Dissertation > Excellent graduate degree dissertation topics show

Preparation of SO42-/ZrO2-MO3 （M=Mo, W） Solid Acid and Catalytic Synthesis of n-Butyl Acetate

Author: GaoLuYang
Tutor: LiRuMin
School: Harbin Engineering University
Course: Applied Chemistry
Keywords: Solid acid Catalyst Esterification reaction
CLC: TQ225.24
Type: Master's thesis
Year: 2008
Downloads: 141
Quote: 0
Read: Download Dissertation

Abstract


Acid-catalyzed esterification reaction interesting industrial mainly concentrated sulfuric acid as a catalyst, but the liquid acid catalyst is susceptible to corrosion of equipment, product separation difficulties, serious environmental pollution and other shortcomings, therefore, the development of environmentally friendly solid strong acid catalyst is of great significance . SO 4 2 - / ZrO 2 solid acid catalyst due to its strong acidic keen interest in people, is considered to be the most promising solid acid catalyst. But the SO 4 2 - / ZrO 2 drawback is fast inactivation, poor stability. Added in the reaction system new oxide can guarantee the the SO 4 2 - / ZrO 2 characteristics, but also overcome its own shortcomings . Of this thesis is to use the above principle prepared by impregnation the SO 4 2 - / ZrO 2 -MoO 3 and SO 4 2 - / ZrO 2 -MoO 3 -WO 3 solid acid catalyst. Characterization of the structure and activity of the catalyst by means of XRD, FT-IR, DTA, SEM and TEM. Of MoO 3 , add the amount and calcination temperature factors the WO 3 ZrO 2 crystallization temperature and crystalline phase transition temperature that : of MoO 3 introduction of ZrO 2 by ZrO 2 (t) to ZrO with 2 (m) conversion a temperature of WO 3 to produce a synergistic role with MoO 3 , and more effectively suppressed of ZrO 2 high temperature sintering, so that ZrO 2 maintained within a wider temperature range ZrO 2 (t). SEM results show that of MoO 3 the columnar form diffusion in ZrO 2 matrix, play the role of pinning high temperature sintering process, hinder the diffusion and mass as well as the conduct of crystal The movement of the sector, thereby suppressing the the ZrO 2 crystal growth. Fixed factors experimental rotation method to explore the mechanism of the homemade solid acid catalytic synthesis of butyl acetate reaction, to explore the catalytic reaction conditions, to determine the optimum conditions: Use SZMW-0.03-650 solid acid, dosage of 0.3g, 6.0g of glacial acetic acid in the amounts of reactants, 8.88g n-butanol, and the reaction time of 1.5h the reaction conditions, the esterification rate of up to 84.8%. Under the same reaction conditions, the catalyst, as compared with some other acidic catalyst, having a high yield, easy to recover, reusability good advantage, use 5 times the yield of product is still up to 70.3%.

Related Dissertations

  1. Synthesis and Characterization of Monovalent, Divalent Imidazolium Ionic Liquids Containing Hydrocarbons,O621.3
  2. Pt -based catalysts of direct methanol fuel cells,TM911.4
  3. Controllable Synthesis of Carbon Nanotubes Supported Metall Nanocatalysts and the Study on Their Electrocatalysis,O643.36
  4. PtRh / Pt 5 / C Catalyst Preparation, Characterization and Electrocatalytic Oxidation of Ethanol,TM911.4
  5. Synthesis and Performance of Itaconic Acid Series Polycarboxylate Superplasticizer,TU528.042.2
  6. Preparation and Characterization of Silica-, Alumina-Based Catalysts for Methanol Dehydration,TQ426
  7. Zeolite -based bifunctional catalysts and their catalytic isomerization Performance,O643.36
  8. The Preparation and Properties of Modified TiO2 Thin Films,TB383.2
  9. Synthesis and Catalytic Properties of Core-shell Magnetic Nanocomposites,TB383.1
  10. Study on Potassium Catalyst Recovery of Coal-Steam Catalytic Gasification,TQ546
  11. Study on Process of Ethylene Epoxidation on Silver Catalysts,O643.32
  12. Research of Ni-Based Catalysts for Hydrogen Generation from NaBH4 Hydrolysis,O643.36
  13. The Dehydration of 2, 3-Butanediol into Methyl Ethyl Ketone,TQ224.22
  14. Bimetallic Catalyst of Co and Ni for Fischer-Tropsch Synthesis Supported on Alumina,O643.36
  15. Study on Synthesis of Propylene Carbonate from Urea and 1,2-Propylene Glycol,TQ225.52
  16. Light Hydrocarbon Synthesis from Syngas on Fe-based Catalyst,TQ426.94
  17. Research on Catalytic System for Carbonylation of Butadiene to Methyl 3-Pentenoate,TQ225.146
  18. Preparation and Properties of Platinum-based Catalysts for Potential Use in PEMFCs,TM911.4
  19. Properties of Zirconia Nanotube Arrays Loading Phospotungtic Acid,O614.412
  20. The Performance Study of ZrO2 Nanotubes Supported SO42-,O614.412
  21. Preparation of Carbon-Based Solid Acid for Syntesis of P-Aminophenol,TQ243.12

CLC: > Industrial Technology > Chemical Industry > Basic Organic Chemistry Industry > The production of aliphatic compounds ( acyclic compounds) > Aliphatic carboxylic acid and its derivatives > Carboxylic acid derivatives of the function > Ester
© 2012 www.DissertationTopic.Net  Mobile