How to prepare acetone by propylene direct oxidation process?

How to prepare acetone by propylene direct oxidation process?

Acetone (acetone) is an important organic compound, which is widely used in coatings, cosmetics, medicine and industrial production. The traditional acetone preparation methods mainly include cumene oxidation method and olefin oxidation method, but these methods have the problems of complex process, high cost and unfriendly to the environment. In recent years, the direct oxidation process of propylene has become a research hotspot, which has the characteristics of simple reaction, high efficiency and environmental friendliness. In this paper, the principle, technical difficulties and future development direction of acetone preparation by direct oxidation of propylene are introduced in detail.

Background and Significance of 1. Direct Oxidation Process of Propylene

propylene (propylene) is an important olefin and a basic raw material in chemical production. The traditional acetone production method requires a multi-step reaction, the process is complex and the energy consumption is high. The core of the propylene direct oxidation process is to directly oxidize propylene to produce acetone through the action of a catalyst, thereby simplifying the production process and reducing the cost.

The key of propylene direct oxidation process is the selection of catalyst and the control of reaction conditions. The catalyst can accelerate the oxidation reaction and improve the selectivity of the product. The propylene direct oxidation process can also reduce the formation of by-products, thereby improving the purity and yield of the product.

Technical principle of 2. propylene direct oxidation process

the chemical reaction formula of the propylene direct oxidation process can be expressed:

2C3H6 3O2 → 2C3H4O 2H2O

in this reaction, propylene (C3H6) reacts with oxygen (O2) in the presence of a catalyst to produce acetone (C3H4O) and water (H2O). Catalyst selection is critical to the success of the process, and commonly used catalysts include metal oxides (e. g., potassium oxide, iron oxide) and molecular sieve composites. These catalysts can effectively improve the reaction rate and product selectivity.

In terms of reaction conditions, the propylene direct oxidation process is usually carried out under normal pressure or pressure, and the reaction temperature is generally controlled between 200 and 400 degrees Celsius. Sufficient oxygen supply is also required in the reaction system to ensure the smooth progress of the oxidation reaction.

Advantages of 3. propylene direct oxidation process

1. low cost The propylene direct oxidation process eliminates the separation and purification steps of the intermediate product, thereby reducing the production cost. As a cheap raw material, propylene further reduces the economy of the process.

2. Environment friendly Compared with the traditional acetone preparation method, the propylene direct oxidation process reduces the formation of by-products and reduces the pollution to the environment. Waste water and waste gases from the process are also easier to treat.

3. Low technical barriers The equipment of propylene direct oxidation process is relatively simple and easy for industrial application. This process does not require complicated separation and refining equipment, thereby reducing the investment cost of the equipment.

Application Prospect of 4. Propylene Direct Oxidation Process

propylene direct oxidation process has broad prospects in industrial applications. With the increasingly stringent environmental protection policies, the high energy consumption and high pollution problems of traditional preparation methods are gradually exposed, and the advantages of the direct oxidation process of propylene are more prominent. With the continuous progress of catalyst technology, the yield and selectivity of propylene direct oxidation process will be further improved.

Future research focuses on the following areas:

1. optimization of catalyst: Develop efficient, stable and highly selective catalysts to increase the yield of acetone.
2. optimization of reaction conditions: By regulating the reaction temperature, pressure and oxygen concentration, the efficiency of the process is further improved.
3. industrial application: Promote the industrialization of propylene direct oxidation process, reduce production costs and meet market demand.

5. Summary

propylene direct oxidation process is an efficient, economical and environmentally friendly method for the preparation of acetone, which has broad industrial application prospects. With the continuous optimization of catalyst technology and reaction conditions, propylene direct oxidation process will become the main way of acetone production in the future. For the chemical industry, the promotion and application of this process can not only reduce production costs, but also reduce environmental pollution and promote sustainable development.