Saturated hydrocaibons

Low-Smoke Low-Odor Inks, Low-smsolvent-based heat-set inks currently used. These inks contain lower concentrations of solvents (e. g., 20% instead of 40%), with a smaller proportion of saturated hydrocaibon solvents and none of tiie photochemlcally-reactive solvents, yet have printing and ink-film properties typical of beat-set inks. Some of these inks contain exempt solvents (e. g., low-boiling azeotropic mixtures), some contain high-boiling co-solvents (e.g., long-chain alcohols), others contain emulsfiad water. 

P2O5 for 48 hours then fractionally distilling. Alternatively, it has been refluxed for 24 hours with saturated acid KMn04 (to oxidise and remove hydrocaibons), then neutralised, steam distilled, dried with P2O5, and passed slowly through a column of dry silica gel. It has been purified by fractional ciystaUisation using partial freezing. [Beilstein 1IV 388.]... 

Minisci and Fontana [14] have recently offeree an alternative e. planation in which an Fe species (of undefined origin) reacts with TBHP in the Fenton manner to generate a t.-buto.xide radical, which then reacts with the hydrocaibon to make a carbon radical, which then reacts with the anion attached to Fe and so makes the derivative and reforms Fe. Certain of the recorded facts do not agree with this interpretation [15] and further work is needed. However whichever interpretation of the facts is correct, we do have a very efficient method for turning saturated hydrocarbons into their monochloro derivatives. 

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