A method for preparing high-purity l-menthone
A menthone, high-purity technology, applied in the field of preparation of high-purity L-menthone, can solve the problems of low reaction cost, etc., and achieve the effects of good activation of free radicals, good catalytic performance, remarkable operability and economy
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Embodiment 1
[0056] 1) Ultrasonic disperse 0.852g graphene oxide in 106.5mL ethanol, under the protection of nitrogen, slowly add 42.6mg (0.289mmol) tetraethylammonium hydroxide while stirring, heat the oil bath to 100°C and reflux for 24h, cool, Suction filtration, washing with ethanol for 6 times, and drying in a vacuum oven overnight to obtain graphene solid powder loaded with tetraethylammonium hydroxide.
[0057] 2) Disperse 0.895g of graphene solid powder loaded with tetraethylammonium hydroxide prepared in step 1) in 111.875mL of absolute ethanol, slowly add 12mg (0.058mmol) of RuCl 3 , and the mixture was stirred at room temperature for 24h. After the reaction is completed, filter with suction, wash with a large amount of absolute ethanol and deionized water, and dry the obtained filter cake at 70° C. for 24 hours. After drying, it is ground to a powder for future use, which is recorded as a ruthenium catalyst supported on a solid organic base. A total of 0.907 g of catalyst was ...
Embodiment 2
[0059] 1) Ultrasonic disperse 0.912g graphene oxide in 91.28mL ethanol, under the protection of nitrogen, slowly add 73mg (1.301mmol) potassium hydroxide while stirring, heat the oil bath to 110°C and reflux for 24h, cool, filter with Washed with ethanol for 6 times, and dried overnight in a vacuum oven to obtain a graphene solid powder loaded with potassium hydroxide.
[0060] 2) Disperse 0.986g of graphene solid powder loaded with potassium hydroxide prepared in step 1) in 98.6mL of absolute ethanol, slowly add 18mg (0.087mmol) of RuCl 3 , and the mixture was stirred at room temperature for 24h. After the reaction is completed, filter with suction, wash with a large amount of absolute ethanol and deionized water, and dry the obtained filter cake at 70° C. for 24 hours. After drying, it is ground to a powder for future use, which is recorded as a ruthenium catalyst supported on a solid inorganic base. A total of 1 g of catalyst was obtained, the mass fraction of ruthenium w...
Embodiment 3
[0062] 1) Ultrasonic disperse 0.8g graphene oxide in 88.84mL ethanol, under the protection of nitrogen, slowly add 80mg (0.579mmol) potassium carbonate while stirring, heat the oil bath to 120°C and reflux for 24h, cool, filter with ethanol, After washing 6 times, the vacuum oven was dried overnight to obtain a graphene solid powder loaded with potassium carbonate.
[0063] 2) Disperse the 0.88g graphene solid powder loaded with potassium carbonate prepared in step 1) in 97.7mL absolute ethanol, slowly add 6mg (0.029mmol) of RuCl 3 , and the mixture was stirred at room temperature for 24h. After the reaction is completed, filter with suction, wash with a large amount of absolute ethanol and deionized water, and dry the obtained filter cake at 70° C. for 24 hours. After drying, it is ground to a powder for future use, which is recorded as a ruthenium catalyst supported on a solid inorganic base. A total of 0.886 g of catalyst was obtained, the mass fraction of ruthenium eleme...
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