Production method of preparing tricalcium phosphate and byproduct special fertilizer for mangos

A technology of tricalcium phosphate and production method, applied in chemical instruments and methods, applications, phosphorus compounds, etc., can solve problems affecting the quality of tricalcium phosphate products, influence on the purity of tricalcium phosphate products, environmental pollution, etc., and achieve significant environmental protection value. and economic benefits, make up for the cost of impurity removal, and reduce production costs

Inactive Publication Date: 2015-01-21
GUIZHOU KAILIN GRP CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the preparation process of tricalcium phosphate products, it is usually produced by crystallization and precipitation. This process often requires deep crystallization of tricalcium phosphate, thereby reducing the waste of elemental resources such as nitrogen, phosphorus, and calcium, and improving phosphoric acid production. The output of tricalcium phosphate reduces the production cost; but this deep crystallization will affect the purity of tricalcium phosphate products, and then affect the quality of tricalcium phosphate products; and the amount of waste liquid after crystallization treatment is large, which will also cause environmental pollution

Method used

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  • Production method of preparing tricalcium phosphate and byproduct special fertilizer for mangos
  • Production method of preparing tricalcium phosphate and byproduct special fertilizer for mangos
  • Production method of preparing tricalcium phosphate and byproduct special fertilizer for mangos

Examples

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Effect test

Embodiment 1

[0046] A kind of production method of preparing tricalcium phosphate by-product mango special fertilizer, comprises the following steps:

[0047] (1) Intermediate slurry preparation: use phosphoric acid and carbonamide to react in a stirred reactor at a temperature of 105°C, and control the molar ratio of phosphoric acid and carbonamide to 1.9:1, and stir at a stirring speed of 50r / min After reacting for 50min, the intermediate slurry was obtained;

[0048] (2) Synthesis of tricalcium phosphate slurry: add calcium hydroxide solution with 1.3 times the molar weight of carbonamide to the intermediate slurry, and control the reaction temperature to 80°C. When the reaction reaches 50min, detect the pH value, and wait for When the pH value is 8, the reaction is terminated, and it is transferred to a cooling crystallizer, and the temperature is lowered to 40°C, so that tricalcium phosphate crystals are precipitated, and the content of nitrogen, phosphorus, and calcium in the crystal...

Embodiment 2

[0055] A kind of production method of preparing tricalcium phosphate by-product mango special fertilizer, comprises the following steps:

[0056] (1) Preparation of intermediate slurry: react phosphoric acid and carbonamide in a stirred reactor at a temperature of 115°C, and control the molar ratio of phosphoric acid and carbonamide to 2.1:1, stirring at a stirring speed of 50r / min After reacting for 50min, the intermediate slurry was obtained;

[0057] (2) Synthesis of tricalcium phosphate slurry: add calcium hydroxide solution with 1.5 times the molar weight of carbonamide to the intermediate slurry, and control the reaction temperature to 80°C. When the reaction reaches 50min, detect the pH value, and wait for When the pH value is 9, the reaction is terminated, and it is transferred to a cooling crystallizer, and the temperature is lowered to 38°C, so that tricalcium phosphate crystals are precipitated, and the content of nitrogen, phosphorus, and calcium in the crystalliza...

Embodiment 3

[0064] A kind of production method of preparing tricalcium phosphate by-product mango special fertilizer, comprises the following steps:

[0065] (1) Intermediate slurry preparation: use phosphoric acid and carbonamide to react in a stirred reactor at a temperature of 110°C, and control the molar ratio of phosphoric acid and carbonamide to 2:1, and stir at a stirring speed of 50r / min After reacting for 50min, the intermediate slurry was obtained;

[0066] (2) Synthesis of tricalcium phosphate slurry: add calcium hydroxide solution with 1.4 times the molar weight of carbonamide to the intermediate slurry, and control the reaction temperature to 80°C. When the reaction reaches 50min, detect the pH value, and wait for When the pH value is 8.5, the reaction is terminated, and it is transferred to a cooling crystallizer, and the temperature is lowered to 35°C, so that tricalcium phosphate crystals are precipitated, and the content of nitrogen, phosphorus, and calcium in the crystal...

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Abstract

The invention relates to the technical field of chemical engineering and particularly relates to a production method of preparing tricalcium phosphate and a byproduct special fertilizer for mangos. In a preparation process of a tricalcium phosphate product, phosphoric acid reacts with urea and the temperature during the reaction is controlled, so that the produced urea phosphate generates structure transformation reaction, and thus, urea phosphate in an ion form is generated; on the condition that the phosphoric acid is excessive, the phosphoric acid reacts with positive ions to generate an intermediate plasma with a complexing effect and dihydrogen phosphate ion; then calcium ions are added to react with the intermediate plasma and the dihydrogen phosphate ion to produce tricalcium phosphate; and according to the requirements of mangos on nitrogen-phosphor-potassium elements, the content of residual nitrogen and phosphor in liquid in the production process of tricalcium phosphate is controlled; and by virtue of adding the potassium element, the proportion of the nitrogen to phosphor to potassium is regulated to meet the growth needs of the mangos; and further the purity of the tricalcium phosphate product is improved, the emission load of the waste liquor is lowered, and the production cost is lowered.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a production method for preparing a special mango fertilizer by-product of tricalcium phosphate. Background technique [0002] Mango has good color, fragrance and taste, and is known as the king of fruit. The fruit is rich in nutrition, with a sugar content of 12% to 20%, protein 5.56%, fat 16.1%, carbohydrate 67.29%, and rich vitamin A, vitamin B, vitamin C, also contains a small amount of calcium, phosphorus, iron and other minerals. In the traditional mango planting technology, mango fertilization is divided into sapling fertilization and fruit tree fertilization, and sapling fertilization is divided into fixed value fertilizer and top dressing. Mangoes are fertilized with nitrogen, phosphorus and potassium fertilizers at each stage. And then meet the demand of mango for nutrients. Mango fertilization is usually mixed with nitrogen fertilizer, phosphorus fertilizer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/32C05G1/00
Inventor 廖吉星陈肖虎魏发展高贵龙石秀明薛涛朱飞武
Owner GUIZHOU KAILIN GRP CO LTD
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