	US 7,611,082 B2
	Method for the production of powder with high tannin content and its use
Yusho Nakamoto, Hatsukaichi (Japan); Toshihiko Tsunoda, Hatsukaichi (Japan); Keiko Ono, Saeki-ku (Japan); Hiroyuki Yano, Uji (Japan); Yoshikazu Yazaki, Moorabbin (Australia); Huijian Jiang, Clayton (Australia); Frank Lawson, Mitcham (Australia); and Peter Heinz Theodore Uhlherr, Mt. Waverley (Australia)
Assigned to Kabushiki Kaisha Wood One, Hatsukaichi-Shi (Japan); and Monashi University, Clayton (Australia)
Filed on Jan. 31, 2007, as Appl. No. 11/700,185.
Application 11/700185 is a continuation of application No. 10/377888, filed on Mar. 04, 2003, abandoned.
Claims priority of application No. 2002-064178 (JP), filed on Mar. 08, 2002.
Prior Publication US 2007/0125890 A1, Jun. 07, 2007
Int. Cl. B02C 17/02 (2006.01); B02C 7/00 (2006.01)

U.S. Cl. 241—24.29 [241/27]

6 Claims

1. A method for production of powder with a high tannin content, comprising:

crushing wood bark of at least one of radiata pine (Pinus radiata) and Acacia mangium, and

classifying the crushed wood bark to obtain particles having a particle size of 63 μm or less, wherein the obtained particles have a high tannin content of about 44% by weight or more and have a Stiasny value of about 97% or more.