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Researchers from Nanjing University of Technology have recently made important progress in the zeolite molecular sieve-catalyzed hydroxylation of aromatic hydrocarbons to prepare phenolic compounds, and successfully achieved the instantaneous reaction of direct hydroxylation of more than 10 aromatic hydrocarbons, including benzene, to prepare phenolic compounds
.
Professor Jun Wang’s research group used the dry glue method of acid hydrolysis of silicon sources to prepare a full silica zeolite molecular sieve catalyst, which realized the instantaneous reaction of direct hydroxylation of more than 10 aromatic hydrocarbons to prepare phenolic compounds.
The reaction time was less than 30s, which was much shorter than the previous one.
The report requires a reaction time of ten to tens of hours, and at the same time has an ultra-high TOF (transition frequency) value
.
Phenol is an important chemical raw material.
The multi-step cumene method commonly used in industry has the disadvantages of low phenol yield, serious pollution, and high energy consumption.
For a long time, a one-step method for preparing phenol by hydroxylation of benzene with a clean oxygen source such as hydrogen peroxide It has received extensive attention from academia and industry
.
However, benzene is an inert substrate.
The product phenol is easier to activate than the substrate benzene.
For alkylbenzene, its side chain is more active, which often leads to a series of serious side reactions such as benzene ring peroxidation or side chain oxidation.
Happen
.
Therefore, direct activation of the carbon-hydrogen bonds of the benzene ring to generate phenol with high selectivity requires a targeted high-activity catalyst, which has been facing huge challenges in the field of heterogeneous catalysis
.
Professor Wang Jun’s research group has been committed to the study of the synthesis of heteroatom zeolites by acid hydrolysis of silicon sources.
The new catalytic reaction system discovered this time has also been completed on the basis of long-term accumulation
.
The new molecular sieve has ultra-high TOF and space-time yield, good substrate applicability, and stable catalyst recycling performance, showing important potential industrial application prospects
.
.
Professor Jun Wang’s research group used the dry glue method of acid hydrolysis of silicon sources to prepare a full silica zeolite molecular sieve catalyst, which realized the instantaneous reaction of direct hydroxylation of more than 10 aromatic hydrocarbons to prepare phenolic compounds.
The reaction time was less than 30s, which was much shorter than the previous one.
The report requires a reaction time of ten to tens of hours, and at the same time has an ultra-high TOF (transition frequency) value
.
Phenol is an important chemical raw material.
The multi-step cumene method commonly used in industry has the disadvantages of low phenol yield, serious pollution, and high energy consumption.
For a long time, a one-step method for preparing phenol by hydroxylation of benzene with a clean oxygen source such as hydrogen peroxide It has received extensive attention from academia and industry
.
However, benzene is an inert substrate.
The product phenol is easier to activate than the substrate benzene.
For alkylbenzene, its side chain is more active, which often leads to a series of serious side reactions such as benzene ring peroxidation or side chain oxidation.
Happen
.
Therefore, direct activation of the carbon-hydrogen bonds of the benzene ring to generate phenol with high selectivity requires a targeted high-activity catalyst, which has been facing huge challenges in the field of heterogeneous catalysis
.
Professor Wang Jun’s research group has been committed to the study of the synthesis of heteroatom zeolites by acid hydrolysis of silicon sources.
The new catalytic reaction system discovered this time has also been completed on the basis of long-term accumulation
.
The new molecular sieve has ultra-high TOF and space-time yield, good substrate applicability, and stable catalyst recycling performance, showing important potential industrial application prospects
.
