共查询到16条相似文献,搜索用时 156 毫秒
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湿法磷酸中有机物的脱除方法 总被引:1,自引:0,他引:1
湿法磷酸中含有多种杂质,有机杂质是其中的一种。介绍了采用活性炭和化学氧化相结合脱除湿法磷酸中有机杂质的方法,分别研究了试剂用量、反应温度、反应时间和搅拌速度对脱除湿法磷酸中有机杂质的影响。结果表明,采用活性炭吸附和化学氧化相结合的方法脱除湿法磷酸中的有机杂质,最显著的影响因素为活性炭用量和双氧水用量;在最佳工艺条件下,该法可以脱除湿法磷酸中80.2%的有机杂质,净化后磷酸中残余的有机杂质含量低于食品级磷酸对有机杂质所要求的含量。该方法是脱除湿法磷酸中有机杂质的有效方法。 相似文献
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从植物基活性炭的制备及其吸附应用两个部分对国内外的研究进行了综述。介绍了不同生物质原料对活性炭品质和用途的影响,总结了常用活性炭炭化方法,着重阐述了不同活化方法的优缺点和研究现状,并对不同活性炭改性技术的特点和应用进行了比较。植物基活性炭的应用主要包括对硫化氢等工业废气和甲醛等室内废气的吸附净化,对废水中有机染料、有机药物、小分子有机化合物和重金属的吸附,以及被用于制作超级电容器电极材料等。最后针对目前研究中对植物原料的特点考虑不足、制备过程存在环境污染等问题,指出根据植物前体的性质优化制备方法、开发绿色高效制备技术、提高活性炭回收再利用效率将是今后的主要研究方向。 相似文献
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保险粉合成尾气净化回收CO2新工艺 总被引:3,自引:0,他引:3
针对保险粉尾气中含有不同的杂质成分,分别采用冷甲醇洗涤、活性炭吸附、水洗、碱洗、高锰酸钾洗涤、活性炭二次吸附和分子筛吸附等工艺过程对尾气实施净化.实践表明,经净化后的尾气杂质含量大幅度降低,回收的CO2气体可用于制造食品级CO32. 相似文献
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文章研究了泡沫镍生产中电镀液净化过程中温度、pH值、时间及活性炭用量对活性炭吸附有机物杂质的影响。实验结果表明:在最佳实验备件下,可以使电镀液中有机物杂质的脱除率达70%以上。 相似文献
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Qian Lin Yanbin Jiang Jianming Geng Yu Qian 《Chemical engineering journal (Lausanne, Switzerland : 1996)》2008,139(2):264-271
The aim of this research was to select suitable activated carbon (AC) for effective removal of organic impurities from industrial aqueous hydrogen peroxide solution to produce ultra-pure hydrogen peroxide. The textural parameters and surface chemistry of four kinds of AC samples were measured and analyzed. Static and dynamic equilibrium adsorption experiments were carried out to compare the effect of AC on organic impurities adsorption and hydrogen peroxide decomposition. The effects of AC pore structure and surface chemistry on the adsorption of organic impurities were investigated. The fitting operation conditions, i.e., operating temperature and AC dosage, were also examined. The results showed that AC adsorption capacity on organic impurities from industrial aqueous hydrogen peroxide solution was mainly influenced by micropore structure of AC, as well as decomposition of hydrogen peroxide. The pore size of 1–3 nm is most effective for adsorption of organic impurities. It was found that the organic impurities in industrial hydrogen peroxide solution could be reduced effectively to meet the standard of ultra-pure hydrogen peroxide of SEMI-C8 level with the proposed AC and adsorption techniques. 相似文献
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对不同级别过氧化氢的用途作了简要叙述,详细介绍了电子级过氧化氢的应用领域、质量标准、纯化技术和国内外研究发展现状。 相似文献
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Hiep Thuan Lu Wen Li Ehsan Soroodan Miandoab Shinji Kanehashi Guoping Hu 《Frontiers of Chemical Science and Engineering》2021,15(3):464-482
The global energy market is in a transition towards low carbon fuel systems to ensure the sustainable development of our society and economy. This can be achieved by converting the surplus renewable energy into hydrogen gas. The injection of hydrogen (≤10% v/v) in the existing natural gas pipelines is demonstrated to have negligible effects on the pipelines and is a promising solution for hydrogen transportation and storage if the end-user purification technologies for hydrogen recovery from hydrogen enriched natural gas (HENG) are in place. In this review, promising membrane technologies for hydrogen separation is revisited and presented. Dense metallic membranes are highlighted with the ability of producing 99.9999999% (v/v) purity hydrogen product. However, high operating temperature (≥300 °C) incurs high energy penalty, thus, limits its application to hydrogen purification in the power to hydrogen roadmap. Polymeric membranes are a promising candidate for hydrogen separation with its commercial readiness. However, further investigation in the enhancement of H2/CH4 selectivity is crucial to improve the separation performance. The potential impacts of impurities in HENG on membrane performance are also discussed. The research and development outlook are presented, highlighting the essence of upscaling the membrane separation processes and the integration of membrane technology with pressure swing adsorption technology. 相似文献
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