Nickel-Lined HF Reactor for Fluorine Redistribution
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Solution Overview
Problem
Existing fluorination processes in the gas phase using hydrofluoric acid reactors face high corrosion issues due to the highly acidic environment, necessitating the development of materials with high temperature resistance and corrosion resistance.
Innovation Solution
A reactor design comprising a base layer and an inner layer made of specific materials, with the inner layer containing at least 80% nickel, is used to minimize corrosion and enhance the fluorine distribution modification process in hydrocarbon compounds, utilizing a chromium-based catalyst.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hydrofluoric acid is used in gas-phase fluorination processes, then fluorine distribution modification is achieved, but corrosion of reactor materials increases significantly
Solution Approach 1:
The reactor employs a composite material structure with a base layer (material M1) and an inner layer (material M2) containing at least 80% nickel by weight. This composite construction provides both structural integrity and corrosion resistance against hydrofluoric acid, resolving the contradiction between process reliability and corrosion resistance.
2Reliability
If corrosion-resistant materials are used in the reactor, then material degradation is reduced, but manufacturing complexity increases due to multi-layer construction
Solution Approach 1:
The inner layer material M2 containing at least 80% nickel is specifically applied only where corrosion resistance is most critical (in contact with hydrofluoric acid), while the base layer M1 provides structural support. This localized quality approach ensures maximum protection where needed without unnecessarily complicating the entire reactor structure.
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 reactor design significantly reduces corrosion rates and effectively modifies fluorine distribution in hydrocarbon compounds, improving process efficiency and safety by minimizing material degradation.
Implementation Method 1
a step of placing in contact between a hydrocarbon compound and a catalytic composition comprising a chromium-based catalyst
Data Source
AI summary
The present invention relates to a process for modifying the fluorine distribution in a hydrocarbon compound, comprising a step of placing in contact between a hydrocarbon compound and a catalytic composition comprising a chromium-based catalyst, said process being performed in a reactor made of a material comprising a base layer made of a material M1 and an inner layer made of a material M2, said base layer and said inner layer being laid against each other, characterized in that the material M2 comprises at least 80% by weight of nickel on the basis of the total weight of the material M2, advantageously at least 90% by weight, preferably at least 95% by weight, in particular at least 99% by weight of nickel on the basis of the total weight of the material M2.