A method for preparing fish oil having decreased fish odor, which comprises slightly hydrogenating fish oil to have decrease rate of iodine value of 15% or less and decrease rate of highly unsaturated fatty acid of 33% or less. A method for preparing fish oil having decreased fish odor, which comprises slightly hydrogenating fish oil under the following non-selective conditions: (1) an amount of catalyst used in the hydrogenation is 0.05% by weight or more to an amount of the fish oil; (2) hydrogen pressure in gaseous phase at the beginning of the hydrogenation is 3kg/cm² or more; (3) reaction temperature of the hydrogenation is in the range from 90 to 150°C; (4) reaction time of the hydrogenation is in the range from 5 to 30 minutes. The fish oil is preferably sardine oil, mackerel oil, skipjack oil, tuna oil, skipjack orbital fat or tuna orbital fat.
一种降低鱼腥味的鱼油的制备方法,包括对鱼油进行轻微氢化,使其
碘值降低率在 15%或以下,高度不饱和
脂肪酸降低率在 33%或以下。一种制备降低鱼腥味的鱼油的方法,包括在以下非选择性条件下对鱼油进行轻微氢化:(1)氢化过程中使用的催化剂量为鱼油重量的 0.05% 或以上;(2)氢化开始时气相
氢气压力为 3kg/cm² 或以上;(3)氢化反应温度为 90 至 150°C;(4)氢化反应时间为 5 至 30 分钟。鱼油最好是沙丁鱼油、鲭鱼油、鲣鱼油、
金枪鱼油、鲣鱼轨道脂肪或
金枪鱼轨道脂肪。