Particulate amorphous precipitated silica

Details Particulate amorphous precipitated silica Particulate amorphous precipitated silica

1993-02-16

1994-10-11

Cain, Edward

Solid material comminution or disintegration

Processes

Miscellaneous

241235, B02C 408

Patent

active

053539990

ABSTRACT:
A statistically large population of particles of amorphous precipitated silica is substantially free of particles of amorphous precipitated silica which are retained on a 20 mesh sieve screen, and is characterized by at least 90 percent by weight of said particles of said population being retained on a 200 mesh sieve screen. Such a population may be produced by cracking amorphous precipitated silica particles between the textured rolls of at least one roll pair.

REFERENCES:
patent: 3622083 (1971-11-01), Greenwald et al.
patent: 3738785 (1973-06-01), Reinhardt et al.
patent: 3762851 (1973-10-01), Reinhardt et al.
patent: 4807819 (1989-02-01), Kreher
"Precision Particle Reduction Equipment", Modern Process Equipment, Inc. Form 591-Jay.
"Series IMD 1042/1052 Cracking/Grinding Roll Mills", Modern Process Equipment, Inc. Date unknown.
Fischer Scientific 81, Complete Chemical Catalog, "FISHERbrand* U.S. Standard Sieves", p. 1083.
Handbook of Chemistry, 8th Ed., Handbook Publishers, Inc. Sandusky, Ohio, 1952, pp. 877-879.
CRC Handbook of Chemistry and Physics, 65th Ed., CRC Press, Inc., Boca Raton, Florida, 1984, p. F-110.

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