The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 27, 2018
Filed:
Apr. 25, 2013
Applicant:
Heraeus Quarzglas Gmbh & Co. KG, Hanau, DE;
Inventors:
Mario Such, Graefenhainichen, DE;
Gerhard Schoetz, Aschaffenburg, DE;
Andreas Langner, Freigericht, DE;
Assignee:
Heraeus Quarzglas GmbH & Co. KG, Hanau, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B 33/18 (2006.01); C03B 19/10 (2006.01); C03C 1/02 (2006.01);
U.S. Cl.
CPC ...
C01B 33/18 (2013.01); C03B 19/108 (2013.01); C03C 1/026 (2013.01);
Abstract
The invention relates to a process for producing SiOgranules by freezing and re-thawing an SiOsuspension, wherein a separation of liquid and sediment composed of agglomerated SiOparticles 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 SiOgranules. 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.