WO1997009115B1

WO1997009115B1 - Dispersing device and process

Info

Publication number: WO1997009115B1
Application number: PCT/DE1996/001695
Authority: WO
Filing date: 1996-09-05
Publication date: 1997-05-15

Abstract

In order to reduce the conversion and cleaning effort between pre-dispersion by a dissolver (2) and fine dispersion by an agitating ball mill (3) it is proposed to combine both devices in a container. The casing (31) of the agitating ball mill (3) is in the form of a toroidal annular channel with a central hole (34). The drive shaft (21) of the dissolver (2) runs through said central hole (34) in the agitating ball mill (3). Dispersion may take place in the dispersing device simultaneously or in succession. The agitating ball mill (3) is preferably lowered in the container (1) along the common axis after a predetermined time and caused to act on the substance (5) to be dispersed.

Claims

AMENDED CLAIMS [received at the International Bureau on 11 April 1997 (11.04.97); original claims 1-14 replaced by amended claims 1-12 (3 pages)]

1. Dispersing device comprising a container for holding and processing the material to be dispersed, a flow generating device which can be driven by a first shaft, a grinding device containing a grinding medium with a housing with openings through which the substances to be dispersed due to the flow through the produced flow generating device and a arranged in the housing and rotatable relative to this RührwerksVorrichtung, characterized in that the Strömungserzeugungs¬ device comprises means for dispersing, the Mahl device is adjustable in height relative to the flow generating device and the grinding device by means of the height adjustment in the Dispergiergut ( 5) is submersible and is completely removable from it, while the flow-generating device remains in the dispersion.

2. The dispersing device according to claim 1, wherein a first shaft passes through the housing of the grinding device.

3. A dispersing device according to claim 2, wherein the housing (31) of the grinding device is in the form of an annular channel having a central hole (34) through which the first shaft (21) extends.

4. The dispersing device according to claim 3, wherein: the housing (31) of the grinding device has an open profile, the stirring

GEÄNDERTESBUTT (Article 19) 17

Factory device by a second shaft (37) is driven and via at least one connecting web (36) passing through the open profile, with the second shaft (37) is connected and the second shaft (37) is a Hohlwel- le, the encloses first shaft (21).

5. The dispersing device according to claim 4, wherein a first and a second shaft (21 and 37, respectively) can be driven by a common motor.

6. The dispersing device according to one of claims 3 to 5, wherein a stirring device comprises at least one annular disc (35) extending coaxially with the annular channel and arranged in the annular channel.

7. Dispersing device according to one of claims 1 to 6, characterized in that the grinding device is supported on its peripheral side of rods (39), by means of which it is adjustable by a drive device relative to the flow-generating device in height, the rods such are arranged to allow the height adjustment, without hindering the Rσta- tion of the agitator device relative to the housing of the grinding device.

8. Dispersing device according to one of claims 1 to 7, d a d e r c h e c e n e c e in that the particles for dispersing are designed as a dissolver disc (22).

9. A process for the initial and fine dispersion of a fine and very finely divided, solid material in a dispersion medium in a container for receiving the Dispersieren, wherein the predispersion by means of a dissolver and the fine dispersion by means of a stirred ball mill er¬ follows, characterized in that 18

during the predispersion by the dissolver, the agitator ball mill is not brought into contact with the material to be dispersed, and after predispersing the agitator ball mill is brought into contact with the material to be dispersed in the same container for fine dispersion.

10. The process according to claim 9, wherein the fine dispersing agent further acts on the dispersion material during the fine dispersion and generates a flow through the agitator ball mill.

11. The method according to claim 9 or 10, in that the agitating ball mill is positioned and not driven above the dispersing material in the container during the predispersing and is lowered in the container for fine dispersion in the container for acting with the dispersing material.

12. The method according to claim 11, wherein the dissolver is driven by a first shaft and the agitator ball mill by a second shaft arranged coaxially to the first, wherein the first shaft extends through the central opening of a housing of the agitator ball mill designed as an annular channel. characterized ¬ net, that the agitator ball mill is lowered for fine dispersion by coaxial displacement of the second shaft relative to the first shaft.

19

ITEM DECLARATION

In the introduction to the description, the following changes will be made on the basis of the newly filed claims 1 to 12:

Page 1, paragraph 1 Adaptation to the new generic term;

Page 4, paragraph 1 Insertion of the new task, which now reads:

The object of the present invention is now to further develop the dispersing device known from the prior art in such a way that the process of interchange between pre-dispersion and fine-dispersion is simplified and the cleaning outlay is reduced.

Page 4, paragraph 2 This paragraph is deleted and replaced by a corresponding paragraph, which discloses the characterizing features of new claim 1.