200 



In the experiments recorded in the following table the amyl alcohol used had been 

 dried and fractionated at boiling points between 128 and 132 C. After the oxidation 

 50 cc of sulphuric acid (1:4) was added and then an excess of hydrogen peroxid, and 

 the mixture was boiled under a reflux condenser for fifteen minutes to remove any 

 carbon dioxid. The mixture was then distilled until bumping occurred due to the 

 separation of salts from the solution; 80 cc of water were added and distillation repeated 

 to the same point. The valeric acids were then titrated with tenth-normal sodium 

 hydroxid with the following results: 



Amyl alcohol estimated under varying conditions, using alkaline potassium permanganate. 



Hours. 



At a temperature of 0C. the oxidation of amyl alcohol to valeric acid appears to be 

 quantitative and at higher temperatures the yield of valeric acid is decreased. 

 Variations in time within the above limits have little influence upon the reaction. 

 When the oxidation is too vigorous destruction occurs and the results are low. If the 

 reaction is controlled by decreasing the temperature the oxidation is arrested at the 

 production of the corresponding acids. The acids when produced are not easily 

 altered and may be allowed to stand with the oxidizing agent at room temperature 

 without appreciable change. 



THE OXIDATION OF NORMAL PROPYL AND ISOBUTYL ALCOHOLS. 



Similar experiments were made upon normal propyl and isobutyl alcohols, following 

 the same procedure as in the case of amyl alcohol, and with the following results. 



Estimation of propyl and isobutyl alcohols, using alkaline potassium permanga nnh . 



