Cracking, potassium permanganate

In a typical process, potassium permanganate is used to treat the cracked liquor exiting the depolymerization plant without any pH adjustment. The liquor is usually acidic because it contains some of the phosphoric acid depolymerization catalyst. The KM11O4 treatment is followed by treatment of the CL aqueous solution with carbon followed by filtration. Next the filtered 20-30% CL aqueous solution is concentrated to 70% and the pH is adjusted to 9-10 by addition of sodium hydroxide. The caprolactam alkaline concentrate is treated widi KMn04 followed by distillation under reduced pressure to remove water and low-boiling impurities. 

Cocaine production Coca paste is dissolved in sulfuric acid to hydrolyze the alkaloids and produce ecognine. This is treated with 10% boron trichloride to produce ecognine methyl ester. Potassium permanganate is also added until the solution turns and remains pink. This removes cinnamoylcocaine isomers, which may be present in the mixture. The mixture is filtered, and the addition of base to the filtrate precipitates cocaine free base known as crack cocaine. The free base is dissolved in ether and precipitated as the hydrochloride salt through the addition of hydrochloric acid and is called snow cocaine. 

A more detailed analysis( ) shows that the special conditions which lead to this equation are (1) a branching coefficient independent of a (which is reasonable if this simply represents the number of individual nuclei in each microcluster, but surely less plausible in terms of a model in which branching is due to strain or cracking) (2) a termination coefficient which is equal to the branching coefficient times a/a (this should result in the same rate constant for acceleratory and decay periods, whereas they usually differ and sometimes even have different temperature coefficients) and (3) a symmetrical decomposition curve with a,- = 0.5 (potassium permanganate is the best example of this). Equation (34) presupposes the existence of some initial decomposition (nucleus formation) during the induction period integration between limits (ao, to) and (a, t) yields the Prout-Tompkins equation( )... 

Potassium Permanganate 1 15-35 3 Not resistant the agent attacks the polymer and/or causes stress cracking irreversible damage II... 

Potassium Permanganate 1 23 0-360 2 Not resistant rapid attack stress cracking irreversible damage ... 

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