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:
Aug. 09, 1988
Filed:
Feb. 12, 1987
Klaus Beltz, Budenheim, DE;
Klaus Frankenfeld, Hunfelden, DE;
Peter Ruschke, Budenheim, DE;
Gerhard Eich, Ingelheim, DE;
Chemische Fabrik Budenheim Rudolf A. Oetker, Budenheim, DE;
Abstract
Disclosed is a process for the precipitation and separation of cadmium sulphide from the raffinates derived from phosphoric acid purification by treating the cadmium containing streams of the raffinates with a H.sub.2 S containing solvent phase in a mixing-settling apparatus, by separating the raffinate phase from the cadmium sulphide containing solvent phase and by separating the precipitated cadmium sulphide from the solvent phase. By operating this process it is possible to remove cadmium in a simple manner from the raffinates since their inherent properties don't influence the precipitation and separation of cadmium sulphide.