Method for recovering edible oil from adsorbent materials
AssigneeHunt-Wesson, Inc.
InventorMichael A. Rothbart
Life of this patent
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Abstract
Disclosed is a process for recovering an edible oil, such as soybean or canola oil, from an adsorbent material, such as a bleaching agent, by contacting a feed of the adsorbent material containing the edible oil with a normally gaseous solvent, such as liquid propane, for a time sufficient to extract a substantial portion of the oil from the adsorbent material, before the oil degrades to an appreciable extent.
Claims16
A process for selectively recovering soybean oil free from color bodies and/or other adsorbed impurities from acid activated clay containing soybean oil, color bodies and/or other adsorbed impurities comprising the steps of:
- selectively extracting soybean oil from a feed of acid activated clay containing soybean oil, color bodies and/or other adsorbed impurities by contacting the activated clay with propane, where the ratio of the feed to propane is from about 1:1.5 to about 1:2, while maintaining the solvent at a pressure of from about 650 to about 850 psi and at a temperature of from about 110.degree. to about 150.degree. F., for a time sufficient to selectively extract a substantial portion of the soybean oil from the activated clay and color bodies and/or other adsorbed impurities, before the soybean oil degrades to an appreciable extent,
- separating the soybean oil-containing propane from the activated clay and the color bodies and/or other adsorbed impurities, to recover the oil-reduced activated clay, and then
- separating the soybean oil from the propane to recover substantially undergraded soybean oil free from color bodies and other adsorbed impurities.
A process for selectively recovering an edible oil free from color bodies and/or other adsorbed impurities from an adsorbent material containing edible oil, color bodies and/or other adsorbed impurities comprising the steps of:
- selectively extracting an edible oil from a feed of adsorbent material containing the edible oil, color bodies and/or other adsorbed impurities by contacting the adsorbent material with a normally gaseous solvent, where the ratio of feed to solvent is from about 1:1 to about 1:3, while maintaining the solvent at a temperature and at a pressure at which the solvent is a liquid, for a time sufficient to selectively extract a substantial portion of the oil from the adsorbent material and color bodies and/or other adsorbed impurities before the oil degrades to an appreciable extent,
- separating the oil-containing solvent from the oil-reduced adsorbent material and the color bodies and/or other adsorbed impurities, to recover the oil-reduced adsorbent material, and then
- separating the oil from the solvent to recover substantially undegraded oil free from color bodies and other adsorbed impurities.
Dependencies are inferred from the claim text.