Jacketed Glass Reactor
Jacketed glass reactor system with overhead stirring for controlled temperature chemical synthesis, available in capacities from 1L to 100L with integrated mechanical agitation.
Louise Corscadden, PhD
Neuroscience · ConductScience
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The Jacketed Glass Reactor is a benchtop chemical synthesis system designed for controlled temperature reactions in laboratory and pilot-scale applications. The reactor features a double-wall glass construction with a heated/cooled jacket surrounding the reaction vessel, enabling precise thermal control during chemical processes. Multiple capacity options from 1L to 100L accommodate various batch sizes and experimental requirements.
The integrated overhead stirring system provides mechanical agitation with power ratings from 60W to 180W, depending on reactor size. Variable torque motors deliver up to 4800 g/cm of mixing force through a 12mm diameter shaft, ensuring adequate mixing in viscous reaction media. The jacketed design allows for heating, cooling, or maintaining isothermal conditions using external circulators or heating/cooling baths connected to the jacket inlet and outlet ports.
How It Works
The jacketed glass reactor operates on the principle of indirect thermal control through a circulating heat transfer medium in the jacket space. The double-wall borosilicate glass construction creates an annular space between the inner reaction vessel and outer jacket wall. Heat transfer fluid (water, oil, or specialized coolants) circulates through this jacket space, providing uniform temperature distribution across the reaction vessel surface.
The overhead mechanical stirring system uses a variable-speed motor coupled to a stirring shaft that penetrates the reactor head through a sealed bearing assembly. The stirring impeller design creates controlled fluid flow patterns within the reaction vessel, ensuring homogeneous mixing of reactants and efficient heat transfer from the vessel walls to the reaction mixture. Temperature control is achieved by connecting the jacket ports to external heating/cooling circulators that maintain the heat transfer fluid at the desired setpoint.
The reactor head typically incorporates multiple ports for reagent addition, sampling, temperature monitoring, and gas inlet/outlet connections. This configuration enables batch, semi-batch, or continuous feeding operations while maintaining an inert atmosphere if required for air-sensitive reactions.
Features & Benefits
Automation Level
- semi-automated
JGR-2L
- JGR-3L
JGR-5L
- JGR-10L
JGR-20L
- JGR-30L
JGR-50L
- JGR-100L
Reaction Flask Capacity
- 1L
2L
- 3L
5L
- 10L
20L
- 30L
50L
- 100L
Stirring Power
- 60W
120W
- 180W
Stirring Shaft Diameter
- 12mm
Motor Torque(g/cm)
- 2000
2400
- 4800
Brand
- ConductScience
Research Domain
- Analytical Chemistry
- Environmental Monitoring
- Food Science
- Industrial Hygiene
- Materials Science
- Pharmaceutical QC
Weight
- 40.0 kg
Dimensions
- L: 42.0 mm
- W: 43.6 mm
- H: 38.0 mm
| Feature | This Product | Typical Alternative | Advantage |
|---|---|---|---|
| Capacity Range | 1L to 100L reaction vessels available | Entry-level models often limited to 1L-5L range | Enables seamless scale-up from method development to pilot production without changing equipment platforms |
| Stirring Power | 60W to 180W motor options with up to 4800 g/cm torque | Basic units typically offer lower torque ratings | Maintains consistent mixing performance in high-viscosity reactions and dense suspensions |
| Shaft Diameter | 12mm diameter stirring shaft | Smaller diameter shafts common in compact units | Provides robust mechanical coupling and reduced deflection during high-torque operations |
| Modular Design | Multiple capacity options with scalable stirring power | Fixed configurations with limited upgrade options | Allows researchers to select optimal capacity and power combination for specific experimental requirements |
This jacketed reactor system offers comprehensive capacity scaling from analytical to pilot scale with proportional stirring power ratings. The robust mechanical stirring system and modular design provide flexibility for diverse chemical synthesis applications across multiple research domains.
Practical Tips
Verify jacket temperature uniformity using multiple temperature probes placed at different vessel positions before critical reactions.
Why: Ensures accurate temperature control and identifies potential hot spots that could affect reaction outcomes.
Inspect stirring shaft seals weekly for any signs of leakage and replace immediately if compromised.
Why: Prevents contamination of reaction mixtures and maintains safe operation of the mechanical stirring system.
Always establish jacket circulation and reach temperature equilibrium before adding temperature-sensitive reagents.
Why: Prevents thermal shock to reactants and ensures consistent reaction initiation conditions.
Install appropriate pressure relief systems when working with reactions that may generate gas or increase internal pressure.
Why: Protects both personnel and equipment from overpressure conditions that could cause vessel failure.
If stirring becomes erratic, immediately check for impeller fouling or shaft misalignment before continuing operations.
Why: Prevents mechanical damage to the stirring system and ensures consistent mixing throughout the reaction period.
Record both jacket and internal reaction temperatures to validate heat transfer efficiency and reaction progress.
Why: Provides comprehensive thermal history data for reaction optimization and reproducibility assessment.
Setup Guide
What’s in the Box
- Jacketed glass reaction vessel (typical)
- Overhead stirring motor assembly (typical)
- Stirring shaft and impeller (typical)
- Reactor head with multiple ports (typical)
- Support frame and clamps (typical)
- Jacket connection fittings (typical)
- Temperature probe adapter (typical)
- User manual and safety information (typical)
Warranty
ConductScience provides a standard one-year manufacturer warranty covering defects in materials and workmanship. Technical support includes installation guidance, operational troubleshooting, and replacement part identification for optimal system performance.
Compliance
What temperature range can be achieved with the jacket circulation system?
Temperature range depends on the external heating/cooling circulator connected to the jacket ports. Consult product datasheet for recommended circulator specifications and maximum operating temperatures for the borosilicate glass construction.
How do I select the appropriate stirring speed for my reaction?
Start with low speeds (50-100 RPM) and gradually increase while monitoring mixing efficiency and vortex formation. Higher viscosity reactions may require increased torque settings available in larger capacity models.
Can the reactor handle pressure above atmospheric conditions?
The standard reactor head design accommodates slight positive pressure for inert gas blanketing. For higher pressure operations, consult product datasheet for pressure rating specifications and available pressure-rated accessories.
What maintenance is required for the mechanical stirring system?
Regular inspection of shaft seals, bearing lubrication according to manufacturer schedule, and periodic alignment checks ensure reliable operation. Replace seals immediately if any leakage is observed.
How do I prevent thermal shock damage to the glass vessel?
Limit temperature change rates to manufacturer specifications, typically 10-15°C per minute maximum. Ensure jacket circulation is established before heating and avoid direct flame contact with glass surfaces.
What impeller designs are compatible with the 12mm stirring shaft?
Standard configurations include pitched blade, anchor, and helical impellers depending on reaction viscosity and mixing requirements. Consult product datasheet for impeller selection guidelines based on your specific application.
Can I retrofit temperature controllers to existing reactor systems?
Yes, external heating/cooling circulators with PID temperature control can be connected to any jacketed reactor through the inlet/outlet ports. Match circulator capacity to reactor jacket volume for optimal performance.
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