SIMPLIFIED MODELS FOR BINARY BATCH DISTILLATION

The material balances of batch distillation with intermediate cuts to be recycled involve an iterative procedure until reaching a "steady operation" balance. Thus, the rigorous simulation approach to batch distillation optimization is computationally expensive. This work presents approximate models to expedite computer optimization of batch distillations with intermediate cuts, resorting to conventional NLP codes. The operations modeled are rectification and stripping with recycle of the intermediate cut.