Supported non-metallic catalyst and its preparation method and application
A non-metallic catalyst, supported technology, applied in the field of vinyl chloride monomer preparation, can solve problems such as heavy metal mercury pollution of the environment, and achieve the effects of avoiding environmental pollution, simplifying the preparation process, and saving energy
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Embodiment 1
[0066] 5wt% HNO 3 The pretreated coconut shell activated carbon (reference) was used as a catalyst to test the catalytic performance of acetylene hydrochlorination.
[0067] 5ml of the above catalyst was charged into a tubular fixed bed reactor for catalyst performance evaluation. The evaluation conditions are as follows: use HCl at the bed temperature (volume space velocity 144 h before the reaction) -1 ) was activated for 30 min in advance, the catalyst bed temperature was 240 °C, the gas pressure in the reactor was 101.325 kP, and the volumetric space velocity of acetylene was 60 h -1 , the raw gas ratio V C2H2 / V HC1 = 1:1.2. The components of the reacted product were analyzed by gas chromatography. The catalyst evaluation results showed that the initial conversion rate of acetylene was 32.8%, and the selectivity of vinyl chloride reached 99.1%.
Embodiment 2
[0069] First, 1.00g of DBU was dissolved in 7.00g of absolute ethanol, stirred and dissolved to obtain an impregnation solution, and then 5.00g of 5wt% HNO was added to the above impregnation solution. 3 The pretreated coconut shell activated carbon makes the activated carbon completely absorb the impregnating liquid, then it is sealed and impregnated at 25°C for 10h to complete the impregnation process, and finally dried in a 100°C oven for 10h and cooled to room temperature to obtain a supported non-metallic catalyst, denoted as C1# .
[0070] 5ml of the above-mentioned C1# catalyst was loaded into a tubular fixed bed reactor for catalyst performance evaluation. The evaluation conditions are as follows: use HCl at the bed temperature (volume space velocity 144 h before the reaction) -1 ) was activated for 30 min in advance, the catalyst bed temperature was 240 °C, the gas pressure in the reactor was 101.325 kP, and the volumetric space velocity of acetylene was 60 h -1 , t...
Embodiment 3
[0073] Take 5ml of C1# catalyst in Example 2 and load it into a tubular fixed bed reactor for catalyst performance evaluation. The evaluation conditions are as follows: use HCl at the bed temperature (volume space velocity 72h) before the reaction -1 ) was activated for 30min in advance, the catalyst bed temperature was 240℃, the gas pressure in the reactor was 101.325kP, and the volumetric space velocity of acetylene was 10h -1 , the raw gas ratio V C2H2 / V HC1 = 1:1.2.
[0074] The product after the reaction is analyzed by gas chromatography, and the catalyst evaluation results show that the conversion rate of acetylene reaches 93.6%, and the selectivity of vinyl chloride reaches 99.2%.
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