Polyaromatic Oxide Synthesis via High-Pressure Oxygen
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Solution Overview
Problem
Conventional methods for preparing polyaromatic oxide using strong acids like nitric or sulfuric acid are hazardous, generate industrial wastewater, and increase production costs due to nitrogen oxide production, necessitating corrosion-resistant equipment.
Innovation Solution
A method involving a hydrothermal reaction at high temperature and pressure in a gas atmosphere with at least 10 wt% oxygen, without using a strong acid, where polyaromatic hydrocarbons are oxidized by increasing the oxygen partial pressure to 2-30 bar, allowing efficient oxidation of polyaromatic hydrocarbons.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If concentrated nitric acid or sulfuric acid is used to oxidize polyaromatic hydrocarbon, then oxidation efficiency is improved, but production costs increase and environmental harm worsens
Solution Approach 1:
The patent changes the oxidation parameters from conventional room temperature strong acid oxidation to high temperature (150-300°C) and high pressure (2-30 bar) conditions, enabling oxidation to proceed with oxygen gas instead of strong acids. This parameter change resolves the contradiction by achieving oxidation efficiency through elevated temperature and pressure while eliminating nitrogen oxide and acidic wastewater generation.
Solution Approach 2:
The patent employs oxygen gas under high pressure (2-30 bar) as the oxidant, replacing conventional strong acids. The high pressure condition accelerates the oxidation reaction, maintaining productivity while eliminating the harmful byproducts associated with traditional oxidizing agents like nitric acid.
2Productivity
If concentrated nitric acid or sulfuric acid is used to oxidize polyaromatic hydrocarbon, then oxidation reaction proceeds effectively, but equipment complexity and production costs increase
Solution Approach 1:
By changing to high temperature and high pressure oxidation conditions, the patent eliminates the need for corrosion-resistant equipment required by strong acid processes. The reactor can be made of conventional materials since oxygen gas under pressure does not cause the same corrosion issues as concentrated acids, thereby reducing device complexity while maintaining oxidation effectiveness.
Solution Approach 2:
The patent replaces expensive corrosion-resistant equipment with conventional reactor materials. By using oxygen gas instead of strong acids, the system can employ simpler, less expensive equipment that does not require special corrosion resistance, reducing both capital investment and maintenance costs.
3Quantity of substance
If strong acids are used for oxidation, then polyaromatic oxide is produced, but environmental pollution and processing costs increase
Solution Approach 1:
The patent changes the oxidation process from acid-based to oxygen-based at high temperature and pressure. This produces the same polyaromatic oxide product without generating acidic wastewater, thereby maintaining production output while eliminating environmental pollution and associated wastewater treatment costs.
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 easy production of polyaromatic oxide with higher oxygen content, reducing environmental impact and production costs by eliminating the need for strong acids and minimizing wastewater generation.
Implementation Method 1
reacting the plurality of kinds of polyaromatic hydrocarbons with oxygen to oxidize the plurality of kinds of polyaromatic hydrocarbons
Implementation Method 2
increasing a temperature inside the reactor to 150 to 300° C. and then feeding a gas containing 10 wt % or more of oxygen into the reactor to increase a partial pressure of oxygen inside the reactor to 2 to 30 bar
Data Source
AI summary
Disclosed are a method of preparing polyaromatic oxide and polyaromatic oxide prepared thereby, wherein the method includes (a) placing a plurality of kinds of polyaromatic hydrocarbons and water in a reactor and then stirring them; (b) increasing the temperature inside the reactor to 150 to 300° C. and then feeding a gas containing 10 wt % or more of oxygen into the reactor to increase the partial pressure of oxygen inside the reactor to 2 to 30 bar; and (c) reacting the plurality of kinds of polyaromatic hydrocarbons with oxygen to oxidize the plurality of kinds of polyaromatic hydrocarbons.