Soluble Support Catalyst for Diene Polymer Hydrogenation
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Solution Overview
Problem
Conjugated diene polymers used in various applications face instability due to residual unsaturated double bonds, which are difficult to hydrogenate efficiently using existing catalysts, leading to issues like high temperature and pressure requirements, catalyst retention, and limited utility in exterior materials.
Innovation Solution
A catalyst composition comprising a titanium compound, a chain or cyclic structure compound, and an organic metallic compound is used for hydrogenating conjugated diene polymers, allowing for selective hydrogenation at lower temperatures and pressures with improved catalyst stability and ease of removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If heterogeneous catalysts are used for hydrogenation, then catalyst removal is easier, but hydrogenation activity is lower and requires higher temperature and pressure
Solution Approach 1:
The patent introduces a soluble support compound as an intermediary carrier for the metal complex catalyst. This support compound dissolves in the reaction system, allowing the metal complex to function as a homogeneous catalyst with high activity while the support structure provides a framework for easier catalyst separation and recovery, thus resolving the contradiction between catalyst removal ease and hydrogenation activity.
Solution Approach 2:
The patent creates a composite catalyst system combining a metal complex (such as rhodium, ruthenium, or palladium complexes) with a soluble support compound. This composite structure integrates the high catalytic activity of metal complexes with the separation advantages of supported catalysts, enabling both high hydrogenation activity and easier catalyst removal through filtration or other separation methods.
2Productivity
If homogeneous catalysts are used for hydrogenation, then hydrogenation activity is higher, but catalyst removal becomes more difficult and energy-consuming
Solution Approach 1:
The soluble support compound acts as an intermediary that allows the homogeneous metal complex catalyst to be introduced into the reaction system in a form that facilitates subsequent separation. The support compound forms a complex with the metal center that maintains catalytic activity while providing structural features that enable easier removal, thus resolving the contradiction between high activity and difficult removal.
Solution Approach 2:
The patent modifies the physical and chemical parameters of the catalyst system by changing from traditional homogeneous catalysts to metal complexes supported on soluble compounds. This parameter change includes modifying the solubility, molecular weight, and structural properties of the catalyst, which enables the catalyst to maintain high activity while becoming amenable to removal through standard separation techniques.
3Productivity
If high temperature and pressure are applied for hydrogenation, then hydrogenation efficiency improves, but polymer decomposition and gelation occur
Solution Approach 1:
The patent fundamentally changes the reaction parameters by using a soluble support compound that enables effective hydrogenation at lower temperatures and pressures. The unique properties of the soluble support allow the reaction to proceed efficiently under milder conditions, thus improving hydrogenation efficiency while preventing polymer decomposition and gelation that occur at high temperature and pressure.
4Manufacturing precision
If high concentration of catalyst is used for homogeneous hydrogenation, then hydrogenation completeness improves, but product instability increases due to catalyst presence
Solution Approach 1:
The soluble support compound serves as an intermediary that allows the catalyst to be present in sufficient quantities for complete hydrogenation while providing a structural framework that facilitates catalyst separation. This intermediary structure enables the system to achieve high hydrogenation completeness and then allows for easy removal of the catalyst, thereby maintaining product stability.
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 method enables rapid and reproducible hydrogenation of conjugated diene polymers over a wide range of temperatures and pressures, enhancing economic efficiency and stability, making it suitable for mass production.
Implementation Method 1
catalyst composition comprising a titanium compound, a chain or cyclic structure compound, and an organic metallic compound is used for hydrogenating conjugated diene polymers
Implementation Method 2
A catalyst composition comprising a titanium compound, a chain or cyclic structure compound, and an organic metallic compound is used for hydrogenating conjugated diene polymers
Data Source
AI summary
A catalyst composition and a method for hydrogenating a polymer having a conjugated diene are provided. The catalyst composition includes (a) a first composition having one of a bis(cyclopendienyl, fluorenyl, indenyl and derivatives thereof) titanium compound and a mixture thereof; (b) a second composition having one selected from the group consisting of a first compound of a formula (II), a second compound of a formula (III) and a mixture thereof:wherein the formula (II) has a chain structure, the formula (III) has a cyclic structure, the R is C1˜C12 alkyl, the X1 and X2 are ones selected from the group consisting of C1˜C12 alkyl, C1˜C12 cycloalkoxy, aryl, C1˜C12 alkyl aryl and carbonyl, and n>1 and m>2; and (c) a third composition having an organic metallic compound.