(Poly)alkylphenol Synthesis via Heterogeneous Catalyst Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for producing (poly)alkylphenols, such as 2,3,6-trimethylphenol, are complex and non-selective, relying on non-renewable sources like coal tar and posing health risks, necessitating a more efficient and environmentally friendly alternative.
Innovation Solution
A process involving the reduction of a compound using a heterogeneous metal catalyst, specifically Ni, Fe, Ir, Pd, Pt, Rh, or Ru, in the presence of a reducing agent like molecular hydrogen or formic acid, to yield high-yield (poly)alkylphenols with flexibility in product variation and low environmental impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional catalytic alkylation with methanol or condensation methods are used to synthesize (poly)alkylphenols, then the production can be achieved, but the process becomes very complex and non-selective
Solution Approach 1:
The patent changes the chemical parameters of the reaction system by using formic acid or formate salts as reducing agents with heterogeneous metal catalysts (Ni, Fe, Ir, Pd, Pt, Rh, Ru) instead of traditional alkylation reagents. This parameter change simplifies the reaction pathway and improves selectivity while maintaining high productivity in the reduction process
2Quantity of substance
If extraction from coal tar is used to obtain (poly)alkylphenols, then the products can be obtained, but the source becomes non-renewable and critical for labour health
Solution Approach 1:
The patent changes the source material parameter by using readily available, renewable substrates such as phenols and their derivatives instead of coal tar. This parameter change maintains product availability while eliminating the harmful associations with non-renewable resources and labor health risks
Solution Approach 2:
The patent converts the traditional harmful extraction process from coal tar into a beneficial reduction process using green chemistry principles. By using formic acid/formate salts as reducing agents with heterogeneous metal catalysts, the process transforms a harmful extraction method into an environmentally friendly synthesis route that maintains product availability
3Manufacturing precision
If traditional synthesis methods are used for 2,3,6-trimethylphenol, then the intermediate can be produced, but the process becomes very complex and non-selective
Solution Approach 1:
The patent changes the reaction mechanism parameter by using reduction chemistry instead of alkylation or condensation. The use of formic acid or formate salts with heterogeneous metal catalysts creates a selective reduction pathway that directly produces 2,3,6-trimethylphenol with high manufacturing precision and minimal byproducts
Solution Approach 2:
The patent introduces formic acid or formate salts as intermediary reducing agents that mediate the transformation of substituted phenols to (poly)alkylphenols. This intermediary approach simplifies the synthesis pathway and improves selectivity compared to direct alkylation or condensation methods
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 process efficiently produces (poly)alkylphenols with high yield and flexibility, reducing environmental impact and offering a safer alternative to traditional methods, suitable for use in various industrial applications including pharmaceuticals and cosmetics.
Implementation Method 1
a process of reducing a compound of formula (I') by a reducing agent in the presence of a heterogeneous metal catalyst to yield a compound of formula (A')
Implementation Method 2
In one preferred embodiment of the invention the reducing agent is molecular hydrogen. In other words, in one embodiment the compound of formula (I') is hydrogenated by molecular hydrogen in the presence of a heterogeneous metal catalyst.
Implementation Method 3
a process of reducing a compound of formula (I') by a reducing agent in the presence of a heterogeneous metal catalyst to yield a compound of formula (A')
Data Source
AI summary
The present invention relates to the manufacturing and use of (poly)alkylphenols. They can be prepared from 2-(methoxymethyl)phenols by catalytic reduction in a high efficiency and selectivity.