Process and apparatus for refining sand
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United States of America Patent
Stats
-
Jun 5, 2018
Issued Date -
N/A
app pub date -
Aug 24, 2017
filing date -
Oct 8, 2014
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A process for refining sand for use as frac sand includes the steps of passing the sand through a first fines separation stage to remove fine particles of contaminant from the sand, reducing the water content of the sand (such as to less than 20%), passing the sand into an attrition scrubber unit containing moving blades to delaminate clay and other contaminants from the sand grains, passing the sand from the attrition scrubber unit through a second fines separation stage to separate fine contaminants from the sand, and dewatering the resulting sand product in a further dewatering stage.
First Claim
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International Classification(s)
- 2017 Application Filing Year
- B03B Class
- 88 Applications Filed
- 68 Patents Issued To-Date
- 77.28 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 1 Citation Count
- B03B Class
- 44.44 % 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 | Dec 5, 2025 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Dec 5, 2029 |
