Method for manufacturing pulverized material and vibrating pulverizer

Patent metadata

Field	Value
Publication number	US-9724702-B2
Application number	US-201214234992-A
Country	US
Kind code	B2
Filing date	Jul 12, 2012
Priority date	Jul 25, 2011
Publication date	Aug 8, 2017
Grant date	Aug 8, 2017

Abstract

A particle diameter of a raw material to be pulverized can be decreased within a short time period. A vibration mill includes a container having therein a columnar space with a central axis of the columnar space being almost horizontal while the container is held so as to be vibratable in a direction of within a plane that is almost perpendicular to the central axis, a cylindrical medium disposed in the container so as to be vibratable, and a plurality of pulverizing media disposed inside the cylindrical medium so as to be vibratable. The ratio of an inner diameter of the cylindrical medium in contact with the pulverizing medium to an outer diameter of the pulverizing medium is 2.1 or more. The integrated value of volumes of the pulverizing media relative to a space volume inside the cylindrical medium in contact with the pulverizing medium is more than 25%.

First claim

The invention claimed is:

1. A method for manufacturing a pulverized material, wherein the method uses a vibration mill provided with:
a container having therein a columnar space with a central axis of the columnar space being disposed so as to be almost horizontal while the container being held so as to be vibratable in a direction of within a plane that is almost perpendicular to the said central axis,
a cylindrical medium disposed in the container so as to be vibratable, and
a plurality of pulverizing media disposed inside the cylindrical medium so as to be vibratable; in the said vibration mill
the ratio of an inner diameter of the cylindrical medium in contact with the pulverizing medium to an outer diameter of the pulverizing medium is 2.1 or more, and
the integrated value of volumes of the pulverizing media is more than 25% relative to a space volume inside the cylindrical medium in contact with the pulverizing medium; and
the method has a pulverizing treatment process of a raw material to be pulverized by vibrating the container after the said raw material to be pulverized is introduced into the container of the vibration mill.

2. The method for manufacturing a pulverized material according to claim 1 , wherein the pulverizing medium is a rod-like medium having the outer diameter in the range of 3 to 60 mm.

3. The method for manufacturing a pulverized material according to claim 2 , wherein the ratio of the length of the rod-like medium to the length of the columnar space in the direction of the central axis thereof inside the pulverizing container is in the range of 0.80 to 0.995.

4. The method for manufacturing a pulverized material according to claim 1 , wherein the pulverizing medium is a spherical medium having the outer diameter in the range of 3 to 60 mm.

5. The method for manufacturing a pulverized material according to claim 1 , wherein the difference between the inner diameter of the container and the outer diameter of the cylindrical medium in contact with inside of the container is in the range of 3 to 60 mm.

6. The method for manufacturing a pulverized material according to claim 1 , wherein the ratio of the length of the cylindrical medium in the direction of the central axis thereof to the length of the columnar space in the direction of the central axis thereof inside the container is in the range of 0.80 to 0.995.

7. The method for manufacturing a pulverized material according to claim 1 , wherein the ratio of the thickness of the cylindrical medium to the outer diameter of the said cylindrical medium is in the range of 0.02 to 0.7.

8. The method for manufacturing a pulverized material according to claim 1 , wherein the vibration mill has, as the cylindrical medium, a plurality of the cylindrical media having different outer diameters and inner diameters, and the said plurality of the cylindrical media are disposed in the embedded state in the container.

9. The method for manufacturing a pulverized material according to claim 8 , wherein, in the plurality of the cylindrical media disposed in the embedded state, difference between the inner diameter of the cylindrical medium disposed outside and the outer diameter of the cylindrical medium in contact with inside of the foregoing cylindrical medium is in the range of 3 to 60 mm.

10. The method for manufacturing a pulverized material according to claim 1 , wherein the raw material to be pulverized is a biomass raw material.

11. The method for manufacturing a pulverized material according to claim 10 , wherein the biomass raw material to be pulverized is a cellulose-containing raw material.

