HCFC-142 Fluorination Stabilization to Prevent Feedstock Decomposition
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Solution Overview
Problem
Conventional methods for producing fluoroethane compounds like HCFC-142 face issues with the decomposition of starting materials such as HCC-140 and HCO-1130, leading to reduced conversion and selectivity, and the need for effective stabilization to prevent by-product formation.
Innovation Solution
A method involving the fluorination of chlorine-containing compounds with hydrogen fluoride in the presence of a stabilizer, such as hydroquinone monomethyl ether, to suppress decomposition and extend catalyst life, resulting in high yield and efficiency of HCFC-142 production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional methods are used to produce HCFC-142 from HCC-140 and HCO-1130, then the production process can be carried out, but the starting materials decompose leading to reduced conversion and selectivity
Solution Approach 1:
A stabilizer is introduced as an intermediary substance that mediates between the starting materials and the reaction conditions. The stabilizer specifically interacts with HCC-140 and HCO-1130 to prevent their decomposition, thereby maintaining their stability while allowing the fluorination reaction to proceed with high conversion and selectivity to HCFC-142
Solution Approach 2:
The invention changes the chemical environment parameters by introducing a stabilizer that modifies the reaction conditions. This parameter change enables the starting materials to remain stable under the reaction conditions, simultaneously achieving high conversion and selectivity without decomposition
2Device complexity
If the fluorination reaction is performed without a stabilizer, then the process is simpler, but decomposition occurs causing by-product formation
Solution Approach 1:
The stabilizer acts as a mediator that prevents harmful decomposition reactions. By introducing this intermediary substance, the process maintains simplicity while eliminating by-product formation through the stabilizer's protective action on the starting materials
3Productivity
If conventional fluorination is used, then HCFC-142 can be produced, but catalyst life is reduced due to decomposition
Solution Approach 1:
The stabilizer serves as a protective intermediary that shields the catalyst from decomposition products. This allows the catalyst to maintain its activity over extended periods, significantly extending catalyst life while preserving high production rates of HCFC-142
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 method effectively prevents the decomposition of starting materials, extends catalyst life, and reduces by-product formation, enabling high-yield production of HCFC-142, which can be further processed to produce HFC-143 and HFO-1132(E/Z) with high efficiency.
Implementation Method 1
the decomposition of a starting material, such as HCC-140 and HCO-1130, is suppressed
Implementation Method 2
bringing at least one chlorine-containing compound selected from the group consisting of 1,1,2-trichloroethane (HCC-140), (E)-1,2-dichloroethylene (HCO-1130(E)), (Z)-1,2-dichloroethylene (HCO-1130(Z)), 1,2-dichloro-1-fluoroethane (HCFC-141), (E)-1-chloro-2 fluoroethylene (HCFO-1131(E)) and (Z)-1-chloro-2-fluoroethylene (HCFO-1131(Z)) into contact with hydrogen fluoride in the presence of a stabilizer to perform at least one fluorination reaction
Implementation Method 3
in the presence of a stabilizer to perform at least one fluorination reaction, thus obtaining a reaction gas containing HCFC-142, hydrogen chloride, and hydrogen fluoride
Data Source
AI summary
An object of the present disclosure is to provide a method for producing HCFC-142, which is a target product, with high yield and high efficiency, by preventing the decomposition of starting materials, such as HCC-140 and HCO-1130. A method for producing HCFC-142, comprising bringing a chlorine-containing compound into contact with hydrogen fluoride in the presence of a stabilizer to perform at least one fluorination reaction, thus obtaining a reaction gas containing HCFC-142, hydrogen chloride, and hydrogen fluoride.