A kind of preparation method and application of cu/al-sba-15 bimetallic composite catalyst
An al-sba-15, bimetallic technology, applied in the direction of physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problem of difficult formation, difficult matching of metal source and silicon source hydrolysis polymerization speed, and difficult formation etc. to achieve the effects of reducing raw material costs, improving hydrothermal stability, and saving solvents
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Embodiment 2
[0037] A preparation method of a Cu / Al-SBA-15 bimetallic composite catalyst—mixing and stirring for 6 hours, crystallization at 120° C.; continuous stirring for 4 hours, drying at 80° C. for 8 hours, and drying for 8 hours. The following are specific implementations:
[0038] Take 0.6150g Al (NO 3 ) 3 ·9H 2 O, add it into a round-bottomed flask containing 80 mL of deionized water and stir until it is completely dissolved, and adjust the pH of the solution to 2; weigh 1 g of the prepared rod-shaped SBA-15 mesoporous molecular sieve, and add a solution containing an aluminum source. The mixture was continuously stirred at room temperature for 6 hours; the obtained mixed solution was transferred to a crystallization kettle lined with polytetrafluoroethylene, and the crystallization was continued at 120 ° C for 24 hours; the crystallized mixture was mixed with deionized water and absolute ethanol. After washing, drying, and then calcining at high temperature, in the process of h...
Embodiment 3
[0040] Example 3 (catalyst dosage 3.57wt%)
[0041] The compounds p-chlorothiophenol, iodobenzene, cesium carbonate (Cs 2 CO 3 ), Cu / Al-SBA-15 bimetallic composite catalyst and solvent dimethyl sulfoxide (DMSO), the molar ratio of compound p-chlorothiophenol and iodobenzene was 4:1, and the reaction was carried out under constant temperature stirring at 120 °C The reaction was re-refluxed and monitored by TCL.
[0042] Compounds A and B are 1.6 mmol and 0.4 mmol of p-chlorothiophenol and iodobenzene respectively. The dosage of Cu / Al-SBA-15 bimetallic composite catalyst is 3.57wt%. Cs 2 CO 3 The dosage is 2 mmol, and the dosage of solvent DMSO is 4 mL; after 2 hours of reaction, TCL monitors that the compound iodobenzene reacts completely, and the reaction ends, generating C target product 5-chloro-2-(phenylthio)phenol, which is subjected to gas-mass spectrometry (GC-MS) detected a yield of 25%.
Embodiment 4
[0043] Example 4 (catalyst dosage 7.14wt%)
[0044] The compounds p-chlorothiophenol, iodobenzene, cesium carbonate (Cs 2 CO 3 ), Cu / Al-SBA-15 bimetallic composite catalyst and solvent dimethyl sulfoxide (DMSO), the molar ratio of compound p-chlorothiophenol and iodobenzene was 4:1, and the reaction was carried out under constant temperature stirring at 120 °C The reaction was re-refluxed and monitored by TCL.
[0045] Compounds A and B are 1.6 mmol and 0.4 mmol of p-chlorothiophenol and iodobenzene respectively. The dosage of Cu / Al-SBA-15 bimetallic composite catalyst is 7.14 wt%. Cs 2 CO 3 The dosage is 2 mmol, and the dosage of solvent DMSO is 4 mL; after 2 hours of reaction, TCL monitors that the compound iodobenzene reacts completely, and the reaction ends, generating C target product 5-chloro-2-(phenylthio)phenol, which is subjected to gas-mass spectrometry (GC-MS) detected a yield of 51%.
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