Chemistry of inorganic compounds – Carbon or compound thereof – Oxygen containing
Reexamination Certificate
2006-10-31
2006-10-31
Bos, Steven (Department: 1754)
Chemistry of inorganic compounds
Carbon or compound thereof
Oxygen containing
C423S426000, C423S206200
Reexamination Certificate
active
07128886
ABSTRACT:
A method for solution mining nahcolite, capable of extracting nahcolite from geological formations lean in nahcolite comprising injecting high pressure water (which may include recycled aqueous solution of bicarb and sodium carbonate) at a temperature of at least 250° F. into the formation, dissolving nahcolite in the hot water to form a production solution and recovering the production solution. The invention also includes the processing of the production solution to provide sodium carbonate and, optionally, sodium bicarbonate, comprising: decomposing the sodium bicarbonate portion of the hot aqueous production solution to form a hot aqueous solution of sodium carbonate; evaporating water from the hot aqueous solution comprising sodium carbonate to form a concentrated solution of sodium carbonate; producing sodium carbonate monohydrate from the concentrated solution of sodium carbonate by crystallization; and dewatering and calcining the sodium carbonate monohydrate to produce anhydrous sodium carbonate.
REFERENCES:
patent: 3779602 (1973-12-01), Beard et al.
patent: 5283054 (1994-02-01), Copenhafer et al.
patent: 6228335 (2001-05-01), Copenhafer et al.
Goodrich Rex
Green Kevin L.
Hardy Michael P.
McEwan John S.
Nielsen Irvin P.
Bos Steven
Brinks Hofer Gilson & Lione
Solvay Chemicals, Inc.
LandOfFree
Sodium carbonate and sodium bicarbonate production from... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Sodium carbonate and sodium bicarbonate production from..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sodium carbonate and sodium bicarbonate production from... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3635653