Dye and method for making same
AssigneeUniversity of Arkansas
InventorsLuoqing Yang, Ron Buescher
Life of this patent
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Abstract
The present invention provides a modified turmeric. The modified turmeric is a phosphorylated turmeric that results in a structure having greatly improved stability in the presence of light, and solubility in the presence of a solution. The invention produces a natural dye for use as a substitute for yelIow dye No. 5.
Claims20
A method for modifying a turmeric for use as a dye, comprising the step of:
- phosphorylating a turmeric.
A method for modifying a turmeric for use as a dye, comprising the steps of:
- dissolving a turmeric in an aqueous alkali solution to produce a mixture;
- maintaining the mixture at a predetermined pH range;
- and
- adding a phosphorylating agent to the mixture to create a modified turmeric.
A method for modifying a turmeric for use as a dye, comprising the steps of:
- a) dissolving a turmeric in an aqueous alkali solution;
- b) cooling a resultant mixture while maintaining the mixture at a predetermined pH;
- and
- c) adding a phosphorylating agent to the mixture to create a phosphorylated turmeric.
A dye comprising:
- a phosphorylated turmeric, said turmeric comprising curcumin and curcuminoids.
A dyed product including a yellow dye wherein the yellow dye is a phosphorylated tumeric and wherein said product is selected from the group consisting of a cosmetic, a pharmaceutical, and a foodstuff.
Dependencies are inferred from the claim text.