MR-CE 620 Liquid –Liquid Extraction Unit Vocational Training Equipment Didactic Equipment Fluid Mechanics Experiment Equipment
Apparatus The apparatus consists of a liquid-liquid extraction glass column mounted on the side of the distillation column. This last column can be used to recover the solvent for extraction or to be used separately for the distillation process. This unit can develop and analyze the following topics: Extract • Determine the number of transfer units • Height of the transfer unit • Extraction efficiency • Mass balance • Calculation of mass transfer coefficient • Calculate the number of theoretical stages • Concentration trends along the column • Practice on a system with 3 partially mixable components: Distillation • Recover the solvent used in the extraction • Distillation of different mixtures (water/ethanol, water/methanol, methanol/propanol, etc.) with changes in the following operating parameters: - reflux ratio - feed flow rate - reboiler heating power - feed composition •flood Required technical characteristics: • Stainless steel frame with casters • 5 stainless steel tanks with a capacity of 20 litres • Borosilicate glass extraction column, including 26 grades, h = 1500 mm, including stainless steel disc agitator, 2 borosilicate glass separators and variable speed motors (0 to 1000 rpm) • 2 stainless steel metering pumps with flow rate 0-40 L / h • Borosilicate glass distillation column with vacuum jacket • Reflux head of borosilicate glass • Solenoid valve for controlling the return ratio • Stainless steel reboiler for distillation column with a capacity of 7 litres • Electric heater of stainless steel, P = 3000 W • Thyristor unit for controlling the electric heater • 2 timers for controlling the reflux ratio • Overhead condenser of borosilicate glass with exchange surface of 0.3 m2 • Flowmeter for the water feeding the head condenser, with range of 20 to 250 L/h • 3 thermoresistances Pt 100 with sheath of stainless steel • 3 board-type electronic digital temperature indicators • Tube-in-tube heat exchanger of stainless steel : for cooling of column outlet product and for cooling of distillate • Tank of borosilicate glass, with capacity of 3 L, for collecting the column outlet product • Graduated tank of borosilicate glass, with capacity of 1 for the collection fo distillate • Piping and valves of and stainless steel • Switchboard, complying with EC conformity mark, including plant synoptic and ELCB • Emergency button Complete with: Silenced air compressor • 220-240 V / 50 Hz • Air displacement: 50 L/min. • Safety valve • Pressure gauge • Motor with thermal overload protection • Operating pressure: max. 10 bar controlled by a pressure switch • Noise level: 40 dB /1 m • Size of the air tank: 24 lt. • Power: 0,5 HP Refractometer • Measurement range of refractive index ND 1.300 - 1.700 • Measurement accuracy ND 士 0.0002 • Mass fraction (BRIX) • Temperature range: 0/70°C • Enlargement 2x
