Solid Acid Catalyst for Cumene Hydroperoxide Decomposition
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Solution Overview
Problem
The current process for commercial phenol production using the cumene/air oxidation to cumene hydroperoxide route is costly due to the use of liquid mineral acids as catalysts, leading to significant by-product formation and waste streams, and there is a need for a more efficient method to decompose cumene hydroperoxide into phenol and acetone with reduced by-product formation.
Innovation Solution
The process employs solid acid catalysts, specifically layered and non-layered catalyst particles with an inner core and an outer acidic layer, to decompose cumene hydroperoxide into phenol and acetone, replacing the use of liquid mineral acids and minimizing undesirable by-products through selective catalysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If liquid mineral acid (H2SO4) is used as catalyst for CHP decomposition, then phenol and acetone production is achieved, but by-product formation increases and waste streams are generated
Solution Approach 1:
The invention changes the physical state of the catalyst from liquid (mineral acid H2SO4) to solid (amorphous aluminosilicate), fundamentally altering the catalyst properties to eliminate the harmful effects of liquid acid while maintaining catalytic activity for phenol and acetone production
Solution Approach 2:
The invention uses amorphous aluminosilicate catalyst particles that can be considered composite materials with controlled composition (SiO2/Al2O3 ratio of 2-20) to achieve both high catalytic activity and selectivity, producing phenol and acetone with minimal by-products
2Power
If liquid acid catalyst is used for CHP decomposition, then reaction catalysis is achieved, but neutralization and purification costs increase
Solution Approach 1:
The invention changes the catalyst from liquid acid requiring neutralization to solid acid catalyst that does not require neutralization, eliminating the associated costs and simplifying the manufacturing process
Solution Approach 2:
The solid acid catalyst can be easily separated from the reaction mixture and reused, eliminating the need for expensive neutralization agents and purification processes required for liquid acid catalysts
3Object-generated harmful factors
If solid acid catalyst is used to reduce by-product formation, then selectivity improves, but catalyst activity must be maintained
Solution Approach 1:
The invention optimizes the composition parameters of the amorphous aluminosilicate (SiO2/Al2O3 ratio, water content, metal oxide additions) to achieve the right balance between catalytic activity and selectivity, producing phenol and acetone with minimal by-products
Solution Approach 2:
The invention creates catalyst particles with specific local properties - amorphous structure with controlled pore distribution and acid site characteristics - to achieve high selectivity for phenol and acetone while maintaining sufficient catalytic activity
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 approach enhances the selectivity and stability of the reaction, reducing by-product formation and waste streams, while achieving high yields of phenol and acetone, thus lowering production costs and improving process efficiency.
Implementation Method 1
contacting the process stream with catalyst particles to form a product stream, the catalyst particles having an inner core, an outer layer of an acidic material bonded to the inner core
Data Source
AI summary
The present invention provides a process for decomposing a cumene hydroperoxide to produce phenol and acetone. The process utilizes a solid catalyst that can be non-layered or layered. The process includes: (1) introducing a process stream containing cumene hydroperoxide into a reaction vessel; (2) contacting the process stream with catalyst particles to form a process stream; and (3) withdrawing a portion of the product stream from the reactor and recovering phenol and acetone products.