Study on the Mechanism of Methylchlorosilanes Disproportionation Catalyzed by AlCl3/(AlCl2) $$_{Z}^{{Z + }}$$ -γ-Al2O3

Study on the mechanism of catalytic synthesis of dimethyldichlorosilane by AlCl3/MIL‐53(Al)@γ‐Al2O3

“…As a classical strong Lewis acid catalyst, AlCl 3 shows good catalytic activity in the disproportionation of methyltrichlorosilane and trimethylchlorosilane to dimethyldichlorosilane. In view of the fact that AlCl 3 is easy to sublimate and extremely unstable in the reaction, related improvement research has been carried out, such as the reportedly improved catalysts AlCl 3 /γ-Al 2 O 3 , [12] AlCl 3 /ZSM-5 [13] (Zeolite Socony Mobil-5, abbreviated as ZSM-5), AlCl 3 /ZSM-5@γ-Al 2 O 3 , [14] and so forth. The active sites of these catalysts have a common feature in that they have Al-O-H Bronsted acid active sites before AlCl 3 loading and form Al-O-Al-Cl bonds after the loading.…”

“…γ-Al 2 O 3 is helpful in the disproportionation of dimethyldichlorosilane, and previous studies have shown that core-shell catalysts prepared from two different supports with Al-O-H sites have better catalytic activity than the single supported ones after loading with AlCl 3 . [12,14] Therefore, combining AlCl 3 /MIL-53(Al) and γ-Al 2 O 3 is very likely to produce better catalysts. The internal mechanism of the disproportionation reaction catalyzed by AlCl 3 /MIL-53(Al)@γ-Al 2 O 3 was studied via the density functional theory (DFT) [27][28][29] in this research.…”