Catalyst for preparing cyclohexylbenzene through hydroalkylation of benzene, and preparation method and application of catalyst
A cyclohexylbenzene and catalyst technology, applied in carbon compound catalysts, physical/chemical process catalysts, catalysts, etc., can solve the problems of low catalytic activity, low selectivity of cyclohexylbenzene, high price, etc. High performance and simple operation
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[0029] The present invention also provides a preparation method for the catalyst described in the above technical scheme, comprising the following steps:
[0030] (1) mixing non-precious metal salt solution, protective agent and complexing agent to obtain a mixed solution;
[0031] (2) sequentially adding molecular sieves and precipitating agents to the mixed solution obtained in the step (1), performing a hydrothermal reaction to obtain a precursor;
[0032] (3) Roasting the precursor obtained in the step (2) to obtain a catalyst for preparing cyclohexylbenzene by hydroalkylation of benzene.
[0033] The invention mixes the non-precious metal salt solution, the protecting agent and the complexing agent to obtain the mixed solution. In the present invention, there is no special limitation on the operation of mixing the non-precious metal salt solution, the protective agent and the complexing agent, and the technical solution for preparing the mixed solution well known to thos...
Embodiment 1
[0061] 1. Preparation of a catalyst for the preparation of cyclohexylbenzene by hydroalkylation of benzene
[0062] (1) To 70mL of NiCl with a concentration of 31.5mg / mL 2 Add 30ml of ethylene glycol and 10ml of ethylenediamine to the deionized aqueous solution, and stir at room temperature for 1 hour to obtain a mixed solution;
[0063] (2) In the mixed solution that described step (1) obtains, add the Hβ molecular sieve of 10g, continue to stir at room temperature for 30min, then add 2.0g sodium hydroxide and 6.14g urea, continue to stir at room temperature for 30min, then place in a sealed hydrothermal kettle , hydrothermal reaction at 90°C for 4 hours, after the reaction was completed, the reactor was cooled to room temperature, the obtained product was suction filtered, washed three times with deionized water and ethanol with a volume fraction of 50%, and then dried at 100°C 8 hours to get the precursor
[0064] (3) The precursor obtained in the step (2) was calcined in...
Embodiment 2
[0070] According to the method of Example 1, a catalyst for the preparation of cyclohexylbenzene by hydroalkylation of benzene was prepared, wherein the molecular sieve was 10 g HY molecular sieve, and the finally prepared catalyst was recorded as 10Ni / HY. The same method was used to apply the prepared 10Ni / HY catalyst to the hydrogenation of benzene to cyclohexylbenzene. The specific experimental results are shown in Table 1.
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