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Production method of monopotassium phosphate with by-product cinnamon special fertilizer

A technology of potassium dihydrogen phosphate and production method, applied in chemical instruments and methods, applications, phosphorus compounds, etc., can solve the problems of low purity of potassium dihydrogen phosphate and unavailability of active ingredients, etc.

Inactive Publication Date: 2015-01-28
GUIZHOU KAILIN GRP CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In the process of producing potassium dihydrogen phosphate from wet-process phosphoric acid, the purity of potassium dihydrogen phosphate is not high, and the filtrate also contains a large amount of unprecipitated carbonamide, K + 、H 2 PO 4 ～ 、HPO 4 2～ 、PO 4 3～ and other substances, the researchers of the present invention have studied the composition content of traditional cinnamon special fertilizer and the absorption of cinnamon from a large number of prior art documents and years of exploration and research, and have effectively explored the production of phosphoric acid diphosphate from wet-process phosphoric acid. The cinnamon special fertilizer is prepared from the filtrate of potassium hydrogen phosphate to solve the problem that the active ingredients in the filtrate of potassium dihydrogen phosphate produced by wet process phosphoric acid cannot be used, etc. There is no report in domestic fertilizer production

Method used

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  • Production method of monopotassium phosphate with by-product cinnamon special fertilizer
  • Production method of monopotassium phosphate with by-product cinnamon special fertilizer
  • Production method of monopotassium phosphate with by-product cinnamon special fertilizer

Examples

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Effect test

Embodiment 1

[0064] A production method for preparing a special fertilizer for cinnamon by-product of potassium dihydrogen phosphate. Phosphoric acid and carbonamide are mixed at a molar ratio of 1.2:1, and the temperature is raised from 80°C to 160°C at a heating rate of 5°C / min, and the reaction is stirred for 4 ~5h, the intermediate was separated; then the intermediate was mixed with the basic potassium salt at a molar ratio of 1:1.3, and after the reaction was completed, a slurry containing nitrogen, phosphorus, and potassium was obtained, and the nitrogen, phosphorus, and potassium Place the slurry in a cooling crystallizer to cool down to 40-45°C, carry out crystallization and filtration treatment, and circulate the filtrate in the cooling crystallizer for crystallization treatment. The obtained filter cake is potassium dihydrogen phosphate product, and the component content in the filtrate is detected; Add alkaline calcium and phosphoric acid to the filtrate, when the pH of the solut...

Embodiment 2

[0072] A production method for preparing a special fertilizer for cinnamon by-product of potassium dihydrogen phosphate. Phosphoric acid and carbonamide are mixed at a molar ratio of 1.6:1, and the temperature is raised from 80°C to 160°C at a heating rate of 5°C / min, and the reaction is stirred for 4 ~5h, the intermediate was separated; then the intermediate was mixed with the basic potassium salt at a molar ratio of 1:1.3, and after the reaction was completed, a slurry containing nitrogen, phosphorus, and potassium was obtained, and the nitrogen, phosphorus, and potassium Place the slurry in a cooling crystallizer to cool down to 40-45°C, carry out crystallization and filtration treatment, and circulate the filtrate in the cooling crystallizer for crystallization treatment. The obtained filter cake is potassium dihydrogen phosphate product, and the component content in the filtrate is detected; Add alkaline calcium and phosphoric acid to the filtrate, when the pH of the solut...

Embodiment 3

[0079] A production method for preparing a special fertilizer for cinnamon by-product of potassium dihydrogen phosphate. Phosphoric acid and carbonamide are mixed at a molar ratio of 1.4:1, and the temperature is raised from 80°C to 160°C at a heating rate of 5°C / min, and the reaction is stirred for 4 ~5h, the intermediate was separated; then the intermediate was mixed with the basic potassium salt at a molar ratio of 1:1.2, and after the reaction was completed, a slurry containing nitrogen, phosphorus, and potassium was obtained, and the nitrogen, phosphorus, and potassium Place the slurry in a cooling crystallizer to cool down to 40-45°C, carry out crystallization and filtration treatment, and circulate the filtrate in the cooling crystallizer for crystallization treatment. The obtained filter cake is potassium dihydrogen phosphate product, and the component content in the filtrate is detected; Add alkaline calcium and phosphoric acid to the filtrate, when the pH of the solut...

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Abstract

The invention relates to the technical field of chemical industry, and in particular to a production method of monopotassium phosphate with a by-product cinnamon special fertilizer. Coefficients such as temperature in a wet process for preparation of monopotassium phosphate are changed to improve the purity of monopotassium phosphate product and to produce a compound fertilizer containing N, P and K in combined state; and formaldehyde is added in a filtrate to prepare a controlled release compound fertilizer. The method can improve the purity of monopotassium phosphate, besides the produced cinnamon special fertilizer has good absorption rate; and the produced cinnamon special fertilizer meets the nutritional needs of each period in the growth cycle, greatly increases cinnamon yield, and is a high efficient compound fertilizer.

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 cinnamon by-product of potassium dihydrogen phosphate. Background technique [0002] Potassium dihydrogen phosphate is widely used in almost all types of crops such as various types of economic crops, grain, melons and fruits, vegetables, etc. It has the effect of overcoming the nutrient deficiency caused by the aging and absorption capacity of the root system in the later stage of crop growth. It is a new type of high-concentration phosphorus and potassium two-element compound fertilizer, and it is an efficient phosphorus and potassium compound fertilizer in agriculture. At present, many domestic fertilizer manufacturers are producing potassium dihydrogen phosphate compound fertilizer. The production methods mainly include neutralization method, extraction method, ion exchange method, metathesis method, direct ...

Claims

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Application Information

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IPC IPC(8): C01B25/30C05G1/00
Inventor 杜绍伦高贵龙廖吉星薛涛魏发展陈肖虎张志梅赵伟毅曾舒黄芳
Owner GUIZHOU KAILIN GRP CO LTD
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