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Solid phase extraction filler and preparation method thereof

An extraction and raw material technology, applied in the field of material science, can solve the problems of difficult cost for production units, poor stability, high price of reverse-phase bonded silica gel, and achieve the effect of easy implementation and cost reduction in popularization and application.

Inactive Publication Date: 2009-09-16
YUXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, octadecyl bonded silica gel (C 18 ) when used to extract gold in alkaline cyanide solution, its enrichment multiple and extraction recovery rate are unmatched by traditional liquid-liquid extraction technology
But at the same time, it is also found that the applicable pH of the reversed-phase bonded silica stationary phase is narrow (pH2-8, and the pH range of special bonded silica can reach 1-12), and the use stability is poor under alkaline conditions, and it is easy to fail
Moreover, the price of reverse-bonded silica gel is high, exceeding 10,000 yuan per kilogram, and the cost is difficult to be accepted by the production unit.

Method used

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  • Solid phase extraction filler and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Take 100g of porous graphitized carbon black with a particle size of 30 μm in a beaker, add 50 mL of 10% dihexadecyldimethylammonium chloride acetone solution, and evaporate to dryness in a water bath at 65 ° C under stirring to obtain a double ten The graphitized carbon black of hexaalkyldimethylammonium chloride, the loading of dihexadecyldimethylammonium chloride is 5% of the graphitized carbon black.

Embodiment 2

[0025] Take 50g particle size and be 40 μm porous graphitized carbon black in beaker, add 50mL concentration and be 10% octadecyltrimethylammonium chloride acetone solution, evaporate to dryness in 60 ℃ of water baths under stirring, obtain the attached octadecyl The graphitized carbon black of trimethylammonium chloride, the load of octadecyltrimethylammonium chloride is 10% of the amount of graphitized carbon black.

Embodiment 3

[0027] Get 50g particle size and be 60 μm porous graphitized carbon black in beaker, add 50mL concentration and be 10% octadecyl dimethyl benzyl ammonium chloride acetone solution, evaporate to dryness in 60 ℃ of water baths under stirring, obtain the The graphitized carbon black of alkyl dimethyl benzyl ammonium chloride, the load of octadecyl dimethyl benzyl ammonium chloride is 10% of the graphitized carbon black.

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Abstract

The invention discloses a solid phase extraction filler and a preparation method thereof. In the method of the invention, acetone is used for dissolving surface active agent, thus obtaining active agent acetone solution with a concentration of 10% (m / v) for standby use; porous graphitized carbon black is placed in a dry container, the porous graphitized carbon black is stirred while the standby active agent acetone solution is added to the container to be mixed evenly; stirring is continued and the mixture is evaporated to dryness by water bath at the temperature of 50-70 DEG C, the obtained graphitized carbon black attached with the surface active agent is exactly the needed solid phase extraction filler. The filler is used for concentrating gold from alkaline cyanide solution, the first extraction yield of gold exceeds 96.5%, concentration multiple exceeds 250 times, extraction capacity of the materials on the gold is more than 29mg / g; the attached surface active agent is not washed away when being eluted by aqueous medium and can be used repeatedly, durability thereof is much better than the durability of C18; in addition, material cost is only 1 / 5 of octadecyl silane (C18), thereby enjoying a good prospect for promotion and application.

Description

technical field [0001] The invention belongs to the field of material science, and in particular relates to a novel solid-phase extraction filler. At the same time, the invention also relates to a preparation method of the filler. Background technique [0002] Solid Phase Extraction (Solid Phase Extraction, SPE) is a new technology that has only developed rapidly in recent years. It is developed by combining liquid-solid extraction and liquid chromatography column technology. SPE was first used for Sample preparation in analytical chemistry, followed by separation of pharmaceuticals and natural products is widely used. [0003] Compared with traditional solvent extraction, solid-phase extraction technology has the following obvious advantages: (1) The consumption of organic solvent is small, and only a small amount of eluent is needed to completely wash off the enriched components after being enriched by the solid-phase extraction column , the organic solvent consumption i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/00
Inventor 胡秋芬徐祎然范鹏杨光宇
Owner YUXI NORMAL UNIV
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