Halocarbon Conversion to Inorganic Salts via Metal Salt Reaction
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Solution Overview
Problem
Current methods for recycling halogen-containing polymers are ineffective, leading to significant waste disposal issues and environmental hazards, as these materials, such as fluoropolymers, cannot be recycled and release harmful substances like CFCs and HCFCs, depleting the ozone layer.
Innovation Solution
A process involving a two-step cascade reaction where halocarbons are reacted with metal salts containing less electronegative elements like nitrogen, oxygen, or sulfur, at high temperatures, to convert them into valuable inorganic halogen salts like Na3YF6 and NaF, while carbon is converted into carbon monoxide, effectively recycling halogen atoms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If halogen-containing polymers are disposed of in landfill, then waste is removed from the system, but environmental harm increases and halogen resources are lost
Solution Approach 1:
The patent converts harmful halogen-containing waste polymers into beneficial inorganic halogen salts through a chemical transformation process. The halogen atoms that would otherwise be released as harmful substances are recovered and transformed into useful products like metal fluorides, chlorides, bromides, or iodides, simultaneously eliminating environmental harm and preserving halogen resources
Solution Approach 2:
The patent implements a recovery process where halogen atoms are extracted from discarded halogen-containing polymers. Instead of simply discarding the waste material, the process recovers the valuable halogen components through chemical reaction with metal salts, transforming waste into recoverable resources that can be reused in other applications
2Ease of operation
If halogen-containing polymers are released into the atmosphere, then the polymers are dispersed, but ozone layer depletion occurs
Solution Approach 1:
The patent transforms the harmful effect of atmospheric release into a beneficial recovery process. Instead of allowing halogen-containing polymers to decompose in the atmosphere and deplete the ozone layer, the process captures and chemically transforms the halogen atoms into stable inorganic salts, converting a harmful environmental pathway into a resource recovery opportunity
3Loss of substance
If recycling processes are developed for halogen-containing polymers, then waste reduction is achieved, but process complexity increases
Solution Approach 1:
The patent employs parameter changes in the form of temperature-controlled chemical reactions to achieve recycling. By heating the mixture of halogen-containing polymer and metal salt to specific temperature ranges (typically above the decomposition temperature of the polymer), the process transforms complex waste materials into useful products through controlled thermalchemical reactions, achieving waste reduction through manageable parameter adjustments rather than complex mechanical separation systems
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 process recovers halogen atoms from waste halocarbons, reducing waste production and increasing halogen availability for other uses, while producing industrially useful inorganic salts like NaF, CaF2, and Na3AlF6, and reducing environmental harm.
Implementation Method 1
reacting a halocarbon with a metal salt to produce the inorganic salt comprising a halogen
Data Source
AI summary
Described herein is a process for converting halocarbons into inorganic salts comprising a halogen, the process comprising reacting a halocarbon with a metal salt to produce the inorganic salt comprising a halogen; wherein the metal salt comprises a metal and an electronegative element selected from nitrogen, oxygen, sulfur, chlorine, selenium, bromine and iodine, or a mixture thereof; wherein the halogen of the halocarbon is more electronegative than the electronegative element of the metal salt.