Process for producing terephthalic acid

Details Process for producing terephthalic acid Process for producing terephthalic acid

C - Chemistry, Metallurgy

07

C

260/511

C07C 63/26 (2006.01) C07C 51/265 (2006.01)

Patent

CA 1051024

PROCESS FOR PRODUCING TEREPHTHALIC ACID ABSTRACT OF THE DISCLOSURE Terephthalic acid having a purity of 99% or more can be produced in a yield of 95% by mole or more by oxidizing p-tolualdehyde or a mixture of p-tolualdehyde and p-toluic acid with molecular oxygen in a solvent in the presence of a cobalt salt catalyst under the conditions that (1) a Co/solvent ratio is 0.05 to 0.70% by weight and (2) a toluic acid/Co ratio is 0.1 to 3.0 moles/gram atom, without using either a promoter or an oxidation accelerator.

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