Anthraquinone Process Solvent System for High Solubility
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing solvent systems for the anthraquinone process in hydrogen peroxide production suffer from low solubility of anthraquinone and anthrahydroquinone, leading to low conversion rates, high circulation volumes, and energy consumption, as well as poor hydrogenation efficiency and mass transfer capabilities, resulting in low-quality hydrogen peroxide products and increased anthraquinone consumption.
Innovation Solution
A solvent system comprising an imide derivative, a C9-10 aromatic hydrocarbon, trioctyl phosphate, and diisobutylcarbinol, which significantly enhances the solubility of anthraquinone and anthrahydroquinone, improves hydrogenation efficiency, and reduces anthraquinone degradation, thereby increasing the production efficiency of hydrogen peroxide.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If C9-C10 heavy aromatic hydrocarbon and trioctyl phosphate are used as solvent system, then the working solution can be conveniently separated from water by extraction, but the solubility of anthraquinone and anthrahydroquinone is relatively low
Solution Approach 1:
The patent uses a composite solvent system consisting of C9-C10 heavy aromatic hydrocarbon and trioctyl phosphate in a volume ratio of 95:5 to 50:50. This composite solvent combines the water-separation capability of aromatic hydrocarbon with the enhanced solubility properties of trioctyl phosphate, achieving both good separation performance and improved solubility of anthraquinone (up to 180 g/L) and anthrahydroquinone (up to 99.8 g/L).
Solution Approach 2:
The patent optimizes the volume ratio parameters of the solvent components to achieve the desired balance between solubility and separation performance. By adjusting the proportion of C9-C10 heavy aromatic hydrocarbon and trioctyl phosphate within specific ranges, the system achieves optimal solubility for both anthraquinone and anthrahydroquinone while maintaining adequate density difference for water separation.
2Productivity
If the solubility of anthraquinone is increased, then the conversion rate increases, but the circulation volume of the working solution increases leading to higher energy consumption
Solution Approach 1:
The composite solvent system enables high solubility of anthraquinone (up to 180 g/L) at moderate temperatures, allowing increased conversion rates without requiring excessive circulation volumes. The synergistic effect of C9-C10 heavy aromatic hydrocarbon and trioctyl phosphate provides both high solubility capacity and favorable flow properties, reducing pumping energy requirements while maintaining high productivity.
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 solvent system achieves solubilities of 180 g/L or above for anthraquinone and 99.8 g/L for anthrahydroquinone, with hydrogenation efficiencies exceeding 13 g/L, reducing energy consumption and improving the quality and yield of hydrogen peroxide production.
Implementation Method 1
an anthraquinone derivative dissolved in a solvent is hydrogenated in the presence of a catalyst to obtain a corresponding anthrahydroquinone compound
Implementation Method 2
an anthraquinone derivative dissolved in a solvent is hydrogenated in the presence of a catalyst to obtain a corresponding anthrahydroquinone compound
Implementation Method 3
which is then oxidized to generate hydrogen peroxide; meanwhile, the anthrahydroquinone is oxidized back to the original anthraquinone
Implementation Method 4
the generated hydrogen peroxide is extracted by pure water to obtain hydrogen peroxide products with different concentrations
Data Source
AI summary
A solvent system of a working solution for producing hydrogen peroxide through anthraquinone process contains or consists of the following components, in parts by volume: A) 2-60 parts of an imide derivative represented by formula (I); B) 40-98 parts of an aromatic hydrocarbon, preferably C9-10 aromatic hydrocarbon; C) 0-20 parts of trioctyl phosphate; and D) 0 to 20 parts of diisobutylcarbinol. The solvent system achieves good solubility of both anthraquinone and anthrahydroquinone, low intersolubility with water and stable physicochemical properties.