Phosphoric Acid Metal Extractant for Selective Ion Separation
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Solution Overview
Problem
Existing metal extractants used in wet extraction methods lack selectivity and efficiency in separating specific metal ions, requiring prolonged phase separation times, which hampers productivity and recovery efficiency.
Innovation Solution
A metal extractant with a basic structure derived from a phosphoric acid-based compound, incorporating substituents with specific molecular weights and structural features, enhances selectivity and phase separation rate, allowing rapid separation of metal ions between water and oil phases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional metal extractants are used, then metal ions can be extracted to the organic phase, but the selectivity of metal ions to be extracted is insufficient
Solution Approach 1:
The patent introduces specific functional groups (carboxylic acid groups, phosphoric acid groups, or sulfonic acid groups) at particular positions on the aromatic ring structure of the extractant. These localized functional groups provide specific coordination sites that selectively bind to target metal ions (Co2+, Ni2+, Cu2+, Zn2+, Mn2+, or Cd2+), thereby achieving high selectivity while maintaining operational efficiency
Solution Approach 2:
The patent systematically varies the molecular structure parameters of the extractant, including the type of acid group (carboxylic, phosphoric, or sulfonic), the number of acid groups (1-4 groups), and the substitution patterns on the aromatic ring. These parameter changes enable optimization of both selectivity for specific metal ions and the rate of phase separation
2Loss of time
If conventional metal extractants are used, then metal extraction can proceed, but a long period of time is required for liquid phase separation
Solution Approach 1:
The patent modifies physical parameters of the extractant molecules, specifically controlling the total number of carbon atoms (6-20 carbons) and the molecular weight through selective substitution on the aromatic ring. These parameter changes optimize the balance between extraction capability and phase separation speed, reducing separation time while maintaining high recovery efficiency
Solution Approach 2:
The extractants are composite structures combining an aromatic ring core with specific functional groups and alkyl substituents. This composite structure provides both the chemical functionality for metal ion binding and the appropriate hydrophobicity for rapid phase separation, achieving high productivity
3Manufacturing precision
If existing extractant structures are used, then metal extraction is possible, but high selectivity and rapid phase separation cannot be achieved simultaneously
Solution Approach 1:
The patent places specific functional groups (carboxylic acid, phosphoric acid, or sulfonic acid groups) at predetermined positions on the aromatic ring structure. These localized functional groups create specific coordination environments that selectively bind target metal ions while the overall molecular structure ensures rapid phase separation, achieving both high selectivity and high productivity simultaneously
Solution Approach 2:
The extractant molecules are designed as composite structures with an aromatic ring core, specific functional groups for metal binding, and alkyl substituents for solubility and phase separation control. This composite design enables simultaneous achievement of high selectivity (through functional groups) and rapid phase separation (through molecular structure parameters)
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 new metal extractant achieves high selectivity and rapid phase separation, enabling efficient recovery of specific metal ions with high recovery rates, particularly for cobalt and nickel ions, supporting sustainable metal recycling.
Implementation Method 1
the metal ions to which the metal extractant is coordinated are moved (extracted) to the organic phase
Implementation Method 2
a basic structure derived from a phosphoric acid-based compound
Data Source
AI summary
Provided are a compound and a metal extractant represented by Formula (I), and a separation recovery method of metal ions using the metal extractant.In Formula (I), R1 and R2 each independently represent a substituent having a molecular weight of 100 or higher, in which at least one of the substituents has a molecular weight of 160 or higher. YP represents a sulfur atom or an oxygen atom. Z represents a hydroxy group, a sulfanyl group, or a hydroxyaryl group. L represents a single bond, in which in a case where n represents 2 or more, L interposed between two adjacent P's represents a single bond or a linking group. n represents an integer of 1 to 6.