glycol-water distillation

[aseptman]

A feed mix conatining 90% meg and 8-10 % water is to be distilled batchwise. Can anyone guide on foaming issues associated with this feed?

[ColinR33]

Foaming issues will depend on the cleanliness of the feed. Hydrocarbons, organic compounds, additives and particulates will all act to promote/stabilize foam. The best solution is to make sure it is clean, this means proper filtration, best is to have a particulate filter, activated charcoal filter and an afterfilter for removal of charcoal fines. If a significant amount of liquid HC is expected, a liquid/liquid separator is required.

[aseptman]

ColinR33, Thanks. By the way any azeotrope between meg and deg ( mono and di ethylene glycol)?

[ColinR33]

Not that I am aware of, MEG Globals website has good info.