acetic acid from vinegar?

[Mountain_Girl]

Chromic,

Which patent out of lugh's* long list described azeotropic drying with chlorinated hydrocarbons ?
[Don't feel like going thru all of them]

Anyhow, I would say that while other combinations of acids & chlorinated hydrocarbons might work for drying, using tetrachloroethylene to dry acetic acid is no good: their bp's are too close [GAA 118°C, perc 121 °C]. So after water removal, separation of the GAA from the perc becomes a bitch. And, as can be expected from close boilers, an azeotrope is formed [61.5% GAA, bp 107°C], so adding too much perc will also be a problem.

*

Patent GB2182271

must be wrong cos it describes a clamping device.
Mountain Boy