Urea sulfate and preparation method thereof

A technology of urea sulfate and sulfuric acid solution, applied in the preparation of urea derivatives, chemical instruments and methods, preparation of organic compounds, etc., can solve the problems of health impact, complex production process, impact on production output, etc., and achieve outstanding energy saving and cost saving. , The effect of a wide range of raw materials and mild processing conditions

Inactive Publication Date: 2012-02-22
熊建超
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Usually, the production process of mixing urea and sulfuric acid to prepare urea sulfate is complicated, and the produced urea sulfate particles are attached to the equipment, which affects the production output, and the produced urea sulfate particles are unstable
Moreover, when using traditional fertilizers for fertilization, it is usually the fertilization mode of "increasing the quantity and reducing the efficiency, increasing the output and increasing the pollution". Pollution not only affects the health of people today, but also brings immeasurable harm to our future generations

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  • Urea sulfate and preparation method thereof
  • Urea sulfate and preparation method thereof
  • Urea sulfate and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Such as figure 1 As shown, the preparation steps of urea sulfate of the present invention are as follows:

[0031] (1) A urea solution with a concentration of 46% is prepared through a melting tank at a melting temperature of 117.7°C. In order to ensure the preparation effect, during the preparation process of the urea solution, steam with a temperature of 150° C. and a pressure of 0.5 Mpa needs to be introduced for heating. The steam is preferably prepared in a boiler using anthracite as fuel.

[0032] At the same time, a sulfuric acid solution with a concentration of 98% is prepared through a preheating tank at a preheating temperature of 95°C.

[0033] Among them, the preheating temperature of the sulfuric acid solution is set to 95°C in order to achieve the crystallization effect when mixed with the heated urea solution, thereby obtaining a better granulation effect. The setting of water vapor is to promote the combination of urea solution and sulfuric acid solution, ma...

Embodiment 2

[0042] Compared with Example 1, the preparation process of urea sulfate in this example is the same. The difference lies in the temperature during the reaction and the mass ratio of the urea solution to the sulfuric acid solution. The mass ratio of the urea solution to the sulfuric acid solution used in this example is 3.19:1, the urea melting temperature is 91.5°C, and the preheating temperature of sulfuric acid is 75°C, so the prepared urea sulfate product is a white glossy transparent prism The mass ratio of nitrogen and sulfur is 3:1.

[0043] At this time, the pH value of the 0.1mol / L solution of the entire urea sulfate product is 7.2, the mass fraction of nitrogen ≥ 30%, the mass fraction of sulfur ≥ 10%, the mass fraction of free acid ≤ 0.05%, and the mass fraction of biuret The fraction is less than or equal to 1.5%, the mass fraction of water is less than or equal to 1%, the mass fraction of a single element of a middle element is greater than or equal to 2%, and the mas...

Embodiment 3

[0045] Compared with Example 1, the preparation process of urea sulfate in this example is the same. The difference lies in the temperature during the reaction and the mass ratio of the urea solution to the sulfuric acid solution. The mass ratio of the urea solution to the sulfuric acid solution used in this example is 2:1, the urea melting temperature is 78°C, and the preheating temperature of sulfuric acid is 65°C, so the prepared urea sulfate product is slightly yellow, shiny and transparent. Oblique prismatic crystals have a mass ratio of nitrogen and sulfur of 1:1.

[0046] At this time, the pH value of the 0.1 mol / L solution of the entire urea sulfate product is 6.5, the mass fraction of nitrogen is ≥ 21.5%, and the mass fraction of sulfur is ≥ 21.5%. , The mass fraction of free acid ≤ 0.2%, the mass fraction of biuret ≤ 1.5%, the mass fraction of water ≤ 1%, the mass fraction of a single element of middle element ≥ 2%, the mass fraction of a single component of trace eleme...

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Abstract

The invention relates to a fertilizer product and a preparation method thereof, and mainly to urea sulfate and a preparation method thereof. Under a melting temperature of 75-117 DEG C, a preheating temperature of 60-100 DEG C, and a mass ratio of a urea solution to a sulfuric acid solution of 11.83:1-2:1, the urea sulfate particles are prepared by a reaction, wherein a mass ratio of nitrogen to sulfur in the urea sulfate particles is 10:1-1:1. With the present invention, the defects of the traditional fertilizer are mainly overcome; the urea sulfate preparation method and the urea sulfate product are provided, with the method, the yield is increased, the product quality and the environment are not affected; the product has excellent advantages of energy-saving and cost-saving during the preparation.

Description

Technical field [0001] The invention relates to a fertilizer and a preparation method thereof, in particular to a urea sulfate and a preparation method thereof. Background technique [0002] Generally, the production process of mixing urea and sulfuric acid to prepare urea sulfate is complicated, and the produced urea sulfate particles are attached to the equipment, which affects the production output, and the properties of the produced urea sulfate particles are unstable. In addition, when traditional fertilizers are fertilized, they usually adopt the fertilization mode of "increasing the quantity and increasing the efficiency and increasing the pollution." Traditionally, the output of the product has increased, which improves the economic efficiency, but it affects the quality of the product and increases the environmental impact. Pollution not only affects people's health now, but also brings incalculable harm to our descendants. Summary of the invention [0003] The purpose o...

Claims

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Application Information

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IPC IPC(8): C07C275/02C07C273/02C05C9/00
CPCY02P20/50
Inventor 熊建超
Owner 熊建超
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