Conversion process for strontium sulfate in carbonate rich celestite ores to strontium carbonate using sodium carbonate in an air/vapor-lift loop reactor
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 12, 2000
Grant Date -
N/A
app pub date -
Nov 18, 1996
filing date -
Nov 18, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
This invention relates to a low energy hydrometallurgical process for the production of strontium carbonate of chemical and glass grade from carbonate rich celestite ores typically having around 28% combined strontianite, calcite, dolomite and other carbonates. This process avoids negative environmental impact usually associated to calcining technology and involves fewer processing stages than prior art hydrometallurgical processes. Thus, in two stages which provide: (1) the acid wash of the celestite ore in an acid medium to eliminate carbonates present other than strontium carbonates and (2) the conversion of the thus enriched celestite to strontium carbonate in an air/vapor-lift loop reactor using a sodium carbonate aqueous medium, a step permitting recovery of sodium sulfate as a by-product. Thus, an almost complete conversion of the strontium sulfate present in the enriched ore is achieved.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully