moncler günstig The application of rare earth per

The application of rare earth permanent magnet and the market

Sales of 2015 tons in 1990 (sintered magnets), 1992 to 2290 tons, compared with 1990 growth l3.65. Trade is expected to about 2,700 tons in 1993, predicted that 1995 could be increased to about 4,000 tons. Scientists predict that rare earth permanent magnet, the next few years, rare earth magnets in the world market, NdFeB will dominate. (Continued on page 44) * 44 * 1994, the world's No. 4 non-ferrous metal cobalt catalyst, cobalt organic acid is a liquid-phase oxidation catalyst, and manganese in this - play a major role in the field. Such as cobalt acetate and manganese acetate as a catalyst in the chemical fiber industry has been widely used. Second, the metal catalyst responsible for the major means of such catalyst platinum, palladium, rhodium and silver of these catalysts are expensive, but the proportion of metal to use more effective Nevertheless, the use of effects can not compensate for the discount, so not only in the heavy metal catalyst circumstances to complete the reaction using the metal catalyst, the hydrogenation reaction at low temperature using nickel catalyst and sometimes does not work, and at high temperatures,[link widoczny dla zalogowanych], heavy metal catalyst and prone to the shortcomings of semi-melt and heavy metal catalyst is also easy to produce side effects, etc. shortcomings, addition, oxidation catalyst, the metal itself is a strong combination with oxygen. Therefore, if not non-use of oxide redox mechanism, then the precious metal oxide catalyst is not easy to show unique properties. In order to improve the performance of precious metal catalyst, the use of surface area carrier such as activated carbon, alumina and other carriers, in order to prevent a precious metal catalyst at high temperatures partially melt the state, can be inserted halide, and made with the rhenium to prevent the formation of binary alloys half financial state. Precious metals silver catalyst for oxidation reactions, such as ethylene oxide catalyst for the use of Ag-AIOs, manufacturing, formalin also used for automobile exhaust purification catalyst Ag use changes and economic relations, use O. 2 below Pt, Pd,[link widoczny dla zalogowanych], Rh alloy catalyst, or monomer, acetic acid from methanol as a catalyst for the use of Rh complexes. To Co as the raw material in the Rh - SiO: acetic acid synthesis fixed-bed process is feasible. Third, other nonferrous metal catalyst for the catalyst made of other non-ferrous metals are still many, here a brief introduction of several, including vanadium, chromium, rhenium and other deputy group elements, very few of these metal catalysts to produce a single quality element is present, regular use of its general induced valence changes in the redox function. Such as vanadium from the regular five price changes are four price changes are trivalent, and contrary, rhenium from positive to seven price changes is six, is five, is the second price and contrast, etc. pentoxide vanadium in high temperature conditions of the supplemental oxygen-based oxidation Principal component catalyst, inorganic chemical oxidation of sulfur dioxide in the first Pt catalysts have been used, the current alumina oxide were converted to five. Pentoxide vanadium is the NH NO at low temperatures also, the main catalyst for the original response. CrOs eleven Al20a catalyst for paraffin, olefin and aromatic alkane dehydrogenation with good results. Particularly high resistance to toxicity of rhenium catalyst, it can also inhibit the financial state of semi-aluminum, extended Pt catalyst ~ era,, doped with nickel on the nickel catalyst can inhibit the semi-protected financial status. Fully dagger above, a wide range of non-ferrous metal catalyst, in a variety of industrial applications more widely, a lot of new catalysts to be developed,[link widoczny dla zalogowanych], due to limited space, this article concerns only a few types of non-ferrous metal catalyst. As technology advances, I believe the field of non-ferrous metals in the catalyst application will update the steps taken (on the next page section 3l) the average cost of 94 Western countries, and continues to rise. In the long run,[link widoczny dla zalogowanych], only two aluminum thigh country's products in the international market is competitive,[link widoczny dla zalogowanych], and have a degree of modernization of technological transformation. The rest of the smelter had closed, but if the local government to take protective measures for its, and its products are also available for local needs. Russia's primary aluminum, but never did like the flood flows to the West can not stop, because the relationship between price, they will withdraw from the international market. (WANG Zhu-tang) (continued from page d Cool

of rare earth rich in resources, which resources are about 500 million tons of Nd (in NdFeB dollars) as full for the production of NdFeB, estimates can be used around the year 2000. Because resources are more abundant Nd than Sm, and the price is low and about 4-5 times compared samarium, NdFeB magnets better performance, so the NdFeB magnet production and application development, the prospects even brighter. Western world is also rich in rare earth resources, which are more abundant Nd. Therefore, the raw materials to develop NdFeB magnets and no problem. In short, domestic and international Nd-FeB magnets production and application development will be more rapid. Raw materials have no problem. In short, the domestic and international NaFeB magnet production and application development will be more rapid.

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