Ways of Regeneration of Highly Effective Catalysts Based on Mo-V-P Heteropoly Acid Solutions
EuropaCat-XII: 12th European Congress on Catalysis “Catalysis: Balancing the use of fossil and renewable resources”
30 Aug - 4 Sep 2015
||EuropaCat XII. Catalysis: Balancing the use of fossil and renewable resources. XII European Congress on Catalysis, Kazan (Russia), 30 August - 4 September, 2015 : Book of Abstracts
Boreskov Institute of Catalysis. Novosibirsk.2015.
2184 c. ISBN 9785906376107.
Boreskov Institute of Catalysis SB RAS
In oxidative processes involving homogeneous catalysts based on aqueous solutions of Mo-V-phosphoric heteropoly acids with Keggin composition H3+xPMo12-xVxO40 (НРА-х), the catalyst regeneration step (oxidation of the reduced НРА-х form) usually is the key reaction. It determines the processability of the catalyst, i.e. the possibility to implement an effective two-stage catalytic process of substrate oxidation with oxygen. The work discusses various ways of regeneration of the НРА-х solutions: 1) by O2 at temperatures 150−170 С and РО2 = 3−4 atm; 2) by the 30 % H2O2 solution and 3) by oxygen air under atmospheric pressure with the addition of nitric acid