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Aromatics isomerization technology is another core technology of our company. It mainly uses trimethylene or tetratoluene with low economic value to produce mesitylene and mesitylene with higher added value after isomerization, which improves the utilization value of aromatics and has positive social and economic benefits. In the picture, the unit for producing mesitylene with the technology of our company is shown in the picture. It is the only industrial unit in China to produce mesitylene by metatrimethylbenzene isomerization in China. It has been running smoothly for more than 10 years, bringing huge economic benefits to the refinery.