Hydrohalide Tertiary-Amino Resin Catalysts for Easy Separation
Solution Overview
Problem
Existing catalysts for organic synthesis, such as strong anion exchange resins and homogenous catalysts, suffer from inadequate catalytic activity and difficulty in separating from the reaction system, hindering efficient synthesis of organic compounds.
Innovation Solution
An anion exchange resin with a hydrohalide salt of a tertiary amino group as the ion exchange group is used as a catalyst, enabling easy solid-liquid separation and high-efficiency synthesis of organic compounds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If strong anion exchange resins with quaternary ammonium groups are used as catalysts, then catalytic activity is improved, but separation from the reaction system becomes difficult
Solution Approach 1:
The patent changes the chemical parameter of the ion exchange group from quaternary ammonium (strong base) to tertiary amino group (weak base), and specifically introduces a hydrohalide salt form. This parameter change maintains catalytic activity for cyclic carbonate synthesis while enabling easy separation through solid-liquid separation, resolving the contradiction between catalytic performance and separation ease.
2Reliability
If homogenous catalysts are used, then catalytic activity is improved, but removal from the reaction system becomes problematic
Solution Approach 1:
The patent uses a resin support as an intermediary carrier to immobilize the tertiary amino group catalyst. This transforms the homogenous catalyst into a heterogeneous system where the active catalytic species is attached to a solid support, maintaining high catalytic activity while enabling easy separation through filtration or decantation, thus resolving the removal problem.
3Ease of manufacture
If weak anion exchange resins with tertiary amino groups are used, then separation becomes easy, but catalytic activity becomes inadequate
Solution Approach 1:
The patent introduces a specific parameter modification - converting the tertiary amino group to its hydrohalide salt form. This chemical modification enhances the catalytic activity of the weak base resin while preserving the solid-liquid separation advantage, thereby resolving the contradiction between ease of separation and catalytic effectiveness.
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 catalyst exhibits superior catalytic activity and can be easily separated from the reaction system, allowing for high-efficiency synthesis of organic compounds like cyclic carbonates and oxazolidinones.
Implementation Method 1
anion exchange resin having a hydrohalide salt of a tertiary amino group as an ion exchange group
Data Source
AI summary
Provided are: a catalyst for organic synthesis use, which has a high catalytic activity, can be easily separated by solid/liquid separation from a reaction system, and enables highly efficient synthesis of an organic compound; and a method for producing an organic compound using the catalyst. This catalyst for organic synthesis use includes an anionic exchange resin that has a hydrohalic acid salt of a tertiary amino group as an ion exchange group. This method for producing an organic compound uses, as a catalyst, an anionic exchange resin that has a hydrohalic acid salt of a tertiary amino group as an ion exchange group.