Production method for preparing ammonium dihydrogen phosphate and byproduct special fertilizer for radix scutellariae

Abstract

The invention relates to the technical field of chemical engineering, and particularly relates to a production method for preparing ammonium dihydrogen phosphate and a byproduct special fertilizer for radix scutellariae. Through analysis on requirements on nutritional elements in the radix scutellariae growth process, analysis and realization of fertilization conditions of traditional radix scutellariae planting, research and discussion of the absorption conditions of crops on nitrogen, phosphorus and potassium, and analysis by combining with the defects in the preparation process of an ammonium dihydrogen phosphate product, the production process of the special fertilizer for the radix scutellariae is combined with the preparation process of the ammonium dihydrogen phosphate product, so that the preparation process of the ammonium dihydrogen phosphate product and the preparation process of the special fertilizer for the radix scutellariae are complementary; production of the special fertilizer for the radix scutellariae is carried out by using liquid waste generated in the preparation process of the ammonium dihydrogen phosphate product; the added value of the product in the preparation process of the ammonium dihydrogen phosphate product is increased; the discharge of the liquid waste is lowered; and meanwhile, deep crystallization of the ammonium dihydrogen phosphate product in the ammonium dihydrogen phosphate process is unnecessary, thus waste of nitrogen and phosphorus resources can also be avoided.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a production method for preparing ammonium dihydrogen phosphate by-product Huangling special fertilizer. Background technique [0002] Huangling, aliases: Tiaoling, Ziling, Kuling, Kuiling, Camellia root, perennial herb. Born on dry sunny hillsides, it can cure plague fever, lung heat cough, damp-heat jaundice, diarrhea, restless fetus, etc. It also has antibacterial, antipyretic, and antihypertensive effects. Usually, in the planting and cultivation technology of Huangling, a large amount of miscellaneous fertilizers are used to mix, and phosphorus fertilizer is used as the base fertilizer, so as to provide technical means for the cultivation of Huangling. When Huang Ling is planted with base fertilizer, due to the absorption defect of the crop itself (the absorption rate of nitrogen fertilizer is about 20-46%, the absorption rate of phosphorus fertilizer is about 10-...

AI Technical Summary

Problems solved by technology

Usually, in the planting and cultivation technology of Huangling, a large amount of miscellaneous fertilizers are used to mix, and phosphorus fertilizer is used as the base fertilizer, so as to provide technical means for the cultivation of Huangling. When Huang Ling is planted with base fertilizer, due to the absorption defect of the crop itself (the absorption rate of nitrogen fertilizer is about 20-46%, the absorption rate of phosphorus fertilizer is about 10-25%, and the absorption rate of potassium fertilizer is about 46-60%), so that a large amount of nitrogen Phosphorus and potassium elements remain in the soil, resulting in an increase in fertilization costs. At the same time, such residues for a long time will cause changes in the soil structure, thereby polluting the environment, increasing the input of fertilizer nutrients, and reducing the yield and quality of Huangling.

[0003] At the same time, the preparation process of ammonium dihydrogen phosphate products is usually produced by wet-process phosphoric acid and hot-process phosphoric acid, but no matter whether it is produced by hot-process phosphoric acid or wet-process phosphoric acid The purity of the ammonium product is affected, so that the purity of the ammonium dihydrogen phosphate product is relatively poor, and it is difficult to meet the industrial needs. Purification of urea phosphate; for this reason, some researchers adopted the method of intermediate replacement, reacting phosphoric acid with urea to prepare the intermediate of urea phosphate, but the reaction was completed below 80°C, and then crystallized by cooling to precipitate phosphoric acid diphosphate ammonium hydrogen phosphate products, and then improve the purity of ammonium dihydrogen phosphate products; however, this process step often requires deep crystallization of ammonium dihydrogen phosphate, thereby minimizing the waste of nitrogen and phosphorus elements in the solution, thereby reducing the concentration of dihydrogen phosphate The cost of ammonium product preparation can also avoid a large amount of waste liquid discharge to cause certain pollution to the environment; and in the process of deep crystallization, it is often accompanied by the production of other products, mixed with ammonium dihydrogen phosphate crystallization, and then affects again Guaranteed the purity of ammonium dihydrogen phosphate product

Images