发明授权
US4441984A Recovery of oil from oil-bearing limestone 失效
从含油石灰石回收油

Recovery of oil from oil-bearing limestone
摘要:
Hydrocarbon liquids are recovered from run-of-mine oil-bearing rock composed primarily of limestone by separating the rock into a low-density fraction and a high-density fraction, contacting the low-density fraction with an organic solvent in an extraction zone thereby extracting the oil from the low-density fraction, and recovering the extracted oil from the organic solvent.
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