A kind of production method for preparing ammonium dihydrogen phosphate by-product sugar beet special fertilizer

A technology of ammonium dihydrogen phosphate and its production method, which is applied in the direction of phosphate, phosphorus oxyacid, application, etc., and can solve the problems of unusable effective components of the filtrate and low purity of ammonium dihydrogen phosphate

Inactive Publication Date: 2017-01-11
GUIZHOU UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In the process of producing ammonium dihydrogen phosphate, the purity of ammonium dihydrogen phosphate is not high, and the filtrate also contains a large amount of unprecipitated carbonamide, 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 sugar beet special fertilizer and the absorption situation of sugar beet 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 special fertilizer for sugar beet is prepared from the filtrate of ammonium hydrogen phosphate, which solves the problems that the purity of ammonium dihydrogen phosphate produced by wet process phosphoric acid is not high, and the active ingredients in the filtrate cannot be used. At the same time, the special fertilizer has a good absorption rate and a controllable release effect. Domestic fertilizer production, no report

Method used

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  • A kind of production method for preparing ammonium dihydrogen phosphate by-product sugar beet special fertilizer
  • A kind of production method for preparing ammonium dihydrogen phosphate by-product sugar beet special fertilizer
  • A kind of production method for preparing ammonium dihydrogen phosphate by-product sugar beet special fertilizer

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Embodiment 1

[0055] A kind of production method of preparing ammonium dihydrogen phosphate by-product sugar beet special fertilizer provided by the present embodiment mainly comprises the following steps:

[0056] 1) Phosphoric acid and carbonamide are mixed, the molar ratio of phosphoric acid and carbonamide is 1.2:1, and the temperature is raised from 80°C to 160°C at a heating rate of 3-8°C / min, stirred and reacted for 4-5h, and separated to obtain Intermediate, then add the intermediate to the aqueous ammonia solution, the molar ratio of the intermediate to the ammonia water is 1:1.4, adjust the temperature to 50-65°C, stir and react for 2-3 hours, after the reaction, carry out cooling crystallization and filtration , the crystallization temperature is 30-35°C, the filtrate is circulated and crystallized in the cooling crystallizer, the obtained filter cake is ammonium dihydrogen phosphate product, and the component content in the filtrate is detected;

[0057] 2) add potassium hydroxi...

Embodiment 2

[0063] A kind of production method of preparing ammonium dihydrogen phosphate by-product sugar beet special fertilizer provided by the present embodiment mainly comprises the following steps:

[0064] 1) Phosphoric acid and carbonamide are mixed, the molar ratio of phosphoric acid and carbonamide is 1.5:1, and the temperature is raised from 80°C to 160°C at a heating rate of 3-8°C / min, stirred for 4-5h, and separated to obtain Intermediate, then add the intermediate to the aqueous ammonia solution, the molar ratio of the intermediate to the ammonia water is 1:1.2, adjust the temperature to 50-65°C, stir and react for 2-3 hours, after the reaction is completed, carry out cooling crystallization and filtration , the crystallization temperature is 30-35°C, the filtrate is circulated and crystallized in the cooling crystallizer, the obtained filter cake is ammonium dihydrogen phosphate product, and the component content in the filtrate is detected;

[0065] 2) add potassium hydrox...

Embodiment 3

[0071] A kind of production method of preparing ammonium dihydrogen phosphate by-product sugar beet special fertilizer provided by the present embodiment mainly comprises the following steps:

[0072] 1) Phosphoric acid and carbonamide are mixed, the molar ratio of phosphoric acid and carbonamide is 1.4:1, and the temperature is raised from 80°C to 160°C at a heating rate of 3-8°C / min, stirred and reacted for 4-5h, and separated to obtain Intermediate, then add the intermediate to the aqueous ammonia solution, the molar ratio of the intermediate to the ammonia water is 1:1.3, adjust the temperature to 50-65°C, stir and react for 2-3 hours, after the reaction is completed, carry out cooling crystallization and filtration , the crystallization temperature is 30-35°C, the filtrate is circulated and crystallized in the cooling crystallizer, the obtained filter cake is ammonium dihydrogen phosphate product, and the component content in the filtrate is detected;

[0073] 2) add pota...

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Abstract

The invention relates to the technical field of chemical industry, and especially relates to a method for preparing ammonium dihydrogen phosphate and preparing a special fertilizer for beet as a byproduct. The temperature and other coefficients of the preparation of ammonium dihydrogen phosphate from phosphoric acid through a wet process are changed, so the purity of the ammonium dihydrogen phosphate product is improved, and the N, P and K compounded fertilizer is produced. The method improves the purity of ammonium dihydrogen phosphate, and the produced special fertilizer for beet has high absorptivity, can meet the nutrition needs of beet in all stages of the growth period of beet, greatly increases the output of beet, and is an 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 ammonium dihydrogen phosphate by-product special fertilizer for sugar beets. Background technique [0002] Beet, (Beta vulgaris), also known as beets, is a biennial herb native to the western and southern coasts of Europe, transplanted from Sweden to Spain, and is a major source of sugar other than tropical sugarcane. The pigment content of beetroot is extremely rich. The main pigment is called Betalains, including red Betacyanins and yellow Betaxanthins. Pigment is a good source of pigment. [0003] At present, the seed fertilizer used for sugar beets in China is basically diammonium phosphate, which is also a seed fertilizer commonly used in agriculture. Its main components are phosphorus pentoxide (P2O5) 46%, nitrogen (N) 18%. Because different crops have different nutrient absorption rules and sensitivities, there are many proble...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B25/28C05G1/00
Inventor 陈肖虎廖吉星高贵龙朱飞武李军旗彭宝林薛涛黄芳金会心李杰瑞
Owner GUIZHOU UNIV
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