granulate

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United States of America Patent

PATENT NO 9902621
SERIAL NO

14397484

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Abstract

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The invention relates to a process for producing SiO2 granules by freezing and re-thawing an SiO2 suspension, wherein a separation of liquid and sediment composed of agglomerated SiO2 particles occurs in the course of thawing, the liquid removed is decanted and the residual moisture in the sediment is removed by a drying step with formation of the SiO2 granules. According to the invention, an auxiliary comprising alkali metal-free bases in the form of nitrogen hydrides is added to the suspension to set the pH greater than 7.

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Patent Owner(s)

Patent OwnerAddress
HERAEUS QUARZGLAS GMBH & CO KGQUARZSTRASSE 8 HANAU 63450

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Langner, Andreas Freigericht, DE 22 162
Schoetz, Gerhard Aschaffenburg, DE 11 56
Such, Mario Graefenhainichen, DE 7 48

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