Patent ID: 11897837
Assignee: ARKEMA FRANCE
Field: Organic fine chemistry (Chemistry)
Classification: CPC C | IPC C

Claim 5:
6. Process according to claim 1, wherein the reaction of step a) is performed in the presence of a catalyst chosen from catalysts based on alumina, thorium dioxide (ThO2), catalysts based on cadmium sulfide, catalysts based on the following oxides: MgO, ZrO2, TiO2 rutile (R) and anatase (A), CeO2, and γ-Al2O3, catalysts based on metal oxides, optionally supported on SiO2, Al2O3 or Nb2O5, catalysts based on alkali metal carbonates, catalysts based on alkali metal salts with transition metal acids impregnated on γ-alumina where the transition metal is selected from Cr, Mo, W and Ni, potassium tungstate on alumina K2WO4/Al2O3.