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:
Jan. 12, 2010
Filed:
Apr. 26, 2004
Victor E. Braman, Green River, WY (US);
Marco A. Cortes, Green River, WY (US);
Falcon A. Price, Green River, WY (US);
Stephen T. Gaddis, Green River, WY (US);
Todd M. Lessard, Green River, WY (US);
James M. Shepard, Wilmington, DE (US);
Derral W. Smith, Green River, WY (US);
Victor E. Braman, Green River, WY (US);
Marco A. Cortes, Green River, WY (US);
Falcon A. Price, Green River, WY (US);
Stephen T. Gaddis, Green River, WY (US);
Todd M. Lessard, Green River, WY (US);
James M. Shepard, Wilmington, DE (US);
Derral W. Smith, Green River, WY (US);
General Chemical Industrial Products, Inc., East Hanover, NJ (US);
Abstract
A process is described for recovering sodium carbonate or other sodium-based chemicals from sodium-bearing streams, including in particular mine water, evaporative pond water and sodium carbonate decahydrate deposits, recycle and purge streams, and other waste streams. In the process sodium bicarbonate-bearing streams are decarbonized to reduce the sodium bicarbonate concentration in a combination with other sodium-bearing streams, resulting in a liquor suitable as feed to a sodium carbonate decahydrate or sodium carbonate monohydrate process. The sodium bicarbonate stream is combined in a mix tank with other sodium carbonate bearing streams where the concentration is adjusted to form a liquor suitable to feed a sodium decahydrate or sodium carbonate monohydrate evaporation/crystallization step. In the process the combination of the various sodium-bearing streams is decarbonized to below 3.5% sodium bicarbonate when fed to a sodium decahydrate process and to below 1% sodium bicarbonate when fed to a sodium carbonate monohydrate process. The feed streams are adjusted in sodium carbonate concentration by higher concentrated sodium carbonate-bearing streams or by addition of sodium carbonate decahydrate produced from said streams or recovered form evaporation pond deposits, are then processed to produce sodium carbonate decahydrate or sodium carbonate monohydrate or further processed to form other sodium carbonate salts.