Production method of urea sulfuric acid multi-nutrient functional compound fertilizer

A production method and technology of urea-sulfuric acid are applied in fertilization devices, fertilizer mixtures, agricultural gas emission reduction, etc., and can solve problems such as insufficient medium and micronutrient elements.

Active Publication Date: 2013-06-05
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these fertilizers also have the following technical defects, such as not containing slow-release nitrogen or the content of slow-release nitrogen is not enough to meet the requirements of one-time fertilization, insu

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] Embodiment 1: the production of urea sulfuric acid multi-nutrient functional compound fertilizer

[0090] The implementation steps of this embodiment are as follows:

[0091] A, preparation of urea-formaldehyde condensate solution

[0092] Mix urea and 12% by weight formaldehyde solution according to the molar ratio of urea to formaldehyde of 1.2, then carry out condensation reaction at a temperature of 90° C. for 5 hours to obtain a solution containing urea-formaldehyde condensate; then

[0093] B. Preparation of urea-sulfuric acid solution

[0094] Add 0.1% zeolite powder antiknock agent based on the weight of the solution to the solution containing urea-formaldehyde condensate prepared in step A, mix evenly, and then add a concentration of 50 wt. % sulfuric acid solution, then reacted for 120 minutes at a temperature of 40° C. to obtain a urea-sulfuric acid solution containing 15% by weight of urea-formaldehyde condensate;

[0095] C, preparation of uranphos slurry ...

Embodiment 2

[0102] Embodiment 2: the production of urea sulfuric acid multi-nutrient functional compound fertilizer

[0103] The implementation steps of this embodiment are as follows:

[0104] A, preparation of urea-formaldehyde condensate solution

[0105] Mix urea and 20% by weight formaldehyde solution according to the molar ratio of urea to formaldehyde of 2.0:1, and then carry out condensation reaction at a temperature of 60°C for 1.5 hours to obtain a solution containing urea-formaldehyde condensate; then

[0106] B. Preparation of urea-sulfuric acid solution

[0107] Add 10% sepiolite antiknock agent based on the weight of the solution to the solution containing urea-formaldehyde condensate prepared in step A, mix evenly, and then add a concentration of 98% to the solution according to the weight ratio of urea to sulfuric acid 2.4:1 % by weight sulfuric acid solution, then reacted at a temperature of 105° C. for 10 minutes to obtain a urea-sulfuric acid solution containing 43% b...

Embodiment 3

[0113] Embodiment 3: the production of urea sulfuric acid multi-nutrient functional compound fertilizer

[0114] The implementation steps of this embodiment are as follows:

[0115] A, preparation of urea-formaldehyde condensate solution

[0116] Mix urea and 37% by weight formaldehyde solution according to the molar ratio of urea to formaldehyde of 1.5:1, and then perform condensation reaction at a temperature of 25° C. for 3 hours to obtain a solution containing urea-formaldehyde condensate; then

[0117] B. Preparation of urea-sulfuric acid solution

[0118] Add 8% attapulgite powder antiknock agent based on the weight of the solution to the solution containing urea-formaldehyde condensate prepared in step A, mix evenly, and then add concentration 58% by weight of sulfuric acid solution, followed by reaction at a temperature of 52° C. for 90 minutes to obtain a urea-sulfuric acid solution containing 31% by weight of urea-formaldehyde condensate;

[0119] C, preparation o...

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Abstract

The invention relates to a production method of a urea sulfuric acid multi-nutrient functional compound fertilizer. The method comprises the following steps of: preparing a urea-formaldehyde condensate solution, preparing a urea sulfuric acid solution, preparing urea-sulfur-phosphorus slurry, preparing a granular fertilizer and the like. According to the production method disclosed by the invention, medium and low-grade phosphorus ore is taken as a main phosphorous source for producing the compound fertilizer so as to be conductive to sustainable utilization and protection of phosphorous sources in China; urea-formaldehyde is used for providing part of slow-action nitrogen, and a calcium-magnesium-phosphorous fertilizer and the like are used for providing long-action phosphorous and potassium so as to improve the utilization rate of nutrients in the fertilizer, simultaneously provide various trace nutritional elements and improve the anti-lodging and anti-disease ability of crops; and a surfactant and the like are added so as to be capable of improving reaction status and giving fertilizer weeding, soil improvement and other functions to the fertilizer. When the same yield of the crops is achieved, compared with the existing fertilizer, the total nutrients in the fertilizer disclosed by the invention can be reduced by above 5%, the fertilizer is saved, the synergy is realized, the production cost is reduced by above 10% in comparison with the ordinary compound fertilizer, and the cost is reduced by above 20% in comparison with the existing slow-release fertilizer.

Description

【Technical field】 [0001] The invention relates to the technical field of agricultural fertilizers. More specifically, the present invention relates to a production method of urea-sulfuric acid multi-nutrient functional compound fertilizer. 【Background technique】 [0002] Functional compound fertilizer refers to the general term of compound (mixed) fertilizers with special functions. It refers to fertilizers suitable for a certain (or a certain type) of specific crops in a certain area or fertilizers that contain certain substances and have specific effects. Functional compound fertilizer is a kind of fertilizer that provides crops with two or more nutrient elements in nitrogen, phosphorus, and potassium, and also has other functions, such as weeding, promoting crop growth and development, drought resistance, pest and disease resistance, and Fertilizers for lodging, correcting soil acidity, improving gaseous oxygen content in subsoil, etc. Functional compound fertilizers ha...

Claims

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Application Information

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IPC IPC(8): C05G3/00
CPCY02P60/21
Inventor 侯翠红许秀成王好斌张保林苗俊艳李菂萍
Owner ZHENGZHOU UNIV
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