Phân tích tư tưởng của nhân dân qua đoạn thơ: Những người vợ nhớ chồng… Những cuộc đời đã hóa sông núi ta trong Đất nước của Nguyễn Khoa Điềm
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Polymers present a class of materials that play a role of importance growing in catalysis. Polymeric catalysts based on polypropylene-polyacrylic acid (PP-APA) were prepared by the two methods: co-polymerization in the presence of transition metal ions (Cu(II), Fe(III), Co(II), Mn(II)…) and soaking method. Their catalytic activity was determined by oxidation reactions of ions S2- and hydroquinone by molecular oxygen in normal condition. It’s observed that, these catalysts showed high catalytic activity, which depends on the content, nature of metal ions supported and the condition of catalytic reactions. The re-usability of this type of Me/PP-APA in oxidation of S2- and hydroquinone was also studied.
Nội dung trích xuất từ tài liệu:
Preparation, characterization and catalytic properties of polymer-supported catalysts
