Abstract: Based on the process characteristics and product distribution of resid to chemicals (RTC) unit, while considering the demands for the fluidization performance and physicochemical properties of the start-up catalyst, a scientific blend of selected equilibrium catalyst component, customized fresh component, and inert auxiliary was developed to create the tailored start-up catalyst TSC-R1. Compared to traditional start-up catalyst, the tailored start-up catalyst has excellent physical properties, higher propylene factor and lower coke selectivity, and can quickly match the start-up requirements of the target plant, enhancing the economic benefits of the RTC unit. The industrial application of TSC-R1 in SINOPEC Anqing Petrochemical Company 3.00 Mt/a RTC unit showed that the adjustment time of the unit was greatly shortened, and the time for the unit to achieve stable operation was only 7 d. The quick and stable reaction activity of the catalyst is helpful for the product distribution of the unit to reach the design condition and ensures economic benefits.

Key words: resid to chemicals, tailored start-up catalyst, coke selectivity, propylene factor