A Study of the Conversion of pToluic Acid to Terephthalic Acid with High Pressure Oxygen

Production of Benzene Poly(carboxylic acid)s and Small-Molecule Fatty Acids from Lignite by Catalytic Oxidation in NaVO3/H2SO4 Aqueous Solution with Molecular Oxygen

“…Vanadium-based catalysts were widely used in catalytic oxidation reactions because of its excellent catalytic performance. − Shreve et al studied catalytic oxidation of 1-methyl naphthalene and 2-methyl naphthalene to phthalic acid with V 2 O 5 as the catalyst. Using vanadate catalyst, xylene could be oxidized to toluic aldehyde and phthalic anhydride .…”

“…Using vanadate catalyst, xylene could be oxidized to toluic aldehyde and phthalic anhydride. 26 Emerson et al 24 transformed the p-toluic acid to terephthalic acid with a high yield using potassium metavanadate as catalyst. Jian et al 29 studied catalytic oxidation of benzene to phenol with sodium metavanadate and the catalyst showed a high selectivity.…”

Aerobic Oxidation of p-Toluic Acid to Terephthalic Acid over T(p-Cl)PPMnCl/Co(OAc)2 Under Moderate Conditions

“…Toland et al [9] developed the method of PTA oxidation with aqueous base and sulfur at high-pressure over 15 MPa. Emerson et al [10] conducted the PTA oxidation with oxygen in the presence of Fe 2 O 3 and K 2 CO 3 in KOH solution at high-pressure (700 psi) and 240°C. Ishii et al [11] developed a new bromide free method for the oxidation of PTA in HOAc with 10% of NHPI, 0.5% of Co(OAc) 2 and 0.5% of Mn(OAc) 2 as catalyst at 100°C to yield TPA.…”