MOR-Type Zeolite Membrane for Branched Diolefin Separation
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Solution Overview
Problem
Conventional Ag—X-type zeolite membranes are unable to selectively separate branched diolefins from branched hydrocarbon mixtures containing hydrocarbons of equivalent carbon number but differing in carbon-carbon unsaturated bonds.
Innovation Solution
A zeolite membrane composite featuring a MOR-type zeolite with at least one transition metal ion, such as Ru, Pt, or Mo, ionically bonded at a cation site, is used to selectively separate branched diolefins from branched hydrocarbon mixtures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional Ag—X-type zeolite membrane is used, then separation of paraffin from monoolefin/paraffin mixed fluid is improved, but separation of branched diolefin from branched hydrocarbon mixture deteriorates
Solution Approach 1:
The patent changes the zeolite crystal structure parameter from X-type to MOR-type, which fundamentally alters the pore geometry and size distribution. This parameter change enables the membrane to selectively separate branched diolefins based on their unique molecular dimensions, resolving the limitation of Ag-X-type zeolites that cannot differentiate between branched hydrocarbons of equivalent carbon number
Solution Approach 2:
The invention creates a composite material system by combining MOR-type zeolite with specific metal ions (Ru, Pt, or Mo) at cation sites. This composite approach enhances the separation performance for branched diolefins by leveraging the synergistic effect of the zeolite framework structure and the electronic properties of transition metal ions, achieving selectivity that neither component could provide alone
2Productivity
If Ag—X-type zeolite is used for olefin/paraffin separation, then separation efficiency is improved, but ability to separate branched diolefin deteriorates
Solution Approach 1:
The patent changes the zeolite crystal structure parameter from X-type to MOR-type, which fundamentally alters the pore geometry and size distribution. This parameter change enables the membrane to selectively separate branched diolefins based on their unique molecular dimensions, resolving the limitation of Ag-X-type zeolites that cannot differentiate between branched hydrocarbons of equivalent carbon number
Solution Approach 2:
The invention introduces local quality enhancement by incorporating specific transition metal ions (Ru, Pt, Mo) at the cation sites within the MOR-type zeolite structure. This local modification creates specific interaction zones that enhance affinity for branched diolefin molecules, thereby improving separation selectivity without compromising the overall membrane productivity
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 enables the selective separation of branched diolefins from hydrocarbon mixtures, enhancing separation efficiency and allowing for the production of branched diolefins with low-energy methods.
Implementation Method 1
an X-MOR-type zeolite that is obtained by causing ionic bonding of a specific metal ion X at a cation site of a MOR-type zeolite
Implementation Method 2
a zeolite membrane composite that enables selective separation of a branched diolefin from a branched hydrocarbon mixture
Implementation Method 3
a zeolite membrane composite that enables selective separation of a branched diolefin from a branched hydrocarbon mixture
Implementation Method 4
a zeolite membrane formed of an X-MOR-type zeolite
Data Source
AI summary
A zeolite membrane composite includes a porous support and a zeolite membrane formed on at least one surface of the porous support. The zeolite membrane of the zeolite membrane composite is formed of an X-MOR-type zeolite, where X includes at least one type of transition metal ion.