Ratio of starting raw material and fluorinating agent in the process of purifying silica-containing raw material

The influence of NH 4 HF 2 fluorinating agent on the yield of ammonium hexafluorosilicate intermediate product and amorphous silica in the fine purification of silica-containing raw material by the fluoride technology has been studied. Mixtures with different fluorinating agent contents were investi...

Full description

Saved in:
Bibliographic Details
Published in:Theoretical foundations of chemical engineering 2012-07, Vol.46 (4), p.368-372
Main Authors: Demyanova, L. P., Zaeva, A. S.
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Industrial Chemistry/Chemical Engineering
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The influence of NH 4 HF 2 fluorinating agent on the yield of ammonium hexafluorosilicate intermediate product and amorphous silica in the fine purification of silica-containing raw material by the fluoride technology has been studied. Mixtures with different fluorinating agent contents were investigated by synchronous thermal analysis. The determination of the phases of intermediate products at various ratios of starting silica-containing raw material and NH 4 HF 2 was carried out by the X-ray phase analysis method. The optimal ratio of components for the preparation of ammonium hexafluorosilicate and amorphous silica with maximal yield and purity level of the final products was determined.
ISSN:0040-5795
1608-3431
DOI:10.1134/S0040579512040100