Patents by Inventor Svend Aage Markland

Svend Aage Markland has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for the recovery of tantalum and/or niobium from acid solutions thereof
    Patent number: 3976475
    Abstract: The invention is concerned with the recovery and separation of tantalum and/or niobium from a solution of these elements in aqueous mineral acid, preferably sulfuric acid. The element or elements is/are extracted from the acid solution thereof by means of an amine, preferably a tertiary, long-chained alkyl amine, in the presence of hydrogen peroxide and of fluoride ions. Thereby the extraction and separation can be performed effectively at comparatively low acid concentration, normally below a concentration of 4N.
    Type: Grant
    Filed: August 20, 1975
    Date of Patent: August 24, 1976
    Assignee: Atomenergikommissionen
    Inventor: Svend Aage Markland