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

A technology of ammonium dihydrogen phosphate and a production method, applied in the directions of phosphate, phosphorus oxyacid, application, etc., can solve the problems of slowing down of ginger growth, stoppage, and inability to supply ginger with nutrients, and achieves improved element content, good absorption rate, The effect of reducing planting costs

Inactive Publication Date: 2017-09-15
GUIYANG KAILIN FERTILIZER CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The unabsorbed mixed fertilizer is easy to cause soil compaction. At the same time, the release and loss of the mixed fertilizer is too fast, which will cause the crazy growth of ginger in the early stage. In the later stage, due to the crazy growth of ginger and the soaking of rainwater or the decomposition of fertilizer itself, the nutrients in the soil cannot be supplied to ginger. needs, causing the growth of ginger to slow down or stop
[0008] 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 ginger special fertilizer and the absorption situation of ginger from a large number of prior art documents and many years of exploration and research, and have effectively explored the production of phosphoric acid diphosphate from wet-process phosphoric acid. The special fertilizer for ginger is produced from the filtrate of ammonium hydrogen phosphate, which solves the problems of low purity of ammonium dihydrogen phosphate produced by wet process phosphoric acid and unusable active ingredients in the filtrate. At the same time, the special fertilizer has good absorption rate and controllable release effect. Domestic fertilizer production, no report

Method used

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

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Effect test

Embodiment 1

[0049] A kind of production method of preparing ammonium dihydrogen phosphate by-product ginger special fertilizer provided by the present embodiment mainly comprises the following steps:

[0050] 1) Phosphoric acid and carbonamide are mixed according to the molar ratio of 1.2:1, and the temperature is raised from 80°C to 160°C at a heating rate of 8°C / min. After reaching 160°C, the reaction is stirred for 4 hours, and the intermediate is separated, and 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 65°C, stir and react for 4 hours, after the reaction is completed, perform cooling crystallization and filtration, the crystallization temperature is 35°C, and the filtrate is cooled Circular crystallization treatment in the crystallizer, the obtained filter cake is ammonium dihydrogen phosphate product, and the component content in the filtrate is detected;

[0051] 2) adding c...

Embodiment 2

[0056] A kind of production method of preparing ammonium dihydrogen phosphate by-product ginger special fertilizer provided by the present embodiment mainly comprises the following steps:

[0057] 1) Phosphoric acid and carbonamide are mixed according to the 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. After reaching 160°C, the reaction is stirred for 4 hours, and the intermediate is obtained by separation. 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°C, stir and react for 5h, after the reaction, perform cooling crystallization and filtration, the crystallization temperature is 30°C, and the filtrate is cooled Circular crystallization treatment in the crystallizer, the obtained filter cake is ammonium dihydrogen phosphate product, and the component content in the filtrate is detected;

[0058] 2) in the filtrate, addin...

Embodiment 3

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

[0064] 1) Phosphoric acid and carbonamide are mixed according to the molar ratio of 1.3:1, and the temperature is raised from 80°C to 160°C at a heating rate of 6°C / min. After reaching 160°C, the reaction is stirred for 3.5 hours, and the intermediate is separated. 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 60°C, stir and react for 4.5h, after the reaction, carry out cooling crystallization and filtration treatment, the crystallization temperature is 32°C, make the filtrate The crystallization process is circulated in the cooling crystallizer, and the obtained filter cake is ammonium dihydrogen phosphate product, and the component content in the filtrate is detected;

[0065] 2) addi...

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PUM

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Abstract

The invention relates to the field of chemical technology, in particular to a production method for preparing ammonium dihydrogen phosphate by-product ginger special fertilizer. By changing the temperature and other coefficients of preparing ammonium dihydrogen phosphate by wet-process phosphoric acid, the purity of ammonium dihydrogen phosphate product is improved , at the same time can produce compound fertilizer containing N, P, K compound state, this method can not only improve the purity of ammonium dihydrogen phosphate, the absorption rate of the special fertilizer for ginger produced is good, and the special fertilizer for ginger produced at the same time It can meet the nutritional needs of each period in the growth cycle of ginger, greatly increase the yield of ginger, and is a high-efficiency 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 ginger special fertilizer. Background technique [0002] Ginger, plant of Zingiberaceae Zingiberaceae, also known as "Zingiber officinale"; rhizome with yellow-green flowers and pungent fragrance. Fresh or dried rhizomes can be used as condiments. Ginger is processed as one of the medicinal materials of traditional Chinese medicine. Ginger has the effect of dispelling cold and sweating, so ginger tea can treat colds. It is also one of the commonly used condiments in daily cooking. Ginger, green onion and garlic are called "three major seasonings". [0003] The fertilizer used for planting ginger is generally nitrogen, phosphorus and potassium mixed fertilizer, such as the invention patent of CN10331928A, a kind of special fertilizer for ginger and its preparation method, which includes base f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B25/28C05G1/00
Inventor 廖吉星高贵龙朱飞武薛涛石秀明陈肖虎彭宝林
Owner GUIYANG KAILIN FERTILIZER CO LTD
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