Current Location： Home > News > Chemical Knowledge > Production and manufacturing method and process of urea

[Chemical Knowledge]：Production and manufacturing method and process of urea

Read： 981 Time：18months ago Source：Transform the World with Simplicity

The manufacturing method
of urea
1. Introduction

urea is an important chemical product, widely used in agriculture, medicine, plastics, coatings and other fields. In the field of raw materials for chemical production, urea manufacturing methods have attracted much attention. This paper will introduce the manufacturing methods of urea, including ammoniation method, ammonium bicarbonate method, direct synthesis method, etc., and analyze its advantages and disadvantages, in order to provide reference for readers.

2. the nature and use of urea

urea is a white crystalline powder, tasteless and odorless, soluble in water. It has a high nitrogen content and is a commonly used nitrogen fertilizer. In addition, urea also has a variety of uses, can be used as animal feed additives, pharmaceutical intermediates, plastic raw materials.

3. urea manufacturing method

1. ammoniation method
ammoniation method is ammonium carbonate or ammonium bicarbonate mixed with ammonia water, under a certain temperature and pressure reaction, the formation of urea and carbon dioxide. The method is divided into high-pressure method and low-pressure method, the high-pressure method needs to be reacted at a higher pressure, and the low-pressure method is carried out at a lower pressure. The ammoniation method has the advantages of easy access to raw materials and simple operation, but the energy consumption is high, and a large amount of carbon dioxide will be produced in the production process.
2. ammonium bicarbonate method
ammonium bicarbonate method is to react ammonium bicarbonate with ammonia water at a certain temperature to generate urea, water and carbon dioxide. This method has the advantages of easy access to raw materials and mild reaction conditions, but it needs to consume a lot of energy in the production process, and produces a lot of waste gas and waste water.
3. direct synthesis of
direct synthesis of ammonia and carbon dioxide in a certain temperature, pressure and catalyst under the direct synthesis of urea. This method has the advantages of low energy consumption, low pollution and high yield, and has become the mainstream method of urea production.

4. manufacturing method advantages and disadvantages analysis

1 ammoniation method advantages: raw materials are readily available, easy to operate. Disadvantages: high energy consumption and large amounts of carbon dioxide.
2. Advantages of ammonium bicarbonate method: raw materials are readily available and the reaction conditions are mild. Disadvantages: high energy consumption, a large amount of waste gas and waste water.
3. Direct synthesis method has the advantages of low energy consumption, low pollution and high yield. Disadvantages: high requirements for equipment and catalyst.

5. Conclusion There are many manufacturing methods of

urea, including ammoniation method, ammonium bicarbonate method, direct synthesis method and so on. Each method has its advantages and disadvantages, and the appropriate manufacturing method should be selected according to the actual situation. The direct synthesis method has become the mainstream method of urea production because of its advantages of low energy consumption, low pollution and high yield. In the actual production process, factors such as raw material sources, energy consumption and environmental protection requirements should be fully considered to improve the production efficiency and economic efficiency of urea. At the same time, we will strengthen technological innovation and research and development to promote the green and sustainable development of the urea manufacturing industry.

Previous： Production and manufacturing method and process flow of potassium magnesium sulfate fertilizer

Next： Production and manufacturing method and process flow of new nitrogen fertilizer

News Categories