scholarly journals Solubility of water in vinyl chloride

1981 ◽  
Vol 59 (5) ◽  
pp. 768-771 ◽  
Author(s):  
E. Colin Clarke ◽  
David N. Glew ◽  
Denis J. Maisonneuve
Keyword(s):  
Water Absorption ◽  
Vinyl Chloride ◽  
Thermodynamic Function ◽  
Water Transfer ◽  
Standard Thermodynamic Function ◽  
Absorption Method ◽  
Temperature Range

The solubility of water in liquid vinyl chloride has been measured over the temperature range −17° to 60 °C by a classical water absorption method. Solubility equations for water in vinyl chloride have been derived and the standard thermodynamic function changes for water transfer have been evaluated.

scholarly journals Potentiometric Sensors for Iodide and Bromide Based on Pt(II)-Porphyrin

Sensors ◽  
2018 ◽  
Vol 18 (7) ◽  
pp. 2297 ◽  
Author(s):  
Dana Vlascici ◽  
Nicoleta Plesu ◽  
Gheorghe Fagadar-Cosma ◽  
Anca Lascu ◽  
Mihaela Petric ◽  
...  
Keyword(s):  
Diffusion Coefficient ◽  
Water Absorption ◽  
Vinyl Chloride ◽  
Potentiometric Sensors ◽  
Iodide Ions ◽  
Response Characteristics ◽  
Potentiometric Response ◽  
Poly Vinyl Chloride

Pt(II) 5,10,15,20-tetra(4-methoxy-phenyl)-porphyrin (PtTMeOPP) was used in the construction of new ion-selective sensors. The potentiometric response characteristics (slope and selectivity) of iodide and bromide-selective electrodes based on (PtTMeOPP) metalloporphyrin in o-nitrophenyloctylether (NPOE), dioctylphtalate (DOP) and dioctylsebacate (DOS) plasticized poly(vinyl chloride) membranes are compared. The best results were obtained for the membranes plasticized with DOP and NPOE. The sensors have linear responses with near-Nernstian slopes toward bromide and iodide ions and good selectivity. The membrane plasticized with NPOE was electrochemically characterized using the EIS method to determine its water absorption and the diffusion coefficient into the membrane.

scholarly journals Formation of porous ceramics using cullet and biological waste of water purification

2011 ◽  
Vol 43 (1) ◽  
pp. 81-94 ◽  
Author(s):  
M. Vlasova ◽  
I. Rosales ◽  
M. Kakazey ◽  
Parra Parra ◽  
R. Guardian
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Water Purification ◽  
Sintering Temperature ◽  
Porous Ceramics ◽  
Absorption Capacity ◽  
Water Absorption Capacity ◽  
Red Clay ◽  
Temperature Range

Porous ceramics (bricks) was obtained using red clay, milled fusible cullet, and biowaste in the temperature range 950-1000?C. The high content of water in biowaste eliminates the necessity of introducing water in soft mud forming of bricks. The porosity, water absorption capacity, and mechanical properties of the prepared ceramics depend on content of milled cullet and sintering temperature.

Aqueous Nonelectrolyte Solutions. Part VIII. Deuterium and Hydrogen Sulfides Solubilities in Deuterium Oxide and Water

1971 ◽  
Vol 49 (5) ◽  
pp. 691-698 ◽  
Author(s):  
E. C. W. Clarke ◽  
D. N. Glew
Keyword(s):  
Hydrogen Sulfide ◽  
Thermodynamic Function ◽  
Deuterium Oxide ◽  
Standard Errors ◽  
Standard Thermodynamic Function ◽  
New Apparatus ◽  
Nonelectrolyte Solutions

A new apparatus is described in which the solubility of deuterium sulfide in deuterium oxide and of hydrogen sulfide in water have been determined with 0.1 % accuracy between 0 and 50 °C. Solubility equations are derived and the solubility standard thermodynamic function changes, together with their standard errors, are tabluated. Equal solubilities would occur at −1 °C. The solubility of hydrogen sulfide in water is greater than for deuterium sulfide in deuterium oxide, the solubility difference increases to a maximum at 40 °C and thence decreases at higher temperatures.

