Extraction of carotenoids from plant material

• US 7,572,468 B1
• Filed: 12/27/2005
• Issued: 08/11/2009
• Est. Priority Date: 12/28/2004
• Status: Expired due to Fees

• Current Assignee: United States Department Of Agriculture
• Original Assignee: United Technologies Corporation (Raytheon Technologies Corporation d/b/a RTX), United States Department Of Agriculture
• Inventors: Chapman, Mary H., Ishida, Betty K., Randhava, Sarabjit Singh, Randhava, Sikander Singh
• Primary Examiner(s): FLOOD, MICHELE C
• Application Number:
  US11/319,148
• Time in Patent Office: 1,323 Days
• Field of Search: None
• US Class Current: 424/725
• CPC Class Codes: B01D 11/0257 using mixing mechanisms, e.g. stirrers, jets B01D11/0242 takes precedence
• CPC Class Codes: B01D 11/0288 Applications, solvents

Abstract

Methods for extraction of carotenoids from carotenoid-containing plant material using an extraction solvent comprising ethyl lactate. The invention is also directed to products obtained thereby. In the method, a sample of dry, particulate carotenoid-containing plant material is contacted with the ethyl lactate extraction solvent to extract the carotenoids. The method also includes the use of an ethyl lactate-ethanol blend as the extraction solvent. After extraction, the solvent containing the extracted carotenoids is separated from the extracted plant solids and treated to separate the dissolved carotenoids from the extraction solvent and obtain a carotenoid-containing concentrate. The concentrated carotenoid product may be used directly or may be subjected to further treatment. After removal of the dissolved carotenoids, the extraction solvent can be recycled for further use.

Claims

1. A composition for the extraction of carotenoids from plant matter consisting essentially of plant carotenoid-containing matter and a solution of ethyl lactate in combination with an amount of ethanol, wherein the amount of ethanol is in a range of about 1% to about 20% volume/volume (v/v) of the solution.

2. The composition of claim 1 wherein the amount of ethanol ranges from about 5 to about 7%.

3. The composition of claim 1, wherein the plant matter is selected from the group consisting of fruits, vegetables and mixtures thereof.

4. The composition of claim 3, wherein the fruits are selected from the group consisting of tomato, watermelon, Gac (Momordica cochinchinensis), papaya, guava, mango, and grapefruit.

5. The composition of claim 1, wherein the plant matter is selected from among a group comprising pericarp, aril, leaves, roots, tubers, tomato pomace, tomato peel, tomato skins and mixtures thereof.

6. The composition of claim 3, wherein the vegetables are selected from the group consisting of autumn olive, carrots, parsley, and spinach.