Supported catalyst for hydrogenation of alpha-pinene and preparation method and uses thereof
A catalyst and supported technology, applied in the chemical industry, can solve the problems of low cis-trans of pinane, difficult to improve product quality, harsh reaction conditions, etc.
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Embodiment 1
[0031] Example 1 In the nickel chloride aqueous solution with a concentration of 0.1mol / L, molecular sieves were added according to the nickel salt load as 4% mass fraction, fully stirred, and dried at 90°C for 20 hours after immersion for 8 hours; the dried mixture was placed at 200 Roast at ℃ for 3 hours, add appropriate amount of potassium hydroxide to the potassium borohydride solution with a concentration of 0.1mol / L, adjust to pH = 9; put the above potassium borohydride solution in a water bath at 20℃, press Ni:B =1:1 molar ratio Add the above roasted mixture, stir for 15min, filter and wash once with a certain amount of ammonia water, wash three times with distilled water, and wash twice with absolute ethanol.
[0032] The amount of catalyst used is 3% of the quality of α-pinene, α-pinene and catalyst are placed in the reaction kettle, vacuumized for ten minutes at a gauge pressure of 0.06MPa, replaced three times with nitrogen at 0.4MPa, and then hydrogen is used to Re...
Embodiment 2
[0035] Example 2 In the nickel chloride aqueous solution with a concentration of 0.5 mol / L, molecular sieves were added according to the nickel salt load as 12% mass fraction, fully stirred, and dried at 110°C for 12 hours after immersion for 12 hours; the dried mixture was dried at 250 Roast at ℃ for 2 hours, add appropriate amount of potassium hydroxide to the potassium borohydride solution with a concentration of 0.5mol / L, adjust to pH = 11; put the above potassium borohydride solution in a water bath at 0℃, press Ni:B =1:2 molar ratio Add the above roasted mixture, stir for 15min, filter and wash once with a certain amount of ammonia water, wash three times with distilled water, and wash twice with absolute ethanol.
[0036] According to the amount of catalyst used is 1.6% of the mass of α-pinene, α-pinene and catalyst are placed in the reaction kettle, vacuumized for ten minutes at a gauge pressure of 0.07MPa, replaced with nitrogen four times at 0.2MPa, and then hydrogen ...
Embodiment 3
[0039] Example 3 In the nickel chloride aqueous solution with a concentration of 1 mol / L, molecular sieves were added according to the nickel salt load of 20% mass fraction, fully stirred, and dried at 130°C for 20h after immersion for 24h; the dried mixture was dried at 350°C Roasting at lower temperature for 1h, add an appropriate amount of potassium hydroxide to the potassium borohydride solution with a concentration of 1mol / L to adjust to pH = 13; put the above potassium borohydride solution in a water bath at 40°C, and press Ni:B=1 after constant temperature : 3 molar ratio, add the above-mentioned roasted mixture, stir for 15min, wash once with a certain amount of ammonia water after filtering, wash three times with distilled water, and wash twice with absolute ethanol.
[0040] The amount of catalyst used is 0.2% of the mass of α-pinene, α-pinene and catalyst are placed in the reaction kettle, vacuumized for ten minutes at a gauge pressure of 0.08MPa, replaced three time...
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