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:
Nov. 12, 2002
Filed:
Sep. 11, 1998
Applicant:
Inventors:
Dale Lee Denham, Jr., Arvada, CO (US);
Rudolph Pruszko, Green River, WY (US);
Wayne C. Hazen, Denver, CO (US);
Assignee:
Environmental Projects, Inc., Casper, WY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01D 7/00 ; C22B 2/610 ;
U.S. Cl.
CPC ...
C01D 7/00 ; C22B 2/610 ;
Abstract
A process for the production of sodium carbonate monohydrate is disclosed. The process includes heating a feed stream containing trona and insoluble impurities in a calcining apparatus to a temperature of less than about 350° C. to form anhydrous sodium carbonate. The anhydrous sodium carbonate is contacted with a saturated sodium carbonate brine solution to form sodium carbonate monohydrate crystals. Sodium carbonate monohydrate crystals are separated from insoluble impurities.