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Recovery Technology of DMF from Wet Type Polyurethane Synthetic Leather Waste Gas 被引量:15
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作者 赵舜华 宋锡瑾 +2 位作者 裴宁 张景铸 刘书庆 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2008年第3期461-464,共4页
A new recovery technology is developed to recycle N,N-dimethyl formamide (DMF) in waste gas from wet type polyurethane synthetic leather industry. Given that the concentration of DMF in waste gas was as low as 325.6... A new recovery technology is developed to recycle N,N-dimethyl formamide (DMF) in waste gas from wet type polyurethane synthetic leather industry. Given that the concentration of DMF in waste gas was as low as 325.6- 688.3 mg·m^-3, it was necessary to make sure two phases contact adequately and strengthen the mass transfer by increasing contact area and enhancing the turbulence. Therefore, two-stage countercurrent absorption and two-stage fog removing system were introduced into the technology. The top section of the absorption column was filled with structured wire-ripple stainless steel packing BX500, while the lower section with sting-ripple packing CB250Y. Total height of packing material was 6 m. In addition, there were both two-stage fog removing layer and high efficiency liquid distributor at the column top. All the operating parameters, including temperature, pressure, flow rate and liquid position, could be controlled by computers without manual operation, making sure the outlet gas achieved the national emission standard that the DMF concentration should be below 40 mg·m^-3. The whole equipment could recover 237.6 t of DMF each year, with the profit up to CNY 521×10^3. 展开更多
关键词 N N-DIMETHYLFORMAMIDE polyurethane synthetic leather ABSORPTION RECOVERY
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三价镀铬的研究概况 被引量:4
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作者 杜登学 周磊 王介坤 《山东轻工业学院学报(自然科学版)》 CAS 1999年第4期60-63,共4页
本文概述了国内外三价镀铬的研究情况,重点介绍了DMF工艺和Alecra- 3 工艺。
关键词 电镀 镀铬 三价铬 dmf工艺
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直接金属制造法的优越性
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作者 杨英惠 《现代材料动态》 2004年第9期14-14,共1页
关键词 直接金属制造法 固态自由成形法 CAD 粉末冶金 dmf工艺
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