Acetic Acid → Terephthalic Acid

Participants

Reaction Steps

An example of the liquid-phase oxidation reaction is as follows. For example, using an apparatus with a commercial scale, p-xylene is subjected to liquid-phase oxidation by air (reaction temperature: 200 [° C.]; reaction pressure: 1.5 [MPaG]) in the presence of cobalt acetate, manganese acetate and hydrobromic acid in hydrous acetic acid to obtain a crude terephthalic acid slurry (the concentration of terephthalic acid: 34% by weight; the concentration of water in the hydrous acetic acid that is a dispersing medium: 11% by weight), and the resulting slurry is then introduced into crystallization vessels connected in series to subject the slurry to sequential pressure drop.

Provenance & Evidence