a device for exchanging a die plate of a molten bisphenol a prilling tower is described . the device comprises : at least two die plates ; a guide which is in contact with the die plates ; and a drive mechanism , wherein the drive mechanism moves the die plates linearly and serially between an operating position and an exchange position along the guide . also described is a process of automated operation of the device at the top of a bisphenol a prilling tower .