O-phenyl phenol preparation catalyst by cyclohexanone dimer dehydrogenation and preparation method thereof
A technology of cyclohexanone dimer and o-phenylphenol is applied in the field of catalyst and preparation field for preparing o-phenylphenol by dehydrogenation of cyclohexanone dimer, and can solve the problem of low conversion rate and selectivity, low catalyst The problems of poor stability and high catalyst cost can achieve the effect of simple activation and regeneration procedure, improved structural stability, high yield and selectivity
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[0035] Example 1
[0036] Weigh 1300 grams of pseudo-boehmite and 1000 grams of water and mix and stir to prepare pseudo-boehmite slurry. After stirring, add 82 grams of lanthanum nitrate hexahydrate (La(NO) dissolved in 600 ml of deionized water while stirring. 3 ) 3 ·6H 2 O) Aqueous solution, stir to make it fully dissolved, evenly disperse, add nitric acid solution dropwise, dissolve until the pseudo-boehmite slurry becomes a sol state, after drying the sol at 100~120℃, at 500℃ It is calcined for 6 hours, and then developed into 20-40 mesh particles after cooling to obtain lanthanum oxide modified alumina (La 2 O 3 / γ-Al 2 O 3 ).
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[0037] Example 2
[0038] Weigh 0.148 g of potassium sulfate and dissolve it in 6 ml of deionized water, take 8 g of the catalyst carrier in Example 1 and soak for 4 hours, then dry at a constant temperature of 100-120°C for 10 hours, and calcinate at 500°C for 6 hours; measure 0.02 g / ml of chloroplatinic acid (H 2 PtCl 6 ·6H 2 O) Add 3.19ml of solution to deionized water to make 6ml solution, and immerse the previously calcined catalyst in it for 4 hours, then dry it at a constant temperature of 100-120°C for 10 hours, and calcinate it at 500°C for 6 hours. Finally, the catalyst is activated with hydrogen diluted with nitrogen, the nitrogen flow rate is 60ml / min, and the hydrogen flow rate is 6ml / min. Under the pressure of 0.1MPa, reductive activation is carried out in a fixed bed reactor at 380°C for 6 hours until there is no steam at the outlet of the reactor, and it is cooled for use.
[0039] The composition of the catalyst is as follows: (based on the percentage weight of t...
Example Embodiment
[0042] Example 3
[0043] Except that the amount of potassium sulfate was changed to 0.296 g, and the chloroplatinic acid solution was changed to 4.26 ml. The catalyst preparation conditions were the same as in Example 2.
[0044] The composition of the catalyst is as follows: (based on the percentage by weight of the active component in the carrier)
[0045] Catalyst composition (wt%)
[0046]
[0047] The catalyst performance evaluation results are shown in Table 1.
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