Cold solvent extraction process for extracting oil from oil-bearing materials
First Claim
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1. A process for reducing the amount of oil from an oil-containing material, which process comprises contacting the oil-bearing material in an extraction zone for an effective amount of time with a normally gaseous solvent in the liquid state at temperatures below about 0°
- and at substantially atmospheric pressure.
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Abstract
A process for removing oil from oil-bearing material at substantially atmospheric pressure and are relatively low temperatures. The preferred temperature is the boiling point of the solvent, particularly a normally gaseous solvent, at about atmospheric pressure. This temperature will typically be below the freezing point of water.
25 Citations
27 Claims
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1. A process for reducing the amount of oil from an oil-containing material, which process comprises contacting the oil-bearing material in an extraction zone for an effective amount of time with a normally gaseous solvent in the liquid state at temperatures below about 0°
- and at substantially atmospheric pressure.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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