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Al30是新发现的有确切结构的由30个Al原子聚合组成的高聚铝,并被认为是一种混凝优势形态,然而有关高Al30含量絮凝剂生产技术参数非常缺乏,为明确有关影响,主要运用27Al NMR手段研究各类聚合铝(polyaluminum chloride,PAC)溶液在高温条件下的转化反应及转化后的形态,结果表明,高温条件下Al13转化生成了Al30,熟化的PAC比不熟化PAC有更高的转化率,高纯Al13的转化过程中发现有Al14,但掺入单体铝后Al14消失,PAC碱化度控制在2.0~2.4之间、Al13聚集体碱化度控制在2.6以下以及商业聚合铝的稀释和熟化处理等有利于Al13向Al30的转化。n(Si)/n(Al)=0.05时有最佳的Al30生成。
Al30 is a recently discovered highly polymerized aluminum of 30 Al atoms polymerized with a definite structure and is considered to be a predominantly coagulated morphology. However, the technical parameters for the production of flocculants with high Al30 content are very scarce. To clarify the impact, 27Al NMR was used to study the conversion reaction and transformation morphology of various polyaluminum chloride (PAC) solutions under high temperature. The results showed that Al30 was transformed to Al30 under high temperature, while ripened PAC was more than unfilled PAC Al14 was found during the conversion of high purity Al13, Al14 disappeared after the addition of monomeric aluminum, the degree of alkalization of PAC was controlled between 2.0 and 2.4, the alkalization degree of Al13 aggregates was controlled below 2.6 and Commercial polymerization of aluminum dilution and aging treatment is conducive to Al13 Al30 conversion. The best Al30 formation is found at n (Si) / n (Al) = 0.05.