Dissertation > Excellent graduate degree dissertation topics show

Study on Synthesis of Methylal by Catalytic Distillation

Author: ZhangSuFei
Tutor: ZhangXueMei
School: Tianjin University
Course: Chemical Engineering
Keywords: Catalytic distillation Methylal Methanol Process simulation reactive distillation
CLC: TQ224.4
Type: Master's thesis
Year: 2009
Downloads: 327
Quote: 0
Read: Download Dissertation

Abstract


Catalytic distillation can be considered as reaction and distillation combined into one new unit operation. It is a new chemical technology with the benefits of simplicity, energy-saving, low investment and operating cost etc. It is studied by researchers all over the world. Production of methylal by acetalization with methanol and formaldehyde in a catalytic distillation column was researched by experimental and simulation studies in this paper. The results can provide theoretical guidance for industrial methylal production.On the basis of the research on the synthesis of methylal with catalytic distillation and reviews of the structures of column, models and simulation methods, the reactive section and catalytic distillation column was designed with self-made catalytic bundles. The acetalization of methanol with formaldehyde carried out in the catalytic distillation column was researched experimentally. The effects of operation conditions such as reflux ratio, feed strategy, molar ratio of methanol to formaldehyde and total feed rate on formaldehyde conversion were obtained in experiments. The results show that it is feasible to conduct the acetalization of methanol with formaldehyde using the catalytic distillation method and the optimal process conditions are as follows: reflux ratio 5, feed strategy counter-current mode, molar ratio of methanol to formaldehyde 2.5:1 and the total feed rate is 8.088 g / min.The vapor-liquid equilibria data in literature was used to regress the parameters of binary interaction of activity coefficient equations of Wilson, NRTL and UNIQUAN with ProⅡ. And then the parameters of binary interaction were used to calculate the vapor-liquid equilibria data. Comparison between data in literature and calculation data, results show that NRTL is the best one of the three equations.Process simulation results were compared with experimental ones. The error is less than 7%, so the simulation results are credible. In order to provide more theoretical guidance, the effects of operation conditions such as formaldehyde mass concentration, relative holdup, tray number of reactive section, tray number of rectifying section, tray number of stripping section and catalyst weight on formaldehyde conversion were simulated. The optimal process conditions are as follows: formaldehyde mass concentration 037, relative holdup 0.0625, tray number of reactive section 13, tray number of rectifying section 5, tray number of stripping section 2 and catalyst weight 80 g .The commercial unit of 5000 t /a methylal synthesis by catalytic distillation was simulated according to the results of above; the results were used to calculate the column diameter, packing height and area of condenser and reboiler.

Related Dissertations

  1. Study on the Preparation of Biodiesel from Fried Oil with Supercritical Methanol,TE667
  2. Multi-walled Carbon Nanotubes Au _AT_ of Pt, Au _AT_ of Pd core-shell structure of the catalyst preparation and electrochemical properties of,O643.36
  3. Pt -based catalysts of direct methanol fuel cells,TM911.4
  4. Nano Pt / SiC Preparation, Characterization and Electrochemical Catalytic Performance,TM911.4
  5. Synthesis of Platinum-based Composite Catalysts and Their Electrocatalytic Properties for Methanol Oxidation,TM911.4
  6. Simulation and Emulation of Methanol Distillation Process in Large-scale Coal Chemical Industry,TQ223.121
  7. Simulation and Analysis of Methanol Production in Coal Chemical Industry,TQ223.121
  8. RFID-based cold chain logistics center process simulation and optimization,F253.9
  9. The Drawing Process Robust Planning and the Die Surface Compensation of the Automotive Wheel Cover by Numerical Simulation,TG386
  10. The waste oil supercritical prepared biodiesel,TE667
  11. Fluid catalytic distillation properties of components,TE621
  12. Study on the Preparation of the catalytic distillation packing solid base catalyst,TQ203.2
  13. Research on Engineering Analog Caculation and Modification of the Demethanizer in Ethylene Plant,TQ221.211
  14. Proton exchange membrane fuel cell materials, design and development,TM911.4
  15. Study on the Anode Catalyst of the Direct Methanol Fuel Cells,TM911.4
  16. Safety Assessment of a New Ethoxylation Catalytic Distillation Process,TQ203.2
  17. Dynamic Model and Simulation of Catalytic Distillation for the Synthesis of Ethylene Glycol Monobutyl Ether,TQ223.24
  18. Study on Solid Acid Catalyst and Process of Synthesis N-Butyl Lactate,TQ225.241
  19. Construction Process and Parameters Study on Pedestrian’s Overpass with Beam String Structure,U441
  20. Hydrate Formation and Injection of Alcohol Antifreeze Law Technologu,P744.4
  21. Preparation and Properties of Proton Exchange Membranes Based on Functional Poly-norbornene,TM911.4

CLC: > Industrial Technology > Chemical Industry > Basic Organic Chemistry Industry > The production of aliphatic compounds ( acyclic compounds) > Aliphatic aldehydes and ketones ( carbonyl compounds ) and its derivatives > Functional derivatives of aldehydes and ketones
© 2012 www.DissertationTopic.Net  Mobile