Acetic Acid → Terephthalic Acid

Participants

Reaction Steps

All the same operations as in Example 1 were carried out except that a stock solution consisting of 1000 g of glacial acetic acid, 108 g of p-tolualdehyde, 122 g of p-toluic acid and 10 g of cobalt acetate (cobalt concentration 0.24% by weight based on the weight of the solvent) was charged into the reactor at a rate of 160 ml/hr. The value of toluic acid/cobalt in the reaction solution at a steady state was 1.34 and the average residence time of the reaction solution was 160 minutes. As a result, terephthalic acid having an acid value of 672 and a purity of 99.1% was obtained in a yield of 95.1% by mole.

Provenance & Evidence