Highly fractionated designs chemical reaction processes

The favorable working conditions of the thin-film evaporator enabled the equally successful application of the thin-film principle for fractionation (5), absorption, chemical reactions (6), and drying (7, 8). In these processes and applications, the thin-film apparatus is used mainly to treat heat sensitive and lower-viscosity products that flow on the influence of gravity alone. This particular type of apparatus in a special design can also be used to process highly viscous products to... 

For production volumes that lie below about 10001 a , distUlative separation is preferably performed batchwise. For small product quantities, batch distillation has the advantage of lower investment costs, since the individual fractions can be separated one by one in the same plant. It is highly flexible, since it can easily be combined with other process steps. If the distillation vessel is designed as a stirred tank, then other reaction steps such as dissolution of sohds, chemical reactions, distUlative solvent change, liquid-liquid extraction, evaporative crystallization, crystallization with cooling, and precipitation can be carried out in the distillation appartus. 

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