Dissertation > Excellent graduate degree dissertation topics show

Synthesis, Characterization and Catalytic Properties of Metalloporphyrins Catalysts Immobilized on Montmorillonite

Author: ZhangXuan
Tutor: JiHongBing
School: South China University of Technology
Course: Applied Chemistry
Keywords: Metalloporphyrins Montmorillonite Immobilization Catalytic Oxidation Reuse
CLC: O643.32
Type: Master's thesis
Year: 2010
Downloads: 121
Quote: 0
Read: Download Dissertation

Abstract


Preparing an epoxide of the olefin epoxidation in the Organic Chemical Industry, thioether selective oxidation of sulfoxide or sulfone, alcohol oxidase prepared aldehyde or ketone, etc. reactions are very important in the oxidation process. Metal porphyrin complexes as effective simulation of cytochrome P-450 enzyme Biomimetic Catalysts select various substrates in the catalytic oxidation reaction showed higher catalytic activity and selectivity. However metal porphyrin catalysts having the stability is poor, it is difficult from the system recovery and re-use and other shortcomings. Select the appropriate method to the Metalloporphyrins load to organic or inorganic carrier, is one of the key Metalloporphyrins multiphase study of homogeneous catalysts. In this thesis, starting from meso-tetra (4-N-methyl-pyridyl) porphyrin synthesis of a series of ionic metal porphyrin got a load on the structure of MMT Immobilized metal porphyrin catalysts by impregnation method. Determined by the immobilized metal porphyrin catalyst synthesis, characterization, structure and morphology of the catalyst. And studied the reaction of the immobilized metal porphyrin catalyst under mild conditions catalyzed olefin, oxygen, sulfur, etc. Preparation of the compound oxidized by oxygen ring oxide, an aldehyde or ketone, sulfoxide, etc. Fine organic intermediates made possible reaction mechanism. Metalloporphyrins / Montmorillonite catalyzed olefin epoxidation, cyclohexene oxidation as a model reaction, carried out a systematic study on the reaction conditions. Meso-tetra (4-N-methyl-pyridyl) manganese porphyrin / the montmorillonite (MnTM4PyP/MT), as catalyst, acetonitrile as solvent, the amount of catalyst was 0.02g, 2.5 hours after the yield of the epoxide. to 91%. The catalyst can be reused after three cyclohexene conversion was still 80% or more, shows good reusability. The catalyst system can also be achieved other cyclic olefins, straight chain olefins, aromatic olefin epoxidation, shows good catalytic activity and selectivity. System of metal porphyrin catalytic alcohol oxygen oxidation of carbonyl compounds, oxidation of benzyl alcohol as a model reaction, carried out a systematic study on the reaction conditions. The optimum conditions were: cobalt porphyrin / montmorillonite as catalyst aids used in an amount of three times that of the substrate, the reaction temperature was 70oC, acetonitrile as solvent. The reaction under this condition for about 2 hours, so that many aromatic alcohols, straight-chain alcohols to the corresponding carbonyl compound is generated. In this system, the catalyst shows good stability, the catalyst can be reused 5 times, its activity has not decreased significantly. Finally, the selective oxidation of of Metalloporphyrins / montmorillonite catalysts sulfide system. Oxide as a model reaction to thioanisoles optimum conditions: MnTM4PyP/MT, as a catalyst and toluene as solvent, and oxygen as the oxidant, the reaction temperature was 80oC 45min after reaction, thioanisoles can completely be converted, sulfoxide the yield up to 86%. The catalyst can be reused, its activity was not significantly decreased reused after three. Also has good catalytic effect of the catalytic system under mild conditions, other types of sulfide oxidation.

Related Dissertations

  1. Analysis of Spread Spectrum Signals Based on FRFT,TN911.6
  2. Research of Processor Performance Optimization Based on Function Dynamic Reuse,TP332
  3. Penicillium Expansum TS414 Lipase in Pichia Pastori: Expression, Purification and Enantioselective Esterification of (R, S)-naproxen,Q814
  4. Study on the Recycling of Post-Consumer Polyester Textiles,X791
  5. The Study of NO Low-temperature Catalytic Oxidation Over MnFeO_x Catalyst,X701
  6. The Research on Immobilization of β-galactosidase and Production Technology of Low Lactose Milk,TS252.4
  7. Effects of Low Molecular Organic Acids on Immobilazition of Lead Ions by Nanosized Hydroxyapatite,S153
  8. Based on object-oriented technology simulation of plant root base class library,TP391.41
  9. Adsorption Effects of Phosphate and Chromium from Aqueous Solution by Adsorption Using LDH and Mg/Fe/Al Modified Montmorillonites,X703
  10. Study on Synthesis of Polysaccharide Tris (Phenylcarbamates) Derivatives as Chiral Stationary Phases (CSPs) and Estimation of Their Resolution Abilities,TQ460.1
  11. Extraction of the Lipase from Pseudomonas Cepacia S31 and Its Applications in Food,TS201.25
  12. The Research on the Microwave Stability of Selenium-Enriched Rich Bram,TS210.9
  13. Transfer and Transformation of Cu in Black Soil-Crop System and In-sit Immobilization Mechanism,X53
  14. Study on Electrochemistry and Raman Spectrum of Picoline Electro-Oxidation Beavior in Non-aqueous System,O626.321
  15. Preparation and Performance Study of the Full-degradable Polythene Films,TQ320.721
  16. Research and Development of Reusable Components of Management Information System in C/S Model,TP311.52
  17. Immobilization test strain qy37 processing the high salt nitrogenous wastewater research,X703
  18. Design and Implementation of Detention Center Information Management System Based on Component,TP311.52
  19. Research on the Current Situation, Methods and Improvement of Adaptive Reuse of the Old Industrial Buildings in Wuhan,TU984.114
  20. Research on the Space Matching in Adaptive Reuse of Industial Historic Building,TU984.114
  21. Garage management system line method of generation and reuse,TP315

CLC: > Mathematical sciences and chemical > Chemistry > Physical Chemistry ( theoretical chemistry ),chemical physics > Chemical kinetics,catalysis > Catalytic > Catalytic reaction
© 2012 www.DissertationTopic.Net  Mobile