Dissertation > Excellent graduate degree dissertation topics show

Study on the Phase Equilibrium of the Quaternary System Sodium Sulfate + Sodium Chloride + Hydrogen Peroxide + Water and Thermal Decomposition Kinetics of the Adduct Formed Among the System

Author: ZhaoHongKun
Tutor: LiuGuoJi
School: Zhengzhou University
Course: Chemical processes
Keywords: 4Na2SO4 · 2H2O2 · NaCl Na2SO4 · 0.5H2O2 · H2O Sodium Sodium chloride Peroxide Phase diagram Phase equilibria Thermal decomposition Decomposition kinetics
CLC: O642
Type: PhD thesis
Year: 2003
Downloads: 314
Quote: 0
Read: Download Dissertation

Abstract


Sodium - hydrogen peroxide - sodium chloride adduct is a neutral, non-toxic cleaning aids, is a new type of fine chemical products. Formula: 2 SO 4Na 4 · 2H 2 O 2 · NaCl mass fraction of hydrogen peroxide 9.79%. 4Na 2 SO 4 · 2H 2 O 2 · NaCl aqueous neutral while sodium is one of the main ingredients of detergent, so as a new type of oxygen bleach washing auxiliaries, shows the huge superiority of applications than sodium percarbonate and sodium perborate wide. China has rich resources of sodium sulfate, developed sodium produced hydrogen peroxide adduct new technology, the use of cost-effective resources for sodium, the production of high value-added fine chemical products, has opened a new way to broaden the peroxide applications of hydrogen adduct; 4Na 2 SO 4 · 2H 2 O 2 · NaCl use waste discharge, adapted to the requirements of environmental protection. In today's environmental awareness is growing, industrial production and the promotion and application of the product has a significant economic and social benefits. Literature 4Na 2 SO 4 · 2H 2 O 2 · NaCl the synthesis and application of research, The 4Na 2 SO 4 · 2H 2 O 2 · NaCl prepared the theoretical basis is Na 2 SO 4 -H 2 O 2 -NaCl-H phase diagram 2 O four yuan system the literature its sub-system Na 2 SO 4 -NaCl-H 2 O and Na 2 SO 4 -H 2 O 2 -H 2 O study, but the phase equilibrium data of the quaternary system has not yet see reported in the literature. Determination of the ternary system Na 2 SO 4 -NaCl-H 2 O, Na 2 SO the-H 2 O 2 -H 2 O and NaCl-H 2 O < sub> 2 -H 2 O at 283,288 and 293 K solubility data and its saturated solution of density and refractive index, draw the corresponding phase diagram of the system. The Na 2 SO 4 -H based on 2 O 2 -NaCl-H the O four yuan systems were studied, measured and drawn at 283 K and 288 K and of Na 2 SO 4 -H 2 the the O 2 -NaCl-H 2 O four yuan system phase diagram balance density and refractive index of the liquid phase. The, Na 2 SO 4 -H 2 O 2 -NaCl-H 2 at a certain temperature O system, there are four solid-phase precipitation, when the hydrogen concentration in the oxide is less than 50wt%, phase diagram there are two three substances of saturation point, five two substances saturation line and four single substance crystallization region. four single substances crystalline regions correspond to the 4Na 2 SO 4 · 2H 2 O 2 · NaCl, Na 2 SO 4 · 0.5H 2 O 2 · H 2 O, NaCl in and Na 2 SO 4 · 10H 2 O. Study on the equilibrium of the quaternary system and its ternary sub-system, prepared for the Na 2 SO 4 4Na 2 SO 4 < / sub> · 2H 2 O 2 · NaCl synthesis conditions determine and product separation equilibrium theory basis, a new comprehensive utilization of resources for the sodium the idea has important practical value and academic significance. Na 2 SO 4 -H 2 O 2 -NaCl-H 2 O quaternary system is typical of the electrolyte - the non-electrolytic system, particularly the system contains less stable H 2 O 2 . Electrolyte containing H 2 O 2 - the calculation of the non-electrolytic system and the association has not been reported. Empirical relationship of the activity coefficient and the concentration of non-electrolyte system to Beutier and Renon use H 2 O 2 the saturated vapor pressure of the aqueous solution, regression on style in the two parameter values. On this basis, the application of the Pitzer model Na 2 SO 4 -H 2 O 2 -NaCl-H 2 O four yuan system and its ternary sub-system contains of of Na SO 4 -NaCl-H 2 O, N help 50; HZO: HZO and the NaCI an HZO: a HZO 288K under solubility data regression Pitzer parameters obtained by the interaction between the different particle at the same time get a 4Na2SO4'2H2O2'NaCl and N sentence 504.0 .5 H2o2 · HZo Zs8K solubility product, respectively 0.0565 and 5.452,10 a 3 phase equilibrium calculation results with experimental data is consistent. The use of the associated empirical formula of the equilibrium density and refractive index of the liquid phase, the empirical parameters. The quaternary system Pitze: regression parameters and phase equilibrium calculations, provides research and engineering design for 4NaZSO4 · ZH202.NaCI synthesis conditions of the underlying data. To infrared spectroscopy X ray diffraction NaZSO; HZO: the NaCI an H20 IV system, the composite product 4N 504.2 of H2O2 · NaCI and NaZSO4 · 0.5H2O2 · HZO characterized 4N at 504.2 H2O2 infrared spectroscopy the · NaCI and NaZSO4 0.5H2O2 H20 X-diffraction patterns and spectra are briefly analyzed. The prepared 4Na2SO4'2H2O2'NaCl infrared absorption peaks and x a diffraction pattern consistent with literature data. The spectrum of NaZSO4 · 0.5H2024H20 not been reported, prepared according to the corresponding temperature Na: 50, an H Blade 2 H knife ternary phase diagrams, and chemical analysis and thermal gravimetric analysis of the content of HZOZ close on the theoretical value, and the resulting spectrum is closer to the pure N 504,0.5 H2O2 · H20. Thermal analyzer using temperature-programmed method to study T 4N 504.2 H202 · NaCI and N hasty 504.0 .5 H2O2, HZO kinetics of thermal decomposition in nitrogen and air. Both atmosphere 4NaZSO4 the · 2H2O2 NaCI, the thermal decomposition of two phases, the first stage of decomposition of 7.76 to 8.90%; second stage of decomposition O 34 1.02% adsorption (physical adsorption) 4N at 504 · 2H2O2 · the NaCI decomposition product HZOZ molecular desorption, decomposition product thereof is Na, 50, (111) and NaCI. NaZSO4 · 0 5H202 · HZO the thermal decomposition is only through a process, namely the completion of the reaction step, the thermal decomposition is a simple reaction, the mass fraction of the decomposition mass fraction and the closer H knife 2 and H must decomposition products N Hill 50. (V). In the case does not involve the decomposition mechanism ozawa a Flynn Wan Law the Friedman Law, Kissinger law and based Hareount a Esson modeless function method obtained from different angles of 4N at 504.2 H2O2 · NaCI and NaZSO4 · 0.5H2O2 activation energy · HZO decomposition, and multiple nonlinear regression of their decomposition activation energy optimization. Nitrogen 4N help 504.2 H2O2 · NaCI and NaZSO4 · 0.5H2O2 · HZO decomposition activation energy were 1 74.84KJ · mol, and 70.53 heart · mol ', the air in the activation energies for 152.56 phantom · mol 'and 79.27 KJ · mol a'. Gas atmosphere and the gas flow rate has little effect on its decomposition mechanism, the results of the multivariate nonlinear regression and the master curve method, 4Na2SO4.2H2O2 'NaCl decomposition level n available autocatalytic mechanism described decomposed into NaZS04 · 0.5H2O2 · HZO dimensional phase boundary R3 mechanism. 4N Assistant 504.2 H2O2 · NaCI and NaZSO4 · 0.5H2O2 · HZO decomposition temperature in a nitrogen atmosphere to 463.38K and 341.28K (Document?

