Abstract:

Silica was prepared by alkali dissolution-precipitation with oil shale as starting material, and the content of SiO₂ in oil shale was reduced.The detailed processing conditions were as follows: molar ratio of NaOH to SiO₂ was 4, mass ratio of water to oil shale was 1, the treating condition was at 100℃ for 6 h, and grain size was more than 0.15 mm.Then acid leaching of oil shale was performed to prepare γ-Al₂O₃, and the content of Al₂O₃ and Fe₂O₃ in oil shale was reduced too.The acid leachate solution was modulated to pH＝12.0 by adding alkali solution, and a mixture of γ-Al₂O₃ and Fe₂O₃ was precipitated and filtered, then γ-Al₂O₃ and Fe₂O₃ were separated completely by adding acid solution to pH＝6.0.Finally, the treated oil shale had a kerogen content of 71.6％ and the kerogen was validated by FT-IR.

Key words: 油页岩, 白炭黑, 氧化铝, 生态化利用

摘要：

利用油页岩为原料，首先采用碱溶-沉淀法制备了白炭黑，降低了油页岩中的SiO₂的含量，具体工艺条件为：NaOH/SiO₂（物质的量）＝4，水/油页岩（质量）＝1，100℃，6 h，粒径≥0.15 mm。然后采用酸浸法，制备了γ-Al₂O₃，降低了油页岩中的Al₂O₃和Fe₂O₃的含量，具体条件为：酸浸液中用NaOH溶液调整到pH＝12.0，过滤分离，再用HCl调整溶液pH＝6.0，使Al₂O₃和Fe₂O₃完全分离。最后得到了含量为71.6％的干酪根，并经FT-IR验证。

关键词: 油页岩, 白炭黑, 氧化铝, 生态化利用