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本文将水溶性磺化三苯基膦铑配合物催化剂负载在SiO_2表面使其复相化,考察不同制备方法制得催化剂的性能及对反应活性和选择性的影响。这种负载化水溶性Wilkinson催化剂比表面积较大,可在适当过量配体存在下保持较高的催化活性;当液态高碳烯烃十一烯酸甲酯和1-己烯在固定床加压流动态反应器中连续进行氢甲酰化催化反应时,产物醛的选择性大于95%;正异醛比(n/i值)随P/Rh摩尔比的提高而提高P/Rh=15,产物中正构醛大于或接近80%(n/i为4)。P/Rh>15后,配体增多几乎不再提高产物n/i值,而影响反应速度。
In this paper, the water-soluble sulfonated triphenylphosphine rhodium complex catalyst was loaded on the surface of SiO 2 to make it phase-complexed. The effects of different preparation methods on the performance of the catalyst and its reactivity and selectivity were investigated. This kind of supported water-soluble Wilkinson catalyst has a large specific surface area and can maintain a high catalytic activity in the presence of an appropriate excess of ligand. When the liquid high-carbon olefin methyl undecylenate and 1-hexene are pressurized in a fixed bed pressurized stream When the hydroformylation reaction is carried out continuously in a dynamic reactor, the aldehyde selectivity of the product is more than 95%; the n / i ratio increases with the P / Rh molar ratio as P / Rh = 15, and the product The n-normal aldehyde is at or above 80% (n / i is 4). After P / Rh> 15, the increase of ligand almost no longer increases the product n / i value, which affects the reaction speed.