# US 7,611,082 B2 · Method for the production of powder with high tannin content and its use

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- Number: US 7,611,082 B2
- Document ID: US7611082B2
- Status: Granted
- Kind: B2
- Application number: 11/700,185
- Filed: 2007-01-31
- Published: 2007-06-07
- Granted: 2009-11-03
- Earliest claimed: 2002-03-08
- Assignees: Wood One Co., Ltd.; Monashi University
- Inventors: Yusho Nakamoto; Toshihiko Tsunoda; Keiko Ono; Hiroyuki Yano; Yoshikazu Yazaki; Huijian Jiang; Frank Lawson; Peter Heinz Theodore Uhlherr
- Web page: https://patentgrep.com/patent/US7611082B2

## CPC

- C08H 8/00: Macromolecular compounds derived from lignocellulosic materials {(pretreatment thereof B27N)}
- B07B 9/00: Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets
- C08H 99/00: Subject matter not provided for in other groups of this subclass {, e.g. flours, kernels}
- C08L 97/02: Lignocellulosic material, e.g. wood, straw or bagasse {(manufacture of articles made from lignocellulosic material by dry processes B27N)}
- C09J 161/00: Adhesives based on condensation polymers of aldehydes or ketones (with polyalcohols C09J159/00; with polynitriles C09J177/00); Adhesives based on derivatives of such polymers
- C09J 161/06: of aldehydes with phenols
- C09J 197/00: Adhesives based on lignin-containing materials (based on polysaccharides C09J101/00 - C09J105/00)
- C09J 197/02: Lignocellulosic material, e.g. wood, straw or bagasse
- C09J 199/00: Adhesives based on natural macromolecular compounds or on derivatives thereof, not provided for in groups C09J101/00 -C09J107/00 or C09J189/00 - C09J197/00
- C08L 61/00: Compositions of condensation polymers of aldehydes or ketones (with polyalcohols C08L59/00; with polynitriles C08L77/00); Compositions of derivatives of such polymers
- C08L 61/06: of aldehydes with phenols
- C08L 97/00: Compositions of lignin-containing materials (of polysaccharides C08L1/00 - C08L5/00)
- C08L 2205/02: containing two or more polymers of the same C08L -group
- C08L 2205/03: containing three or more polymers in a blend
- C08L 2666/02: Organic macromolecular compounds, natural resins, waxes or and bituminous materials
- C08H: DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS (polysaccharides C08B; natural rubber C08C; natural resins or their derivatives C09F; bituminous materials C10)
- B07B: SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL (wet separating processes, sorting by processes using fluent material in the same way as liquid B03; combinations of dry separating apparatus with wet separating apparatus B03B; using liquids B03B, B03D; sorting by magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high voltage electric fields B03C; centrifuges or vortex apparatus for carrying out physical processes B04; hand sorting, postal sorting, sorting by switching or other devices actuated in response to detection or measurement of some feature of articles or samples of material B07C)
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- C09J: ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES (preparation of glue or gelatine C09H)

## Abstract

A method of producing powder with a high tannin content includes pulverizing a tannin-containing plant such as bark of radiata pine (Pinus radiata) and classifying the pulverized material into fine particles having a desired particle size, for example, fine particles having a particle diameter of 100 to 1,000 μm or less. A powder with a high tannin content is produced by such a method. The thus obtained powder with a high tannin content exhibits excellent characteristics when used as an adhesive, a binder, etc. for wood materials.

## Claims

### Claim 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.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the crushing is a mechanical pulverization.

### Claim 3 (depends on 2)

The method according to claim 2, wherein the mechanical pulverization is performed with an apparatus comprising at least one of a hammer mill, a Wiley mill, a ball mill, a roller mill and a high speed rotary crusher.

### Claim 4 (depends on 1)

The method according to claim 1, wherein the classification is performed with a classifier.

### Claim 5 (depends on 4)

The method according to claim 4, wherein the classification of the particles is performed with at least one of a screen classifier comprising at least one of a rotary drum screen and a sieve shaker, and a dry classifier based on at least one of gravitational classification, inertial classification and centrifugal classification.

### Claim 6 (depends on 1)

The method according to claim 1, wherein the wood bark is of radiata pine (Pinus radiata).