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:
Mar. 27, 2001
Filed:
May. 25, 1999
Applicant:
Inventors:
Ulrich Seseke-Koyro, Vellmar, DE;
Thomas Born, Holle, DE;
Assignee:
Solvay Fluor und Derivate GmbH, Hannover, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01B 7/19 ;
U.S. Cl.
CPC ...
C01B 7/19 ;
Abstract
Flux residues from aluminium soldering fluxes composed of alkali metal metallates, especially fluoroaluminates of the alkali metals, in particular potassium and cesium, can be recycled by adding them to the reaction mixture used for the production of hydrogen fluoride from fluorspar and sulfuric acid or oleum. In this way the fluorine content of the flux residues becomes reusable, and the anhydrite which is produced can advantageously be used for conventional purposes.