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:
Jun. 13, 1995
Filed:
Apr. 13, 1993
Jean-Michel Lamerant, Bouc Bel Air, FR;
Rhone-Poulenc Chimie, Courbevoie Cedex, FR;
Abstract
The invention also relates to a method of recovering the gallium contained in an aqueous solution of strongly alkaline sodium aluminate by chemical exchange between a stationary phase consisting of a microporous adsorbent resin impregnated with 7-(alkyl or alkenyl)-8-hydroxyquinoline and the aqueous phsae of sodium aluminate. According to the invention, the dry resin prior to its impregnation has a specific surface area measured by the BET method which is at least equal to 450 sq.m/g of resin, a pore volume at least equal to 1500 cu.mm/g of resin, a mean pore diameter comprised between 80 and 500 .ANG. with at least 80% of this volume consisting of pores with a diameter comprised between 40 and 5000 .ANG., a rate of expansion of swelling in an aqueous medium which does not exceed 20% and in that it is impregnated with 7-(alkyl or alkenyl)-8-hydroxyquinoline in the proportion of 250 to 350 g/liter of dry resin.