Effect of hydrogen, and vapors of water and organic compounds on the structure of Sr2CuO3

2021 ◽  
Vol 112 (7) ◽  
pp. 578-583
Author(s):  
Igor B. Bobylev ◽  
Sergey V. Naumov ◽  
Natalia A. Zyuzeva
Keyword(s):  
Water Absorption ◽  
Organic Compounds ◽  
Annealing Atmosphere ◽  
Oxidation Reactions ◽  
Temperature Range ◽  
Hydrolytic Decomposition ◽  
Strontium Hydroxide

Abstract The effect of hydrogen, and vapors of water and the simplest organic compounds of various classes on the structure of strontium orthocuprate (Sr2CuO3) in the temperature range of 150–300 °C has been investigated. At temperatures up to 200 °C, hydrogen and water are embedded in the structure of Sr2CuO3 from the annealing atmosphere. Under these conditions, organic compounds are oxidized to form water followed by hydration of Sr2CuO3. It has been revealed that Sr2CuO3 is a catalyst for oxidation reactions. Water absorption > 2 wt.% provokes hydrolytic decomposition of Sr2CuO3 with the formation of strontium hydroxide and copper-richer cuprates (SrCuO2 and SrCu2O3). At a temperature of 300 °C, organic compounds partially reduce copper, which is also the cause of the decomposition of Sr2CuO3.

Waste poly (vinyl chloride) pyrolysis with hydrogen chloride abatement by steelmaking dust

2016 ◽  
Vol 70 (7) ◽  
Author(s):  
Jakub Korpas ◽  
Václav Slovák ◽  
Kamil Wichterle
Keyword(s):  
Experimental Study ◽  
Zinc Oxide ◽  
Hydrogen Chloride ◽  
Vinyl Chloride ◽  
Material Balance ◽  
Pyrolysis Process ◽  
Temperature Range ◽  
Poly Vinyl Chloride ◽  
Steelmaking Dust

AbstractExperimental study on PVC-based materials (PVC = poly (vinyl chloride)) pyrolysis; in the presence of various amounts of steelmaking dust was performed. Dust from steel manufacture employing zinc plated scrap contains a considerable amount of zinc oxide (ZnO) and its utilization in metallurgy is quite complicated. However, the dust can react with hydrogen chloride (HCl) released from heated PVC in the temperature range of 200–400°C. Material balance of the pyrolysis process was studied by thermogravimetry, and the data obtained were compared with the results of larger laboratory oven experiments. In excess of PVC, the amount of captured HCl stoichiometrically corresponds to the content of ZnO; additional HCl is probably captured by FeCl

The thermodynamics of the ionization of 3-hydroxypyridine and pyridoxine in water–dioxane mixtures

1992 ◽  
Vol 70 (6) ◽  
pp. 1635-1639 ◽  
Author(s):  
Salvador B. Asensio ◽  
Enrique Lopez-Cantarero ◽  
Juan Llor
Keyword(s):  
Free Energy ◽  
Thermodynamic Function ◽  
Thermodynamic Equilibrium ◽  
Equilibrium Constants ◽  
Weight Fraction ◽  
Tautomeric Equilibrium ◽  
Potentiometric Method ◽  
Standard Thermodynamic Function ◽  
Net Zero ◽  
Ionization Processes

A potentiometric method has been used to determine the thermodynamic equilibrium constants for the macroscopic ionization processes of 3-hydroxypyridine and pyridoxine in water–dioxane mixtures (0–70% weight fraction in dioxane) at temperatures from 10 to 50 °C. From these data the reaction standard thermodynamic function changes were obtained for the processes in various water–dioxane mixtures at 25 °C. It was found, in both molecules, that during the first ionization process the contributions of entropy and enthalpy to free energy are similar but that during the second ionization the main contribution comes from entropy, especially in mixtures with a high dioxane content. The effect of the solvent on the tautomeric equilibrium in the net zero charge specie could explain this behaviour.

The photosensitized polymerization of vinyl chloride in tetrahydrofuran solution - I. Characteristics of the overall reaction

1954 ◽  
Vol 221 (1144) ◽  
pp. 28-36 ◽  
Keyword(s):  
Vinyl Chloride ◽  
Monomer Concentration ◽  
Initiator Concentration ◽  
Temperature Range ◽  
Rate Of Polymerization ◽  
Tetrahydrofuran Solution

The photosensitized polymerization of vinyl chloride in tetrahydrofuran has been studied over the temperature range 25 to 55°C, using either 2, 2´-azo- iso butyronitrile or 1, l´-azo-1- cyclo hexane nitrile as initiator. The rate of polymerization is constant over the first 10% reaction and decreases in the later stages. The rate is proportional to the three halves power of the monomer concentration and to a power of the initiator concentration which increases with increase in temperature. The value of the intensity exponent shows a similar rise. This has been attributed to a mixture of monomer and mutual termination, the proportion of the former increasing at higher temperatures.

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