Description
The introduces students to the fundamentals of crystallisation using a solution-cooling method. It is a benchtop unit with a clear crystallisation reactor, which enables visualisation of the crystallisation phenomena. The equipment consists of a jacketed crystallisation vessel provided with temperature control and agitation. The solution is heated by circulating hot water through the jacket from the hot water vessel in a closed-loop system and the solution is cooled by circulating cold water from mains water supply or a chiller. At the end of the batch operation, the crystals and mother liquor are collected using the beaker supplied, filtered, washed and then dried in the oven. The dried crystals are then sieved using the set of sieves supplied to analyse the crystal size distribution.
Demonstration Capabilities
- Understanding the principles of crystallisation
- Understanding crystallisation driving force
- Mass and energy balance
- Batch operation
- Continuous operation (option)
- Evaluation of crystallisation efficiency and crystallisation kinetics
- Study of the effect of different parameters such as agitation rate and cooling rate
- Crystal size distribution
Specification
- Crystallisation unit
- Benchtop metal frame unit
- Clear crystalliser vessel
- Hot-water vessel with PID control loop
- Three temperature sensors
- Conductivity probe
- Non-corrosive baffle and impeller blades
- USB port for data logging using the Armfield software
- Set of sieves for determining crystal-size distribution
- Comprehensive instruction manual with detailed laboratory teaching exercises.
- Isolating switch on the console
- Plastic bung with silicone sleeve
- Low liquid level sensor on the hot water vessel
- Hot and cold water pumps
- 3l beaker for collecting crystals and mother liquor
Technical Data
- 2l jacketed crystallisation vessel
- Hot water pump
- Flow meter 0.05-3 l/min
- Three temperature sensors
- Conductivity probe 0-600mS
- Low level liquid sensor
- Cold water supply pressure regulator
- Heater capacity 2kW
- Pressure regulator 0-2 bar
