cherstellung der Qualitat auch quantitative Aspekte hat, die nicht zuletzt die Qualitat beeintrachtigen konnen. Dynamic simulation of complex chemical processes. The detailed dynamic simulation of coupled process units in chemical plant is gaining increasing importance as an important tool in plant engineering and operation. This paper deals with basic problems in the development of a universally applicable dynamic simulator. General requirements are formulated. The program package DIVA currently under development is outlined. Simulation of the start-up phase of a simple production plant as an example demonstrates the mode of functioning and the potential of the simulator. Future work will concentrate on enlarging the model libraries and on increasing the efficiency and ease of use to meet the demands of industrial applications.