Double Metal Cyanide Catalyst Acetate Complexing Agent
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Solution Overview
Problem
Conventional double metal cyanide catalysts have high environmental impact due to excessive organic complexing agents, complex synthesis processes, and low economic efficiency, leading to difficulties in controlling functional groups and producing high-grade polyurethane materials.
Innovation Solution
A double metal cyanide catalyst comprising a polyether compound, a metal salt, and an organic complexing agent with an acetate or tartrate group, which reduces the amount of organic complexing agent used, simplifies the process, and enhances catalytic activity, allowing for the preparation of polycarbonate polyether polyols with low unsaturation and high carbonate content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional double metal cyanide catalysts are used, then catalytic activity is improved, but environmental pollution increases due to excessive organic complexing agents
Solution Approach 1:
The patent changes the chemical composition parameters by replacing conventional organic complexing agents with carboxylic acid salts (acetic acid, propionic acid, butyric acid) and their esters. This parameter change maintains the catalyst's ability to activate CO2 while significantly reducing environmental pollution, as these alternative complexing agents are more environmentally friendly and can be used in smaller amounts.
Solution Approach 2:
The patent discards the harmful excessive organic complexing agents from the catalyst system. By eliminating these polluting substances and replacing them with environmentally benign carboxylic acid salts and esters, the invention removes the source of environmental pollution while preserving catalytic function.
2Power
If conventional double metal cyanide catalysts are used, then catalytic activity is improved, but manufacturing complexity increases due to complicated synthesis process
Solution Approach 1:
The patent extracts and removes the complicated synthesis procedures associated with conventional catalyst preparation. By using simple mixing of metal cyanide salts with carboxylic acid salts or esters in solvents like water or alcohol, the invention eliminates complex multi-step synthesis processes while maintaining catalyst effectiveness.
Solution Approach 2:
The patent segments the catalyst preparation into simple, independent steps: dissolving metal cyanide salt in solvent, adding carboxylic acid salt or ester, and filtering. This segmentation transforms a complicated unified synthesis process into simple, manageable steps that are easier to execute and control.
3Power
If conventional double metal cyanide catalysts are used, then catalytic activity is improved, but manufacturing time increases due to long manufacturing process
Solution Approach 1:
The patent applies preliminary action by pre-dissolving the metal cyanide salt in the solvent before adding the carboxylic acid salt or ester. This preliminary preparation simplifies the overall process and reduces total manufacturing time, as the components are ready for immediate reaction without additional preparation steps.
Solution Approach 2:
The patent skips intermediate purification and complex processing steps that are typically required in conventional catalyst synthesis. By using the simple mixing approach with carboxylic acid salts and esters, the invention rushes through the manufacturing process quickly, obtaining functional catalyst without time-consuming intermediate steps.
4Productivity
If double metal cyanide catalyst is used, then addition reaction rate of cyclohexene oxide or propylene oxide is improved, but functional group control in end product becomes difficult
Solution Approach 1:
The patent changes the chemical environment parameters by introducing carboxylic acid salts and esters that create a specific reaction environment. This parameter change promotes high addition reaction rates while simultaneously providing better control over functional groups in the end product, likely through the specific coordination chemistry these compounds provide.
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 excellent catalytic activity with a short induction time, is environmentally friendly, and simplifies the production process, resulting in high-quality polycarbonate polyether polyols suitable for producing high-grade polyurethane materials.
Implementation Method 1
a method for producing polycarbonate by copolymerizing carbon dioxide and an epoxy compound in the presence of a double metal cyanide catalyst
Implementation Method 2
an organic complexing agent having an acetate group or a tartrate group
Data Source
AI summary
The present invention relates to a double metal cyanide catalyst comprising a polyether compound, a metal salt, a metal cyanide salt, and an organic complexing agent having an acetate group or a tartrate group; a preparation method therefor; and a method for preparing a polycarbonate polyether polyol by copolymerizing carbon dioxide and an epoxy compound in the presence of the catalyst. According to the present invention, the double metal cyanide catalyst has excellent in catalytic activity and has a short catalytic activity induction time, according to an embodiment of the present invention, the process for preparing the catalyst of the present invention is eco-friendly and simple in process, since an amount of the organic complexing agent to be used is small, and has a simple process.