油脂の選択的水素添加および触媒に関する研究 (第1報)
KW型およびアドキンス触媒による水素添加に関する研究
1962 年 11 巻 2 号 p. 60-64
詳細
1962 年 11 巻 2 号 p. 60-64
A refined finback whale oil was hydrogenated under atomospheric hydrogen pressure using three different type catalysts, namely, KW type (J. Pat. 200, 077), U-Ni-A (J. Pat. 204, 353), and reduced Ni-Cu catalysts. A micropenetration test was observed to compare the products, hydrogenated to almost the same level of 70 in Iodine Number, and the soft products in order were using KW, U-Ni-A and reduced Ni-Cu. The KW type catalyst presumed to be sensitive against free fatty acid content in material oil and the lowering in Acid Number to less than 0.4 was indispensable to re-use the catalyst. A simple method was proposed to regain and accelerate activity of the KW type catalyst by treating spent catalyst with alkaline solution under aerating oxidation. By applying the above treatment, the KW type catalyst could be re-used four times satisfactorily in whale oil hydrogenation and a possibility of further re-using was predicted. A refined sperm whale oil was hydrogenated under atomospheric hydrogen pressure with 2% KW type catalyst and a highly decolored and almost odorless stabilized product was obtained without any conspicuous change in its inherent characteristics. A carefully prepared 2% Adkins catalyst proved to hydrogenate refined finback whale oil almost as active as the KW type and could also be re-activated and re-used by the above treatment.
