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:
Feb. 09, 1993
Filed:
Mar. 26, 1991
Applicant:
Inventors:
Bror G Nyman, Ulvila, FI;
Stig-Erik Hultholm, Pori, FI;
Launo L Lilja, Pori, FI;
Valto J Makitalo, Pori, FI;
Assignee:
Outokumpu Oy, Espoo, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; B01F / ;
U.S. Cl.
CPC ...
210634 ; 210511 ; 210513 ; 210801 ; 210D / ; 366292 ; 366320 ; 366348 ; 422228 ; 422229 ; 422259 ;
Abstract
A method and apparatus for mixing two different phases in a liquid-liquid extraction process and for separating the phases employs a spiral stirrer having two tubular coils for creating homogeneous circulation throughout a mixer. The stirrer rotates at a relatively slow speed to create an upward flow from bottom to top of the mixer near the mixer periphery and a downward flow in the middle of the mixer. The mixer has a flow reversing profile ring and is designed to prevent aeration and formation of an emulsion.