IZM-2 Zeolite Synthesis for Gas Separation
Solution Overview
Problem
The refining and petrochemical industries seek novel zeolitic structures for applications such as gas purification and separation, as existing microporous crystalline materials lack specific properties for these functions.
Innovation Solution
A novel crystalline solid, IZM-2, with a unique chemical composition and structure, is synthesized using an aqueous mixture containing silicon, aluminum, and an organic species with quaternary nitrogen atoms, followed by hydrothermal treatment, to produce a zeolitic material with specific X-ray diffraction peaks, suitable for use as an adsorbent or separation agent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing microporous crystalline materials are used, then the industry has established materials available, but they lack specific properties for gas purification and separation applications
Solution Approach 1:
The patent segments the existing microporous material landscape by introducing a distinct new zeolitic structure (IZM-2) with unique properties. This new structure is prepared from a specific gel composition with defined molar ratios of components, creating a segmented approach where different zeolitic structures can be selected for different applications based on their specific properties.
Solution Approach 2:
The patent applies parameter changes by precisely controlling the molar composition parameters of the gel mixture (specific ratios of water, oxide, organic species, and other components) and hydrothermal treatment parameters (temperature, time, pressure) to achieve the desired IZM-2 crystal structure with specific adsorption and separation properties.
2Reliability
If a novel crystalline structure IZM-2 is synthesized, then specific adsorption and separation capabilities are achieved, but the synthesis process requires precise control of multiple parameters
Solution Approach 1:
The patent systematically controls multiple synthesis parameters including the molar composition of the gel (water/oxide ratio, organic species content, oxide type and ratio), hydrothermal treatment temperature (100-200°C), and treatment time to reliably produce the IZM-2 structure with consistent adsorption and separation capabilities.
Solution Approach 2:
The patent uses an organic species containing quaternary nitrogen atoms as an intermediary or template during synthesis. This organic species mediates the formation of the IZM-2 crystal structure by organizing the inorganic components during hydrothermal treatment, and is subsequently removed to leave the desired porous structure.
3Productivity
If gel composition ratios are optimized, then crystallization efficiency is improved, but the preparation process becomes more complex
Solution Approach 1:
The patent optimizes crystallization efficiency by establishing specific parameter ranges for the gel composition, including water/oxide molar ratios (10-50), organic species/oxide molar ratios (0.01-0.5), and oxide compositions, along with hydrothermal treatment conditions. These optimized parameters enable efficient crystallization of IZM-2 while providing a reproducible preparation method.
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
IZM-2 exhibits a novel crystalline structure and composition, enabling effective adsorption and separation capabilities, potentially enhancing gas purification and separation processes in industrial applications.
Implementation Method 1
The present invention concerns a novel crystalline solid termed an IZM-2 crystalline solid... suitable for use as an adsorbent or separation agent
Implementation Method 2
The IZM-2 crystalline solid of the invention has an X ray diffraction diagram which includes at least the peaks set out in Table 1
Data Source
AI summary
The invention concerns a crystalline solid designated IZM-2, which has the X ray diffraction diagram given below. Said solid has a chemical composition expressed as the anhydrous base in terms of moles of oxides by the formula XO2:aY2O3:bM2/nO, in which X represents at least one tetravalent element, Y represents at least one trivalent element and M is at least one alkali metal and/or an alkaline-earth metal with valency n, a and b respectively representing the number of moles of Y2O3 and M2/nO; a is in the range 0 to 0.5 and b is in the range 0 to 1.