Dissertation > Excellent graduate degree dissertation topics show

The Synthesis and Purification of Methyl Glycolate

Author: HanXiang
Tutor: ZhuZhiQing
School: East China University of Science and Technology
Course: Chemical processes
Keywords: Au catalyst Methyl glycolate Synthesis Purification
CLC: TQ225.24
Type: Master's thesis
Year: 2012
Downloads: 26
Quote: 0
Read: Download Dissertation

Abstract


The synthesis of methyl glycolate from one-step oxidative esterification of ethylene glycol with methanol and the preparation of highly active Au/Al2O3 catalyst were studied in this paper. With the research, the optimum reaction conditions were determined, and also the purification scheme was obtained.The catalyst supports and preparation methods for gold catalyst were discussed in the screening stage. The experimental results exhibited that Au/Al2O3 catalyst prepared by deposition-precipitation method, using NaOH as the precipitating agent, Au weight loading between 0.5% and 1.0%, calcined under 300～400℃for 2h, showed the most favorable performance. Then, based on the former researches, the reaction conditions were optimized according to the thermodynamic analysis and reaction mechanism. Over 97% conversion of ethylene glycol and 60% selectivity of methyl glycolate could be achieved under the optimum conditions as follow:120℃,0.45 MPa and O2:N2=1:2 (volume).With the analysis of the reaction compound, the main by-products were determined as dimethyl oxalate and methyl oxalate. Through the physical-chemical properties of every compound, the separation method was processed as follows:the dimethyl oxalate can be distilled out as azeotrope by the adding of H2O; the methyl oxalate can be removed as precipitation by the using of precipitator B, at last, the purity of methyl glycolate could reach up to 88% by vacuum distillation.

Related Dissertations

  1. Studies on the Synthesis and Technology of Dipentaerythritol and Its Derivative,TQ223.164
  2. Synthesis and Characterization on Semi-Aromatic Polyamides Containing Benzoxazole Units,O633.5
  3. Hydrothermal Synthesis of Oxide Hollow Spheres,TB383.4
  4. Study on Protective Effects of Apple Polyphenol on Immune System Injury Caused by γ-Ray,S661.1
  5. Video Coding Research Based on Texture Characteristics,TP391.41
  6. Poetic alienation : graphics,J506
  7. Study on Wastewater Purification Effect of the Free Surface Wetland with Different Substrates and Plant Combination,X703
  8. Penicillium Expansum TS414 Lipase in Pichia Pastori: Expression, Purification and Enantioselective Esterification of (R, S)-naproxen,Q814
  9. Urothermal Synthesis, Structure and Characterization of Functional Coordination Polymers,O631.3
  10. Studies on Fermentation Optimization, Purification and Enzyme Characteristics of Lipase from Aspergillus Oryzae FS-1,TQ925.6
  11. Studies on Isolation, Purification and Chemical Structure for Polysaccharides from Camellia Chrysantha(Hu) Tuyama,S567.19
  12. The Total Synthesis of a Flavonoid Glycoside Apigenin-7-O-β-D-glucuronide,R284.1
  13. Research of Glycosaminoglycan from Perna Virids Effect on Blood Lipid,R285.5
  14. Atovaquone analogues Design, Synthesis and antitumor activity of,R914
  15. Purification of Endogenous Proteases from (Litopenaeus Vannamei) Shrimp Head and Their Enzymology Properties,S985.21
  16. Study on the Preparation of the Low Molecular Weight Fuciodan from Sargassum Henslowianum (C.Agardh) and Anti-tumor Activity,TS254.9
  17. Synthesis and Seperation of 1,1’-binaphthol,O625.3
  18. Under microaerobic conditions closed calcium carbide furnace exhaust COS gas adsorption purification,X781
  19. Studies on Extraction and Analysis of Fructooligosaccharides in Smallanthus Sonchifolius,TS255.1
  20. Flexible,rigid,Synthesis and characterization of mixed ligand complexes,O621.1
  21. Synthesis and Performance Study of Bisphenol AP-based Polybenzoxazines,TQ320.1

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