中文摘要：

通过几种脂肪酸捕收剂浮选钛铁矿试验及脂肪酸分子的量化计算，研究了脂肪酸烃基长短及其不饱和度对其捕收性能的影响。结果表明，随着烃基长度的增长增加了其疏水性，随着烃基不饱和度的增加使其在水中容易溶解和弥散，从而使得脂肪酸的捕收能力增强。

英文摘要：

The effects of length and unsaturation degree of the alkyl group of fatty acid on its collecting performance are studied by the flotation tests on several fatty acid collectors for ilmenite and the quantum chemistry calculation of fatty acid molecules. The result shows that the hydrophobicity of fatty acid increases with the increase of its alkyl group length and the fatty acid is prone to dissolve and disperse in water with the increase in the unsaturation degree of its alkyl group, thus enhancing its collecting ability.