12. The method for manufacturing a pulverized material according to claim 11 , wherein, in the cellulose-containing raw material, the cellulose content in the remaining component after subtracting water from the said cellulose-containing raw material is 20% or more by mass, and the said cellulose-containing raw material is the cellulose-containing raw material whose cellulose I-type crystallinity index shown by the following calculation equation (1) is more than 33%, provided that, in the equation, I 22.6 shows the diffraction intensity in the lattice plane (002 plane) where the diffraction angle 2θ=22.6° of the cellulose I-type crystal in the X-ray diffraction, and I 18.5 shows the diffraction intensity of the amorphous portion where the diffraction angle 2θ=18.5°
Cellulose I -type crystallinity index (%)={( I 22.6 −I 18.5 )/ I 22.6 }×100  (1).

13. The method for manufacturing a pulverized material according to claim 11 , wherein the pulverized material obtained by the pulverizing treatment of the cellulose-containing raw material is the pulverized material whose cellulose I-type crystallinity index shown by the calculation equation (1) is 33% or less.

14. The method for manufacturing a pulverized material according to claim 10 , wherein content of water in the biomass raw material is in the range of 0.2 to 4.5% by mass.

15. The method for manufacturing a pulverized material according to claim 1 , wherein the ratio of an inner diameter of the cylindrical medium in contact with the pulverizing medium to an outer diameter of the pulverizing medium is 500 or less.

16. The method for manufacturing a pulverized material according to claim 1 , wherein the integrated value of volumes of the pulverizing media relative to the space volume inside the cylindrical medium in contact with the pulverizing medium is 91% or less.

17. The method for manufacturing a pulverized material according to claim 1 , wherein the cylindrical medium is divided in the direction of the axis.

18. The method for manufacturing a pulverized material according to claim 17 , wherein the division distance of the cylindrical medium is in the range of 3 to 100 mm.

19. The method for manufacturing a pulverized material according to claim 1 , wherein, in the pulverizing treatment process of the raw material to be pulverized by vibrating the container, the vibration frequency of the container is in the range of 8 to 35 Hz.

20. A vibration mill, wherein the said vibration mill is provided with:
a container having therein a columnar space with a central axis of the columnar space being disposed so as to be almost horizontal while the container being held so as to be vibratable in a direction of within a plane that is almost perpendicular to the said central axis,
a cylindrical medium disposed in the container so as to be vibratable, and
a plurality of pulverizing media disposed inside the cylindrical medium so as to be vibratable; and in the said vibration mill,
the ratio of an inner diameter of the cylindrical medium in contacted with the pulverizing medium to an outer diameter of the pulverizing medium is 2.1 or more, and
the integrated value of volumes of the pulverizing media is more than 25% relative to a space volume inside the cylindrical medium in contacted with the pulverizing medium.

Assignees

• Uematsu Takafumi
• Wada Tomoya
• Osaki Kazutomo
• Nojiri Naoki
• Kao Corp

Inventors

• Uematsu Takafumi
• Wada Tomoya
• Osaki Kazutomo
• Nojiri Naoki

Classifications

• C08B37/003

  Chitin, i.e. 2-acetamido-2-deoxy-(beta-1,4)-D-glucan or N-acetyl-beta-1,4-D-glucosamine; Chitosan, i.e. deacetylated product of chitin or (beta-1,4)-D-glucosamine; Derivatives thereof · CPC title

• B02C17/14 Primary

  Mills in which the charge to be ground is turned over by movements of the container other than by rotating, e.g. by swinging, vibrating, tilting {(mills provided with vibrators in general B02C19/16)} · CPC title

• B02C17/20

  Disintegrating members · CPC title

• C08L1/02

  Cellulose; Modified cellulose · CPC title

• C08L5/08

  Chitin; Chondroitin sulfate; Hyaluronic acid; Derivatives thereof · CPC title