![]() Method of gallium extraction from aqueous strong alkalinous solution of sodium aluminate
专利摘要:
1. A method of recovering the gallium contained in an aqueous solution of highly alkaline sodium aluminate by exchange of chemical species between a stationary phase consisting of a microporous adsorbent resin impregnated with a 7-alkenyl 8-hydroxy quinoline charge and the aqueous phase of sodium aluminate characterised by the fact that prior to impregnation the dry resin 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 of between 8.0 and 50.0 nm with at least 80% of this volume consisting of pores of a diameter comprised between 4.0 and 500.0 nm, an expansion rate in an aqueous medium not exceeding 20%, and in that it is impregnated with 7-alkyl or alkenyl 8-hydroxy in a proportion of 250 to 350 g per litre of dry resin. 公开号:SU1637665A3 申请号:SU874203493 申请日:1987-10-22 公开日:1991-03-23 发明作者:Ламеран Жан-Мишель 申请人:Алюминиюм Пешинэ (Фирма); IPC主号:
专利说明:
This invention relates to metallurgy, in particular, to the recovery of gallium from aluminate solutions manufactured by Bayer. The purpose of the invention is to increase the degree of gallium extraction directly from Bayer solutions. Example 2.9 l of Amberlite XAD 1180 resin dried in a cabinet at 80 ° C to constant weight. This resin is contacted with a solution of 7- (5,5,7,7-tetramethyl-1-octene-3-yl) -8-oxoquinoline (TMOOH) in alcohol, preferably in ethanol, to concentrations of 15-30 wt.% of this compound in ethanope. In this case, this value is 15% by weight. The amount of impregnation solution is calculated so that the ratio of extractant to the volume of dry resin is 250-350 g per liter. In this example, this value is 275 g / l0. This operation can be carried out in one or several successive stages with intermediate drying at 60 ° C under vacuum, which allows the removal of ethanol and control. 00 one with OE ate s To add the amount of adsorbed extractant. After the last drying under vacuum, the resin is impregnated with deionized water, degassed under vacuum, then loaded into a column. The pore volume of the resin used is 1500 mm3 / g dry resin, the average pore diameter is 80-500 X, with at least 80% of the pore volume formed by pores with a diameter of 40-5000 A. The degree of swelling of the resin in an aqueous medium does not exceed 20%. The mass obtained after impregnation corresponds to the fixation of almost the entire TMOOX. The volume of resin in the column is 3.2 liters with a layer height of 30 cm. 80 liters of Bayer liquid, containing 80-140 g / l of sodium hydroxide, 60-110 g / l of alumina and 150-350 mg / l of gallium, with a temperature of 40 ° C is passed through the resin at a rate of 20 l / h o The content in the gallium solution is at the beginning of the process when entering the column 240 and 90 mg / l at the end of the process. After washing the resin with 6 liters of water, 4.3 n sulfuric acid solution is passed through the column at a flow rate of 20 l / h for 30 minutes. The maximum concentration of gallium in a solution of sulfuric acid after passing through the resin is 6.8 g / l in 3.2 l of solution. Analysis of the solutions obtained shows that the resin fixes 3.75 g of gallium per liter of resin in the column. Thus, the proposed method allows the extraction of gallium directly from Bayer production solutions. 5 0 S five
权利要求:
Claims (2) [1] 1. A method for extracting gallium from a highly alkaline aqueous solution of sodium aluminate, comprising contacting, at 40-60 ° C, a solution of sodium aluminate containing gallium with a microporous adsorption resin impregnated with 7-alkyl- or 7-alkenyl-8-oxyquinoline organic reagent in a diluent , and the subsequent elution of gallium with a solution of sulfuric acid, characterized in that, in order to increase the degree of gallium recovery, from solutions of Eyyer production, the contacting of the gallium-containing solution is carried out with a non-polar and hydrophobic polystyrene-based resin with a specific surface area of 450 mg / l, with a pair volume of at least 1500 mm3 per 1 g of resin, with an average pore diameter of 80-500 A, 80% of the pore volume is pores with a diameter of 40-5000 A with an expansion coefficient in an aqueous medium of not more than 20% by volume, using 7- (5,5,7,7-tetramethyl-1-octene) as an organic reagent during impregnation -3-yl) -8-hydroxyquinoline in the amount of 250-350 g per 1 liter of dry resin, diluted 10-30% ethanol, and gallium is extracted from Bayer solutions containing 80-140 g / l of sodium hydroxide, 60-110 g / l of alumina and 150-350 mg / l of gallium at a ratio of Bayer initial solution and resin 2-10: 1. [2] 2. A method according to claim 1, characterized in that the elution is carried out at a concentration of sulfuric acid of 3-6 N. when the ratio of the volumes of solution of sulfuric acid and resin 2-10: 1.
类似技术:
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同族专利:
公开号 | 公开日 GR3000806T3|1991-11-15| YU193087A|1989-02-28| JPH0438453B2|1992-06-24| DE3762885D1|1990-06-28| FR2605646A1|1988-04-29| US5424050A|1995-06-13| HU200802B|1990-08-28| AU8007287A|1988-04-28| FR2605646B1|1989-04-21| JPS63123439A|1988-05-27| AU591354B2|1989-11-30| YU45043B|1991-06-30| ES2015319B3|1990-08-16| BR8705694A|1988-05-31| CN87106967A|1988-05-11| EP0265356B1|1990-05-23| IE60593B1|1994-08-10| EP0265356A1|1988-04-27| HUT45567A|1988-07-28| CN1010595B|1990-11-28| CA1332109C|1994-09-27| IE872850L|1988-04-24|
引用文献:
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申请号 | 申请日 | 专利标题 FR8615362A|FR2605646B1|1986-10-24|1986-10-24|EXTRACTION OF GALLIUM FROM BAYER LIQUORS USING AN IMPREGNATED ADSORBENT RESIN| 相关专利
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