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Method for preparing nutritional fertilizer for wheat

A nutrient fertilizer and wheat technology, applied in the field of preparation of wheat nutrient fertilizer, can solve the problems of polluting the environment, not conforming to the proportion of wheat, and low absorption rate, and achieve significant economic value, significant environmental value, and low phosphorus recovery rate.

Inactive Publication Date: 2015-01-28
GUIZHOU UNIV +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In view of this, the purpose of the present invention is to provide a method for preparing wheat nutrient fertilizer, to solve the problem that the nutrient element collocation in the existing fertilizer does not meet the ratio of wheat's demand for nutrient element, causing the applied fertilizer to the wheat to be absorbed by the wheat The rate is low, and some elemental compounds remain in the soil, changing the structure of the soil and polluting the environment
At the same time, it solves the waste of a large amount of calcium dihydrogen phosphate that will be caused by incomplete crystallization of calcium dihydrogen phosphate in the process of preparing calcium dihydrogen phosphate products, and excessive crystallization of calcium dihydrogen phosphate will bring the A large number of impurities, which in turn makes the technical problem of low purity of calcium dihydrogen phosphate products

Method used

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  • Method for preparing nutritional fertilizer for wheat
  • Method for preparing nutritional fertilizer for wheat
  • Method for preparing nutritional fertilizer for wheat

Examples

Experimental program
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Effect test

Embodiment 1

[0043] A preparation method of wheat nutrient fertilizer, comprising the following steps:

[0044] (1) Preparation of intermediate: first add phosphoric acid to the synthesis tank, then raise the temperature of phosphoric acid to 80°C, then add carbonamide to the synthesis tank to make it react with phosphoric acid, after 190 minutes of reaction, cool down the temperature After crystallization at 20°C, centrifuge to obtain the intermediate, the molar ratio of phosphoric acid to carbonamide is 1.2:1;

[0045] (2) Preparation of calcium dihydrogen phosphate: send the intermediate obtained in step (1) into the synthesis tank, mix and react with calcium hydroxide at a molar ratio of 1:0.6 for 30 minutes, and control the addition speed of calcium hydroxide The reaction temperature is 60°C, and the pH value is adjusted to 8. After the reaction is completed, the obtained slurry is added to the cooling crystallizer for circulation and crystallization, and the filtrate is detected and ...

Embodiment 2

[0048] (1) Preparation of intermediate: first add phosphoric acid to the synthesis tank, then raise the temperature of phosphoric acid to 130°C, then add carbonamide to the synthesis tank to make it react with phosphoric acid, after 160 minutes of reaction, cool down the temperature After crystallization at 40°C, centrifuge to obtain the intermediate, the molar ratio of phosphoric acid to carbonamide is 1.4:1;

[0049] (2) Preparation of calcium dihydrogen phosphate: send the intermediate obtained in step (1) into the synthesis tank, mix and react with calcium hydroxide at a molar ratio of 1:0.8 for 50 minutes, and control the addition speed of calcium hydroxide The reaction temperature is 80°C, and the pH value is adjusted to 9. After the reaction is completed, the obtained slurry is added to the cooling crystallizer to circulate crystallization, and the filtrate is detected and analyzed at the same time. When the nitrogen content in the filtrate is 13%, the phosphorus pentoxi...

Embodiment 3

[0052] (1) Preparation of intermediates: first add phosphoric acid to the synthesis tank, then raise the temperature of phosphoric acid to 100°C, then add carbonamide to the synthesis tank to make it react with phosphoric acid, after 175 minutes of reaction, cool down the temperature After crystallization at 30°C, centrifuge to obtain the intermediate, the molar ratio of phosphoric acid to carbonamide is 1.3:1;

[0053] (2) Preparation of calcium dihydrogen phosphate: send the intermediate obtained in step (1) into the synthesis tank, mix and react with calcium hydroxide at a molar ratio of 1:0.7 for 40 minutes, and control the addition speed of calcium hydroxide The reaction temperature is 70°C, and the pH value is adjusted to 8.5. After the reaction is completed, the obtained slurry is added to a cooling crystallizer to circulate crystallization, and the filtrate is detected and analyzed at the same time. When the nitrogen content in the filtrate is 12%, the phosphorus pentox...

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Abstract

The invention relates to the technical field of chemical industry, and discloses a method for preparing a nutritional fertilizer for wheat. The nutritional fertilizer for wheat is prepared according to nutritional element proportions required by the growth of wheat, obtained by analyzing the nutritional components absorbed in the growth process of wheat, so the utilization of the fertilizer is improved, the fertilization cost is reduced, the output of wheat in unit area is improved, the production cost of the nutritional fertilizer for wheat is low, and the preparation method has the advantages of simplicity, no discharge of pollutants, and environmental protection.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a method for preparing wheat nutrient fertilizer. Background technique [0002] Wheat is the general designation of wheat plants, is a kind of gramineous plant widely planted all over the world. The caryopsis of wheat is one of the staple foods of human beings. After being ground into flour, it can be used to make bread, steamed buns, biscuits, noodles and other foods; after fermentation, it can be made into beer, alcohol, vodka, or biofuel. Wheat is rich in starch, protein, fat, minerals, calcium, iron, thiamine, riboflavin, niacin, vitamin A and vitamin C, etc. Wheat seeds contain 53-70% starch, about 11% protein, 2-7% sugar, 2-10% dextrin, about 1.6% fat, and about 2% crude fiber. Fatty oils are mainly glycerides of oleic acid, linoleic acid, palmitic acid, and stearic acid. It still contains a small amount of sitosterol, lecithin, allantoin, arginine, amylase, ma...

Claims

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Application Information

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IPC IPC(8): C05G1/00C01B25/32
CPCC05B17/00C05D1/00C05D9/02
Inventor 陈肖虎廖吉星高贵龙苏涛李军旗朱德军薛涛吴俊良黄芳金会心
Owner GUIZHOU UNIV
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