What kind of vacuum grease is needed for vacuum distillation

For vacuum distillation, a specific type of vacuum grease that can withstand high temperatures and maintain its properties in a vacuum environment should be used. Commonly recommended types include: 1. **Silicone Grease**: This is often used due to its stability and versatility. It can handle a range of temperatures and has good insulating properties. 2. **PTFE (Teflon) Grease**: Provides excellent chemical resistance and can withstand both high and low temperatures. It's particularly useful for applications that involve aggressive solvents. 3. **Vacuum Grease with High Temperature Stability**: Look for greases specifically formulated for vacuum applications that mention high temperature stability and low outgassing properties. Brands like Dow Corning and Apiezon offer specialized vacuum greases that are suitable for laboratory use. When selecting vacuum grease, ensure it is rated for the specific temperature range you will encounter during distillation and that it has low volatility to prevent contamination of the distilled product. Always consult the manufacturer's specifications for compatibility with the materials in your system.