*3.1.7. Hydrogenation of benzoic acid with cobalt catalysts*

Cobalt metal catalyst has been reported for the hydrogenation of carboxylic acid to alcohols [6]. Hydrogenation of benzoic acid was carried out with 5%Co/C, Co metal, and Ru-Co catalysts. These catalysts were, however, found to be inactive for the hydrogenation of both aromatic and carboxylic groups of BZA under the conditions mentioned in **Table 1**.


**Table 2.** Hydrogenation of benzoic acid with 5% Ru on different supports.

**Scheme 4.** Hydrogenation of benzoic acid with 5%Ru-29%Sn/Al<sup>2</sup> O3 catalyst.
