Methylene rhodanine reagent and application thereof in solid phase extraction of platinum
A solid-phase extraction column and methylene technology, applied in the field of methylene rhodanine reagents and its application in platinum solid-phase extraction, can solve the problems that cannot be reused many times, are not resistant to acid and alkali, and are practically used Restrictions and other issues, to achieve the effect of easy operation automation, low cost, and easy emulsification
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Embodiment 1
[0030] Example 1:The used solid-phase extraction small column is 10 mm * 10 mm, packing (attached the MCI-GEL reverse phase microporous resin of DMBR reagent described in the present invention) 1.2 g; The liquid to be extracted is hydrochloric acid, sodium chlorate of waste circuit board The concentration of platinum in the leaching solution is 5.21 mg / L, the pH of the solution is adjusted to 2.0, and the column is passed through the column at a flow rate of 20 mL / min with a column volume of 1.2 L. After enrichment, wash with 5.0 mL of 1% thiourea in the reverse direction Platinum enriched on the column. Under this condition, the enrichment factor can reach 240 times, and the recovery rate of platinum can reach 95.2%. The platinum in the eluent is smelted and recovered by conventional methods.
Embodiment 2
[0031] Example 2: The solid-phase extraction column used is: 10 mm × 10 mm, packed with 1.2 g of filler (MCI-GEL reversed-phase microporous resin loaded with DMBR reagent of the present invention); The concentration was 1.2 mg / L, the pH was adjusted to 1.5, and the column volume was 4.0 L. After enrichment, 5 mL of 1.5% thiourea was used to elute the enriched platinum on the small column in the reverse direction. Under this condition, the enrichment factor can reach 800 times, and the recovery rate of platinum can reach 93.2%. The platinum in the eluent is smelted and recovered by conventional methods.
Embodiment 3
[0032] Example 3: The solid-phase extraction column used is: 10 mm × 10 mm, filled with filler (1.2 g of MCI-GEL reversed-phase microporous resin loaded with DMBR reagent of the present invention; the liquid to be extracted is platinum ore leaching liquid, containing platinum 15.4 mg / L, the pH was adjusted to 2.2; the solution was passed through the column at a flow rate of 15 mL / min, and the column volume was 1.5 L. After enrichment, 5 mL of 0.8% thiourea was used to elute the enriched platinum on the small column in the reverse direction. Under the conditions, the enrichment factor can reach 300 times, and the recovery rate of platinum can reach 94.4%. The platinum in the eluent can be smelted and recovered by conventional methods.
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Abstract
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