Deoxygenation of Benzoic Acid to Benzaldehyde

High acidity, corrosivity, and instability due to oligomerization/condensation reactions. 

The deoxygenation of benzoic acid to benzaldehyde is an alternative process for the production of benzaldehyde. There is the formation of tmdesired by-products that cause environmental impact [16, 17]  

Studying the selective hydrogenation (deoxygenation) of benzoic acid to benzaldehyde in one step minimizing formation of by-products and waste. 

Koutstaal and Ponec [18] studied the deoxygenation of benzoic acid to benzaldehyde with four group oxides (Zr02, Hf02, and Ti02) and the effect of addition of Cu to Pt and Z1O2 selectivity to benzaldehyde. The results of the catalytic tests are shown in Fig. 5.17. 

Lange et al. [20] investigated the deoxygenation of benzoic acid to benzaldehyde with ZnO and Zr02 and proposed the following mechanism (Fig. 5.19). 

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