A kind of preparation method of gold-based catalyst for acetylene hydrochlorination reaction
An acetylene hydrochlorination and catalyst technology, applied in catalyst activation/preparation, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problem of low conversion rate of acetylene, cumbersome synthesis steps, The problem of high synthesis cost, to achieve the effect of more repeatable results, fast mass and heat transfer, and good catalytic performance
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Embodiment 1
[0035] Embodiment 1 catalyst preparation
[0036] Weigh 2997mg 200 mesh activated carbon (AC*) in a beaker, the carbon carrier is unpretreated 200 mesh special activated carbon for electroplating decolorization, add 15ml of ethanol, stir and disperse evenly, measure 631μl prepared HAuCl 4 ·xH 2 O in IPA solution (each 100ul solution contains 1mg HAuCl 4 ·xH 2 O) In a beaker, the mass content of Au in the chloroauric acid is Au≥47.5%, and 15ml of isopropanol is added for ultrasonic dispersion. Place the above two beakers in the continuous flow device, adjust the peristaltic pump, first inject the two samples into the same position of the tee, set the flow rate (1ml / min) and start the switches of the two pumps at the same time, after waiting for 15 minutes, the two liquids After the mixing is completed, collect them in a petri dish, put the petri dish into a blast drying oven at 90° C. to dry for 12 hours, and seal it after finishing. The yield in this example was 3 grams of...
Embodiment 2
[0056] Embodiment 2 catalyst preparation
[0057] Weigh 5994mg of 200 mesh activated carbon (AC*) into a beaker, add 30ml of ethanol and stir to disperse evenly, measure 1262μl of prepared HAuCl 4 ·xH 2 O in IPA solution (each 100ul solution contains 1mg HAuCl 4 ·xH 2 O) In a beaker, add 30ml of isopropanol and ultrasonically disperse evenly. Place the above two beakers in the continuous flow device, adjust the peristaltic pump, first inject the two samples into the same position of the tee, set the flow rate (1ml / min) and start the two pump switches at the same time, wait for 30 minutes, the two liquid After the mixing is completed, collect them in a petri dish, put the petri dish into a blast drying oven at 90° C. to dry for 12 hours, and seal it after finishing. The yield in this example was 6 grams of product per 30 minutes.
Embodiment 3
[0058] Embodiment 3 Acetylene hydrochlorination reaction activity test
[0059] The gold-based catalysts prepared in Example 1 and Comparative Examples 1-1, 1-2, 1-3, 1-4, 1-5, 1-6 were processed at 150°C (5°C / min) with 30ml / min of N 2 Purge for 30min, with V (C2H2) =25ml / min, V (HCl) =26.3ml / min flow rate into the reaction gas and keep it for 10min, when the reaction gas ratio is V (C2H2) / V (HCl) The activity test was carried out under the condition of =1:1.05, and the test results are shown in Table 1.
[0060] Table 1 Acetylene Hydrochlorination Reactivity Test
[0061]
[0062]
[0063] The ICP test result of embodiment 1
[0064] Table 2 ICP results
[0065]
[0066] As can be seen from Table 1, in the catalyst 0.1% Au (15ml IPA) / AC * (15ml EtOH), at the reaction temperature of 180 ° C, GHSV = 260h -1 Under the condition, the conversion rate of acetylene is as high as 91.2%, and the selectivity of vinyl chloride is higher than 99.0%, which is the opti...
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