Double Jacketed Chemical Glass Reactor Borosilicate 3.3 High Temperature Lab Reaction Vessel 50L

The double jacketed glass reactor represents a leap forward in chemical synthesis technology, engineered to deliver unparalleled thermal control and reaction uniformity across a wide range of laboratory and pilot-scale applications. Constructed from premium 3.3 high borosilicate glass, this reactor system offers exceptional resistance to thermal shock, chemical corrosion, and mechanical stress. The double-layer jacket design enables precise temperature regulation by circulating heating or cooling media through the interlayer, making it suitable for exothermic and endothermic reactions alike. Whether you are conducting organic synthesis, polymerization, crystallization, or distillation, this reactor ensures stable and reproducible results under demanding conditions.

At the core of this reactor is the double-jacket configuration, which maximizes heat transfer surface area while minimizing thermal gradients within the reaction vessel. The inner vessel is seamlessly fabricated from a single piece of borosilicate glass, eliminating the risk of leakage at seams or joints. The outer jacket is robustly welded and pressure-tested to withstand continuous circulation of thermal fluids at temperatures ranging from -80°C to 250°C. This broad operating range empowers chemists to perform low-temperature reactions with chilled glycol or high-temperature syntheses with silicone oil, all within the same versatile platform.

Stirring is achieved through a PTFE-coated mechanical seal assembly that maintains high vacuum integrity while delivering consistent agitation. The stirring motor employs a frequency-controlled brushless design, offering variable speeds from 50 to 600 rpm with exceptional torque stability. The PTFE stirring paddle is custom-shaped to promote axial and radial flow, ensuring homogeneous mixing even with viscous media or solid suspensions. The mechanical seal is rated for continuous operation under vacuum down to -0.098 MPa, making the system ideal for vacuum distillation and solvent recovery processes.

Safety and operational convenience are integral to the design. The reactor lid features multiple ground-glass necks that accommodate a range of accessories including a reflux condenser, addition funnel, temperature probe, and pH sensor. Each neck is precision-ground to standard taper dimensions, ensuring leak-free connections with common laboratory glassware. The bottom discharge valve is fabricated from PTFE and glass, providing dead-space-free drainage that prevents cross-contamination between batches. The entire assembly is supported by a heavy-duty stainless steel frame with lockable casters for mobility and stability during operation.

• Double-Jacket Thermal Control: The dual-layer design circulates heating or cooling media through the interlayer, providing rapid temperature response and uniform heat distribution across the entire reaction volume for precise process control.
• Premium Borosilicate Glass Construction: Fabricated from 3.3 high borosilicate glass with a low coefficient of thermal expansion, offering outstanding resistance to thermal shock up to 200°C differential and excellent chemical durability against acids, bases, and organic solvents.
• High-Vacuum Mechanical Seal: PTFE-encapsulated mechanical stirring seal maintains vacuum integrity down to -0.098 MPa during continuous agitation, enabling vacuum distillation, degassing, and moisture-sensitive reactions without performance degradation.
• Frequency-Controlled Stirring System: Brushless DC motor with digital speed control delivers 50–600 rpm across the full torque range, featuring overload protection, soft-start functionality, and spark-free operation for use with flammable solvents.
• Modular Accessory Compatibility: Multiple ground-glass necks accept standard laboratory components including condensers, addition funnels, thermowells, and sampling ports, allowing the reactor to be configured for reflux, distillation, or continuous feed applications.
• Industrial-Grade Support Frame: SUS304 stainless steel framework with corrosion-resistant coating and lockable swivel casters ensures stability during high-torque mixing and facilitates safe repositioning within the laboratory or pilot plant.

This double jacketed glass reactor is extensively deployed across pharmaceutical research laboratories for API synthesis and process development, where precise temperature control is critical to reaction selectivity and yield optimization. In fine chemical manufacturing, it serves as a reliable platform for multi-step synthesis sequences including esterification, nitration, and Friedel-Crafts acylation. Academic and industrial R&D centers utilize this reactor for catalyst screening, polymerization studies, and crystallization process optimization. The system is equally suited to natural product extraction, essential oil distillation, and solvent recycling operations in the food, fragrance, and cosmetics industries. Its robust construction and modular design make it the preferred choice for contract research organizations that require flexible, multi-purpose reaction platforms capable of handling diverse chemistry workflows.

Each glass reactor system undergoes rigorous quality inspection including vacuum leak testing, glass stress polarimetry, and dimensional verification before shipment. Glass components are individually wrapped in anti-static PE foam, placed in reinforced multi-layer corrugated cartons with partitioned inserts to prevent glass-to-glass contact. The stainless steel frame and motor assembly are secured in a fumigated plywood case lined with moisture-barrier film. Every shipment includes a comprehensive quality certificate, material test reports for borosilicate glass compliance, and a detailed installation and operation manual. We provide a 12-month warranty covering manufacturing defects, with extended service contracts available upon request. Our technical support team offers remote video assistance for installation and commissioning, as well as on-site training for pilot-scale systems.