HC Plastics News:
Plastic products are found everywhere in our daily lives and are extremely versatile. However, as a raw material for the production of plastics, phenol, etc., its industrial production process is often high energy consumption and high pollution, and there are problems such as excessive oxidation and low yield, and many undesirable by-products. Recently, experts from Nanjing University of Technology have achieved important results in the reaction of phenolic compounds catalyzed by zeolitic molecular sieves to prepare phenolic compounds, which contributes to the efficient production of plastic products. The related papers are published in Nature Communication.
Phenolic compounds, such as phenol and cresol, are a wide range of widely used chemicals that can be used in the preparation of pesticides, pesticides, plastics, dyes, pharmaceuticals, polymers, and the like. The urgent pressure of energy and environment requires the development of green chemical processes. In the industrial production process, it is urgent to use new catalytic processes with high selectivity and high atomic utilization. This development relies mainly on the development and development of new catalytic materials.
In order to break the bottleneck of high energy consumption and high pollution in the production process, Professor Wang Jun and Associate Professor Zhou Yu of the State Key Laboratory of Materials Chemical Engineering and the School of Chemical Engineering of Nanjing University of Technology, together with Professor Yan Ning of the National University of Singapore, used clean oxygen sources such as hydrogen peroxide to pass the environment. The friendly benzene hydroxylation reaction produces phenolic compounds in a single step in a highly efficient and environmentally friendly manner, unlike conventional methods requiring cumbersome multiple reaction steps, high energy consumption, high pollution, and low yield.
"Benzene is an inert substrate, and its product phenol is more active than benzene. In the preparation of phenol in the past, in the process of producing phenol, the phenol will continue to oxidize, resulting in a series of serious side reactions." Professor Zhou Yu said that the use The utilization rate of conventional catalysts is not high, and the reaction time is often as long as ten to several tens of hours, which is difficult to meet the needs of industrial catalysis. “Our research group has used innovative methods to prepare zeolite molecular sieve catalysts containing vanadium, silicon and oxygen. By using this new catalyst, when hydrogen peroxide reacts with benzene to produce phenol, it will not cause adverse reactions with relatively active phenol. Reaction, producing bad by-products."
The new catalyst developed by the research group allows the hydrogen peroxide to be "directed" to react only with benzene, and the phenol is directly prepared in one step, and the yield of pure phenol is extremely high. In the course of the reaction, only water is produced, and no other wastes and other pollution emissions are green. Moreover, this new type of catalyst can instantaneously react and greatly improve the efficiency of obtaining phenol.
The use of this catalyst is expected to achieve industrial green production of phenolic compounds such as phenol, thereby replacing the original high energy consumption and high pollution path, achieving energy saving, sustainable development of chemical processes, and therefore has important industrial application prospects.
Interestingly, the innovative preparation method of this catalyst has a wide range of universality, and can further construct zeolite molecular sieves containing different metals, such as iron, copper, manganese and the like, to prepare a highly efficient heterogeneous catalyst. Other types of chemicals can benefit from green production. 
Editor in charge: Yao Chunlin
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