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:
Jan. 26, 2016
Filed:
May. 11, 2011
Noritoshi Tamura, Chiba, JP;
Takayuki Suzuki, Chiba, JP;
Hirokazu Otani, Saitama, JP;
Taiheiyo Cement Corporation, Tokyo, JP;
Abstract
In accordance with the present invention, there is provided a calcium removal method capable of reducing operation cost. A solution Lcontaining potassium or/and sodium, and calcium is passed through an ion-exchange resinto separate the solution into a solution containing potassium or/and the sodium, and a solution containing calcium. Operation cost can remarkably be decreased since potassium carbonate is not required to remove calcium as before. Timing for changing a calcium-containing water Land a salt water Ldischarged from the ion-exchange resin can be performed based on at least one measurement result selected from the group consisting of: a calcium or chlorine concentration; electrical conductivity; and pH of a fluid which is discharged from said ion-exchange resin. The solution may be a filtrate Lthat is obtained by washing a chlorine bypass dust D generated in a cement burning process, or a leachate W of a final disposal site