Question

What are the applications of agitated thin-film evaporators?

(a) Purification of sensitive organic chemicals

(b) Vapor recompression for energy recovery

(c) Devolatilization of thermoplastics

(d) Devolatilization of thermoplastics and purification of sensitive organic chemicals

This question was addressed to me in class test.

My doubt stems from Evaporation of Heat Sensitive Materials topic in chapter Evaporation of Food Processing Unit Operations

Answer 1

Correct choice is (d) Devolatilization of thermoplastics and purification of sensitive organic chemicals

To explain I would say: Purification of sensitive organic chemicals like natural oils, fatty acids, herbicides and insecticides and isocyanates, and devolatilization of thermoplastics, phenolicresins, acrylic resins, silicone polymers and nylon.