| 微量加碱法合成聚合氯化铝的改进及Al13形成机理 |
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| 引用本文： | 赵华章,彭凤仙,栾兆坤,徐毅,陈福泰.微量加碱法合成聚合氯化铝的改进及Al13形成机理[J].环境化学,2004,23(2):202-207. |
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| 作者姓名： | 赵华章 彭凤仙 栾兆坤 徐毅 陈福泰 |
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| 作者单位： | 1. 中国科学院生态环境研究中心环境水质学国家重点实验室,北京,100085
2. 长沙环境保护学校 |
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| 基金项目： | 国家 8 63重大专项课题 (2 0 0 2AA60 1 2 90)，国家自然科学基金(批准号:5 0 1 780 67)资助项目 |
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| 摘 要： | 通过提高反应温度和加碱速度对做量加碱法进行了改进，从而提高了反应速度，缩短了反应时间，并提高了AlCl3、和NaOH的允许浓度及产品的总铝浓度．同时对AlCl3的形成机理进行了探讨．结果表明，_Ala形态首先与OH^-反应生成Ale形态，然后Ale形态与Ala形态反应生成了Alb形态，即AlCl3形态．第二步反应较慢，为总反应的速率控制步骤，且为吸热反应，AlCl3的生成速率随反应温度的升高而增大．
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| 关 键 词： | 微量加碱法 聚合氯化铝 Al13 反应速度 反应时间 温度 |
THE IMPROVEMENT ON THE MICROINJECTION OF BASE METHOD FOR SYNTHESIZING POLYALUMINUM CHLORIDE(PAC) AND THE DISCUSSION ON THE FORMATION MECHANISM OF Al13 SPECIES |
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| ZHAO Hua,zhang,PENG Feng,xian,LUAN Zhao,kun,XU Yi,CHEN Fu,tai.THE IMPROVEMENT ON THE MICROINJECTION OF BASE METHOD FOR SYNTHESIZING POLYALUMINUM CHLORIDE(PAC) AND THE DISCUSSION ON THE FORMATION MECHANISM OF Al13 SPECIES[J].Environmental Chemistry,2004,23(2):202-207. |
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| Authors: | ZHAO Hua zhang PENG Feng xian LUAN Zhao kun XU Yi CHEN Fu tai |
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| Abstract: | The microinjectioin of base method for synthesizing polyaluminum chloride(PAC)was improved by elevating reaction temperature and increasing alkali feeding rate,which led to an enhanced reaction rate,an shortened reaction time,and increased materials(AlCl 3 and NaOH)concentration limits and final aluminum concentration.The formation mechanism of Al 13 species was also discussed.The results show that Al a species reacts with OH - to form Al c species at first,then Al c species reacts with Al a species to form Al b species,that is Al 13 species.The second reaction is slow and is a control step,moreover it is an endothermic reaction,The formation velocity of Al 13 species is increased with elevating the reaction temperature. |
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| Keywords: | polyaluminum chloride microinjection of base method species |
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