Process for the preparation of colorant from oleoresin

• US 20040191384A1
• Filed: 03/25/2003
• Published: 09/30/2004
• Est. Priority Date: 03/25/2003
• Status: Active Grant

• Current Assignee: Council of Scientific & Industrial Research
• Original Assignee: Council of Scientific & Industrial Research
• Inventors: Sowbhagya, Halagur Bogegowda, Naidu, Madeneni Madhava, Naik, Jarpla Pura, Sampathu, Sathyagalam Ranganatha Desikacharya
• Granted Patent: US 7,501,141 B2
• Time in Patent Office: Days
• US Class Current: 426/540
• CPC Class Codes: A23L 5/43 using naturally occurring organic dyes or pigments, their artificial duplicates or their derivatives

Abstract

The present invention relates to a process for the preparation of colorant with enhanced color value from commercially available pungent free chilli oleoresin by extracting the pungent free oleoresin with any one of alcoholic solvent, mixture of alcoholic solvents, mixture of alcohol-ketonic solvent or aqueous ketonic solvent, separating the oleoresin layer and the solvent layer, pooling the solvent layer obtained and separating the final oleoresin layer, and distilling the final oleoresin layer of step (c) to obtain pungent free oleoresin with enhanced color value.

Claims

1. A process for the preparation of colorant with enhanced color value from commercially available pungent free chilli oleoresin, the said process comprising steps of:

a) extracting the pungent free oleoresin with any one of alcoholic solvent, mixture of alcoholic solvents, mixture of alcohol-ketonic solvent or aqueous ketonic solvent at a temperature in the range of 0°

C. to 60°

C. for a time period of 30 minutes to 60 minutes,

b) separating the oleoresin layer and the solvent layer by conventional method,

c) repeating steps (a) and (b), pooling the solvent layer obtained and separating the final oleoresin layer, and

d) distilling the final oleoresin layer of step (c) to obtain pungent free oleoresin with enhanced color value.

2. The process as claimed in claim 1, wherein the colorant obtained is an oleoresin with enriched color.

3. The process as claimed in claim 1, wherein the oleoresin is selected from pungent free chilli oleoresin or paprika oleoresin associated with negligible pungency.

4. A process of claim 1, wherein in step (a) the alcoholic solvent used, is methanol.

5. A process of claim 1, wherein in step (a) the mixture of alcoholic solvents used, is methanol-isopropanol mixture.

6. A process of claim 1, wherein in step (a) the mixture of alcoholic ketonic solvent used, is methanol-acetone mixture.

7. A process of claim 1, wherein in step (a) the aqueous ketonic solvent used, is aqueous acetone.

8. A process of claim 5, wherein the ratio of methanol to isopropanol is in the range of 2:

98 to 70;

30.

9. A process of claim 6, wherein the ratio of methanol to acetone is in the range of 2:

98 to 70;

30.

10. A process of claim 7, wherein the ratio of water to acetone used is in the range of 5:

95 to 30;

70.

11. A process of claim 1, wherein in step (a) the ratio of oleoresin to solvent used, is in the range of 1:

3 to 1;

20.

12. A process of claim 1, wherein in step (d) the distillation of oleoresin is performed at a temperature in the range of 35°

to 50°

C. under reduced pressure.

13. A process of claim 1, wherein in step (d) the EOA color units of pungent free chilli oleoresin obtained has an enhanced value by 25.0 to 52.0%.

14. A process of claim 1 is carried out either by batch process or continuous process.