In 500 liters of reaction kettle add camphor 50 grams, sodium methanol 43.2Kg and 80Kg ethanol, ice water cooling through 34Kg ethyl nitrite, aeration is completed to continue the reaction for 2 hours, add 100Kg of water, liquid separation, the lower layer of the solution with 10% hydrochloric acid and neutralization to the PH value of 1-2, extracted with 100Kg of dichloromethane two times, combined with the dichloromethane, dechlorination of dichloromethane, recrystallization with ethanol to get a light yellow solid camphor oxime 50kg, yield 84%. Ethanol recrystallization to get light yellow solid camphor oxime 50kg, yield 84%.
