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

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...

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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

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