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

A technology of ammonium dihydrogen phosphate and compound fertilizer, which is applied in the direction of phosphate, phosphorus oxyacid, application, etc., can solve the problems of large soil environmental pollution, high element loss, and high cost, so as to reduce costs, avoid soil pollution problems, The effect of reducing waste

Inactive Publication Date: 2017-01-04
GUIZHOU UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary fertilizers have problems such as high element loss, large soil environmental pollution, and high cost. Therefore, the specificity of compound fertilizers is of great significance for different crops.
[0003] At present, there is also a preparation technology for compound fertilizers for crops, but no technical solutions for compound fertilizers in a compound state that match elements according to the research on the elements required by crops for different crop varieties have not been found in relevant patent documents and open literature It exists, and no technical scheme has been found to produce special compound fertilizer for blueberries in the process of preparing ammonium dihydrogen phosphate

Method used

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

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Experimental program
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Effect test

Embodiment 1

[0034] a. Raw material preparation: first mix phosphoric acid and urea in a molar ratio of 1.8:1.1, the phosphoric acid concentration is 68%, rise to 84°C at a heating rate of 4°C / min, stir for 30min, and prepare slurry, separate Obtain urea phosphate, the reaction of phosphoric acid and urea is the reaction of phosphoric acid solution and urea solid;

[0035] b. Preparation of ammonium dihydrogen phosphate: Slowly add ammonia water to the slurry containing urea phosphate to control the pH value to 3.3 and fully stir to obtain a slurry containing nitrogen and phosphorus. The slurry is cooled to 25°C in a cooling crystallizer, filtered, Separation obtains ammonium dihydrogen phosphate;

[0036] c, filtrate element addition: in the separated filtrate, add potassium element and trace element compound required by blueberry to obtain the mother liquor of blueberry special compound fertilizer, trace element compound is calcium, magnesium chelate, in the mother liquor of blueberry sp...

Embodiment 2

[0039] a. Raw material preparation: first mix phosphoric acid and urea in a molar ratio of 1.8:1.1, the concentration of phosphoric acid is 69%, rise to 88°C at a heating rate of 4°C / min, stir and react for 30min, and prepare slurry, separate Obtain urea phosphate, the reaction of phosphoric acid and urea is the reaction of phosphoric acid solution and urea solid;

[0040] b. Preparation of ammonium dihydrogen phosphate: Slowly add ammonia water to the slurry containing urea phosphate to control the pH value to 3.4 and fully stir to obtain a slurry containing nitrogen and phosphorus. The slurry is cooled to 25°C in a cooling crystallizer, filtered, Separation obtains ammonium dihydrogen phosphate;

[0041] c, filtrate element addition: in the separated filtrate, add potassium element and trace element compound required by blueberry to obtain the mother liquor of blueberry special compound fertilizer, trace element compound is calcium, magnesium chelate, in the mother liquor of...

Embodiment 3

[0044]a. Raw material preparation: first mix phosphoric acid and urea in a molar ratio of 1.8:1.2, the concentration of phosphoric acid is 70%, rise to 84°C at a heating rate of 4°C / min, stir for 30min, and prepare a slurry, separate Obtain urea phosphate, the reaction of phosphoric acid and urea is the reaction of phosphoric acid solution and urea solid;

[0045] b. Preparation of ammonium dihydrogen phosphate: Slowly add ammonia water to the slurry containing urea phosphate to control the pH value to 3.4 and fully stir to obtain a slurry containing nitrogen and phosphorus. The slurry is cooled to 25°C in a cooling crystallizer, filtered, Separation obtains ammonium dihydrogen phosphate;

[0046] c, filtrate element addition: in the separated filtrate, add potassium element and trace element compound required by blueberry to obtain the mother liquor of blueberry special compound fertilizer, trace element compound is calcium, magnesium chelate, in the mother liquor of blueberr...

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Abstract

The invention discloses a method for preparing ammonium dihydrogen phosphate by-product special compound fertilizer for blueberries. The method comprises the following steps: raw material preparation, preparation of ammonium dihydrogen phosphate, addition of filtrate elements, and drying. Prepare high-purity ammonium dihydrogen phosphate through the reaction of phosphoric acid, urea and ammonia water, and at the same time process and adjust the mother liquor produced by the reaction to prepare compound fertilizer suitable for blueberry growth, which reduces the waste of resources and has certain environmental protection value and economy value.

Description

technical field [0001] The invention relates to the technical field of fertilizers, in particular to a method for preparing ammonium dihydrogen phosphate by-product special compound fertilizer for blueberries. Background technique [0002] Blueberries are shrubs with significant differences in tree size and shape. The height of the tree is from 5m to 0.3m. It grows in clusters for many years, with evergreen and deciduous leaves. The single leaves are alternate, and the leaves are entire or serrated. The corolla is often altar-shaped or bell-shaped. The petals are united at the base, with 4 or 5 lobes on the outer edge, white or pink, with 8 to 10 stamens, shorter than the style, pollinated by insects or wind, and the inflorescences are mostly racemes. The fruit of most varieties is blue-black when ripe, and some varieties are red; the fruit is spherical, oval, oblate or pear-shaped, and the average single fruit weight is about 0.5-2.5g. The pulp is soft and juicy. The se...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B25/28C05G1/00
Inventor 陈肖虎郑培俊高贵龙廖吉星薛涛熊刚曾舒廖川黄芳赵平原
Owner GUIZHOU UNIV