Device and method for continuously producing catalysts based on low-temperature coprecipitation
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Solution Overview
Problem
There is a lack of devices and methods for continuous industrial production of catalysts using low-temperature coprecipitation, which is essential for producing catalysts with high specific surface area and high catalytic activity, as existing methods are not scalable or efficient for large-scale industrial use.
Innovation Solution
A device comprising a metal salt preparation kettle, primary and secondary reaction kettles, a precipitant preparation kettle, a circulating refrigeration system, and an automatic control system, which allows for continuous low-temperature coprecipitation by controlling the transfer of non-aqueous solvent and water, heating, stirring, and refrigeration to maintain a constant low temperature, enabling the continuous production of catalysts with high specific surface area and catalytic activity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If low-temperature coprecipitation method is used to produce catalysts, then catalysts with high specific surface area and high catalytic activity are obtained, but continuous industrial production capability is lacking
Solution Approach 1:
The system divides the coprecipitation process into separate functional modules: a metal salt preparation kettle for dissolving metal salts, a precipitant preparation kettle for preparing precipitant solutions, and a reaction kettle for the actual coprecipitation reaction. This segmentation allows each module to operate continuously and independently, enabling scalable industrial production while maintaining the low-temperature conditions necessary for high specific surface area catalyst synthesis.
Solution Approach 2:
The patent implements continuous operation through multiple kettles that can work in sequence or parallel. The metal salt and precipitant preparation kettles can continuously prepare solutions that are fed into the reaction kettle, eliminating batch-to-batch interruptions. The circulating refrigeration system maintains continuous low-temperature conditions, ensuring the coprecipitation process operates continuously to produce catalysts with consistent high specific surface area.
2Manufacturing precision
If low-temperature conditions are maintained during coprecipitation, then catalysts with high catalytic activity are produced, but refrigeration efficiency and energy consumption become critical challenges
Solution Approach 1:
The system pre-cools the metal salt solution and precipitant solution separately in their respective preparation kettles before they enter the reaction kettle. This preliminary cooling reduces the thermal load on the reaction kettle's refrigeration system, improving overall refrigeration efficiency. The circulating refrigeration system continuously circulates coolant through heat exchange jackets surrounding the kettles, maintaining stable low-temperature conditions without excessive energy consumption.
3Productivity
If multiple preparation kettles and reaction kettles are used for continuous production, then productivity is improved, but device complexity increases
Solution Approach 1:
Each kettle in the system is designed as a multi-functional unit equipped with heating capabilities, stirring mechanisms, and refrigeration jackets. The metal salt preparation kettle, precipitant preparation kettle, and reaction kettle all share the same basic functional components, allowing them to perform multiple operations. This universality reduces the need for specialized equipment for each function, simplifying the overall device architecture while enabling continuous production through coordinated operation of the multiple kettles.
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 device enables continuous industrial production of catalysts with high specific surface area and catalytic activity, improving refrigeration efficiency and allowing for rapid dissolution and stirring, thereby enhancing the production process and maintaining consistent low-temperature conditions for effective catalyst synthesis.
Implementation Method 1
the circulating refrigeration system to refrigerate the primary reaction kettle and the secondary reaction kettle
Implementation Method 2
to control the metal salt preparation kettle in a heating and stirring state after adding a quantitative metal salt to the metal salt preparation kettle
Implementation Method 3
a device and a method for continuously producing catalysts based on low-temperature coprecipitation
Data Source
AI summary
The present disclosure discloses a device and a method for continuously producing catalysts based on low-temperature coprecipitation. The device mainly includes: a metal salt preparation kettle, a primary reaction kettle, a secondary reaction kettle, a precipitant preparation kettle, a circulating refrigeration system, an automatic control system, a non-aqueous solvent storage tank and a water storage tank. Independent preparation kettles are provided for rapid dissolution of the raw materials, and can be used to prepare the raw materials for the next batch during the reactions that are carried out in the primary and secondary reaction kettles; the circulating refrigeration system refrigerates the primary and secondary reaction kettles, and thus during the reaction, the low-temperature precipitant makes it possible to offset the precipitation reaction heat and the heat caused by the stirring in the primary reaction kettle, and improve the refrigeration efficiency of the primary reaction kettle.