Preparation method and application of MXene-based catalyst carrier and catalyst for acetylene hydrochlorination reaction
A technology of acetylene hydrochlorination and catalyst support, which is applied in the direction of catalyst activation/preparation, catalyst support, chemical instruments and methods, etc. It can solve the problems of restricting the excellent characteristics of MXene, stacking and agglomeration of MXene, and the decline of electrical conductivity, so as to promote the desorption of products. Attached, the reagent is easy to get, and the effect of high stability
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Embodiment 1
[0042] A kind of preparation method and application based on MXene acetylene hydrochlorination carrier for high stability and long life, comprising the following steps:
[0043] 1) Add 2g of LiF powder to 50ml of HCl solution with a concentration of 9mol / L, dissolve it fully and slowly add 5g of MAX powder, then add 5g of MAX powder in an ultrasonic-assisted 20°C oil bath at 20kHz, stirring at a rate of 500r / min, stirring and etching for 8h Then, centrifuged and washed with deionized water at 2000 rpm for 30 min, and washed to pH=6 to obtain multi-layer MXene precipitation;
[0044] 2) 5g of multilayer MXene precipitates were redispersed into 10ml of methanol to form a suspension, 10g of 1-ethyl-2,3-dimethylimidazolium hexafluorophosphate was added to the suspension, and the frequency was set to 50Hz, Stand for 8h in a low-frequency electromagnetic field with a strength of 0.2μT;
[0045] 3) The mixture left standing in step 2) was vacuum-dried under the condition of 100° C. ...
Embodiment 2
[0049] A kind of preparation method and application based on MXene acetylene hydrochlorination carrier for high stability and long life, comprising the following steps:
[0050] 1) Add 8g of LiF powder to 150ml of HCl solution with a concentration of 9mol / L, and then slowly add 5g of MAX powder after fully dissolving, and then add 5g of MAX powder slowly, assisted by 30kHz ultrasonic wave in a 30°C oil bath, stirring at a rate of 600r / min, stirring and etching for 8h Then, centrifuge and wash with deionized water at 3000 rpm repeatedly, the washing time is 60 min, and wash to pH=6 to obtain multi-layer MXene precipitation;
[0051] 2) 5g of multilayer MXene precipitates were redispersed into 10ml of ethanol to form a suspension, and 10g of 1-methyl-3-hexadecylimidazole bis-trifluoromethanesulfonic imide salt was added to the suspension, and it was placed in the frequency for 24h in a low-frequency electromagnetic field of 60Hz and an intensity of 0.4μT;
[0052] 3) The mixtur...
Embodiment 3
[0056] A kind of preparation method and application based on MXene acetylene hydrochlorination carrier for high stability and long life, comprising the following steps:
[0057] 1) Add 6g of LiF powder to 80ml of HCl solution with a concentration of 9mol / L, fully dissolve and then slowly add 6g of MAX powder, assisted by ultrasonic waves at 40kHz in an oil bath at 40°C, stirring at a rate of 500r / min, stirring and etching for 14h Then, centrifuge and wash with deionized water at 3000 rpm repeatedly, the washing time is 60 min, and wash to pH=6 to obtain multi-layer MXene precipitation;
[0058] 2) 5g multilayer MXene precipitate was redispersed into 10ml n-propanol to form a suspension, then 10g trimethylimidazole tetrafluoroborate was added to the suspension, and it was placed under a frequency of 50Hz and an intensity of 0.2μT. Standstill in low frequency electromagnetic field for 8h;
[0059] 3) The mixture left standing in step 2) was vacuum-dried at 100° C. for 12 h to o...
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