Abstract: The invention relates to a developer device for designing a control system comprising automation software and automation hardware for the automatic operation of a process. The designing device comprises a design module which is embodied in order to design the automatic software, an engineering module which is connected to the design module in order to receive the automation software, and which is configured in order to project the automation hardware based on the automation software and to produce projection data on the automation hardware, and a simulation module for simulating the automation software and the processes, and which is connected to the engineering module which is used to receive the projection data, in addition to the design module which is used to transfer simulated process data.

Abstract: A process for the preparation of phthalic anhydride (PA) of catalytic oxidation of naphthalene or o-xylene with air, a preheated mixture of air and naphthalene or o-xylene being passed into a reactor charged with the catalyst, and the reaction gas leaving the reactor being passed through a separator in which the PA is separated out as a solid, in which process the air fed to the reactor is preheated, before or after the admixture of naphthalene or of o-xylene, by using it to cool the reaction gas in the PA separator.