Low-boiling node

Becomes difficult (may requite many stages or reflux) when temperatures of high and low boiling nodes of region differ by <10° C. 

Avoid attempts to recover simultaneously both high and low boiling nodes in high purity from mixtures of >3 components, particularly in columns that reflux compositions different from the distillate composition, ie, reflux of one phase from a decanter, as such operations may be difficult to control. 

In Region II, the high- and low-boihng nodes are MIPK and the MEK-water azeotrope, respectively. The more complicated cyclo-hexane-ethanol-water system (Fig. 13-58c) has three separatrices and three regions, all of which share the ternaiy azeotrope as the low-boiling node. 

Low-antimony lead alloys, 14 770 Low-birefringence polycarbonates, 19 822 Low-blush copolymers, 26 538 Low boiling node, in separating nonideal liquid mixtures, 22 303 Low-calorie beer, 3 577 Low calorie sweeteners, 12 38 Low calorific value (LCV) gas, 26 575—576... 

By far, the most common prejudice (sometimes completely overlooking the other alternative) is to propose the most volatile composition (low-boiling node) as distillate (Fig. 28). In this region containing the decant aqueous layer, the lightest composition is the ternary azeotrope. With enough stages, all of the azeotropic composition in the decant aqueous layer may be recovered, and the underflow will contain only a binary ethanol-water mixture. If the distillate of... 

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