scholarly journals Volumetric properties of vapor saturated aqueous potassium hydroxide solutions from 0/sup 0/ to 400/sup 0/ and vapor saturated aqueous sodium hydroxide solutions from 0/sup 0/ to 350/sup 0/ based on a regression of the available literature data

1977 ◽  
Author(s):  
D.L. Brown ◽  
R.W. II Potter
Keyword(s):  
Sodium Hydroxide ◽  
Potassium Hydroxide ◽  
Aqueous Sodium Hydroxide ◽  
Volumetric Properties ◽  
Aqueous Sodium ◽  
Aqueous Potassium Hydroxide ◽  
Saturated Aqueous Sodium

THE DIVERGENT BEHAVIOR OF THE HYDROXIDES OF LITHIUM, SODIUM, AND OF POTASSIUM, RUBIDIUM, AND CESIUM IN THE XANTHATION OF CELLULOSE AND STARCH

1957 ◽  
Vol 35 (9) ◽  
pp. 960-968 ◽  
Author(s):  
E. G. Adamek ◽  
C. B. Purves
Keyword(s):  
Sodium Hydroxide ◽  
Sulphuric Acid ◽  
Potassium Hydroxide ◽  
Carbon Disulphide ◽  
Cellulose Xanthate ◽  
Aqueous Sodium Hydroxide ◽  
Large Excess ◽  
Sodium Potassium ◽  
Aqueous Sodium ◽  
Divergent Behavior

When a suspension of cellulose, or a solution of starch, in 17.8% aqueous sodium hydroxide was shaken with a large excess of carbon disulphide, a sodium xanthate of degree of substitution (D.S.) about 0.4 was obtained. The replacement of the sodium hydroxide by 17.8% potassium hydroxide resulted in a product of D.S. about 1.3. Plots were made of the D.S. of cellulose xanthate resulting from the use of various concentrations of the hydroxides of lithium, sodium, potassium, rubidium, and cesium; the plots for the last three hydroxides were similar, and differed sharply in form from those of the first two.Potassium cellulose or starch xanthate of D.S. about unity was freely soluble in water as well as in aqueous alkalies and the solutions "ripened". When immersed in methyl iodide, the dry salts yielded the corresponding S-methyl xanthates without change in the D.S. These S-methyl xanthates were white substances insoluble in water but dissolved or dispersed by carbon disulphide. They could be acetylated with sulphuric acid as catalyst and without change in the S-methyl xanthate D.S. The acetylated cellulose derivative was freely dispersed by chloroform or trichloroethylene.

scholarly journals Triple Helix of Scleroglucan in Dilute Aqueous Sodium Hydroxide

1981 ◽  
Vol 13 (12) ◽  
pp. 1135-1143 ◽  
Author(s):  
Toshio Yanaki ◽  
Takemasa Kojima ◽  
Takashi Norisuye
Keyword(s):  
Sodium Hydroxide ◽  
Triple Helix ◽  
Aqueous Sodium Hydroxide ◽  
Aqueous Sodium
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