[54] PROCESS AND AN APPARATUS FOR
PRODUCING FINELY DIVIDED SOLIDS
DISPERSIONS
[75] Inventors: Peter Roger Nyssen, Dormagen;
Klaus-Wilfried Wanken, Leverkusen;
Bernd Klinksiek, Gladbach, all ol
Germany
[73] Assignee: Bayer Aktiengesellschaft, Leverkusen, Germany
[21] Appl. No.: 710,991
[22] Filed: Sep. 25, 1996
[30] Foreign Application Priority Data
Oct. 2, 1995 [DE] Germany 195 36 845.2
[51] Int. CI. B02C 19/06
[52] U.S. CI 241/5; 241/16; 241/21;
241/39; 241/152.1
[58] Field of Search 241/1, 5, 16, 21,
241/39, 152.1, 171
[56] References Cited
U.S. PATENT DOCUMENTS
4,081,863 3/1978 Rees 336/176
4,186,772 2/1980 Handleman 241/5 X
4,592,302 6/1986 Motoyama et al 241/39 X
4,784,333 11/1988 Hikake et al 241/5
4,811,907 3/1989 Niemi et al 241/5
4,860,959 8/1989 Handleman 241/5 X
4,917,309 4/1990 Zander et al 241/16 X
5,111,998 5/1992 Kanda et al 241/39 X
5,129,586 7/1992 Artemjev et al 241/5
5,421,524 6/1995 Haddow 241/5
5,577,670 11/1996 Omata et al 241/5
5,628,464 5/1997 Smith et al 241/5
FOREIGN PATENT DOCUMENTS
2633288 2/1977 Germany .
2063695 6/1981 United Kingdom .
87/06854 11/1987 WIPO 241/5
Primary Examiner—-John M. Husar
Attorney, Agent, or Firm—Sprung Kramer Schaefer & Briscoe
[57] ABSTRACT
This invention relates to a process for producing finely divided dispersions of solids having an average particle size of 0.01 to 20 fim by the comminution of coarse particulate dispersions in a hole- or slit-type nozzle 4 having a specific bore length to diameter ratio at a pressure difference greater than 5 bar between the nozzle inlet and the nozzle outlet. The invention also relates to an apparatus for producing the finely divided dispersion.
11 Claims, 4 Drawing Sheets
