System and methods for removing impurities from phosphogypsum and manufacturing gypsum binders and products
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United States of America Patent
Stats
-
Jan 16, 2018
Issued Date -
N/A
app pub date -
Apr 2, 2015
filing date -
Apr 2, 2014
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Methods and systems that remove impurities from phosphogypsum (PG), including from radium and heavy metal salts, and produce gypsum binders and products. In one embodiment, PG is reacted with a chloride solution in an acidic environment under mechanical manipulation and/or heat followed by galvanic and/or zeolite absorption removal of impurities.
First Claim
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International Classification(s)
- 2015 Application Filing Year
- C01F Class
- 217 Applications Filed
- 164 Patents Issued To-Date
- 75.58 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 1 Citation Count
- C01F Class
- 37.50 % this patent is cited more than
- 7 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Jul 16, 2025 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Jul 16, 2029 |
