Partial Condenser in Vacuum Distillation for IPDA Purification
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Solution Overview
Problem
Current methods for purifying isophoronediamine require high energy inputs for heating and cooling due to inefficient distillation processes, which need to be optimized for reduced energy consumption.
Innovation Solution
Incorporating a partial condenser in the first vacuum distillation column of a two-stage distillation setup to pre-cool and condense vapor streams, allowing for more efficient separation and recycling of reflux, thereby reducing energy requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional vacuum distillation columns are used for purifying isophoronediamine, then the purification can be achieved, but high energy inputs for heating and cooling are required
Solution Approach 1:
The patent applies preliminary action by introducing a partial condenser before the main distillation column to pre-cool and partially condense the vapor stream. This preliminary condensation reduces the thermal load on the main distillation column, thereby reducing the heating and cooling energy requirements while maintaining the purification effectiveness of the isophoronediamine.
Solution Approach 2:
The patent utilizes phase transitions by employing a partial condenser that converts a portion of the vapor stream into liquid through controlled condensation. This phase change occurs at an intermediate temperature, enabling energy-efficient heat recovery and reducing the overall energy input required for the distillation process while achieving high purity separation.
2Use of energy by moving object
If a partial condenser is added to the distillation system, then energy requirements are reduced, but device complexity increases
Solution Approach 1:
The patent applies merging by integrating the partial condenser directly into the existing distillation column structure, combining the condensation function with the distillation process. This integration allows energy reduction without requiring a completely separate system, thus limiting the increase in device complexity while achieving the desired energy efficiency.
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 use of a partial condenser in the first vacuum distillation column significantly lowers the heating and cooling power needed, achieving a 15% reduction in energy consumption while maintaining high purity of isophoronediamine at 99.95%.
Implementation Method 1
the use of a partial condenser in the first vacuum distillation column to pre-cool and condense vapor streams
Implementation Method 2
the crude isophoronediamine is subjected to a fine purification via two vacuum distillation columns
Data Source
AI summary
A process for fine purification of isophoronediamine (IPDA), including producing IPDA by aminating hydrogenation of isophorone nitrile in the presence of at least ammonia, hydrogen, a a hydrogenation catalyst and optionally further additions to obtain a crude IPDA, and subjecting the crude IPDA to a fine purification via two vacuum distillation columns, wherein in the first vacuum distillation column the removal of any remaining relatively low-boiling byproducts is effected and in the second vacuum distillation column the IPDA is obtained in pure form as tops and thus separated from the organic residues, and wherein the first vacuum distillation column has vacuum distillation column has a partial condenser fitted to it.