>>12797182Chemists deal with fundamental stuff like reaction schemes and rate laws that you can find in a lab. ChemEs take those lab scale results and apply them at the industrial scale.
Good example is distillation, a chemist would learn lab scale separations, stuff like saddles in a small packed column or liquid-liquid extractions, and they'd really only be small parts of a bigger lab course meant to get you from point A to B
A chemical engineer will learn these fundamentals too, but then blow them up to a scale where you can look at flows around stages, different feed conditions, and all sorts of factors plus how this affects the economics of the operation and capital expenses