What dimethyl ether catalysts are used?
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I’d like to know how the development of dimethyl ether catalysts is progressing at present How are the catalysts that are being used by numerous factories in China? Which domestic catalysts are they using? How is the performance? Does anyone use imported catalysts? I’d like to know about the performance advantages. . .
An industrial plant with an annual production capacity of 100,000 tons of dimethyl ether, built by Hebei Zhongjie Petrochemical Group, was recently put into operation. Industrial catalysts and process technologies were provided by the Dalian Institute of Chemical Physics, Chinese Academy of Sciences, while the engineering design was carried out by Donghua Engineering Company. At present, the device operates smoothly with stable product quality, and the purity of dimethyl ether exceeds 99.5%. It is reported that by taking into account **planning and market demands, the Dalian Institute of Chemical Physics has utilized newly developed catalytic materials of its own design as catalysts, along with novel reaction processes, to create a patented technology for the production of dimethyl ether from methanol, which holds independent intellectual property rights. The new catalyst features high activity and good selectivity. It features a low initial reaction temperature, a high one-pass conversion rate of methanol, few side reactions, and a uniform temperature in the reaction bed.
Production method and application: The CNM-3 catalyst, which is obtained by heat-treating aluminum oxide hydrate and then adding small amounts of other active components and additives, is used for the gas-phase dehydration synthesis of dimethyl ether using methanol as a raw material. Performance features: This catalyst exhibits good catalytic activity, high selectivity, a long service life, simple operation, and strong resistance to poisons in the catalytic reaction for the synthesis of dimethyl ether via methanol vapor dehydration. It maintains stable catalytic performance even after long-term use. Physical and chemical properties: Composition – mainly γ-Al2O3, with a small amount of other active components added. Appearance – rod-shaped. Dimensions (diameter × height, mm) – φ3×(4–10). Specific surface area (m2/g) – 202±20. Pore volume (ml/g) – 0.50±0.03. Average pore size (mm) – 9.8±2.0. Bulk density (g/cm3) – ~0.70. Radial compressive strength (N/cm) – ≥60. Last edited by fengerjiaer on 2008-1-10 at 15:45
Did Topsoe use it at Yuntianhua?