Low-Sulfur Magnesium Silicate Binder for Methyl Methacrylate Catalyst
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional methods for producing methyl methacrylate by gas-phase catalytic reaction using methyl α-hydroxyisobutyrate result in the by-production of dimethyl ether (DME), which decreases the methanol recovery ratio and increases production costs, with catalyst life being short when using certain clay binders like bentonite and longer but with lower methanol recovery when using silica magnesia-based clays.
Innovation Solution
A molded catalyst comprising synthetic faujasite-type zeolite and a layered magnesium silicate compound with a sulfur content of 0.10% by weight or less, where the layered magnesium silicate compound is used as a binder, effectively suppresses DME production and maintains a high methanol recovery ratio while extending catalyst life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If silica magnesia-based clay is used as a binder to suppress diacetyl production, then catalytic activity is maintained for a long period, but DME by-production increases and methanol recovery ratio decreases
Solution Approach 1:
The invention changes the chemical composition parameters of the binder by strictly controlling sulfur content to 0.10% by weight or less. This parameter change in the binder's composition allows it to suppress both diacetyl production and DME by-production, resolving the contradiction between maintaining catalyst life and preserving methanol recovery ratio.
Solution Approach 2:
The invention creates a composite catalyst system combining synthetic faujasite-type zeolite with a specially formulated layered magnesium silicate compound binder that has controlled sulfur content. This composite material approach allows the binder to simultaneously suppress diacetyl and DME by-products while maintaining catalytic activity, overcoming the limitations of conventional binders.
2Stability of the object's composition
If conventional clay binders are used, then catalyst structure is maintained, but DME by-production occurs and methanol recovery ratio decreases
Solution Approach 1:
The invention changes the sulfur content parameter of the binder to 0.10% by weight or less, which fundamentally alters the binder's chemical behavior. This parameter change eliminates DME by-production while maintaining the catalyst's structural stability, as the low-sulfur layered magnesium silicate compound provides both structural support and selective catalysis.
3Reliability
If methanol is supplied to suppress ester group hydrolysis, then hydrolysis is suppressed, but DME by-production increases due to methanol dehydration
Solution Approach 1:
The low-sulfur layered magnesium silicate compound binder acts as an intermediary that selectively promotes the desired dehydration of methyl α-hydroxyisobutyrate while suppressing the unwanted dehydration of methanol. The controlled sulfur content in the binder creates specific active sites that facilitate ester group protection through methanol supply without generating DME by-products.
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 catalyst provides a higher methanol recovery ratio and longer catalyst life compared to conventional methods, optimizing the production of methyl methacrylate by reducing DME by-production and enhancing the overall efficiency of the process.
Implementation Method 1
A molded catalyst comprising synthetic faujasite-type zeolite and a layered magnesium silicate compound with a sulfur content of 0.10% by weight or less, where the layered magnesium silicate compound is used as a binder, effectively suppresses DME production and maintains a high methanol recovery ratio
Implementation Method 2
The method for producing methyl methacrylate by means of a gas-phase catalytic reaction using methyl α-hydroxyisobutyrate as a raw material
Data Source
AI summary
According to the present invention, a molded catalyst for use in the production of methyl methacrylate can be provided. The molded catalyst comprises synthetic faujasite-type zeolite and a layered magnesium silicate compound, wherein the sulfur content in the layered magnesium silicate compound is 0.10% by weight or less. According to the present invention, a method for producing methyl methacrylate can also be provided. The method is characterized by comprising a step of carrying out a gas-phase catalytic reaction of methyl α-hydroxyisobutyrate using the above-mentioned molded catalyst for use in the production of methyl methacrylate.