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:
Apr. 24, 1979
Filed:
Jun. 17, 1975
Applicant:
Inventors:
Rustom P Poncha, Syracuse, NY (US);
Alan B Gancy, Syracuse, NY (US);
Assignee:
Allied Chemical Corporation, Morris Township, Morris County, NJ (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01D / ;
U.S. Cl.
CPC ...
4232 / ; 423208 ;
Abstract
A method for dissolving calcined trona containing calcareous impurities, to obtain an aqueous sodium carbonate solution having low calcium content involves contacting calcined trona in countercurrent flow, desirably under specific temperature conditions, with dilute sodium carbonate solution. Sodium carbonate solutions thus obtained have reduced tendency to form calcium deposits in processing equipment.