EXPERIMENTAL RESEARCHES ON CHLOROFORM EXTRACTION OF SOURCE ROCK
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摘要: 通常用索氏抽提法测得的氯仿沥青A是生油岩研究中一项基本参数。现行《氯仿沥青分析暂行操作规程》基本上满足了生产和科研工作的需要,但在实施过程中还存在一定问题。主要是以氯仿抽提液萤光低于三级作为“抽净”的标准,造成抽提时间过长,影响生产和科研工作的开展;恒重温度偏高,操作一不小心,一些C15以上的馏份,包括姥鲛烷和植烷都有不同程度的损失;另外,活性铜粉脱硫,过滤操作时间长,试剂用量大。为此,我们对生油岩抽提进行了比较系统的试验与研究。Abstract: Systematical experiments were mode on Chloroform extraction of source rock. Based on the result of the experiments, certain modifications and complements to the "Operating Manual of Chloroform extraction of source rock" are suggested. 1.The extractions are almost completed in a duration of 72 hours for detritus and 48 hours for carbonates. 2.The temperature for removing residual solvent in the extracts Should be lowered to 55-60℃(instead of 60-65℃)in order to keep lighter components in the extracts. 3.To seperate the element sulfur dissolved in solvent from organic extracts can be carried out during extraction by placing thin plates of red copper in the bottom of soxhle extractor,the element sulfur is reduced into cupric sulfide and pricipitated. 4.The commercial chloroform should be purified and the filter paper should be pre-extracted in order to minimize the blank to less than I mg fer each run.
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[1] 盛国英、徐芬芳1978年《地质地球化学》1-9科学技术文献出版社. [2] Radke.1978《Anal,Chen.》Vol. 50 No.4 663-665. -
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