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:
Oct. 05, 1993
Filed:
Dec. 06, 1991
Applicant:
Inventors:
Albert Pavinato, Piennes, FR;
Richard Pazdej, Maizieres-Les-Metz, FR;
Remy Nicolle, Maizieres-Les-Metz, FR;
Assignee:
Sollac, Puteaux, FR;
Primary Examiner:
Int. Cl.
CPC ...
C02F / ; C02F / ; C02F / ;
U.S. Cl.
CPC ...
423138 ; 4231503 ; 423324 ; 423D / ;
Abstract
This process in which the used bath is recycled after concentration at (1) by elimination of water at (2), followed by a treatment for recovering iron oxides at (10), is characterized in that it comprises carrying out a tangential microfiltration at (5) of the concentrated bath so as to separate therefrom the silicon compounds in the non-ionic form and thereby concentrate them, and recirculating the major part of the fraction of this bath (11-17) containing these concentrated silicon compounds so as to promote the precipitation of the non-ionic compounds of the silicon.