Method for selective synthesis of p-xylene from 4-methyl-3-cyclohexene-1-carbaldehyde
A technology of cyclohexene formaldehyde and p-xylene, which is applied in the direction of chemical instruments and methods, hydrocarbons, hydrocarbons, etc., can solve the problems of high energy consumption and long process route, and achieve high selectivity and simple reaction process , the effect of short reaction route
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[0040] Example 1: Fill a tubular reactor (inner diameter 10mm) with 30wt% W 2 1.0g of C / AC solid catalyst, heated to 400°C, flowed nitrogen as carrier gas from the upper part of the reaction tube at a flow rate of 20ml / min. 2 To purge the carrier gas for 1 hour to remove water, the obtained 4-methyl-3-cyclohexene formaldehyde was injected into the gasification chamber at 1 ml / h, and supplied to the catalyst layer under the diversion of nitrogen. After reacting for 1 h, 792 mg of organic layer was obtained from the collection container at the lower end of the reaction tube. Combined with GC-MS, the conversion rate and p-xylene yield were calculated quantitatively, and the reaction results are listed in Table 1.
Example Embodiment
[0041] Example 2-5: Under the same conditions as Example 1, the catalyst was replaced with 30wt% W 2 C / CB, W 2 C / ACF, W 2 C / SiO 2 , W 2 C / Al 2 O 3 , Other reaction conditions are the same as in Example 1, the conversion rate and yield of the reaction are calculated, and the reaction results are listed in Table 1.
[0042] Examples 6-11: The same catalyst as in Example 1, the reaction temperature was controlled to 250°C, 275°C, 300°C, 325°C, 350°C, 375°C, and other reaction conditions were the same as in Example 1. The conversion of the reaction was calculated The reaction results are listed in Table 2.
Example Embodiment
[0043] Example 12-17: The same conditions as Example 1, the W 2 The load of C / AC was changed to 1wt%, 5wt%, 10wt%, 15wt%, 45wt%, 60wt%, and other conditions were the same as in Example 1. The conversion rate and yield of the reaction were calculated, and the reaction results were listed in the table 3 in.
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