Abstract: Removing olefins from reformate oil is a necessary operation to ensure that the bromine index of xylene feeds meets the design requirements. Traditional clay method have problems such as short service life, frequent change, and environmental pollution. It is necessary to find alternatives with long service life and good effect of deolefin. The application and current situation of mainstream liquid phase hydrogenation technology and molecular sieve catalyst technology for moving olefins were analyzed and compared. Considering the two aspects of device investment and device application, the molecular sieve catalyst DOT-300 was selected as a replacement plan for clay, and the bromine index of the feed and product before and after the application of the scheme was compared. The application effect of molecular sieve catalyst deolefin technology was verified. The application of this scheme can ensure that the bromine index of xylene products is qualified and the stable operation of the device, which is conducive to the long-term operation of the device.

Key words: C₈+ aromatics, deolefination, zeolite catalyst, DOT-300, bromine index, xylene