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Selective oxidation of metal oxides
- Aug 22, 2016 -

In organic chemistry in the, oxidation is refers to: ① dehydrogenation, as CH-the → CH=CH-the → CH ≡ CH; II electric negative sex big of elements (as nitrogen, and p, and oxygen, and sulfur, and fluoride) replaced and carbon combined of hydrogen Atomic, as CH-the → CHOH-the → CHO-the → HCOOH-the → CO, if raw materials completely into for carbon dioxide and water, is called completely oxidation or depth oxidation; if reaction in Midway stop, is called select oxidation or part Oxidation ; Hydrocarbons (particularly alkene) reaction of ammonia oxidation in the presence of ammonia:

2R[557-01]CH+3O+2NH → 2RCN+6HO-it is also a selective oxidation. When the reactant molecules combine with oxygen, fracture of the first key, keys to 226,000 kcal/mol of nitrogen molecules, molecular oxygen was 119,000 kcal/mole, 104,000 kcal/mol of hydrogen molecules, molecular fluorine is 38,000 kcal/mole, carbon-carbon bond is 88,000 kcal/mol. Key break is always the first break weak keys. Therefore, molecular fluorine participation first fracture when fluorine-fluorine oxide, generate free atoms. Involved in the oxidation of oxygen, first not broken oxygen-oxygen bond, but follows: first break oxide of hydrogen hydrogen-hydrogen bonds; II oxidation of saturated hydrocarbon first fracture of carbon-carbon bonds or in the catalyst first break carbon-hydrogen bonds. Not on oxygen adsorption on catalyst, and the direct effect of reaction it is the role of oxygen in oxide catalysts and reactants, and reinstated as catalyst and oxygen and hypoxia.