US 9,808,023 B2
Process for producing purified tea extract
Eizo Maruyama, Kamisu (JP); Yukiteru Sugiyama, Kamisu (JP); Kenichi Shikata, Kamisu (JP); Keiji Shibata, Kamisu (JP); and Hideaki Ueoka, Kamisu (JP)
Assigned to Kao Corporation, Tokyo (JP)
Appl. No. 12/281,402
Filed by Eizo Maruyama, Kamisu (JP); Yukiteru Sugiyama, Kamisu (JP); Kenichi Shikata, Kamisu (JP); Keiji Shibata, Kamisu (JP); and Hideaki Ueoka, Kamisu (JP)
PCT Filed Mar. 1, 2007, PCT No. PCT/JP2007/000156
§ 371(c)(1), (2), (4) Date Sep. 2, 2008,
PCT Pub. No. WO2007/099715, PCT Pub. Date Sep. 7, 2007.
Claims priority of application No. 2006-056350 (JP), filed on Mar. 2, 2006; application No. 2006-102942 (JP), filed on Apr. 4, 2006; application No. 2006-234992 (JP), filed on Aug. 31, 2006; and application No. 2006-330934 (JP), filed on Dec. 7, 2006.
Prior Publication US 2009/0041921 A1, Feb. 12, 2009
Int. Cl. A23F 3/20 (2006.01)
CPC A23F 3/20 (2013.01) [A23F 3/205 (2013.01)] 12 Claims
 
1. A process for producing a purified tea extract, comprising adsorbing a tea extract on a synthetic adsorbent, washing the synthetic adsorbent with a basic aqueous solution or ethanol at a solvent concentration of from 0 to 5 wt %, contacting the synthetic adsorbent with ethanol at a solvent concentration of from 10 to 80 wt % to elute non-polymer catechins, and then bringing the eluate into contact with activated carbon in ethanol, wherein the synthetic adsorbent is an acrylic resin, methacrylic resin, polyvinyl resin or styrene resin.