Bimetallic Catalyst for O-Phenylphenol Selectivity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current catalysts for synthesizing ortho-phenylphenol (OPP) suffer from low selectivity and stability, particularly metal alloy and supported non-noble metal catalysts, which result in insufficient service life and catalytic activity for industrial production.
Innovation Solution
A catalyst composition comprising a carrier with platinum as the first active metal, a second active metal from transition metals of groups VIB and VIIIB, and a catalytic promoter such as a metal salt or hydroxide, which increases the dispersity of platinum and maintains high conversion and selectivity rates over a long period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If metal alloy catalysts are used for dehydrogenation of cyclohexanone dimer, then catalytic activity is achieved, but selectivity of OPP decreases and stability deteriorates due to cementation during reaction
Solution Approach 1:
The patent changes the compositional parameters of the catalyst by introducing a specific bimetallic system (Pt and Ni, Pt and Pd, or Pt and Ir) with controlled weight ratios. This parameter modification prevents cementation while maintaining high catalytic activity and selectivity, resolving the stability issue of metal alloy catalysts.
Solution Approach 2:
The patent employs composite catalyst materials combining platinum with transition metals from groups VIB and VIIIB. This composite structure prevents cementation of the platinum component while maintaining high catalytic activity, thereby improving both selectivity and stability simultaneously.
2Ease of manufacture
If supported non-noble metal catalysts are used, then cost is reduced, but catalytic activity and reactivity remain insufficient for industrial production
Solution Approach 1:
The patent modifies the catalyst composition by introducing platinum as an active component, fundamentally changing the parameter of metal composition. This enables the catalyst to achieve industrial-level catalytic activity while maintaining cost-effectiveness through the use of platinum group metals with high activity.
Solution Approach 2:
The patent uses platinum, a noble metal with well-known catalytic properties, as an active component to replicate the high performance of traditional noble metal catalysts while achieving better stability and selectivity, effectively copying the success of conventional catalysts with improved characteristics.
3Productivity
If noble metal catalysts with platinum and palladium are used, then conversion rate and selectivity are initially high, but service life is insufficient due to catalyst deactivation over time
Solution Approach 1:
The patent changes the compositional parameters by using platinum combined with specific transition metals (Ni, Pd, or Ir) in controlled ratios. This parameter modification prevents catalyst deactivation and extends service life while maintaining high conversion rates and selectivity over extended periods.
Solution Approach 2:
The patent employs composite catalyst materials with platinum and transition metals from groups VIB and VIIIB. This composite structure prevents the deactivation that occurs in single-metal noble metal catalysts, thereby extending service life while maintaining high productivity.
4Manufacturing precision
If catalyst promoters are added to increase catalytic activity, then selectivity is improved initially, but conversion rate and yield decrease over time due to catalyst deactivation
Solution Approach 1:
The patent modifies the catalyst composition by incorporating platinum with specific transition metals in controlled weight ratios. This parameter change achieves both high selectivity and sustained conversion rate over time, eliminating the trade-off between selectivity and productivity that occurs with traditional promoted catalysts.
Solution Approach 2:
The patent uses composite catalyst materials combining platinum with transition metals from groups VIB and VIIIB. This composite structure simultaneously provides high selectivity and maintains high conversion rates over extended periods, resolving the contradiction between manufacturing precision and 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
The catalyst composition achieves a conversion rate of 99.97% to 100% for cyclohexanone dimer and maintains selectivity above 90%, significantly extending the service life and stability, making it suitable for industrial production with a broader range of reaction conditions.
Implementation Method 1
a catalyst composition for preparing ortho-phenylphenol (OPP)... a first active metal, a second active metal and a catalytic promoter carried by the carrier... performing a dehydrogenation reaction of such dimer is performed, and thereby obtaining the product OPP
Data Source
AI summary
A catalyst composition for preparing o-phenylphenol is provided. The catalyst composition includes a carrier; and a first active metal, a second active metal, and a catalytic promoter carried by the carrier. The first active metal is platinum, and the second active metal is selected from the first, second and third rows of transition metals of groups VIB and VIIIB. The present disclosure utilizes the carrier to carry the first active metal, the second active metal and the catalytic promoter so as to increase the selectivity of o-phenylphenol and the service life of a catalyst.