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:
Apr. 23, 1991
Filed:
Oct. 24, 1989
Norsk Hydro a.s., Oslo, NO;
Abstract
The present invention relates to a method for clarifying aqueous salt solutions containing inorganic insolubles and possibly also organic components. Air is introduced into a recirculating system for the aqueous solution, pressurized and then released, thus forming microbubbles in the solution. Fluocculants are added and the presence of foam forming organic components is ensured. The foam formed is back-mixed into the solution while dissolved air flotation is interrupted, whereupon it may be restarted for flotation of possible remaining contaminants. The foam forming process can be performed in the presence of surfactants, wax and/or oil for forming a stable foam to be back-mixed into the solution for releasing entrapped microbubbles thereto. The method can be carried out by continuously supplying flocculant and solution to the flotation vessel. Dissolved air flotation and back-mixing are then carried out sequentially.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile