Hydrogen Peroxide Working Solution Composition Optimization
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Solution Overview
Problem
Current methods for producing hydrogen peroxide using alkylanthraquinone-based working solutions face challenges such as low productivity, slow reaction rates, and loss of quinones due to side reactions, primarily due to suboptimal composition and solubility issues of 2-alkylanthraquinone and 2-tetrahydroalkylanthraquinone in the working solution.
Innovation Solution
A method optimizing the composition of the working solution by using 65-95 mol% amyl and 5-35 mol% ethyl groups in 2-alkylanthraquinone and 2-tetrahydroalkylanthraquinone, with a molar ratio of 4:6 to 1:9, enhancing solubility and reaction rates, and incorporating inert ingredients to improve process efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a working solution with high proportion of alkylanthraquinone is used, then the solubility of quinones is improved, but the reaction rate of hydrogenation becomes slow
Solution Approach 1:
The patent changes the chemical composition parameters of the working solution by optimizing the molar ratio of 2-alkylanthraquinone to 2-tetrahydroalkylanthraquinone within specific ranges (0.1:0.9 to 0.9:0.1, preferably 0.2:0.8 to 0.8:0.2). This parameter optimization simultaneously achieves high solubility and fast hydrogenation reaction rate, resolving the contradiction between stability and speed.
2Stability of the object's composition
If a working solution with high proportion of alkylanthraquinone is used, then the solubility of quinones is improved, but productivity of hydrogen peroxide decreases due to side reactions
Solution Approach 1:
The patent optimizes the composition parameters by controlling the molar ratio of alkylanthraquinone to tetrahydroalkylanthraquinone within specific ranges, which minimizes side reactions and maximizes hydrogen peroxide productivity while maintaining good solubility.
Solution Approach 2:
The patent uses a composite working solution system containing both alkylanthraquinone and tetrahydroalkylanthraquinone in optimized proportions, along with specific solvents and inert ingredients. This composite approach creates a synergistic effect that improves both solubility and productivity simultaneously.
3Ease of manufacture
If 2-ethylanthraquinone is used as working material, then the cost is reduced, but the solubility of quinones and reaction rate become slow
Solution Approach 1:
The patent merges 2-ethylanthraquinone and 2-amylanthraquinone (or their tetrahydro derivatives) in a specific molar ratio range (0.1:0.9 to 0.9:0.1) to create a composite working solution. This combination allows the system to benefit from the low cost of ethylanthraquinone while the amylanthraquinone component provides high solubility and fast reaction rate, resolving the contradiction between cost and performance.
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 approach increases hydrogen peroxide production per liter, reduces reduction time, minimizes quinone loss, and optimizes physical properties like specific gravity and viscosity, facilitating smoother process operations.
Implementation Method 1
a working solution prepared by dissolving alkylanthraquinones (alkylanthraquinone and tetrahydroalkylanthraquinone) in an organic solvent is first reacted in the presence of a catalyst with hydrogen gas to produce alkylanthrahydroquinone
Implementation Method 2
When the alkylanthrahydroquinone is oxidized by air or oxygen gas back to alkylanthraquinone, hydrogen peroxide is produced
Data Source
AI summary
The present invention relates to a method for the preparation of hydrogen peroxide through a continuous process, extracting hydrogen peroxide produced from reduction and oxidation of a working solution and recycling the oxidized working solution back to the reduction process, wherein the composition of the working solution, i.e. the composition of 2-alkylanthraquinone and 2-tetrahydroalkylanthraquinone, is optimized to increase the solubility of the quinones and to improve the reaction rate. The working solution comprises 2-alkylanthraquinone, 2-tetrahydroalkylanthraquinone and an organic solvent, wherein 65-95 mol % of the alkyl group of 2-alkylanthraquinone and 2-tetrahydroalkylanthraquinone is amyl and the remaining 5-35 mol % of the alkyl group is ethyl, and the molar ratio of 2-alkylanthraquinone to 2-tetrahydroalkylanthraquinone is from 4:6 to 1:9.