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Lab report continuous distillation column uitm

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  • 1. 1 | P a g e TABLE CONTENT Number Title Page 1. Abstract/Summary 2. Introduction 3. Aims 4. Theory 5. Apparatus 6. Methodology/Procedure 7. Results 8. Calculations 9. Discussion 10. Conclusion 11. Recommendations 12. Reference 13. Appendix
  • 2. 2 | P a g e 4.0 OBJECTIVES The objectives of the experiment A and B is:- 1. To determine the pressure drop over the distillation column for various boil-up rates in batch distillation. 2. To determine mixture compositions by using refractrometer. 3. To observe the degree of forming on trays for each power increment 4. To plot the curve relating pressure drop and boil-up rate 5. To determine the refractive index for unknown concentration of methylcyclohexane/toluene from the distillation column for each power increment.
  • 3. 3 | P a g e 5.0 APPARATUS This apparatus and material in this experiment is:- 1. The Continuous Distillation Column Model UOP3CC 2. 100 ml Measuring cylinder 3. Automatic digital Refractometer 4. Stop watch 5. Distilled water 6. Methylcyclohexane 7. Toluene 8. Dropper Figure 5.1:- The figure shown that the Continuous Distillation Column Model UOP3CC
  • 4. 4 | P a g e Figure 5.2:- The figure shown that the flow diagram of Continuous Distillation Column Model UOP3CC Figure 5.3:- The figure shown that the automatic digital Refractometer
  • 5. 5 | P a g e Figure 6.4:- The figure shown that the 100ml measuring cylinder
  • 6. 6 | P a g e 6.0 EXPERIMENT PROCEDURE Experiment A: Determining column pressure drop 1. All of the valve on the equipment must be closed. Valve V10 on the reflux pipe is opened 2. Make sure all the valves on the equipment are closed and open valve V10 on the reflux pipe. 3. Then, replace the filler cap on the top of the reboiler. Turn on the the power to the control panel. Set the temperature selector switch to T9, the temperature in the reboiler and open valve V5 admitting the cooling water to the condenser at a flow rate on F11 of approximately 3 litres/min. 4. Turn the power on the controller panel for the reboiler heating element fully anti- clockwise and switch turning is switched on the power to the heating element to “power on” position. Then, illuminate another red lamp indicating the heating element is on. Then, the power controller is turned until a reading of approximately 0.75kW is obtained on the digital wattmeter. Warm up the contents of the reboiler and observe the temperature readout meter. 5. Open valves V6 and V7 which connect base and top of the distillation column, respectively, to the manometer. 6. The boil up rate can be measured by operating valve V3 so that all the condensate is diverted into a measuring cylinder and the time observed to collect a set quantity. Partially open valve V3 and drain the condensate when taking a sample from the reflux system until a steady flow is obtained. Make sure that the liquid remains in the flexible connecting tube to prevent vapour from escaping. 7. Start sample collection and timing at the same time. A sizeable amount is collected approximately 90mL in 100mL measuring cylinder. Pour the first nonrepresentative collected amount in a bottle labelled “recyclable MHC/toluene”. 8. Take the readings of pressure drops over both the rectifying (top) and the stripping (bottom) sections by opening the valves V6 and V7 on the manometer. 9. Make sure always to open valve V6 then V7 to prevent vapour from the column entering the manometer. These readings are repeated until two in a row agree fairly closely. Allow
  • 7. 7 | P a g e 5 to 10 minutes between each set of measurements before starting the next set in order for the system to reach equilibrium again. 10. Repeat the experiment by increasing the power to 0.75kw, 1.00kW and 1.25kW. Before collect the sample and take the time taken, allow the distillation to run for 5 to 10 minutes. 11. Graph of pressure drop versus boil-u rate is plot base on the result. EXPERIMENT B – DETERMINING THE MIXTURE COMPOSITOINS 1. Set up the equipment.. The refractive index (R.I) of pure methylcyclohexane, MCH and pure toluene. 2. Take the small quantities of methylcyclohexane, MCH approximately 25 mol percent, 50 mol percent and 75 mol percent and the refractive index is measured. 3. The volume of constituent to use using the formula. For 25 mol percent methylcyclohexane; 75 mol percent toluene Molecular weight methylcyclohexane= 98.19 Molecular weight toluene= 92.15 Density methlcyclohexane=0.774 g/mL Density toluene=0.867 g/mL
  • 8. 8 | P a g e     MCHTOL MCH TOL TOL MCH MCH TOL MCH TOL MCH TOL TOL MCH MCH TOL MCH TOL TOL MCH MCH TOL TOL TOLTOL MCH MCHMCH MCH VolVol Vol Vol MW MW Vol Vol MW MW Vol Vol Vol MW Vol MW Vol MW MW MW Vol 51.21 867.0 774.0 19.98 15.92 3 3 )()( 25 3                   1 100 25 thus Thus for 100 mL of mixture, quantities required will be 28.49 mL methylcyclohexane 71.51 mL toluene
  • 9. 9 | P a g e 12.0 REFERENCES 1. Transport Processes and Separation Process, Christie John Geankoplis, Fourth Edition, page 700-702. 2. Laboratory manual, Chemical Engineering Laboratory II, (CPE 524), faculty Of Chemical Engineering, Uitm. 3. Unit Operation of Chemical Engineering, McGrawhill 7th edition, Warren L Mccabe, 4. Julian C.Smith, Peter Harriot. 5. http://www.scribd.com/doc/12276923/Distillation-New-and-Old-Technology 13.0 APPENDICES Figure 13.1:- The figure shown that the Continuous Distillation Column Model UOP3CC
  • 10. 10 | P a g e Figure 13.2:- The figure shown that the automatic digital Refractometer Figure 13.3 - Distillation Collumn Figure 13.4 - Collecting distillate Figure 13.5 - Pressure drop indicator
  • 11. 11 | P a g e

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