Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Novartis AG
BASF Schweiz AG
Original Assignee
Ciba Geigy AG
Ciba AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ciba Geigy AG, Ciba AGfiledCriticalCiba Geigy AG
Publication of ES233436A1publicationCriticalpatent/ES233436A1/en
Process for the separation of niobium and tantalum, characterized in that materials containing niobium and tantalum are transformed into oxidized form, particularly minerals containing niobium and tantalum which have been subsequently treated for the purpose of enrichment, or mixtures of oxides of these two metals, with chlorine gas and a reducer in a mixture of chlorination products that contain preponderant or exclusively niobium such as oxychloride and tantalum as pentachloride and because this mixture is subjected to fractional condensation, or it is dissociated by sublimation into fractions. (Machine-translation by Google Translate, not legally binding)
ES0233436A1956-02-061957-02-05Procedure for the separation of niobio and tantalio (Machine-translation by Google Translate, not legally binding)
ExpiredES233436A1
(en)
Procedure for the separation of impurities from dilute gas containing acetylene or acetylene and ethylene. (Machine-translation by Google Translate, not legally binding)
Procedure to separate chlorine mixtures and sulfurous anhydride that, eventually, can carry air. (Machine-translation by Google Translate, not legally binding)