Examination of American–Made Acetylsalicylic Acid

Paul Nicholas. Leech
1918 Journal of Industrial & Engineering Chemistry  
reproducible and evidently logarithmic in form have been obtained. 111-A high degree of impregnation of water with carbon dioxide gas has been obtained using a. rotary stirrer while maintaining the liquid under a steady pressure of gas. IV-The effect of an increase in speed of stirring is t o tremendously shorten the time of carbonation, and a t the same time increase the degree of impregnation. V-In an efficiently carbonated water the gas content, after the first opening of the bottle, closely
more » ... the bottle, closely approximates Henry's law. VI-The degree of impregnation of a liquid with a gas is not directly indicated by the "initial pressure," that is, the pressure of the gas over the free surface of the liquid before the first opening of the bottle. VII-The length of time that the carbonated water is allowed t o stand before opening bears a marked relation t o the maintenance of the supersaturated condition after the pressure in the gas cushion is released. This effect is evidently due t o the gradual solution of fine gas bubbles retained on the inner surface of t h e container. VIII-By "blowing off)' of the foreign gases in the gas cushion, a higher degree of carbonation can be secured. This principle has been used by the practical men in the trade. IX-A high degree of carbonation may be obtained using distilled water alone, as a solvent, and if this product is allowed t o stand for a period before opening, the carbon dioxide gas is retained remarkably well.
doi:10.1021/ie50100a017 fatcat:rf4qiyx4knbgzcnfnyccenwvzy