Platinum-absorbing modified carbon fiber containing organic chelating group as well as preparation method and application of platinum-absorbing modified carbon fiber

Abstract

The invention discloses a platinum-absorbing modified carbon fiber containing an organic chelating group and a preparation method and application of the platinum-absorbing modified carbon fiber, the platinum-absorbing modified carbon fiber comprises a carbon fiber and the organic chelating group bonded to the carbon fiber, and the organic chelating group is a platinum-absorbing organic chelating group. The platinum-absorbing organic chelating group is mainly obtained by condensation reaction of an active group and an amino-containing organic matter, and the active group at least comprises carboxyl. The preparation method comprises the following steps: carrying out oxidation reaction on the carbon fiber and hydrogen peroxide, and carrying out organic condensation reaction on the oxidized carbon fiber and an amino-containing organic matter in an organic solvent. The platinum adsorption modified carbon fiber can be used for adsorbing platinum ions in an acidic aqueous solution containing platinum ions, can efficiently adsorb platinum ions with high, medium and low concentrations in a complex acidic environment, and is high in adsorption selectivity, high in saturation adsorption capacity and wide in pH application range.

Description

technical field [0001] The invention belongs to the technical field of platinum ion enrichment and recovery, and relates to a platinum ion selective enrichment carbon fiber and its preparation method and application, in particular to a platinum-absorbing modified carbon fiber containing an organic chelating group and its preparation method and application . Background technique [0002] The content of platinum in the earth's crust is extremely rare, except in the form of natural alloys, platinum minerals or solid solutions, it is often associated with other metal ores with very low composition content. Therefore, the current metallurgical industry extracts and recovers the trace platinum group valuable metals contained in the leaching solution while extracting the main metal components. It often needs to go through complicated enrichment and separation methods, such as precipitation and extraction methods, etc., and there are The grade of the recovered part is not high, and...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the existing material modification technology, and provide a platinum ion that can target high, medium and low concentrations in complex environments, has strong adsorption selectivity, high saturated adsorption capacity, and a wide range of pH applications. Platinum-absorbing modified carbon fibers containing organic chelating groups and their preparation methods and applications

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