LabKit™-rcf Heat Flow Reaction Calorimeter
LabKit™-rcf is a reaction calorimeter with sophisticated equipment for heat flow calorimetry. The automatic laboratory process plant is suitable, among other things, for syntheses in the temperature range from -40 to +200 °C. The system is expandable with the additional modules and components which are offered.
System construction
A double-walled 2 litre reaction vessel is used as the standard vessel.
Other vessels are possible.
The reaction vessel is temperature-controlled using a powerful heating/cooling thermostat, enabling fast temperature control for an isothermic mode of operation.
The reaction calorimeter may be extended for thermal balance calorimetry and may be expanded using options such as:
- Inerting
- Vacuum
- Distilling
- Reflux
When distilling with reflux separators, the reflux separation ratio may be adjusted via an electrically controllable reflux separator.
Measurement method
The heat flow method is based on the measurement of the temperature difference between the reactor contents and medium in the vessel jacket.
The heat transition coefficient cannot be theoretically calculated. Since it can vary significantly during the course of a reaction (e.g. as a result of a change in the viscosity, the specific heat of the reaction mixture or due to boundary layer formation), it is determined by calibration with a defined heat output before and after the reaction.
| Frame | Square anodised aluminium profile, electrical lowering equipment for the reactor vessel, stainless steel drip tank |
|---|---|
| Reactor | 2-litre double-walled glass vessel, temperature control jacket , PTFE bottom drain valve, cover with centre neck and 6 connecting pieces, relief valve 200 mbar, air escape valve |
| Stirrer | ViscoPakt®-rheo-57 precision stirrer drive with speed control and torque measurement, anchor stirrer |
| Heating/cooling system | Heating/cooling thermostat, -40…+200 °C, air/compressor cooling, heating power 1.5 kW, cooling power up to 0.48 kW (200 °C) |
| Dosing station | One GraviDos® dose loop for liquids (controlled dropping funnel), 500 ml receiver tank, gravimetrically controlled |
| Automation | LabManager® 3 interfaces 8 Pt100 precision temperature measurement inputs, 8 analogue inputs (current and voltage), 4 RS232 interfaces, 4 GraviDos® connections, 4 digital inputs, 8 digital outputs, controllable calibration heating device 50 W glass lance (optionally stainless steel) HiTec Zang OS, TFT monitor, uninterrupted power supply with UPS management software |
| Sensors | Calibrated temperature sensors for: reactor, thermostat, influx, reflux, head temperature and the environment, pressure sensor: 0…1.600 mbar absolute, stirrer: speed, torque |
| Materials | Mainly borosilicate glass, PTFE, PVDF, Viton, stainless steel material 1.4571 (changes are possible) |
| Analysis | KalDas™ calorimetry analysis software |
| Product code | Description |
|---|---|
| VL-LABKITRCF1 | LabKit™-rcf, reaction calorimeter for heat flow calorimetry |
| VL-LABKITRCONLF | HiText™ program for simple online heat flow analysis |
| SF-PID8 | Controller module with 8 PID and application oriented controllers |
| SA-KALDAS3 | Analysis program for heat flow and thermal balance calorimetry on LabKit™-rcb |
| SL-DIAPROT | HiText™ module dialogue and report forms with charts and tables |
| SI-LABVIPCALO | LabVision® software package for VL-LABKITRCF1 and VL-LABKITRCB1 |