203 



That it should ! nece<-ury to warm the solution to room temperature seems incon- 

 .-i.-tent \\ith the results obtained on propyl and i>obutyl alcohols where the acids 

 formed wen- distilled. The explanation probably lies in the fact that delay occurred 

 before the destruction of the permanganate with the hydrogen peroxid. Hence it 

 BOM a Decent?? condition in the ((iiantitative oxidation of mixture* containing 

 isobutyl ami anul alcohols by alkaline permanganate, that after the' oxidation of the 

 ainyl alcohol at the solution be allowed to warm to room temperature. 



That ainyl alcohol in carbon tetrachlorid solution should be quantitatively oxidized 

 by alkaline permanganate was quite probable, providing the alkaline permanganate 

 could reach the alcohol. Knowing that the oxidation of the amyl alcohol is quite 

 rapid, and de-inn- to.-horten the t ime of shaking as much as possible, it was thought 

 live minutes of continual shaking would be sutlicient. The following table indicates 

 the amount of amyl alcohol dissolved in 100 cc of carbon tetrachlorid and the amount 

 found: 



l>rtrrminntinn <>f nnii/l <tlmfil , n curium t< truchlorid solution . 



The extraction of amyl alcohol from alcoholic -olution \\as m-xt subjected to experi- 

 ment In the aiuilysi- of di-tilled liquors \\e are dealing \\ith " to '^ per cent by 

 volume alcohol solutions which are extracted \ N Jth tetrachlorid and the tetrachlorid 

 washed with saturated w>luti' .um chlorid and siwlium sulpliate to remove 



the eth\l alcohol. eMimatin- the higher alcohol- extracted under fixed conditions. 

 1 1 \\a- llmiiu'ht of importance t> learn how thoroughly the washing of the ethyl alcohol 

 from the tetrachlorid was accomplished by the cii-tomary method of wa.-hin^ three 

 time* with thn- rtiooi "t" -aturated -odium <-hlorid solution, and lastly with 



one .">o cc jMirtioii of .-aturaied -.dium sulphate solution. The extraction was made 

 from IIMI ( c of :. p.-r i-ent b> \olum.-aliohol. The temperature of the HoluUoot WM 

 In four experiment- the follouini: amounts (grams) of perman-anate \\crv 



coa-uined: 0.0080, 0.0114, 0.0090, 0.0065; average, O.OOs: Thkimdicated thereten- 



tion in the carb.m tetrachlorid of approximately 0.0033 gram of ethyl alcohol. 



-action of known amounts of amyl alcohol from eth\l alcoholic solution, 45 

 percent by volume, \\ere made \\ith the follouin- re-ult- 



knniin <ln><i,it.< / niiii/l nlrntinl Jrnin tfti/l nlrnfmf solution (23 C.). 



