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Related Concept Videos

Colloidal precipitates01:09

Colloidal precipitates

The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
Extraction: Advanced Methods00:56

Extraction: Advanced Methods

Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is formed in...

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Related Experiment Video

Updated: May 22, 2026

Sulfate Separation by Selective Crystallization with a Bis-iminoguanidinium Ligand
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Published on: September 8, 2016

π-π Stacking-driven Self-Assembly Enables Low-Odor, Highly Selective Xanthate Collectors for Galena Flotation.

Dongtao Tang1, Shuai Wang1, Jun Wang2

  • 1College of Chemistry and Chemical Engineering, and Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resources, Central South University, Changsha 410083, China.

Langmuir : the ACS Journal of Surfaces and Colloids
|May 20, 2026
PubMed
Summary
This summary is machine-generated.

A novel xanthate collector, O-(2-(bis(phenylmethyl)amino)ethyl) xanthate (PAEX), was synthesized to reduce odor and improve selectivity in mineral flotation. This green chemistry approach enhances sulfide ore separation and offers industrial potential.

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Area of Science:

  • Mineral Processing and Surface Chemistry
  • Green Chemistry and Sustainable Materials

Background:

  • Conventional xanthates used in sulfide mineral flotation cause odor pollution and lack selectivity for similar minerals.
  • Existing collectors struggle with efficient separation of complex sulfide ores.

Purpose of the Study:

  • To synthesize and evaluate a novel, low-odor, and highly selective xanthate collector for sulfide mineral flotation.
  • To address the limitations of traditional collectors in industrial mineral processing.

Main Methods:

  • Molecular self-assembly strategy to synthesize O-(2-(bis(phenylmethyl)amino)ethyl) xanthate (PAEX).
  • Density Functional Theory (DFT) calculations, electronic nose measurements, and flotation experiments.
  • Interfacial characterizations of galena and sphalerite.

Main Results:

  • PAEX demonstrated significantly reduced odor compared to isobutyl xanthate (over 74.78% decrease in sulfide response).
  • Achieved highly selective galena collection across a wide pH range.
  • Formed stable hydrophobic films via ordered adsorption, enhancing wettability contrast.

Conclusions:

  • The π-π stacking-assisted self-assembly strategy effectively overcomes odor and selectivity issues of conventional xanthates.
  • PAEX shows strong industrial potential for green mineral processing and complex sulfide ore separation.