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:
Jun. 20, 2017
Filed:
Jan. 25, 2016
Sparstane Technologies Llc, Brimingham, AL (US);
Murray P. Hasinoff, Birmingham, AL (US);
Taylor Pursell, Mountain Brook, AL (US);
Joseph A. Saiia, Birmingham, AL (US);
Arthur R. Shirley, Jr., Florence, AL (US);
Keith D. Cochran, Killen, AL (US);
Timothy G. Holt, Florence, AL (US);
Joseph M. Miller, Killen, AL (US);
Melissa C. Hayes, Florence, AL (US);
SPARSTANE TECHNOLOGIES LLC, Birmingham, AL (US);
Abstract
The present invention includes a partially continuous countercurrent process for converting gypsum, by reaction with ammonium carbonate, to products of ammonium sulfate and calcium carbonate by introducing the reactants into reactors, mixing the reactants for a predetermined amount of time, employing a novel combination of countercurrent flows coupled with the reactors operated in a batch manner with process recycle of liquids, removing materials from the reactor and separating solids from solutions wherein no reactants are added during the removal process and thus the reactants have sufficient time to react and ensure the desired degree of reaction, yield and purity of product calcium carbonate and ammonium sulfate while minimizing the reaction time.