Dissolve 9 g of sodium hydroxide with a small amount of ice and water, dissolve 15.6 g of hydroxylamine hydrochloride in 20 mL of warm water, combine both solutions. Now start adding slowly 20 mL of cyclohexanone, the solution must be magnetically stirred very rapidly for 30 min, filter. Wash the precipitate with cold water and recrystallize in hot ethanol.
Dissolving the hydroxylamine hydrochloride in warm water
Dissolving sodium hydroxide with ice
Adding cyclohexanone very slowly to the combined solution
Mixture has turned milky and after some time the cyclohexanone oxime starts to crystallize