Treatment of gas well production wastewaters
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Nov 4, 2014
Grant Date -
Feb 28, 2013
app pub date -
Aug 31, 2011
filing date -
Aug 31, 2011
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A method of treating a wastewater is provided and can be used, for example, to treat a gas well production wastewater to form a wastewater brine. The method can involve crystallizing sodium chloride by evaporation of the wastewater brine with concurrent production of a liquor comprising calcium chloride solution. Bromine and lithium can also be recovered from the liquor in accordance with the teachings of the present invention. Various metal sulfates, such as barium sulfate, can be removed from the wastewater in the production of the wastewater brine. Sources of wastewater can include gas well production wastewater and hydrofracture flowback wastewater.
First Claim
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International Classification(s)
- 2011 Application Filing Year
- C09K Class
- 1857 Applications Filed
- 1322 Patents Issued To-Date
- 71.20 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 13 Citation Count
- C09K Class
- 71.41 % this patent is cited more than
- 11 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | May 4, 2026 |
