Metal clad type catalyst used for benzene selective hydrogenation alkylation to prepare cyclohexylbenzene and preparing method and using method thereof
A metal coating and selective hydrogenation technology, which is applied in catalyst activation/preparation, physical/chemical process catalysts, hydrogenation to hydrocarbons, etc., can solve problems such as service life, benzene conversion rate and cyclohexylbenzene selectivity are not ideal, Achieve the effects of easy recycling and regeneration, increased acidity, and good economic and social benefits
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Embodiment 1
[0045] A metal-coated catalyst for preparing cyclohexylbenzene by selective hydroalkylation of benzene, the steps are as follows:
[0046] S1, remove the organic template in the Na-type Beta molecular sieve by two-stage roasting method:
[0047] Accurately weigh 5 g of Na-type Beta molecular sieves, and evenly distribute the Na-type Beta molecular sieves in an evaporating dish, place them in a muffle furnace, and program the temperature rise, the first stage is to raise the temperature to 200 °C (heating rate is 5 °C / min), Keep for 5 h; the second stage is heated to 550 °C (heating rate is 5 °C / min), and kept for 8 h; after the calcination is completed, it is naturally cooled to room temperature in a muffle furnace, and placed in a vacuum drying oven for later use;
[0048] S2, carry out H exchange to Na-type Beta molecular sieve obtained in step S1, obtain H-type Beta molecular sieve:
[0049] S2.1, take out the Na-type Beta molecular sieve sample placed in the vacuum drying...
Embodiment 2
[0062] A metal-coated catalyst for preparing cyclohexylbenzene by selective hydroalkylation of benzene, the steps are as follows:
[0063] S1. Remove the organic template in the Na-type MOR molecular sieve by two-stage calcination:
[0064] Accurately weigh 5 g of Na-type MOR molecular sieves, and evenly distribute the Na-type MOR molecular sieves in an evaporating dish, place them in a muffle furnace, and raise the temperature in the first stage to 200 °C (heating rate is 5 °C / min). Keep for 5 h; the second stage heats up to 550 °C (heating rate is 5 °C / min) and keeps for 8 h; after the calcination is completed, it is naturally cooled to room temperature in a muffle furnace and placed in a vacuum oven for later use;
[0065] S2. Perform H exchange on the Na-type MOR molecular sieve obtained in step S1 to obtain the H-type MOR molecular sieve:
[0066] S2.1, take out the Na-type MOR molecular sieve sample placed in the vacuum drying oven in step S1, add it to the exchange ket...
Embodiment 3
[0079] A metal-coated catalyst for preparing cyclohexylbenzene by selective hydroalkylation of benzene, the steps are as follows:
[0080] S1, remove the organic template in the Na-type Y molecular sieve by two-stage roasting method:
[0081] Accurately weigh 5 g of Na-type Y molecular sieves, and evenly distribute the Na-type Y molecular sieves in an evaporating dish, place them in a muffle furnace, and program the temperature to rise to 200 °C in the first stage (the heating rate is 5 °C / min). Keep for 5 h; the second stage heats up to 550 °C (heating rate is 5 °C / min) and keeps for 8 h; after the calcination is completed, it is naturally cooled to room temperature in a muffle furnace and placed in a vacuum oven for later use;
[0082] S2. Perform H exchange on the Na-type Y molecular sieve obtained in step S1 to obtain H-type Y molecular sieve:
[0083] S2.1, take out the Na-type Y molecular sieve sample placed in the vacuum drying oven in step S1, add it to the exchange k...
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