Heat integration of distillation columns into overall processes

There are many well-known schemes for better energy efficiency in distillation. Examples are thermal coupling, multiple effect, heat pumping, etc. Usually these schemes are discussed for individual columns in isolation, independently from the overall process they are a part of. This paper puts the design of individual distillation columns into context with the heat integration for the overall process. An insight is discussed w Generally, the paper defines good integration as a column not crossing the heat recovery pinch of the process and either the reboiler or the condenser