Study on the HPA immobilisation on Al-SBA-15 support over Bronsted groups was written by Truong, Thi Hanh;Do, Van Cuong;Ngoc, Mai Do;Hung, Tran Quang;Doan, Huan Van;Nguyen, Thi Nhiem;Doan, Thi Hai;Le, Thi Hoai Nam;Nguyen, Tuyen Van;Bach, Long Giang;Tran, Quang Vinh. And the article was included in Molecular Catalysis in 2019.Safety of Ethyl 2-(2-methyl-1,3-dioxolan-2-yl)acetate The following contents are mentioned in the article:
In this article, a significant aspect of Bronsted groups in the preparation of HPA/Al-SBA-15 catalyst by immobilizing heteropoly acid H3PW12O40 (HPA) to mesoporous Al-SBA-15 support was studied. The crucial factors affected the preparation such as functional groups formed on the support, the use of HPA type for the immobilization (com. catalyst or in-situ synthetic HPA), and Si/Al molar ratio of Al-SBA-15 were systematically investigated. The prepared catalysts were tested their performance in polar reagent reactions (fructone synthesis was chosen as an example) to show the effect of HPA after the immobilizaton. Here we tested the HPA content (by Energy-dispersive X-ray method), acidity (by temperature-programmed desorption of ammonia method) and the Et acetoacetate conversion in fructone synthesis to prove this concept. The other characterization methods such as small angle x-ray scattering, Fourier-transform IR spectroscopy, sp. surface area and pore volume also showed the properties change of materials before and after HPA immobilization. It was shown that the HPA/Al-SBA-15 sample prepared by using HPA com. catalyst and NH+4 ion-exchanged Bronsted groups of mesoporous Al-SBA-15 support (Si/Al molar ratio of 15) showed the highest acidity and catalytic activity (Et acetoacetate conversion of 93.49 wt%) in comparison to HPA com. catalyst as well as to the other catalysts. In addition, this catalyst also showed good catalytic stability after five reaction cycles with slightly reduction of activity, suggesting the prospect of employing HPA/Al-SBA-15 catalyst for organic synthesis of polar compounds This study involved multiple reactions and reactants, such as Ethyl 2-(2-methyl-1,3-dioxolan-2-yl)acetate (cas: 6413-10-1Safety of Ethyl 2-(2-methyl-1,3-dioxolan-2-yl)acetate).
Ethyl 2-(2-methyl-1,3-dioxolan-2-yl)acetate (cas: 6413-10-1) belongs to dioxole derivatives. Dioxoles, particularly fluorinated dioxoles, are used as co-monomers to make polymers that find use in forming protective coatings for chemical resistance. Although benzodioxole is not particularly important, many related compounds containing the methylenedioxyphenyl group are bioactive, and thus are found in pesticides and pharmaceuticals.Safety of Ethyl 2-(2-methyl-1,3-dioxolan-2-yl)acetate
Referemce:
1,3-Benzodioxole – Wikipedia,
Dioxole | C3H4O2 – PubChem