium, place the slurry in a cooling crystallizer for circulation crystallization treatment, and detect and analyze the filtrate simultaneously, when the filtrate When the nitrogen content is 13%, the phosphorus pentoxide content is 6%, and the potassium oxide content is 6, stop crystallizati...

Embodiment 3

[0045] A preparation method of special fertilizer for carrots, using phosphoric acid and carbonamide in a molar ratio of 1.2:1 to add into 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 for 110 minutes , and 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 potassium hydroxide were added to the reactor at a molar ratio of 1:1.3 to mix and react to adjust the reaction The pH value of the solution is 9.5, and the stirring speed is 220r / min. After the 50min stirring reaction, the slurry containing nitrogen, phosphorus and potassium is obtained. When the nitrogen content is 12%, the phosphorus pentoxide content is 8%, and the potassium oxide content is 8%, stop crystallization and filter, and the filter cake is potassium dihydrogen phosphate product; add CaSO to the filtrate 4 , MgSO 4 , ZnSO 4 , Fe 2 + Chelates, ...

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Abstract

The invention relates to the technical field of chemical industry, and discloses a preparation method of a special fertilizer for carrots. The method comprises the following steps: reacting phosphoric acid with carbomite to prepare an intermediate, reacting the intermediate with an alkaline potassium salt to prepare potassium dihydrogen phosphate, controlling the content ratio of nutrients in a filtrate in the potassium dihydrogen phosphate crystallizing process, and adding trace element compounds to the potassium dihydrogen phosphate separated filtrate in order to prepare the special fertilizer for carrots. The special fertilizer for carrots is prepared by analyzing the ratio of nutrients required by the growth process of the carrots, so the preparation method has the advantage of carrot output improvement, no emission of waste liquids in the production process, no pollution to environment, high economic value and environmental benefit, and high purity of the byproduct potassium dihydrogen phosphate.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a preparation method of special carrot fertilizer. Background technique [0002] Carrots are also known as yellow radish, clove radish, calabash and carrot, also known as calabash, beetroot, carrot, yellow radish, etc. It can be fried, cooked, eaten raw, pickled, pickled, etc. Storable. Distributed all over the world, it is cultivated in the north and south of China, and its output accounts for the second place in root vegetables. The fleshy roots are rich in sucrose, glucose, starch, carotene, potassium, calcium, phosphorus, etc. Each 100g fresh weight contains 1.67-12.1mg of carotene, which is 5-7 times higher than that of tomato. After eating, it is digested and decomposed into vitamin A, which can prevent night blindness and respiratory diseases, and promote children's growth. In addition, it also contains more calcium, phosphorus, iron and other minerals. Eati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/30C05G1/00C05B7/00
Inventor 陈肖虎廖吉星古文全徐圆李纪伟熊成杰王睿朱飞武黄芳金会心
Owner GUIZHOU UNIV
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