Catalyst for preparing cyclohexanol through cyclohexene hydration and application of catalyst
A cyclohexene hydration and catalyst technology, which is applied in the direction of molecular sieve catalysts, physical/chemical process catalysts, hydroxyl addition preparation, etc., can solve the problems of short life of ion exchange resins, equipment corrosion, poor thermal stability, etc., and achieve easy regeneration and Effects of repeated use, reduction of mass transfer resistance, and improvement of activity
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[0025] Example 1
[0026] 50 grams of Nb prepared in Comparative Example 1 2 O 5 Load HZSM-5 catalyst, put in 300 ml of trimethylchlorosilane-toluene solution with a concentration of 0.1 g / ml, stir at room temperature for 3 hours, then filter with sand core funnel and use 100 ml of carbon tetrachloride and 100 ml The ethanol was washed three times, and finally dried at 50°C for 5 hours to obtain the loaded Nb 2 O 5 The amphiphilic HZSM-5 catalyst is denoted as TMCS-Nb / HZSM-5.
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[0027] Examples 2-11
[0028] The preparation method is the same as in Example 6, except that the silylation reagent is changed to hexamethyldisilazane (HMDSZ), triethylchlorosilane (TECS), triisopropylchlorosilane (TIPCS), and cyclohexyltrichlorosilane (CHTCS), dimethylvinylchlorosilane (DMVCS), dimethylisopropylchlorosilane (TMCS), tert-butyldimethylchlorosilane (TBDMCS), dimethyloctylchlorosilane (DMOCS), Octadecyltrichlorosilane (OTCS), n-octyltrichloroazane, etc. (OTCSZ). Manufactured load Nb 2 O 5 The amphiphilic HZSM-5 catalysts are denoted as HMDSZ-Nb / HZSM-5, TECS-Nb / HZSM-5, TIPCS-Nb / HZSM-5, CHTCS-Nb / HZSM-5, DMVCS-Nb / HZSM- 5. TMCS-Nb / HZSM-5, TBDMCS-Nb / HZSM-5, DMOCS-Nb / HZSM-5, OTCS-Nb / HZSM-5 and OTCSZ-Nb / HZSM-5.
Example Embodiment
[0029] Example 12
[0030] The amphiphilic supported niobium HZSM-5 catalyst prepared in Examples 1-11 was applied to the reaction of cyclohexene hydration to prepare cyclohexanol, and the reaction results were compared to evaluate the performance of the catalyst prepared in each example. The evaluation method is the same as that of Comparative Example 1. Table 1 shows the activity evaluation results of the catalysts prepared in Examples 1-11.
[0031] Table 1 The influence of catalysts modified with different silylation reagents on the hydration reaction
[0032]
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