Amorphous Iron Oxide Hydroxide Desulfurizer Preparation and Regeneration
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Solution Overview
Problem
Conventional methods for producing amorphous iron oxide hydroxide desulfurizers are complex, unsuitable for mass production, result in low sulfur capacity, and cannot be easily regenerated, leading to resource wastage and environmental pollution.
Innovation Solution
A method involving mixing solid soluble ferrous salt with a solid hydroxide in a specific molar ratio, kneading, drying, and roasting to produce highly concentrated amorphous iron oxide hydroxide, followed by regeneration through grinding, suspension with oxygen, and solvent extraction to separate elemental sulfur, allowing for high sulfur capacity and recyclability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional laboratory methods are used to produce amorphous iron oxide hydroxide, then desulfurization performance is improved, but process complexity increases and mass production becomes difficult
Solution Approach 1:
The patent changes the preparation parameters by using ferrous sulfate solution mixed with ammonium hydroxide or sodium hydroxide solution, followed by filtration and drying. This parameter modification transforms the complex laboratory method into a simplified process suitable for mass production while maintaining amorphous structure and high desulfurization performance
Solution Approach 2:
The patent extracts the essential components (ammonium hydroxide or sodium hydroxide solution) from the complex laboratory procedure and isolates the key steps (mixing, filtration, drying) that produce amorphous iron oxide hydroxide, eliminating unnecessary complex steps and enabling scalable production
2Reliability
If conventional preparation methods are used, then amorphous iron oxide hydroxide is produced, but sulfur capacity remains low
Solution Approach 1:
The patent optimizes preparation parameters including the use of specific molar ratios of ferrous sulfate to ammonium hydroxide/sodium hydroxide, controlled drying temperatures (60-100°C), and pH management to maximize the formation of amorphous iron oxide hydroxide with enhanced sulfur capacity exceeding 50%
3Reliability
If conventional desulfurizers are used, then desulfurization function is provided, but regeneration is difficult or costly
Solution Approach 1:
The patent implements a regeneration system where spent desulfurizer is treated with air or oxygen to oxidize adsorbed sulfur compounds back to elemental sulfur or sulfate, which can then be removed. This allows the iron oxide hydroxide to be recovered and reused, making regeneration simple and cost-effective while maintaining desulfurization function
Solution Approach 2:
The desulfurizer exhibits self-regeneration capability through exposure to air or oxygen, where the oxidizing environment automatically converts adsorbed sulfur back to removable forms without requiring complex external processing, enabling easy regeneration and repeated use
4Reliability
If conventional desulfurizers are used, then desulfurization is achieved, but large quantities of waste must be buried
Solution Approach 1:
The patent recovers the active ingredient amorphous iron oxide hydroxide from spent desulfurizer through oxidation and filtration processes, transforming waste material into reusable desulfurizing agent and eliminating the need to bury large quantities of waste
Solution Approach 2:
The patent converts the harmful spent desulfurizer waste into a beneficial reusable resource by oxidizing adsorbed sulfur compounds and recovering the iron oxide hydroxide, transforming waste disposal into a resource recovery process that reduces environmental pollution
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
Enables mass production of desulfurizers with high sulfur capacity and facilitates easy regeneration, reducing waste and environmental impact while maintaining desulfurization efficiency.
Implementation Method 1
mixing a soluble ferrous salt with a hydroxide, in a molar ratio of iron element to hydroxyl of between 1:2 and 1:3, to yield a mixture; kneading the mixture and allowing it to react
Implementation Method 2
drying in air; washing with water and filtering to yield a solid; drying naturally or roasting the solid to yield a composition comprising amorphous iron oxide hydroxide
Implementation Method 3
preparing the waste powder in a suspension and charging the suspension with a gas containing oxygen to obtain a slurry comprising amorphous iron oxide hydroxide and elemental sulfur
Implementation Method 4
filtering the slurry to yield a solid and extracting the elemental sulfur from the solid using a solvent to regenerate the composition comprising amorphous iron oxide hydroxide
Data Source
AI summary
A desulfurizer containing at least a composition of a highly concentrated amorphous iron oxide hydroxide as the active ingredient. A method for preparing a composition containing at least a highly concentrated amorphous iron oxide hydroxide. A method for regenerating the desulfurizer. The desulfurizer contains at least the composition of a highly concentrated amorphous iron oxide hydroxide as the active ingredient and a binder. The composition and the desulfurizer have a high sulfur capacity and can be regenerated. This saves resources and reduces environmental pollution. The method for regenerating the desulfurizer includes at least the following steps: a) mixing a solid soluble ferrous salt with a solid hydroxide, b) kneading the mixture and allowing it to react at temperatures not exceeding 90° C., c) drying in air, d) washing with water and filtering to yield a solid, and e) drying naturally or roasting the solid.