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. 05, 2013
Filed:
Nov. 12, 2008
Method of decarbonation and its use in producing crystalline sodium sulfite or other alkali products
Jim Kisielewski, Green River, WY (US);
Donald M. Robertson, Green River, WY (US);
Robert N. Skogley, Missoula, MT (US);
Jim Kisielewski, Green River, WY (US);
Donald M. Robertson, Green River, WY (US);
Robert N. Skogley, Missoula, MT (US);
Solvay Chemicals, Inc., Houston, TX (US);
Abstract
A sodium sulfite liquor is formed by reacting sodium carbonate with sulfur dioxide. A CObyproduct may be removed from the formed liquor by injecting a stripping gas (e.g., steam and/or air) into the liquor, either into a transfer pipe or into a tank that is vented; by increasing the liquor temperature; and/or by reducing the liquor pressure. The decarbonated sodium sulfite liquor with a reduced carbon dioxide content is introduced into a crystallizer connected to a circulation loop comprising a heater and/or a filter. Additional decarbonation by heating, stripping and/or depressurization of the liquor may be carried out in a circulation loop connected to the crystallizer. The condensing side of the heater may be vented. The flow rate of the circulation loop and/or heater temperature differences may be monitored. Additional COmay be vented from a holding tank to maintain circulation loop flows and heater temperature differences.