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:
Jan. 28, 1986
Filed:
Apr. 27, 1984
Louis Cognet, Le Vesinet, FR;
Christian Argoud, Vaulx en Velin, FR;
Francois Matray, Heyrieux, FR;
Joel Mallevialle, Carrieres sur Seine, FR;
Societe Lyonnaise des Eaux et de l'Enclairage, Paris, FR;
Abstract
An apparatus for carrying out a liquid-liquid extraction process by co-current contact between an extraction liquid and a liquid from which impurities are to be extracted includes a mixing compartment in the form of a vertical column having an open lower end and equipped in its interior and substantially throughout its length with a rotary element having surfaces extending perpendicularly or obliquely to the axis of the element. The open lower end of the column extends into a settling compartment in the form of a leak-proof container provided with means for determining the level of the extraction liquid in the container. The extraction liquid is recycled from the container by being converted to a gas and then reintroduced into the column. Compressed air is controlled electronically to supply make-up extraction liquid and any necessary reagents into the settling container to ensure that the level of the extraction liquid is maintained constant.