High-activity nickel-based acetone hydrogenation catalyst and preparation method thereof
A hydrogenation catalyst, catalyst technology, applied in catalyst activation/preparation, hydroxyl compound preparation, chemical instruments and methods, etc., can solve the problems of low reaction selectivity, high reaction temperature, poor stability, etc., and achieve high catalyst activity, The effect of uniform particle size distribution and stable performance
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Embodiment 1
[0037] 1) Preparation of catalyst precursor
[0038] 490gNi(NO 3 ) 2 ·6H 2 O, 12.4g (NH 4 ) 6 Mo 7 o 24 4H 2 O, 26.2gMg(NO 3 ) 2 ·6H 2 O, 8.1gFe(NO 3 )3 9H 2 O was dissolved in 500 g of deionized water to prepare an aqueous solution. The oil phase is prepared by adding 23.25 g of sodium dodecylbenzenesulfonate and 22.6 g of n-butanol to 426 g of n-octane and mixing uniformly. The aqueous solution and the oil phase were stirred by a high-shear emulsifier for 15 minutes to prepare microemulsion I. 210gNa 2 CO 3 . Dissolve in 800g deionized water, add 53.25g sodium dodecylbenzenesulfonate, 42.6g n-butanol, 426g n-octane, high shear emulsification for 15min, and prepare microemulsion II. Add 2.0g NaOH to the reaction kettle to make a 1000mL solution, start the stirring and heating system to 90°C, turn on the ultrasonic system, the ultrasonic output frequency is 40W, add solution Ⅰ and solution Ⅱ into the reaction kettle in parallel, and control the reaction time at...
Embodiment 2
[0049] Increase 2.4gCa(NO in the aqueous solution in the preparation process of embodiment 1 catalyst precursor 3 ) 2 4H 2 O, the oil phase in the microemulsion I was prepared by adding 53.25 g of sodium dodecylbenzenesulfonate and 42.6 g of dodecyl alcohol into 379 g of n-octane and mixing uniformly.
[0050] During the kneading and molding process of the catalyst precursor, add 2.0 g of carboxymethyl cellulose, 4.0 g of kale powder, 150 mL of 5% nitric acid, 36 g of pseudoboehmite, 6.0 g of macroporous silica gel, and 5 mL of 2% silane coupling agent as a forming aid.
[0051] During the catalyst reduction and passivation process, at 400°C, N 2 、H 2 The mixture is restored.
[0052] Catalyst performance evaluation conditions are the same as in Example 1. The reaction results are shown in Table 1.
Embodiment 3
[0054] Mg(NO 3 ) 2 ·6H 2 O increased to 55g, 12.4g (NH 4 ) 6 Mo 7 o 24 4H 2 O to 34gNa 2 MoO 4 2H 2 O, the ultrasonic output power is increased to 60W, Ca(NO 3 ) 2 4H 2 The mass increase of O is 4.6g.
[0055] During the kneading and molding process of the catalyst precursor, add 2.0 g of carboxymethyl cellulose, 5.0 g of scallop powder, 160 mL of 3% nitric acid, 36 g of pseudoboehmite, 6.0 g of macroporous silica gel, and 5 mL of 2% silane coupling agent as a forming aid.
[0056] During the catalyst reduction and passivation process, at 420°C, N 2 、H 2 Mixed gas reduction 3.0h.
[0057] Catalyst performance evaluation conditions are the same as in Example 1. The reaction results are shown in Table 1.
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