3D Alkynyl Porous Aromatic Framework for Precious Metal Recovery

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Solution Overview

Problem

Existing adsorbent materials for treating precious metal-contaminated wastewater face challenges such as inferior adsorption capacity, difficulty in pore size adjustment, poor stability in water, and complex preparation processes.

Innovation Solution

A three-dimensional alkynyl-containing porous aromatic framework polymer is developed, prepared via a Sonogashira-Hagihara coupling reaction using tetrakis(p-bromophenyl)methane and 1,3,5-triethynyl benzene, offering enhanced adsorption capacity and stability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If traditional natural inorganic adsorbents such as bentonite, diatomite and zeolite are used, then the preparation process is simple, but the adsorption capacity for precious metals is inferior

Engineering Contradiction:

Improvepreparation process simplicityVSAvoidadsorption capacity

Core Design Contradiction:

Ease of manufactureVSQuantity of substance

Solution Approach 1:

The patent creates a composite material by combining organic building blocks (aromatic compounds with alkyne groups) to form a porous aromatic framework polymer. This composite structure integrates the advantages of organic materials (high surface area, tunable porosity) with a stable polymer network, achieving both high adsorption capacity and structural integrity that traditional inorganic adsorbents cannot provide.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The invention employs a porous aromatic framework polymer with controlled pore size and high specific surface area. The porous structure is formed through the specific arrangement of aromatic building blocks connected by alkyne linkages, creating channels that facilitate metal ion adsorption while maintaining structural stability, thus overcoming the limitations of traditional inorganic adsorbents.

Inventive Principle:

Principle #31Porous materials

2Quantity of substance

If novel adsorption materials such as porous graphene, organic resins, bio-adsorbents and metal-organic frameworks are used, then the adsorption performance is desirable, but the stability in water phase is poor

Engineering Contradiction:

Improveadsorption performanceVSAvoidstability in water phase

Core Design Contradiction:

Quantity of substanceVSReliability

Solution Approach 1:

The patent modifies the chemical parameters of the adsorbent by introducing hydrophobic aromatic groups and stable alkyne linkages in the polymer framework. These parameter changes enhance the material's resistance to water degradation while maintaining high adsorption performance, solving the stability issue of conventional organic adsorbents in aqueous environments.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention implements local quality differentiation within the polymer structure by incorporating specific aromatic building blocks with electron-rich regions that selectively bind metal ions, while the overall hydrophobic framework provides water stability. This localized functional design allows the material to simultaneously achieve high adsorption performance and stability in water phase.

Inventive Principle:

Principle #3Local quality

3Quantity of substance

Engineering Contradiction:

Improveadsorption performanceVSAvoidpreparation process complexity

Core Design Contradiction:

Quantity of substanceVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by pre-synthesizing standardized aromatic building blocks with specific functional groups (alkyne moieties) before assembling them into the final porous framework. This modular pre-preparation approach simplifies the overall synthesis process, making it more manageable and reproducible compared to attempting to create the complex three-dimensional structure in a single step, thus reducing preparation complexity while maintaining high adsorption performance.

Inventive Principle:

Principle #10Preliminary action

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The polymer exhibits excellent adsorption performance for precious metal ions such as silver, gold, and palladium, with high maximum adsorption capacities and desirable selectivity coefficients, making it suitable for efficient recovery of precious metals from wastewater.

Implementation Method 1

under a protective atmosphere, mixing tetrakis(p-bromophenyl)methane, 1,3,5-triethynyl benzene, a catalyst and an amine solvent, and subjecting to a Sonogashira-Hagihara coupling reaction to obtain the three-dimensional alkynyl-containing porous aromatic framework polymer

Methodology Applied

Scientific EffectSonogashira-Hagihara coupling reaction: Chemical Bonding

Implementation Method 2

the adsorption method has a great potential for treating precious metal-contaminated wastewater due to the advantages such as no secondary pollution to environment, high efficiency and low cost

Methodology Applied

Scientific EffectAdsorption: Adsorption

Data Source

PatentUS12274998B2Three-dimensional alkynyl-containing porous aromatic framework polymer and preparation method and use thereof

Publication Date: 2025.04.15 NANCHANG HANGKONG UNIVERSITY

AI summary

The present disclosure provides a three-dimensional alkynyl-containing porous aromatic framework polymer and a preparation method and use thereof. The polymer has a structure represented by Formula I:The preparation method includes: under a protective atmosphere, mixing tetrakis(p-bromophenyl)methane, 1,3,5-triethynyl benzene, a catalyst and an amine solvent, and subjecting to a Sonogashira-Hagihara coupling reaction to obtain the three-dimensional alkynyl-containing porous aromatic framework polymer having the structure represented by Formula I.