Titanocene Catalyst Composition for Polymer Hydrogenation
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Solution Overview
Problem
Current catalysts for hydrogenation, both heterogeneous and homogeneous systems, face inefficiencies such as high catalyst amounts required, high temperatures, and pressures, poor stability, and difficulty in separating catalysts, especially when hydrogenating polymers with steric hindrance and unsaturated double bonds.
Innovation Solution
A catalyst composition comprising a titanocene compound, an organic metal compound, an unsaturated polymer, and a polar compound, with specific mass ratios, that facilitates high activity, low viscosity, and easy separation, while maintaining storage stability and non-coloration properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If homogeneous catalysts are used for hydrogenation, then hydrogenation activity is improved and reaction conditions are milder, but catalyst preparation becomes complex and storage stability is insufficient
Solution Approach 1:
The patent combines a metallocene compound (catalyst component) with a specific polymer (support material) to create a composite catalyst system. This merging integrates the high activity of homogeneous catalysts with the ease of handling and stability of heterogeneous systems, resolving the contradiction between activity and preparation complexity
Solution Approach 2:
The invention uses a composite material consisting of a metallocene compound coordinated with a polymer containing specific functional groups. This composite structure provides both the high catalytic activity of metallocenes and the stability and ease of separation characteristic of polymer-supported catalysts
2Ease of operation
If heterogeneous catalysts are used for hydrogenation, then catalyst separation is simplified, but hydrogenation activity decreases and reaction requires high temperature and pressure
Solution Approach 1:
The patent merges the advantages of heterogeneous catalysts (easy separation) with homogeneous catalysts (high activity) by immobilizing a metallocene compound on a polymer support. The resulting composite catalyst can be easily separated while maintaining high hydrogenation activity under mild conditions
3Quantity of substance
If catalyst amount is reduced for economic efficiency, then production cost decreases, but hydrogenation activity and reaction rate are insufficient
Solution Approach 1:
The patent changes the chemical parameters of the catalyst system by using a metallocene compound with specific ligand structures and coordinating it with polymers containing electron-donating groups. This parameter optimization enhances catalytic activity per unit catalyst, allowing reduced catalyst amounts while maintaining high productivity
4Reliability
If polymer hydrogenation is performed, then stability and heat resistance are improved, but viscosity effects and steric hindrance make hydrogenation more difficult
Solution Approach 1:
The patent applies local quality by using a polymer support with specific local chemical environments (electron-donating groups) that create favorable microenvironments for catalysis. This local optimization enhances catalytic activity while the overall polymer structure provides stability and manages viscosity effects
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 composition achieves high hydrogenation activity, low viscosity, good feed properties, and excellent storage stability, effectively hydrogenating olefinic unsaturated double bonds with improved heat resistance and oxidation resistance in polymers.
Implementation Method 1
A catalyst composition for hydrogenation comprising (A), (B), (C), and (D) shown below, wherein a mass ratio of the (D) to the (A) ((D)/(A)) is in a range of 0.01 to 2.00
Implementation Method 2
catalyst composition for hydrogenation which comprises (A) a titanocene compound represented by general formula (1), (B) a compound containing a predetermined element, (C) a specific unsaturated polymer, and (D) a polar compound
Data Source
AI summary
A catalyst composition for hydrogenation including (A) to (D), in which a mass ratio (D) / (A) is 0.01 to 2.00. (A): a titanocene compound represented by following formula (1), (wherein R5 and R6 are selected from the group consisting of hydrogen, a hydrocarbon group having 1 to 12 carbon atoms, an aryloxy group, an alkoxy group, a halogen group, and a carbonyl group, and R1 and R2 are selected from hydrogen and a hydrocarbon group having 1 to 12 carbon atoms) (B): a compound containing an element selected from Li, Na, K, Mg, Zn, Al, and Ca, (C): an unsaturated polymer having a fraction of an olefinic unsaturated double bond content of side chains based on a total olefinic unsaturated double bond content of 0.25 to 1.0, and (D): a polar compound.