Phenol Purification via Azeotropic Distillation Ratio Optimization
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Solution Overview
Problem
The existing methods for purifying phenol using cumene as a raw material are energy-intensive and result in significant heat source loss due to the consumption of steam, necessitating a method that minimizes steam usage and maximizes energy efficiency.
Innovation Solution
The method involves passing impurities through a series of distillation columns, optimizing the phenol-to-water ratio in the azeotropic distillation process, and reusing phenolic steam to preheat columns, thereby reducing energy consumption and heat source loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If azeotropic distillation is performed with conventional phenol-to-water ratio in multiple distillation columns, then hydrocarbon separation is achieved, but heat source loss occurs due to uncondensed vapor and steam consumption is high
Solution Approach 1:
The patent optimizes the phenol-to-water ratio parameter in the azeotropic distillation process to a specific range (60:40 to 65:35), which changes the vapor composition and condensation behavior, thereby reducing heat source loss while maintaining purification efficiency
Solution Approach 2:
The patent implements a feedback mechanism by recycling uncondensed vapor back into the distillation column, creating a closed-loop system that recovers heat source and improves energy efficiency while maintaining continuous operation
2Manufacturing precision
If high pressure and multiple distillation columns are used for hydrocarbon removal, then separation performance is improved, but energy consumption increases significantly
Solution Approach 1:
The patent changes the operational parameters including pressure conditions and phenol-to-water ratio to optimize the distillation process, achieving high separation performance with reduced energy consumption by operating at optimized pressure points and utilizing heat recovery
Solution Approach 2:
The patent converts the harmful uncondensed vapor that causes heat source loss into a beneficial resource by recycling it back into the distillation column, transforming energy waste into useful heat source for the purification 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
This approach minimizes heat source loss, reduces steam usage, and enhances energy efficiency in the phenol purification process by optimizing the separation of hydrocarbons and reusing phenolic steam as a heat source.
Implementation Method 1
performing azeotropic distillation, wherein a ratio of phenol and water at the uppermost distillation column in which the azeotropic distillation is performed is from 60:40 to 65:35, in order to optimize separation of the hydrocarbon
Data Source
AI summary
Disclosed is a method for purifying phenol, by which the loss of a heat source is minimized, the amount used of steam is decreased, and efficiency of energy consumed in a process may be maximized. The method for purifying phenol includes a step of passing impurities including phenol, acetone and hydrocarbon, which are prepared using cumene as a raw material, via a plurality of distillation columns one by one, and performing azeotropic distillation, wherein the ratio of phenol and water at the uppermost end of the distillation column where the azeotropic distillation is performed, is from 60:40 to 65:35, for the optimized separation of the hydrocarbon.