A kind of method for preparing potassium dihydrogen phosphate co-production special fertilizer for Phyllostachys pubescens

A technology of potassium dihydrogen phosphate and special fertilizers, applied in chemical instruments and methods, applications, phosphorus compounds, etc., can solve the waste of potassium dihydrogen phosphate, low purity of potassium dihydrogen phosphate, and a large amount of impurities brought into potassium dihydrogen phosphate products and other issues, to achieve the effects of reduced production costs, significant economic benefits, significant environmental protection value and economic benefits

Inactive Publication Date: 2016-09-28
GUIZHOU UNIV +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of this, the present invention provides a method for preparing potassium dihydrogen phosphate and co-producing special fertilizer for moso bamboo, so as to solve the large amount of phosphoric acid caused by incomplete crystallization of potassium dihydrogen phosphate in the process of preparing potassium dihydrogen phosphate products. The waste of potassium dihydrogen phosphate, excessive crystallization of potassium dihydrogen phosphate will bring a lot of impurities into the product of potassium dihydrogen phosphate, and then make the technical problem of low purity of potassium dihydrogen phosphate product

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  • A kind of method for preparing potassium dihydrogen phosphate co-production special fertilizer for Phyllostachys pubescens
  • A kind of method for preparing potassium dihydrogen phosphate co-production special fertilizer for Phyllostachys pubescens
  • A kind of method for preparing potassium dihydrogen phosphate co-production special fertilizer for Phyllostachys pubescens

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Embodiment 1

[0041] A method for preparing potassium dihydrogen phosphate and co-producing special fertilizer for moso bamboo, using phosphoric acid and carbonamide in a molar ratio of 1.1:1 and mixing them in a reaction kettle, and then raising the temperature of the two mixtures at a heating rate of 5°C / min to 100°C, stirred and reacted for 120min, then cooled to 30°C at a speed of 3°C / min, and then centrifuged to obtain the intermediate of urea phosphate; the intermediate and basic potassium salt were added to the Mix the reaction in the reaction kettle, adjust the pH value of the reaction to 10, and stir the reaction at a stirring speed of 200r / min for 60min. After the reaction is completed, obtain a slurry containing nitrogen, phosphorus and potassium, and place the slurry in a cooling crystallizer for circulation crystallization treatment, while detecting and analyzing the filtrate, when the molar ratio of nitrogen, phosphorus and potassium in the filtrate is 9:1:5.5, stop crystalliza...

Embodiment 2

[0044] A method for preparing potassium dihydrogen phosphate and co-producing special fertilizer for moso bamboo, using phosphoric acid and carbonamide at a molar ratio of 1.3:1 and mixing them in a reactor, and then raising the temperature of the two mixtures at a heating rate of 5°C / min to 120°C, stirred and reacted for 100min, then cooled to 45°C at a speed of 3°C / min, and then centrifuged to obtain the intermediate of urea phosphate; the intermediate and basic potassium salt were added to the Mix the reaction in the reaction kettle, adjust the pH value of the reaction to 12, and stir the reaction for 40 minutes at a stirring speed of 250r / min. After the reaction is completed, obtain a slurry containing nitrogen, phosphorus and potassium, and place the slurry in a cooling crystallizer for circulation crystallization treatment , while detecting and analyzing the filtrate, when the molar ratio of nitrogen, phosphorus and potassium in the filtrate is 11:1:6.5, stop crystallizat...

Embodiment 3

[0047] A method for preparing potassium dihydrogen phosphate and co-producing special fertilizer for moso bamboo, using phosphoric acid and carbonamide in a molar ratio of 1.2:1 and mixing them in a reaction kettle, and then raising the temperature of the two mixtures at a heating rate of 5°C / min to 110°C, stirred and reacted for 110min, then cooled to 40°C at a speed of 3°C / min, and then centrifuged to obtain the intermediate of urea phosphate; the intermediate and basic potassium salt were added to the Mixed reaction in the reaction kettle, adjust the pH value of the reaction to be 10, and the stirring speed is 220r / min stirring reaction for 50min. After the reaction is completed, obtain a slurry containing nitrogen, phosphorus and potassium, and place the slurry in a cooling crystallizer for circulation crystallization treatment. Simultaneously detect and analyze the filtrate, when the molar ratio of nitrogen, phosphorus and potassium in the filtrate is 10:1:6, stop crystall...

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Abstract

The invention relates to the technical field of chemical industry, and discloses a method for simultaneously preparing potassium dihydrogen phosphate and a special fertilizer for Phyllostachys edulis. 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 Phyllostachys edulis. The method improves the purity of potassium dihydrogen phosphate, the special fertilizer for Phyllostachys edulis, prepared by analyzing the ratio of nutrients required by the growth process of Phyllostachys edulis, improves the output of Phyllostachys edulis, and no waste liquid is discharged in the production process of the fertilizer, so the environment is not polluted.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a method for preparing potassium dihydrogen phosphate and co-producing special fertilizer for moso bamboo. Background technique [0002] Potassium dihydrogen phosphate can be used in industry, agriculture and other fields, and has a wide range of uses. For example, in the industry, it is mainly used as the production of chemical raw materials, and in agriculture, it is mainly used for the addition of feed and chemical fertilizers. In addition, potassium dihydrogen phosphate can also be used as a raw material for food to improve the taste and quality of food, and to supplement the human body. Potassium and other medium and trace elements. At present, the production methods of potassium dihydrogen phosphate mainly include neutralization method, extraction method, ion exchange method, double decomposition method, crystallization method and electrolysis method, etc. The ne...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B25/30C05G1/00
Inventor 陈肖虎廖吉星李军旗蔺忠建何敏周勇赵伟毅石磊曾舒金会心
Owner GUIZHOU UNIV
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