01204nas a2200145   4500008004100000245008200041210006900123260000800192300001400200490000700214520068200221100001800903700002300921856011400944       2019                        eng d00aCatalytic hydrogenation products of aromatic and aliphatic dicarboxylic acids0 aCatalytic hydrogenation products of aromatic and aliphatic dicar  cAPR  a1137-11420 v313 aHydrogenation of aromatic dicarboxylic acids gave 100 % selectivity to respective cyclohexane dicarboxylic acid with 5 % Pd/C catalyst. 5 % Ru/C catalyst was observed to give over hydrogenation products at 493 K and at lower temperature (453 K) the selectivity for cyclohexane dicarboxylic acids was increased. Hydrogenation of phthalic acid with Ru-Sn/Al2O3 catalyst was observed to give phthalide instead of 1,2-benzene dimethanol or 2-hydroxy methyl benzoic acid. Ru-Sn/Al2O3 catalyst selectively hydrogenated the carboxylic group of cyclohexane dicarboxylic acids to give cyclohexane dimethanol. Use of proper catalysts and reaction conditions resulted in desired products.1 aShinde, Sunil1 aDeshpande, Raj, M.  uhttps://library.ncl.res.in/content/catalytic-hydrogenation-products-aromatic-and-aliphatic-dicarboxylic-acids01413nas a2200145   4500008004100000245006400041210006400105260000800169300001200177490000700189520093400196100001801130700002301148856009601171       2020                        eng d00aCatalytic hydrogenation of cinnamic acid and salicylic acid0 aCatalytic hydrogenation of cinnamic acid and salicylic acid  cJAN  a339-3410 v323 a<p><span style="color: rgb(51, 51, 51); font-family: Roboto, Arial, sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;">Hydrogenation of cinnamic acid and salicylic acid was carried out using 5 %Ru/C, 5 % Pd/C and Ru-Sn/Al2O3 catalyst at 493 K and 6.89 MPa of hydrogen partial pressure. Ru-Sn/Al2O3 catalyst was found to be active for hydrogenation -COOH group to give cinnamyl alcohol. The selectivity to cinnamyl alcohol was low (15 %) as absolute inhibition of C=C bond hydrogenation in cinnamic acid is challenging. 5 %Pd/C catalyst was found to hydrogenate C=C bond and aromatic ring in cinnamic acid. 5 %Ru/C catalyst was found to be least selective catalyst as it hydrogenated C=C bond, aromatic ring and -COOH group in cinnamic acid. Hydrogenation of salicylic acid is not possible at 493 K as decarboxylation of salicylic acid occurs.</span></p>1 aShinde, Sunil1 aDeshpande, Raj, M.  uhttps://library.ncl.res.in/content/catalytic-hydrogenation-cinnamic-acid-and-salicylic-acid