Anthraquinone Synthesis for Redox Flow Battery Materials
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Solution Overview
Problem
Current methods for producing anthraquinone-based substances with specific combinations of substituents are inefficient, lacking a practical synthesis method for achieving desired substituent combinations.
Innovation Solution
A method involving the reaction of a starting material with an organic alkylating agent, where the amount of the alkylating agent is controlled to facilitate the introduction of hydroxy and alkoxy groups at specific positions on the anthraquinone skeleton, allowing for the efficient production of anthraquinone-based substances with different substituents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional methods are used to produce anthraquinone-based substances with specific substituent combinations, then various substituent patterns can be illustrated in theory, but practical synthesis efficiency is poor with no established method for achieving desired combinations
Solution Approach 1:
The synthesis process is segmented into two independent stages: first introducing hydroxy groups at desired positions using protected catechol units, then introducing alkoxy groups through selective alkylation. This segmentation allows each substituent type to be controlled independently, solving the problem of achieving specific substituent combinations efficiently
Solution Approach 2:
Hydroxy groups are introduced first as protected catechol units before alkoxy group introduction. This preliminary action establishes the positional framework for hydroxy groups, which then directs subsequent alkylation reactions to achieve precise substituent combinations
2Reliability
If redox flow batteries use vanadium as active material, then mainstream technology is available, but vanadium prices have surged recently
Solution Approach 1:
The patent replaces expensive vanadium with organic anthraquinone-based materials that are cheaper and can be synthesized on demand. The organic active materials offer a cost-effective alternative while maintaining the functional requirements for redox flow battery operation
3Reliability
If substituents are independently selected at 1-to-8 positions of anthraquinone to optimize redox potential, solubility, durability, and electrolyte viscosity, then ideal parameter values can be targeted, but no practical synthesis method exists for achieving specific combinations
Solution Approach 1:
The patent applies local quality by allowing independent selection and optimization of substituents at specific positions (1-to-8) of the anthraquinone core. Each position can be tailored with specific hydroxy or alkoxy groups to optimize local properties such as redox potential, solubility, and durability while maintaining overall molecular stability
Solution Approach 2:
The patent enables systematic variation of substituent parameters (type, position, combination) to optimize performance characteristics. By controlling the alkylation conditions and starting material selection, different substituent patterns can be achieved to tune redox potential, solubility, durability, and electrolyte viscosity independently
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
This method enables the efficient production of anthraquinone-based substances with varying substituents, improving the redox potential, solubility, durability, and electrolyte viscosity, which are critical parameters for active materials in redox flow batteries.
Implementation Method 1
reacting the starting material with an organic alkylating agent
Data Source
AI summary
A method of producing an anthraquinone-based substance represented by the following chemical formula:where at least one of R1 to R8 is a hydroxy group, and at least one of R1 to R8 is an alkoxy group, includes the steps of: preparing a starting material represented by the following chemical formula:where at least two of the R1′ to R8′ are hydroxy groups; and reacting the starting material with an organic alkylating agent. The amount of the organic alkylating agent to be reacted with the starting material is more than or equal to 0.05 mol and less than n mol per 1 mol of the starting material, where n is the number of hydroxy groups contained in the starting material.