Mesoporous Iron Copper Catalyst for Long Chain Alcohol Production
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Solution Overview
Problem
Conventional hydroformylation processes for producing long chain alcohol from carbon monoxide and molecular hydrogen require high temperatures and pressures, are sensitive to the type of olefin in the feed, and face challenges in catalyst recovery due to the boiling points of reaction products and by-products, limiting selectivity and efficiency.
Innovation Solution
A process using mesoporous catalysts with copper and iron, having a surface area of ≥50 m2/g, operating at ≤250°C and ≤5 MPa, with a molar ratio of carbon monoxide to molecular hydrogen, and a catalyst composition of ≥0.5 wt.% iron, ≤1.0 wt.% CuO, and ≤1.0 wt.% Fe3O4, to enhance selectivity and conversion of long chain alcohol production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional hydroformylation catalysts (e.g., HCo(CO)4) are used, then long chain alcohol can be produced, but high temperature (≥140°C) and high pressure (≥24 MPa) are required
Solution Approach 1:
The patent changes the physical and chemical parameters of the catalyst system by using supported metal catalysts (Rh, Ir, or Ru on supports like alumina, silica, or activated carbon) instead of conventional HCo(CO)4, enabling the reaction to proceed at lower temperatures (≤100°C) and pressures (≤10 MPa) while maintaining productivity
Solution Approach 2:
The patent employs composite catalyst materials consisting of noble metals (Rh, Ir, or Ru) supported on various carriers (alumina, silica, activated carbon, or polymer supports). This composite structure enhances catalytic activity and selectivity, allowing reduced reaction conditions while achieving comparable or superior alcohol production
2Productivity
If conventional hydroformylation catalysts are used, then long chain alcohol can be produced, but high pressure (≥24 MPa) is required
Solution Approach 1:
The patent changes the pressure parameter by introducing supported noble metal catalysts that operate effectively at lower pressures (≤10 MPa, preferably ≤5 MPa). The supported catalyst structure provides higher catalytic efficiency per unit pressure, eliminating the need for extreme pressure conditions while maintaining production rates
Solution Approach 2:
The composite catalyst system (noble metal on support) creates a highly efficient catalytic interface that maximizes reaction rate at reduced pressure. The support material provides high surface area and stability, allowing the noble metal particles to function at lower partial pressures of CO and H2
3Ease of manufacture
If cobalt catalyst is used to lessen costs, then catalyst cost is reduced, but selectivity for linear aldehyde decreases
Solution Approach 1:
The patent changes the chemical composition parameter by replacing cobalt with noble metals (Rh, Ir, or Ru) that inherently provide superior linear aldehyde selectivity. This composition change resolves the selectivity issue while the supported structure and optimized conditions maintain cost-effectiveness through reduced pressure and temperature requirements
Solution Approach 2:
The patent uses composite catalysts where noble metals (particularly Rh on alumina or silica) provide high linear selectivity. The composite structure optimizes the dispersion and electronic state of the noble metal, maximizing selectivity while the support material provides mechanical stability and ease of handling
4Productivity
If conventional hydroformylation process is used, then long chain alcohol can be produced, but catalyst recovery complexity increases due to similar boiling points
Solution Approach 1:
The patent extracts the catalyst from the reaction mixture by using supported catalysts that can be easily separated from the liquid phase product. The solid support allows simple filtration or decantation to remove the catalyst, eliminating the complex distillation processes needed when catalyst and product have similar boiling points
Solution Approach 2:
The patent employs porous support materials (alumina, silica, activated carbon) with controlled pore sizes that allow product diffusion while retaining the catalyst particles. This porous structure enables easy catalyst separation through filtration while maintaining high catalytic activity, simplifying the recovery process
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 process achieves a feed carbon monoxide conversion >45%, 1-alcohol selectivity >40%, and an Anderson-Shulz-Flory Chain Growth Probability (α) >0.74, improving performance over conventional catalysts and allowing for efficient production of long chain alcohol at reduced pressures and temperatures.
Implementation Method 1
A process using mesoporous catalysts with copper and iron, having a surface area of ≥50 m2/g, operating at ≤250°C and ≤5 MPa
Data Source
AI summary
The invention relates to long chain alcohol, to processes for catalytically producing long chain alcohol from carbon monoxide and molecular hydrogen, to equipment useful in such processes, and to the use of long chain alcohol, e.g., for producing fuel, lubricating oil, detergent, and plasticizer. The catalyst is mesoporous and comprises iron and copper.