Method for producing nanometer lithopone from electrolytic zinc acid leaching residue
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 24, 2016
Grant Date -
Aug 6, 2015
app pub date -
Sep 25, 2012
filing date -
Sep 25, 2012
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Disclosed is a method for producing nanometer lithopone from electrolytic zinc acid leaching residue. The method comprises specific steps of: leaching, purifying, carrying out a metathetical reaction, washing, smashing and the like. Through these steps, zinc is selectively leached out by an ammonia-ammonium sulfate process; and iron and arsenic are removed by ammonium persulfate, heavy metal elements such as nickel, copper, lead, cadmium and the like are removed by sulfurization method and zinc powder replacement method; and a metathetical reaction is carried out to obtain an nZnS—BaSO4 crystalline filter cake, the crystalline filter cake is dried and smashed to obtain a nanometer lithopone product. The zinc in the acid leaching residue can be recycled effectively by this method. The ammonia leaching method is used as the technical means of effectively treating the acid leaching residue, the obtained lithopone product is good in quality, and sulfate radicals needed in the production are provided by the acid leaching residue itself, so that the resource utilization of the acid leaching residue is implemented; and in addition, the production cost is low, and the operation is simple.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
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