PROCESS FOR EPOXIDATION START-UP

摘要

A METHOD FOR THE START-UP OF A PROCESS FOR THE EPOXIDATION OF ETHYLENE COMPRISING: INITIATING AN EPOXIDATION REACTION BY REACTING A FEED GAS COMPOSITION CONTAINING ETHYLENE, AND OXYGEN, IN THE PRESENCE OF AN EPOXIDATION CATALYST AT A TEMPERATURE OF ABOUT 180 DEG C. TO ABOUT 210 DEG C.; ADDING TO THE FEED GAS COMPOSITION ABOUT 0.05 PPM TO ABOUT 2 PPM OF MODERATOR; INCREASING THE FIRST TEMPERATURE TO A SECOND TEMPERATURE OF ABOUT 240 DEG C. TO ABOUT 250 DEG C., OVER A TIME PERIOD OF ABOUT 12 HOURS TO ABOUT 60 HOURS; AND MAINTAINING THE SECOND TEMPERATURE FOR A TIME PERIOD OF ABOUT 50 HOURS TO ABOUT 150 HOURS.