Production of phosphate compounds from materials containing phosphorus and at least one of iron and aluminium
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 18, 2020
Grant Date -
Oct 18, 2018
app pub date -
Jun 25, 2018
filing date -
May 2, 2013
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A method for production of phosphate compounds comprises dissolving of a raw material comprising phosphorus, aluminium and iron, in a mineral acid. Insoluble residues from the dissolving step are separated. Iron hydroxide is added causing precipitation of phosphate compounds. The precipitated phosphate compounds are removed. The phosphate compounds are dissolved by an alkaline solution. Iron hydroxide is filtered out. Lime is added, causing precipitation of calcium phosphate. The precipitated calcium phosphate is separated. The leach solution after the separating of precipitated calcium phosphate is recycled to be used for dissolving phosphate compounds by an alkaline solution.
First Claim
Family
International Classification(s)
- C01B:NON-METALLIC ELEMENTS; COMPOUNDS THEREOF
- C05F:ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05....
- C05B:PHOSPHATIC FERTILISERS
- C01G:COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLAS....
- C01F:COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUM....
- C02F:TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE....
- [Classification Symbol]
- [Patents Count]
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