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:
Jul. 11, 1995
Filed:
Mar. 22, 1993
Applicant:
Inventor:
Norio Kawata, Kanagawa, JP;
Assignee:
Japan Tobacco, Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; C01D / ;
U.S. Cl.
CPC ...
159 471 ; 159 44 ; 2329 / ; 203-1 ; 423158 ; 423184 ; 423497 ;
Abstract
An evaporator control method for a salt manufacturing plant includes the steps of: measuring the speed of sound of in a raw solution of salt which additionally includes magnesium chloride and calcium chloride accommodated in an evaporator; calculating the combined concentration of magnesium chloride and calcium chloride according to the speed of sound based on a calibration curve; and controlling a condition of the raw solution in the evaporator according to the combined concentration of magnesium chloride and calcium chloride.