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:
Aug. 02, 1977
Filed:
Jun. 17, 1975
Alan B Gancy, Syracuse, NY (US);
Rustom P Poncha, Syracuse, NY (US);
Allied Chemical Corporation, Morris Township, NJ (US);
Abstract
In the process for making sodium carbonate from trona, the soluble silicate content of crystallizer mother liquor from which sodium carbonate precursor crystals are obtained by evaporative crystallization is reduced by digesting the mother liquor at elevated temperature in the presence of certain activated insolubles, followed by separating the insolubles from the digested mother liquor. These activated insolubles are obtained by calcining crushed trona, dissolving the calcined trona in an aqueous medium to obtain a solution of sodium carbonate containing insolubles, separating the insolubles and activating them by calcination at elevated temperature.