Related Dissertations

  1. Imidazolium ionic liquids Thermal Analysis,O626.23
  2. The Dehydration and Dehydration Kinetics of Cobalt (Ⅱ)-hexamethylenetetramine and Nickel (Ⅱ)-hexamethylenetetramine Compounds,O643.12
  3. Study of Carbon Black Grafted with Hyperbranched Poly(Amine-ester)s and Thermal Degradation Kinetics,O631.3
  4. Weak microwave absorbing materials calcined new technology and theoretical research,TB34
  5. Synthesis and Characterization of ZnO Nano Materials and Superstructures,TB383
  6. Synthesis of Phosphates via Solid-State Reaction and Study on Their Properties,TB383.1
  7. Solvothermal - prepared by thermal decomposition of cobalt tetroxide and its capacitance performance,TM53
  8. Different microstructure of nickel oxide preparation and chemical sensing and photocatalytic properties,TB383.1
  9. Synthesis and Characterization of Magnetite Nanostructures,TB383.1
  10. Thermal Decomposition Kinetics of Captrril Intercalated Mg-Al Layered Double Hydroxides and Interactions between Bovine Serum Albumin and Mg-Al Layered Double Oxides,R962
  11. Nano- CdS crystal controlled synthesis and photocatalytic properties of,O614.242
  12. Decomposition Kinetics of Glucose Catalyzed by Metal Chlorides in High Temperature Liquid Water,O643.12
  13. Study on the Decomposition Kinetics of Pyrethriod Insecticides,S482.3
  14. Basic Studies of Multi-Structure and Properties on Bio-Degradable Poly(3-Hydroxybutyrate-CO-3-Hydroxyhexanate),O631.11
  15. Effect of Particle Size on the Thermal Decomposition Kinetics of Nanoparticles,TB383.1
  16. Study on the Green Synthesis of 1,6-Hexamethylene Diisocyanate,TQ225.24
  17. Synthesis of Gold Magnetic Particles and Their Application,TB383.1
  18. The azole of benzene twenty-four Energetic Compounds synthesis , structure and thermal decomposition of ammonium perchlorate catalysis,O626.28
  19. Study on Property of Eu~3+ Doped ATO Non-materials and Electrocatalysis Ability of Eu~3+ Doped Ti/SnO_ 2-Sb Electrodes,TB383.1
  20. Preparation of Magnetite Nanoparticles and Their Properties,TB383.1

CLC: > Mathematical sciences and chemical > Chemistry > Physical Chemistry ( theoretical chemistry ),chemical physics > Chemical thermodynamics, thermochemistry, thermodynamic equilibrium
© 2012 www.DissertationTopic.Net  Mobile