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Extraction: Advanced Methods

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...

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Preparation of Highly Porous Coordination Polymer Coatings on Macroporous Polymer Monoliths for Enhanced Enrichment of Phosphopeptides

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Two Isostructural Titanium Metal-Organic Frameworks for Light Hydrocarbon Separation.

Yayong Sun^1,2, Mei-Yan Gao¹, Yuexin Sun¹

¹State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China.

Inorganic Chemistry

|September 9, 2021

Summary

Titanium metal-organic frameworks (Ti-MOFs) show improved light hydrocarbon adsorption. New porous Ti-MOFs, FIR-125 and FIR-126, offer selective separation of C2 and C3 hydrocarbons from methane.

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Area of Science:

Materials Science
Chemical Engineering
Separation Science

Background:

Titanium metal-organic frameworks (Ti-MOFs) are investigated for gas separation applications.
Traditional cyclic Ti-oxo clusters (Ti8O8(CO2)16, TiPh) show limitations in light hydrocarbon adsorption capacity.

Purpose of the Study:

To evaluate the performance of novel porous Ti-MOFs, FIR-125 and FIR-126, for light hydrocarbon separation.
To assess the impact of functional groups and pore size on separation selectivity.

Main Methods:

Synthesis and characterization of FIR-125 and FIR-126 Ti-MOFs.
Adsorption studies for light hydrocarbons (methane, C2, C3) under ambient conditions.
Comparative analysis with existing Ti-oxo cluster materials.

Main Results:

FIR-125 and FIR-126 exhibit enhanced adsorption capacities for light hydrocarbons compared to TiPh.
These Ti-MOFs demonstrate high selectivity for separating C2 and C3 hydrocarbons from methane.
The porous structure and functional groups are key factors for selective separation.

Conclusions:

Ti-MOFs, specifically FIR-125 and FIR-126, are promising porous adsorbents for light hydrocarbon separation.
The design of Ti-MOFs with tailored pore structures and functional groups can achieve efficient gas separations.
These findings support the potential of Ti-MOFs in industrial applications for hydrocarbon processing.