Process for producing cyclohexanone-oxime
A technology of cyclohexanone oxime and production method, which is applied in oxime preparation, organic chemistry, etc., can solve the problems of complicated treatment and high hydroxylamine salt dosage, and achieve high selectivity, high conversion rate and post-treatment process of cyclohexanone oxime. simple effect
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Embodiment 1
[0025] The first step is according to weight ratio cyclohexanone: catalyst is 1: 0.03, cyclohexanone: solvent is 1: 5, cyclohexanone: the mol ratio of ammonia is 1: 1.15, and catalyst is Ti-MWW molecular sieve, and ammonia is liquid ammonia , the concentration is 25%, and the solvent is water;
[0026] The second step reaction temperature is 60 DEG C, and the mol ratio of cyclohexanone: hydrogen peroxide is 1: 1.06, and the concentration of hydrogen peroxide is 30%, and the dropping time is 1 hour, continues to react for 0.5 hour after dropping, reacts The pressure of the system is 1 atm.
[0027] The analysis results showed that the conversion rate of cyclohexanone was 99.4%, the selectivity of cyclohexanone oxime was 99.8%, and the utilization rate of hydrogen peroxide was 99.8%.
Embodiment 2
[0029] Implementation process is except following difference, and all the other are all the same with embodiment 1:
[0030] In the first step, the weight ratio of cyclohexanone:catalyst is 1:0.05, and that of cyclohexanone:solvent is 1:10; in the second step, the molar ratio of cyclohexanone:hydrogen peroxide is 1:1.
[0031] The analysis results showed that the conversion rate of cyclohexanone was 98.4%, the selectivity of cyclohexanone oxime was 99.5%, and the utilization rate of hydrogen peroxide was 99.2%.
Embodiment 3
[0033] Implementation process is except following difference, and all the other are all the same with embodiment 1:
[0034] In the first step, according to the weight ratio of cyclohexanone: the catalyst is 1: 0.1, and the cyclohexanone: solvent is 1: 10; The ratio is 1:1.3, the time for dropping is 2 hours, and the reaction is continued for 1 hour after the dropwise addition is completed.
[0035] The analysis results showed that the conversion rate of cyclohexanone was 99.8%, the selectivity of cyclohexanone oxime was 99.9%, and the utilization rate of hydrogen peroxide was 99.9%.
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