Tech Team · Kintek Solution

The largest rotary evaporator (rotovap) available typically has an evaporating flask capacity of 50 litres. This size is designed for large-scale operations, such as industrial or pilot-scale production, where significant volumes of solvents need to be recovered. The size of a rotovap is determined by the volume of solvent recovery required, and the 50L model is the largest standard size commonly used. During operation, the flask is typically loaded at 20–40% of its maximum capacity, ensuring efficient and safe operation. The 50L rotovap includes all standard features such as vacuum pump, temperature control, and a motorized lift mechanism, making it suitable for high-capacity solvent recovery tasks.

---

Key Points Explained:

1. Largest Standard Rotovap Size:

   • The largest standard rotovap has an evaporating flask capacity of 50 litres. This size is designed for industrial or large-scale applications where significant solvent recovery is required.
   • The 50L rotovap is ideal for pilot tests, production-scale operations, or extraction of precious materials in bulk.

2. Determining Rotovap Size:

   • The size of a rotovap is determined by the volume of solvent recovery needed. Common sizes include 5L, 10L, 20L, and 50L, with the latter being the largest standard size.
   • During operation, the evaporating flask is typically loaded at 20–40% of its maximum capacity to ensure efficient and safe operation.

3. Key Features of Large Rotovaps:

   • Vacuum System: Reduces pressure to facilitate solvent evaporation at lower temperatures.
   • Temperature Control: Includes a heated fluid bath to regulate the temperature of the solvent.
   • Motorized Lift Mechanism: Allows for easy adjustment of the flask height.
   • Condenser and Cold Finger: Ensures efficient condensation of the evaporated solvent.
   • Bump Guard: Prevents splashing or bumping of the solvent into the condenser.
   • Vacuum Release Valve: Allows for quick pressure adjustments.

4. Applications of Large Rotovaps:

   • Large rotovaps are used in industrial settings, pilot-scale production, and high-capacity solvent recovery tasks.
   • They are particularly useful in industries such as pharmaceuticals, chemical manufacturing, and essential oil extraction, where large volumes of solvents need to be processed.

5. Operational Considerations:

   • Large rotovaps require robust infrastructure, including a stable vacuum pump and efficient cooling systems.
   • The vertical orientation of the rotovap saves bench space and is common in industrial setups.
   • Safety features, such as bump guards and vacuum release valves, are critical for handling large volumes of solvents.

6. Comparison with Smaller Rotovaps:

   • Smaller rotovaps (e.g., 5L, 10L) are more suitable for laboratory-scale operations or smaller solvent recovery tasks.
   • Larger rotovaps (e.g., 50L) are designed for high-throughput applications and require more advanced controls and safety features.

7. Efficiency and Performance:

   • Large rotovaps operate at rotational speeds of up to 280 rpm and vacuum conditions of < 1 mm Hg, ensuring efficient solvent recovery.
   • The time-lapse control feature allows for precise monitoring and adjustment of the distillation process.

By understanding these key points, purchasers can make informed decisions about the appropriate rotovap size and features for their specific needs, whether for small-scale laboratory use or large-scale industrial applications.

Summary Table:

Feature	Details
Max Capacity	50 litres
Loading Capacity	20–40% of max capacity for safe operation
Key Features	Vacuum system, temperature control, motorized lift, condenser, bump guard
Applications	Industrial, pilot-scale production, high-capacity solvent recovery
Operational Speed	Up to 280 rpm
Vacuum Conditions	< 1 mm Hg
Safety Features	Bump guard, vacuum release valve

Need a high-capacity rotovap for your industrial or pilot-scale operations? Contact us today to learn more about the 50L rotary evaporator!