Có 11+ tài liệu thuộc chủ đề "xúc tác hóa học"
000000272872-tt.pdf
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1 TÓM TẮT LUẬN VĂN THẠC SĨ Đề tài : Nghiên cứu tổng hợp đặc trưng và ứng dụng xúc tác Meso-SAPO Tác giả luận văn : Trần Quốc Hải Khóa 12B Người hướng dẫn : PGS.TS Nguyễn Khánh Diệu Hồng. Xuất phát từ ý tưởng tạo ra một loại xúc tác ưu việt cho quá trình cracking thu nhiên...
000000272872.pdf
dlib.hust.edu.vn Xem trực tuyến Tải xuống
Tổng quan về vật liệu rây phân tử. Tổng quan về vật liệu aluminophotphat. Cấu trúc aluminophotphat. Tổng hợp vât liệu silico-aluminophotphat có cấu trúc giống AFI. Lý thuyết quá trình tổng hợp SAPO-5. Cơ chế phản ứng cracking xúc tác. Các yếu tố ảnh hưởng đến quá trình cracking xúc tác. Tổng quan về cặn béo thải. Phương pháp...
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1.1 A personal look at the history of aqueous organometallic catalysis. this was the rule of thumb ever since the preparation of the first organometallic compounds. bonds may be easily decomposed in water by protonation. Some members of this family are soluble in water due to their ionic nature. Others obtain their solubility in water from the well soluble ligands...
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Ligands used for aqueous organometallic catalysis. Solubility of the catalysts in water is determined by their overall hydrophilic nature which may arise either as a consequence of the charge of the complex ion as a whole, or may be due to the good solubility of the ligands. Although transition metal complexes with small ionic ligands, such as halides, pseudohalides or...
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Hydrogenation is one of the most intensively studied fields of metal complex catalyzed homogeneous transformations. One of them concerns the activation of the hydrogen molecule [3]. Hydrogenation 49 Finally, dissociation of water always results in a certain concentration of conveniently expressed as the pH of the solution. Some of the catalysts and substrates also show acid-base behaviour themselves and their...
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It is mentioned, though, that there are reactions, in which the branched product is the more valuable one, as is the case of the hydroformylation of styrene.. It is now firmly established, that the two key catalytic species in the rhodium-catalyzed hydroformylation processes are the coordinatively unsaturated complexes and It is also generally accepted, that the n/i ratio of the...
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Carbonylation is one of the most important reactions leading to C-C bond formation. The process can be represented by the simple reactions of Scheme 5.1.. In general, carbonylation proceeds via activation of a C-H or a C-X bond in the olefins and halides or alcohols, respectively, followed by CO- insertion into the metal-carbon bond. In order to form the final...
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To attempt a comprehensive description of this field would be a hopless venture these days, and this chapter gives only examples of the most important ways of carbon-carbon bond formation in aqueous media. It has been discovered later that many of the reactions and catalysts do tolerate water or even proceed more favourably in aqueous solvents. It is characteristic of...
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The annual production of various polymers can be measured only in billion tons of which polyolefins alone figure around 100 million tons per year. The most important Ziegler-Natta, chromium- and metallocene-based catalysts, however, contain early transition metals which are too oxophilic to be used in aqueous media. Nevertheless, with the late transition metals there is some room for coordination polymerization...
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Catalytic oxidation of organic compounds is an extremely important field of chemistry, spanning the range from biological oxidations to large scale industrial production of commodity chemicals. 8.2) followed by aerobic oxidation of to in an excess of HC1 (eq. In a quest for a more environment-friendly process it has been found that reaction 8.4 can be catalyzed by Pd(II) complexes...
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Host-guest chemistry in aqueous organometallic catalysis. 10.1 Cyclodextrins and the formation of inclusion compounds. In certain cases one of the reacting partners will wind up in a relatively enclosed space, embraced by the other reactant - this is when the host-guest description is most appropriate. The undoubtedly most important member of the cyclodextrin family is which has become a cheap...