A Jacketed Reaction Vessel also called a jacketed reactor or double-walled reactor is a specialized piece of laboratory or industrial equipment designed for chemical reactions that require precise temperature control. It consists of an inner vessel where the reactants are held and mixed, surrounded by an outer jacket through which a heat transfer fluid (such as water, oil, or a coolant) circulates to heat or cool the reaction. This setup allows for efficient thermal regulation, preventing heat loss or gain from the environment and enabling reactions to occur under controlled conditions, often ranging from -120°C to 250°C depending on the model.
Jacketed Mixing Vessel Video
Key Components and How It Works
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Inner Vessel: Typically made of borosilicate glass for chemical resistance and visibility. It holds the reactants and supports stirring or mixing.
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Outer Jacket: Circulates the temperature-regulating fluid. Single-jacketed vessels are common for basic heating/cooling, while double-jacketed versions provide better insulation for extreme temperatures, reducing energy use and keeping the vessel ice-free at low temps.
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Accessories: Often includes a variable-speed stirrer (PTFE-coated), temperature probe with digital display, feeding funnel, condenser, and bottom discharge valve for sampling or product removal. The system can operate under vacuum or pressure for batch or continuous processes.
The vessel works by transferring heat through the jacket walls to the inner reaction space. For example, hot fluid in the jacket raises the temperature for exothermic reactions, while cold fluid cools for endothermic ones. This indirect method ensures safety and uniformity.
Common Materials and Sizes
Jacketed vessels are usually constructed from borosilicate glass for lab use due to its thermal shock resistance and transparency, though stainless steel versions exist for larger industrial scales. Sizes range from small benchtop models (e.g., 100 mL to 5 L) for R&D to pilot-scale (up to 50 L or 200 L) for process development.
Applications
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Chemical Synthesis: Stirring reactions under inert atmospheres or vacuum.
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Pharmaceuticals: Scale-up from flasks to production batches with precise temp/pressure control.
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Material Science: Polymerization or crystallization processes.
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Pilot Plants: Testing continuous flow reactions before full-scale manufacturing.
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