Abstract: In the electrolytic cell with proton exchange membrane as a diaphragm, the reaction conditions for preparing 2-pyridinecarboxylic acid from 2-picoline via indirect electrooxidation with Cr₂O₇^2-/Cr³⁺ as a mediator were studied, the results show that concentrations of H₂SO₄, Cr₂(SO₄)₃ and 2-picoline, reaction temperature and anode potential have an important influence on yield, conversion, selectivity and current efficiency. The optimal conditions ara as follows: H₂SO₄ concentration 6.0 mol/L, reaction temperature 60 ℃, Cr₂(SO₄)₃ concentration 0.15 mol/L, 2-Picoline concentration 0.1 mol/L, anode potential 1.50 V.

Key words: 2-Picoline, 2-Pyridinecarboxylic acid, Cr₂O₇^2-/Cr³⁺, Indirect electrooxidation