Method for selective extraction of compounds from carbonaceous materials
AssigneeUnivesity Research & Marketing Inc.
InventorHenry L. Franke
Life of this patent
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Abstract
An improved low temperature process for extracting oil from oil-bearing materials by extracting the oil-bearing material in an extraction zone with a normally gaseous solvent selected from propane, butane, and mixtures thereof. As the resulting solvent/oil mixture is passed through the bed of extracted oil-bearing material, from the extraction zone, and to a separation zone, it is done so under conditions that will maintain the solvent in liquid form. The resulting extracted materials have substantially more of their protein and vitamin value intact when compared with similar materials extracted by more conventional high temperature methods. The present process is also a lower energy consuming process than more conventional, extractive processes.
Claims20
A process for extracting oil from an oil-bearing cooked food product, which process comprises treating the cooked food product with a normally gaseous solvent selected from the group consisting of butane, propane, and mixtures thereof, and separating oil-laden solvent from said cooked food product of reduced oil content.
A process for extracting oil from a food which has been cooked in oil, thereby resulting in an oil-bearing food product, which process comprises:
- (a) placing said oil-bearing cooked food product into an extraction zone;
- (b) removing air from said extraction zone;
- (c) introducing a normally gaseous solvent selected from butane, propane, and mixtures thereof, into the extraction zone so as to contact said oil-bearing cooked food product;
- (d) providing a pressure and a temperature in said extraction zone which is effective for maintaining the solvent in a liquid phase;
- (e) maintaining the solvent in contact with the oil-bearing cooked food product for an effective amount of time to remove a predetermined amount of oil;
- (f) introducing an inert gas into said extraction zone in a manner to displace said solvent and extracted oil from said extraction zone while maintaining temperatures and pressures in said extraction zone which are effective for maintaining said solvent in a liquid phase;
- (g) passing said displaced extracted oil and solvent to a separation zone under conditions which will maintain the solvent in the liquid phase;
- (h) separating said solvent from said extracted oil in said separation zone;
- (i) collecting said extracted oil;
- and
- (j) collecting the cooked food product containing substantially less oil.
Dependencies are inferred from the claim text.