Metal-Salt Trioxane Composition for Corrosion and Pipe-Blockage Prevention
Solution Overview
Problem
Continuous production of trioxane in high yield is hindered by the corrosive nature of methanesulfonic acid, which can lead to equipment corrosion and pipe blockage due to the formation of paraformaldehyde.
Innovation Solution
A composition comprising formaldehyde, methanesulfonic acid, and a metal salt such as a nitrate or persulfate is used, with controlled content ranges to form a protective film on metal surfaces, preventing corrosion and pipe blockage, and maintaining an equilibrium reaction for high trioxane yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If methanesulfonic acid is used as a catalyst for trioxane production, then the yield of trioxane is improved, but equipment corrosion and pipe blockage occur due to the corrosive nature of methanesulfonic acid and formation of paraformaldehyde
Solution Approach 1:
A metal salt is introduced as an intermediary substance that mediates between the methanesulfonic acid catalyst and the equipment. The metal salt forms a protective film on metal surfaces, preventing direct contact between the corrosive methanesulfonic acid and the equipment, thereby eliminating equipment corrosion and pipe blockage while maintaining high trioxane yield
Solution Approach 2:
The harmful corrosive property of methanesulfonic acid is converted into a beneficial effect. The corrosion tendency of methanesulfonic acid is utilized to form a protective metal salt film on equipment surfaces, which then prevents further corrosion. The harmful paraformaldehyde formation is also converted into benefit by using the metal salt to prevent pipe blockage, enabling continuous production
2Productivity
If methanesulfonic acid is used for trioxane production, then high yield is achieved, but continuous production becomes difficult due to equipment corrosion and pipe blockage
Solution Approach 1:
The metal salt acts as an intermediary that enables continuous production by preventing equipment corrosion and pipe blockage. It forms a protective barrier that allows the methanesulfonic acid to continue catalyzing trioxane formation without degrading the equipment, thus maintaining continuous production capability
Solution Approach 2:
The metal salt enables the continuous action of methanesulfonic acid catalysis by preventing equipment degradation. The protective film formed by the metal salt allows the catalytic process to continue indefinitely without interruption for equipment maintenance or replacement, achieving continuous production
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 solution enables continuous production of trioxane in high yield while preventing equipment corrosion and pipe blockage, ensuring stable and efficient trioxane production.
Implementation Method 1
a metal salt (C), wherein a total content of the formaldehyde (A) and the methanesulfonic acid (B) is less than 68 mass %, and the metal salt (C) contains at least one selected from a group consisting of a nitrate, a nitrite, and a persulfate
Implementation Method 2
a step of bringing formaldehyde into contact with a catalyst containing at least methanesulfonic acid; a step of performing a reaction to trimerize the formaldehyde to trioxane
Data Source
AI summary
A composition containing (A) 58.5 to 65.5 mass % of formaldehyde, (B) 0.7 to 4.5 mass % of methanesulfonic acid; and (C) less than 0.007 mass % of a metal salt, wherein a total content of the formaldehyde (A) and the methanesulfonic acid (B) is less than 68 mass %, and the metal salt (C) contains at least one selected from a group consisting of a nitrate, a nitrite, and a persulfate.