Method for obtaining aromatics and dyestuffs from bell peppers
AssigneeFried. Krupp Gesellschaft mit beschrankter Haftung
InventorsHubert Coenen, Rainer Hagen, Manfred Knuth
Life of this patent
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Abstract
Method for obtaining aromatics and/or dyestuffs from bell peppers wherein red pepper is extracted with a solvent which is in a supercritical state and is gaseous under normal conditions. The extraction takes place at a pressure of >P.sub.k to 350 bar and a temperature of >T.sub.k to 70.degree. C. The extracted aromatics and/or dyestuffs are separated from the separated supercritical gas phase by lowering the density of the gas phase.
Claims25
Process for treating bell peppers which contain aromatics and dyestuffs by extraction of the peppers with a solvent, comprising:
- extracting dried, comminuted red pepper with a solvent which is in the supercritical state with respect to pressure and temperature and which under normal conditions is a gas, at a pressure of >p.sub.k to 350 bar and a temperature of >T.sub.k to 70.degree. C. to form (a) a charged supercritical gas phase containing an extract which comprises at least the aromatics or the dyestuffs and (b) an extraction residue;
- separating the charged supercritical gas phase from the extraction residue;
- and
- separating the extract from the separated, charged supercritical gas phase by a reduction in the density of the gas phase.
Process for obtaining dyestuffs from bell peppers which are substantially free of capsaicin by extraction of the peppers with a solvent, comprising:
- extracting dried, comminuted red pepper which is substantially free of capsaicin in an extraction stage with a solvent which is in the supercritical state with respect to pressure and temperature and which under normal conditions is a gas, at a pressure of 150 to 350 bar and a temperature of >T.sub.k to 70.degree. C. to form (a) a charged supercritical gas phase containing extracted dyestuff and (b) an extraction residue;
- separating the charged supercritical gas phase from the extraction residue;
- and
- separating the extracted dyestuffs from the separated, charged supercritical gas phase by a reduction in the density of the gas phase.
Process for treating paprika oleoresin which contains aromatics and dyestuffs by extraction of the paprika oleoresin with a solvent, comprising:
- extracting paprika oleoresin with a solvent which is in the supercritical state with respect to pressure and temperature and which under normal conditions is a gas, at a pressure of >p.sub.k to 350 bar and a temperature of >T.sub.k to 70.degree. C. to form (a) a charged supercritical gas phase containing an extract which comprises at least the aromatics and (b) an extraction residue which comprises at least the dyestuffs;
- separating the charged supercritical gas phase from the extraction residue, and
- separating the extract from the separated, charged supercritical gas phase by a reduction in the density of the gas phase.
Dependencies are inferred from the claim text.