Method for making tetrahydrocurcumin and a substance containing the antioxidative substance tetrahydrocurcumin
First Claim
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1. Method for producing tetrahydrocurcumin, comprising reducing curcumin by a metallic catalyst in the presence of hydrogen in an organic solvent.
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Abstract
The present invention relates to a novel compound tetrahydrocurcumin and a substance containing the same, which are produced from curcumin or a substance containing it as a material. This substance has characteristic properties such as strong antioxidative activity and yellowish color generated from reducing the original color of curcumin. The curcumin is being produced from a Zingiberaceae plant classified into Curcuma longa as a tropical product and is used for a spice and a yellow pigment for curry powder and pickles. The present invention further relates to the production method.
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17 Claims
- 1. Method for producing tetrahydrocurcumin, comprising reducing curcumin by a metallic catalyst in the presence of hydrogen in an organic solvent.
- 6. Hardened oil containing tetrahydrocurcumin.
- 8. Method for producing a hardened oil containing tetrahydrocurcumin, comprising the steps of adding curcumin to fat or oil and reducing the fat or oil by hydrogen, thereby the curcumin being simultaneously changed into tetrahydrocurcumin by hydrogenation.
- 11. Method for producing reduced-form curcuminoids, comprising the steps of extracting the root of Curcuma longa into a first organic solvent, and reducing the obtained extract by a metallic catalyst in the presence of hydrogen in a second organic solvent.
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17. Method for producing reduced-form curcuminoids, comprising reducing curcuminoids by a metallic catalyst in the presence of hydrogen in an organic solvent.
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