The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 15, 2005
Filed:
Jul. 14, 2003
Max E. Ramey, Rifle, CO (US);
John S. Mcewan, Parachute, CO (US);
Kevin L. Green, Parachute, CO (US);
Charles L. Yates, Parachute, CO (US);
Allan L. Turner, Lakewood, CO (US);
Michael A. Rockendal, Danville, CA (US);
Irvin P. Nielsen, Rifle, CO (US);
Michael P. Hardy, Grand Junction, CO (US);
Rex Goodrich, Grand Junction, CO (US);
Max E. Ramey, Rifle, CO (US);
John S. McEwan, Parachute, CO (US);
Kevin L. Green, Parachute, CO (US);
Charles L. Yates, Parachute, CO (US);
Allan L. Turner, Lakewood, CO (US);
Michael A. Rockendal, Danville, CA (US);
Irvin P. Nielsen, Rifle, CO (US);
Michael P. Hardy, Grand Junction, CO (US);
Rex Goodrich, Grand Junction, CO (US);
American Soda, LLP, Parachute, CO (US);
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.