Solid Catalyst for Trans-1-Chloro-3,3,3-Trifluoropropene Production
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing methods for producing trans-1-chloro-3,3,3-trifluoropropene suffer from low reaction rates and productivity due to the accumulation of low-reactivity intermediate products, particularly 1,3,3-trichloro-1,1-difluoropropane, which hampers the efficient conversion to the desired compound.
Innovation Solution
The method involves reacting a halogenated C3 hydrocarbon compound, such as 1,3,3-trichloro-1,1-difluoropropane, with hydrogen fluoride in a gas phase in the presence of a solid catalyst and chlorine, effectively enhancing the conversion to trans-1-chloro-3,3,3-trifluoropropene by improving the catalytic activity and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If non-catalytic liquid-phase fluorination reaction is used to produce trans-1-chloro-3,3,3-trifluoropropene, then the reaction can proceed, but the reaction rate is significantly low causing intermediate product accumulation and productivity deterioration
Solution Approach 1:
The patent introduces a solid catalyst as an intermediary substance that mediates the fluorination reaction between 1,1,1,3,3-pentachloropropane and hydrogen fluoride. This catalyst provides an alternative reaction pathway with lower activation energy, significantly increasing the reaction rate and preventing intermediate product accumulation, thereby resolving the contradiction between productivity and reaction rate.
2Temperature
If gas-phase fluorination reaction is used without catalyst, then the reaction can proceed, but high temperature heating for long time is required
Solution Approach 1:
The solid catalyst acts as a mediator that enables the fluorination reaction to proceed at lower temperatures with shorter reaction times. The catalyst provides a surface for the reaction to occur more efficiently, eliminating the need for prolonged high-temperature heating while maintaining effective conversion of the intermediate product to the desired trans-1-chloro-3,3,3-trifluoropropene.
3Productivity
If fluorination reaction is carried out to produce trans-1-chloro-3,3,3-trifluoropropene, then the target compound is formed, but low-reactivity intermediate products accumulate causing productivity deterioration
Solution Approach 1:
The solid catalyst serves as an intermediary that facilitates the conversion of low-reactivity intermediate products into the desired trans-1-chloro-3,3,3-trifluoropropene. By providing an alternative reaction pathway with lower activation energy, the catalyst ensures continuous conversion of intermediates, preventing their accumulation and maintaining high productivity.
Solution Approach 2:
The patent changes the reaction parameters by introducing a solid catalyst, which fundamentally alters the reaction mechanism. This parameter change enables the reaction to proceed at a significantly faster rate and at lower temperatures, transforming the accumulation problem of intermediate products into efficient continuous conversion, thereby resolving the contradiction between productivity and intermediate product quantity.
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 approach significantly enhances the yield of trans-1-chloro-3,3,3-trifluoropropene by stabilizing catalytic activity and efficiently converting low-reactivity intermediates, thereby improving productivity and maintaining catalyst performance.
Implementation Method 1
reacting a halogenated C3 hydrocarbon compound with hydrogen fluoride in a gas phase in the presence of a solid catalyst and chlorine
Data Source
AI summary
The present invention provides a method for efficiently producing 1-chloro-3,3,3-trifluoropropene from a low-reactivity intermediate product. More specifically, provided is a method for producing trans-1-chloro-3,3,3-trifluoropropene, characterized by reacting a halogenated C3 hydrocarbon compound represented by the following general formula (1) with hydrogen fluoride in a gas phase in the presence of a solid catalyst and chlorineC3HXClYFZ (1)wherein X is 2 or 3; when X=2, Y is an integer of 1 to 4, Z is an integer of 0 to 3, and Y+Z=4; and, when X=3, Y is an integer of 1 to 5, Z is an integer of 0 to 4, and Y+Z=5; provided that the general formula (1) represents any halogenated C3 hydrocarbon compound other than trans-1-chloro-3,3,3-trifluoropropene.