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Water removing agent

Acetic acid can be dehydrated (cracked) to ketene and water.

Triethyl phosphate is used to trap the water produced by producing phosphoric acid (which is neutralised with ammonia or pyridine).

Alan Heaton (Ed.) An Introduction to Industrial Chemistry, Blackie (1996)

Reaction defined as:
Decomposition by Heat (Pyrolysis)
Dehydration
Industrial Process: Organic