STUDIES IN THE SYSTEM CALCIUM-OXIDE–SULPHUR-DIOXIDE–WATER: IV. VAPOR PRESSURE STUDIES IN THE PRESENCE OF CELLULOSE AND WOOD

1936 ◽  
Vol 14b (8) ◽  
pp. 301-309
Author(s):  
P. E. Gishler ◽  
O. Maass
Keyword(s):  
Carbon Dioxide ◽  
Vapor Pressure ◽  
Calcium Oxide ◽  
Sulphur Dioxide ◽  
Relative Rate ◽  
New Technique ◽  
Wood Cellulose ◽  
A New Technique ◽  
Pressure Changes ◽  
Rate Of Consumption

A new technique has been developed for the purpose of studying, by means of vapor pressure changes, the effect of wood and cellulose on the system calcium-oxide–sulphur-dioxide–water. Preliminary experiments are described. A sample calculation has been made, to indicate that vapor pressure changes might be used to determine the relative rate of consumption of sulphur dioxide and calcium oxide during the cooking of wood. Cellulose does not yield carbon dioxide in appreciable quantities during cooking.

STUDIES IN THE SYSTEM CALCIUM-OXIDE–SULPHUR-DIOXIDE–WATER: II. CALCULATION OF IONIC CONCENTRATIONS

1935 ◽  
Vol 13b (5) ◽  
pp. 308-322
Author(s):  
P. E. Gishler ◽  
O. Maass
Keyword(s):  
Vapor Pressure ◽  
Calcium Oxide ◽  
Sulphur Dioxide ◽  
Conductivity Data ◽  
Pressure Data ◽  
Vapor Pressure Data ◽  
Ionic Concentrations ◽  
Methods Of Calculation ◽  
Temperature And Pressure ◽  
Good Agreement

The conductivity and vapor pressure data of the system calcium-oxide–sulphur-dioxide–water presented in an earlier paper have been used to calculate ionic concentrations existing in this system, in the temperature and pressure range investigated. Two methods of calculation have been employed, one depending on the combination of vapor pressure and conductivity data, and the other, on conductivity data. For both, recourse was had to the data of Campbell and Maass on the system sulphur-dioxide–water. These methods gave results that are in good agreement with each other. The existence of a complex CaSO3.Ca(HSO3)2 was deduced.Hydrogen ion concentrations over the concentration and temperature range investigated have been calculated and extrapolations made to higher temperatures. These are presented in tabular form. Apart from the theoretical interest, it is pointed out that these results are of value in connection with studies of the delignification of wood by calcium-oxide–sulphur-dioxide–water solutions.

A new technique for vapor pressure measurement applied to the Fe−Si−Mg system

1971 ◽  
Vol 2 (12) ◽  
pp. 3305-3313 ◽  
Author(s):  
P. J. Guichelaar ◽  
P. K. Trojan ◽  
T. McCluhan ◽  
R. A. Flinn
Keyword(s):  
Vapor Pressure ◽  
Pressure Measurement ◽  
New Technique ◽  
Vapor Pressure Measurement ◽  
A New Technique

The partial molal volumes of gases in water at 0°C

1959 ◽  
Vol 12 (1) ◽  
pp. 40 ◽  
Author(s):  
I Lauder
Keyword(s):  
Carbon Dioxide ◽  
New Technique ◽  
Saturated Water ◽  
Partial Molal Volumes ◽  
Molal Volumes ◽  
A New Technique ◽  
Density Of Water

The partial molal volumes of nitrogen, oxygen, and carbon dioxide in water at 0 �C have been determined by a new technique based on the use of a Gilfillan-Polanyi micro-pyknometer as a float. The value obtained for nitrogen is 37.0 ml and that for oxygen, 31 ml. The value for carbon dioxide is found to vary from 44 to 28 ml as the pressure at which the water is saturated with the carbon dioxide varies from 0 to 6 cm Hg. The changes in the density of water at 0 �C produced by saturation with nitrogen, oxygen, and air at 1 atm pressure are -9.3, + 1.8, and -4.7 p.p.m. respectively. The density of air-saturated water is considerably greater than would be expected from the sum of the effects due to nitrogen and oxygen separately.

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