6 C3-4/3H5OH + 4 Cr2VIO72- + 32 H+ 9 C20H4O2 + 8 (CrIII)3+ + 16 H2O

This is an oxidation-reduction (redox) reaction:

18 C-4/3 - 24 e- 18 C0 (oxidation)

8 CrVI + 24 e- 8 CrIII (reduction)

C3H5OH is a reducing agent, Cr2O72- is an oxidizing agent.