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A method for preparing special compound fertilizer for cucumber by-product of ammonium dihydrogen phosphate

A technology of ammonium dihydrogen phosphate and compound fertilizer, applied in the directions of phosphate, phosphorus oxyacid, application, etc., can solve the problems of difficulty in handling mother liquor, waste of resources, difficulty in recycling, etc., to avoid pollution, high value and high purity. Effect

Inactive Publication Date: 2017-02-08
GUIZHOU UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Ammonium dihydrogen phosphate is a relatively common compound fertilizer. Ammonium dihydrogen phosphate products are widely used in various types of economic crops, grain, fruits, vegetables, etc. Ammonium dihydrogen phosphate can significantly increase production and income, improve quality and improve lodging resistance. , resistance to diseases and insect pests, prevention of premature aging and many other excellent functions, and has the effect of overcoming the nutritional deficiency caused by the decline of root aging absorption capacity in the later stage of crop growth. At present, the preparation reaction of ammonium dihydrogen phosphate is easy to operate, but it is difficult to handle the mother liquor after the reaction. Recycling Difficulties, resulting in waste of resources and other issues

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  • A method for preparing special compound fertilizer for cucumber by-product of ammonium dihydrogen phosphate

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Effect test

Embodiment 1

[0030] A method for preparing ammonium dihydrogen phosphate by-product special compound fertilizer for cucumber, the method comprising the following steps:

[0031] (1) Preparation of ammonium dihydrogen phosphate: use urea and phosphoric acid to mix and react in a molar ratio of 1:1.2. After fully stirring, adjust the pH value to 3.4. After reacting for 105 minutes, heat it to 102°C with ammonia water in a ratio of 18:13. Reaction, place the reacted mixed slurry in a cooling crystallizer to cool to 22°C, make the slurry circulate crystallization treatment in the cooling crystallizer, and detect and analyze the slurry, when the nitrogen content is 15.2%, and the phosphorus content is 7.3%. , stop crystallization and filter, and the obtained filter cake is the finished product of ammonium dihydrogen phosphate;

[0032] (2) Prepare special compound fertilizer for cucumbers: add potassium, magnesium, calcium, and boron elements required for cucumbers to the filtrate obtained afte...

Embodiment 2

[0034] A method for preparing ammonium dihydrogen phosphate by-product special compound fertilizer for cucumber, the method comprising the following steps:

[0035] (1) Preparation of ammonium dihydrogen phosphate: use urea and phosphoric acid to mix and react in a molar ratio of 1:1.3. After fully stirring, adjust the pH value to 3.4. After reacting for 107 minutes, heat it to 104°C with ammonia water in a ratio of 18:13. Reaction, the mixed slurry after the reaction is placed in a cooling crystallizer and cooled to 22°C, the slurry is circulated and crystallized in the cooling crystallizer, and the slurry is detected and analyzed. When the nitrogen content is 15.3%, and the phosphorus content is 7.3%. , stop crystallization and filter, and the obtained filter cake is the finished product of ammonium dihydrogen phosphate;

[0036] (2) Prepare special compound fertilizer for cucumbers: add potassium, magnesium, calcium, and boron elements required for cucumbers to the filtrate...

Embodiment 3

[0038] A method for preparing ammonium dihydrogen phosphate by-product special compound fertilizer for cucumber, the method comprising the following steps:

[0039](1) Preparation of ammonium dihydrogen phosphate: use urea and phosphoric acid to mix and react in a molar ratio of 1:1.2. After fully stirring, adjust the pH value to 3.5. After reacting for 110 minutes, heat it with ammonia water at a ratio of 18:13 to 104°C. Reaction, place the reacted mixed slurry in a cooling crystallizer to cool to 22°C, make the slurry circulate crystallization treatment in the cooling crystallizer, and detect and analyze the slurry, when the nitrogen content is 15.2%, and the phosphorus content is 7.5%. , stop crystallization and filter, and the obtained filter cake is the finished product of ammonium dihydrogen phosphate;

[0040] (2) Prepare special compound fertilizer for cucumbers: add potassium, magnesium, calcium, and boron elements required for cucumbers to the filtrate obtained after...

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Abstract

The invention discloses a method for preparing ammonium dihydrogen phosphate and preparing a special composite fertilizer for cucumber as a byproduct. The method comprises the steps of preparing ammonium dihydrogen phosphate and preparing the special composite fertilizer for cucumber. The special composite fertilizer for cucumber is prepared through subsequent processing adjustment of a mother liquor generated in the preparation process of ammonium dihydrogen phosphate.

Description

technical field [0001] The invention relates to the technical field of chemical fertilizers, in particular to a method for preparing ammonium dihydrogen phosphate by-product special compound fertilizer for cucumbers. Background technique [0002] Cucumber, also known as courgette, green cucumber, is a plant of the genus Cucurbitaceae Melon. It was brought back to the Central Plains by Zhang Qian on his mission to the Western Regions during the Western Han Dynasty. It is called cucumber. Cucumbers like warmth and are not cold-tolerant, so cucumbers are widely distributed throughout China and are one of the main greenhouse products. The stem is covered with hairs, rich in sap, and the appearance of the leaves has 3-5 lobes, covered with downy. The edible part of cucumber is the tender ovary. Fruit color is oily green or emerald green. Cucumber can also be used as medicine. Cucumber is also called Qinggua in southern China, such as cucumber scrambled eggs. So when you see...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B25/28C05G1/00
Inventor 陈肖虎廖吉星唐晓宁朱飞武王帅帅徐圆李名新赵井腥李杰瑞熊陈杰
Owner GUIZHOU UNIV