Process for preparation of a sprayable precipitated silicic acid

Details Process for preparation of a sprayable precipitated silicic acid Process for preparation of a sprayable precipitated silicic acid

1976-01-13

1978-06-13

Halper, Robert

Classifying, separating, and assorting solids

Precedent preparation of items or materials to facilitate...

Selective differentiation

209 1, 423335, B03B 100

Patent

active

040947718

ABSTRACT:
A silicic acid filter cake and suspension agent are fed to a container equipped with a stirrer having a peripheral speed of about 20-30 m/sec. The ratio of container diameter to stirrer diameter is about 3:1. The ratio of container diameter to level of filling is at most about 1:2. The container contains at least about 1.5 to about 2 kg of silicic acid suspension, for each 1 kg of silicic acid filter cake which is added to the container. The contents of the container is mixed while maintaining a pH of at most about 4. A portion of the resulting silicic acid suspension is drawn off from the zone of highest turbulence in the container.

REFERENCES:
patent: 1739305 (1929-12-01), Hilditch
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patent: 3172727 (1965-03-01), Burke
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patent: 3957253 (1976-05-01), Burton
Fund of Chem. Eng. Operations, Larian, Prentic Hall, Inc, 1958, p. 468.
Chem. Eng. Practice, Cremer, Watkins, Butler Woth & Co., 1965, p. 292.

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